US20070283680A1 - Exhaust Processor And Associated Method - Google Patents
Exhaust Processor And Associated Method Download PDFInfo
- Publication number
- US20070283680A1 US20070283680A1 US11/568,836 US56883605A US2007283680A1 US 20070283680 A1 US20070283680 A1 US 20070283680A1 US 56883605 A US56883605 A US 56883605A US 2007283680 A1 US2007283680 A1 US 2007283680A1
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- United States
- Prior art keywords
- valve
- exhaust
- actuator
- interior volume
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
- F01N1/023—Helmholtz resonators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/02—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by cutting out a part of engine cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/02—Tubes being perforated
Definitions
- the present disclosure relates generally to exhaust processors.
- Exhaust processors are used to process exhaust gas of an engine.
- One type of exhaust processor is a muffler. Mufflers may be configured in a variety of ways to attenuate sound generated as a result of combustion in the engine.
- Another type of exhaust processor is an emission abatement device which may be configured in a variety of ways to reduce exhaust gas emissions.
- an exhaust processor comprising an isolated interior volume that is defined in a housing of the exhaust processor so as to be isolated from exhaust gas in the housing.
- a motion converter is positioned in the isolated interior volume and is configured to convert in the isolated interior volume linear movement of a linear valve actuator into rotation of an exhaust valve.
- the exhaust processor is configured as a muffler.
- a cylinder control system is configured to selectively activate and de-activate cylinders of an engine and to act through the linear valve actuator and the motion converter to rotate the valve between different positions in response to such control of the engine cylinders.
- the muffler can be “tuned” to attenuate different sound frequencies as the engine mode of operation is changed.
- an exhaust processor comprises an exhaust valve, an exhaust valve mover, and a first pad.
- the exhaust valve mover is secured to the exhaust valve and movable to move the exhaust valve relative to an exhaust passageway to control flow of exhaust gas therein.
- the first pad is configured to be contacted by the exhaust valve mover to stop movement of the exhaust valve mover in a cushioned manner so as to position the valve in a first valve position.
- the pad(s) may be positioned internally or externally to an exhaust treatment device of the exhaust processor.
- FIG. 1 is a simplified block diagram showing an exhaust processor for processing exhaust gas of an engine
- FIG. 2 is a sectional view of the exhaust processor
- FIG. 3 is a perspective view of a valve module of the exhaust processor
- FIG. 4 is a sectional view showing internal components of the valve module
- FIG. 5 is a fragmentary sectional view taken along lines 5 - 5 of FIG. 2 when a valve of the valve module is in a flow-enabling position;
- FIG. 6 is a fragmentary sectional view taken along lines 6 - 6 of FIG. 2 showing the valve in the flow-enabling position;
- FIG. 7 is a fragmentary sectional view similar to FIG. 5 when the valve is in a flow-restricting position
- FIG. 8 is a fragmentary sectional view similar to FIG. 6 showing the valve in the flow-restricting position
- FIG. 9 is a sectional view of another exhaust processor
- FIG. 10 is an elevation view of a motion limiter
- FIG. 11 is a fragmentary perspective view of yet another exhaust processor.
- an apparatus 10 comprising an exhaust processor 12 for processing exhaust gas (“EG” in FIG. 1 ) of an engine 14 .
- the exhaust processor 12 has an isolated interior volume 16 that is defined in a housing 18 of the processor 12 so as to be isolated from exhaust gas in the housing 18 .
- An exhaust valve 17 is mounted in the housing 18 for rotation relative thereto.
- a motion converter 20 is positioned in the isolated interior volume 16 and is configured to convert in the isolated interior volume 16 linear movement of a linear valve actuator 22 into rotation of the valve 17 .
- Such an arrangement provides a relatively compact design while avoiding exposure of the motion converter 20 to hot exhaust gas, thereby promoting the useful life of the motion converter 20 and thus the useful life of the exhaust processor 12 .
- the exhaust processor 12 may be configured to include a variety of exhaust treatment devices.
- the exhaust processor 12 is configured as a muffler for use with the engine 14 in a cylinder de-activation scheme.
- the engine 14 is operable in a first engine mode in which a first number of engine cylinders is active (e.g., all eight cylinders of an eight-cylinder engine) and a second engine mode in a which a different second number of engine cylinders is active (e.g., only four cylinders of an eight-cylinder engine).
- a cylinder control system 24 is configured to control in which mode the engine 14 operates via an electrical connection 26 and is configured to control operation of the linear valve actuator 22 via an electrical connection 28 .
- the system 24 is responsive to changes of the engine mode to selectively energize and de-energize the actuator 22 (e.g., a linear solenoid actuator) to cause operation of the motion converter 20 in the isolated interior volume 16 to rotate the valve 17 between a first valve position associated with the first engine mode and a second valve position associated with the second engine mode.
- the actuator 22 e.g., a linear solenoid actuator
- a sound attenuation arrangement 30 provides an example of an exhaust treatment device positioned in the housing 18 .
- the sound attenuation arrangement 30 is configured to attenuate sound frequencies associated with the different engine modes.
- the exhaust treatment device located in the housing 18 may be an emission abatement device [e.g., catalyst(s), selective catalytic reduction device(s), NOx trap(s), catalyzed or uncatalyzed particulate filter(s), oxidation catalyst(s), to name just a few].
- the processor 10 includes the sound attenuation arrangement 30 so as to be configured as a muffler.
- Flow of exhaust gas into the processor 10 through an exhaust inlet port 32 is controlled by the position of the valve 17 which may be in a flow-enabling position as in FIGS. 2 and 4 - 6 or a flow-restricting position as in FIGS. 7 and 8 .
- Exhaust gas then flows through the sound attenuation arrangement 30 which may take a variety of forms, one such non-limiting exemplary form being shown mounted in the housing 18 in FIG. 2 .
- exhaust gas flows through an inlet passageway 34 having a perforation field 36 for attenuation of sound waves by sound absorbent material 38 captured between baffles 40 , 42 .
- the inlet passageway 34 is provided by a valve tube 44 containing the valve 17 and an elongate tube 46 extending from the valve tube 44 to a transfer chamber 48 defined between the baffle 42 and a baffle 50 .
- a Helmholtz chamber 52 is defined between the baffle 50 and an end cap 54 for attenuation of sound waves that enter through a tube 56 .
- the exhaust gas then flows through a curved tube 58 to an exhaust outlet port 60 .
- the curved tube 58 has two more perforation fields 62 , 64 for attenuation of sound waves by the sound absorbent material 38 .
- an internal valve module 66 of the exhaust processor 12 It is “internal” in the sense that portions of the module 66 are to be positioned inside the housing 18 .
- the valve module 66 includes an isolating enclosure 68 that defines therein the isolated interior volume 16 .
- the module 66 further includes the valve 17 in the valve tube 17 , the linear valve actuator 22 , and the motion converter 20 in the isolated interior volume 16 .
- the valve module 66 is constructed before securement in a shell 70 of the housing 18 .
- a first portion 72 of the isolating enclosure 68 along with its contents is then inserted into the shell 70 (as suggested by arrow 74 in FIG. 2 ) and an end cap 76 secured to a second portion 78 of the isolating enclosure 68 is secured to the shell 70 .
- the first portion 72 of the isolating enclosure 68 comprises a can 80 and a datum plate 82 secured to a surrounding side wall of the can 80 .
- the can 80 and the datum plate 82 cooperate to define therebetween a first chamber 84 of the isolated interior volume 16 .
- the valve tube 44 extends through and is secured to the can 80 and datum plate 82 .
- the second portion 78 of the isolating enclosure 68 comprises a link tube 86 and a cap 88 secured to and covering an end of the link tube 86 .
- the link tube 86 extends into an opening formed in the datum plate 82 and is secured to the datum plate 82 .
- the link tube 86 also extends through an opening formed in the end cap 76 to a location outside the shell 70 .
- the link tube 86 and cap 88 thus cooperate to provide a portion of the housing 18 .
- the link tube 86 defines therein a second chamber 90 of the isolated interior volume 16 in communication with the first chamber 84 .
- the link tube 86 and the cap 88 cooperate with the shell 70 and the end caps 54 , 76 to provide the housing 18 of the exhaust processor 12 .
- An actuator power supply 89 (e.g., pulse-width modulation unit) is secured to an external surface of the link tube 86 .
- the power supply 89 receives electrical signals on electrical wiring 91 from the cylinder control system 24 and transmits electrical signals on electrical wiring 93 to the actuator 22 to control operation of the actuator 22 .
- the linear valve actuator 22 is secured to the cap 88 .
- bolts 92 are used to secure a flange 94 of an actuator housing 96 of the actuator 22 to the cap 88 .
- a sound abatement pad 98 is positioned between and in contact with the flange 94 and the cap 88 to reduce generation of sound during movement of a piston 100 in and out of the housing 96 due to energization and de-energization of the actuator 22 .
- Smaller sound abatement pads 102 may also be placed between the heads of the bolts 92 and the flange 94 . In such an arrangement, bolts 92 extend through the flange 94 , pads 102 , pad 98 , and the cap 88 and are retained by corresponding nuts. It is within the scope of this disclosure to omit the pads 102 .
- the motion converter 20 is configured to convert linear movement of the piston 100 along an actuator axis 101 to rotation of the valve 17 about a valve axis 103 transverse to the actuator axis 101 . Such motion conversion occurs in the isolated interior volume 16 .
- the motion converter 20 comprises a link 104 , a lever 106 , and a rotatable shaft 108 , which extend in the isolated interior volume 16 .
- the link 104 connects the piston 100 and the lever 106 and extends in the second chamber 90 defined in the link tube 86 .
- the link 104 moves along the actuator axis 101 to rotate the lever 106 and thus the shaft 108 and valve 17 in response to linear movement of the piston 100 along the actuator axis 101 due to energization and de-energization of the actuator 22 .
- the shaft 108 connects the lever 106 and the valve 17 and, along with the lever 106 , extends in the first chamber 84 .
- the shaft 108 is configured to be rotated by the lever 106 about the valve axis 103 to cause rotation of the valve 17 about the valve axis 103 between its flow-enabling position shown in FIGS. 5 and 6 and its flow-restricting position shown in FIGS. 7 and 8 .
- the shaft 108 is mounted for rotation in a shaft tube 112 secured to the datum plate 82 , the valve tube 44 , and a stop mounting plate 114 and mounted for rotation in a pair of bushings 113 (e.g., wire mesh bushings) secured to valve tube 44 .
- a pair of bushings 113 e.g., wire mesh bushings
- a spring 116 surrounding the piston 100 acts against a spring retainer 118 on the piston 100 to bias the lever 106 against a first stop 120 secured to the stop mounting plate 114 so as to position the valve 17 in the flow-enabling position.
- the spring 116 causes the valve 17 to assume its flow-enabling position.
- energization of the actuator 22 causes rotation of the valve 17 to its flow-restricting position.
- actuator energization causes linear retraction of the piston 100 into the actuator housing 96 against a biasing force of the spring 116 .
- the link 104 is thus moved to the right (in FIG. 7 ) along the actuator axis 101 causing the lever 106 to rotate into contact with a second stop 122 secured to the stop mounting plate 114 and causing the shaft 108 to rotate the valve 17 about the valve axis 103 to the flow-restricting position.
- the spring 116 will cause the piston 100 to withdraw from the actuator housing 96 so that the link 104 moves to the left (in FIG. 7 ) and rotates the lever 106 into contact with the first stop 120 to cause the shaft 108 to rotate the valve 17 back to the flow-enabling position.
- the motion converter 20 and the linear valve actuator 22 cooperate to provide an exhaust valve mover of the exhaust processor 12 .
- the exhaust valve mover is secured to the exhaust valve 17 and is movable to move the valve 17 relative to an exhaust passageway (e.g., defined in valve tube 44 ) to control flow of exhaust gas therein.
- the stops 120 , 122 and mounting plate 114 cooperate to provide a motion limiter 124 for limiting motion of the exhaust valve mover.
- Each stop 120 , 122 may be configured as a pad configured to be contacted by the exhaust valve mover to stop movement of the exhaust valve mover in a cushioned manner so as to position the valve 17 in the respective valve position.
- each stop 120 , 122 is configured to be contacted by the lever 106 of the motion converter 20 to stop rotation of the lever 106 in a cushioned manner so as to position the valve 17 in the respective valve position.
- Each stop 120 , 122 may be, for example, as a wire mesh pad, an elastomeric (e.g., rubber) pad, or other pad that is sufficiently compliant for cushioning stoppage of rotation of the lever 106 . Such a configuration promotes noise abatement and component wear reduction.
- a number of components of the valve module 66 is secured to the datum plate 82 .
- the can 80 , the valve tube 44 , the link tube 86 , and the shaft tube 112 are all secured directly to the datum plate 82 such as, for example, by welding. In this way, component tolerance variation and component thermal variation (due, for example, to heat encountered from welding during assembly) are accommodated.
- an apparatus 210 comprising an external valve module 266 fluidly coupled to an exhaust treatment device 230 (e.g., muffler, emission abatement device) to control flow of exhaust gas of the engine 14 to the device 230 .
- the module 266 is “external” in the sense that it is configured to be secured to the device 230 so as to be mounted primarily externally thereto.
- the valve module 266 and the exhaust treatment 230 provide an exhaust processor 212 for use in the aforementioned cylinder de-activation scheme or other exhaust applications.
- valve module 266 Several components of the valve module 266 are similar in structure and function to components of the valve module 66 so that identical reference numbers refer to similar structures.
- a valve tube 244 of the module 266 contains the valve 17 for rotation therein and is secured to the exhaust treatment device 230 .
- the motion converter 20 , the linear valve actuator 22 , and the motion limiter 124 provided by the stops 120 , 122 and plate 114 are mounted externally to the exhaust treatment device 230 .
- the can 80 and the datum plate 82 can be omitted from the valve module 266 .
- the shaft tube 112 is secured to and interconnects the stop mounting plate 114 and the valve tube 266 .
- the link tube 86 and valve actuator 22 may be mounted by securement of the link tube 86 to the shaft tube 112 or some other connector (not shown) secured to the link tube 86 and the valve tube 244 .
- the motion limiter 324 for use in place of the motion limiter 124 .
- the motion limiter 324 has a single stop 320 secured to a mounting plate 314 secured to the shaft tube 112 .
- a curved plate 326 is secured to the lever 106 for rotation therewith. In so doing, the curved plate 326 rolls against the stop 320 throughout the range of motion of the lever 106 .
- the curved plate 326 thus serves to dampen impact forces of the lever 106 against the stop 320 which is, for example, configured as a pad.
- the stop 320 may be a wire mesh pad, an elastomeric (e.g., rubber) pad, or other pad sufficiently compliant to cushion stoppage of rotation of the lever 106 . As such, the stop 320 and the curved plate 326 promote noise abatement and component wear reduction.
- valve module 466 for use in the exhaust processor 212 in place of the valve module 266 .
- the valve module 466 is “external” in the sense that it is configured to be secured to the device 230 so as to be mounted primarily externally thereto.
- the valve module 466 comprises the exhaust valve 17 to control flow of exhaust gas to the exhaust treatment device 230 and an exhaust valve mover for moving the valve 17 between its valve positions.
- the linear valve actuator 22 and a motion converter 420 cooperate to provide the exhaust valve mover.
- the motion converter 420 is configured to convert linear movement of the linear valve actuator 22 into rotation of the exhaust valve 17 .
- the motion converter 420 comprises a link 404 , a lever 406 , and a shaft 408 .
- the link 404 connects the lever 406 and the plunger 100 to cause rotation of the lever 406 in response to linear movement of the plunger 100 .
- the shaft 408 connects the lever 406 and the valve 17 to rotate the valve 17 in response to rotation of the lever 406 .
- a cable 409 included in the link 404 extends between the plunger 100 and the lever 406 and is secured to the lever 406 .
- a torsion spring 416 extending around the shaft 408 biases the lever 406 so as to cause the plunger 100 to normally assume a retracted position and the valve 17 to normally assume its flow-enabling position.
- the link 404 and the lever 406 are positioned in link tubes 486 a , 486 b .
- the shaft 408 , a shaft tube 412 containing the shaft 408 , and the torsion spring 416 are positioned in a connector tube 417 connecting the link tube 486 b and a valve tube 444 containing the valve 17 .
- a connector bar 419 further facilitates connection of the link tubes 486 a , 486 b to the valve tube 444 .
- a motion limiter 424 for limiting motion of the lever 406 includes a stop 420 , a platform 414 , and a platform retainer 415 .
- the stop 420 is secured to the platform 414 which, in turn, is secured to the platform retainer 415 fixed to the link tube 486 a .
- the platform 414 and the platform retainer 415 cooperate to provide a stop mount 420 for mounting the stop 420 .
- the stop 420 is configured, for example, as a pad configured to be contacted by the lever 406 to stop rotation of the lever 406 in a cushioned manner to position the valve 17 in its flow-restricting position.
- the stop 420 may be a wire mesh pad, an elastomeric (e.g., rubber) pad, or other pad sufficiently compliant to cushion stoppage of rotation of the lever. As such, the stop 420 promotes noise abatement and component wear reduction.
Abstract
Description
- This application claims the benefit under 35 U.S.C. § 119(e) of U.S. Provisional Application No. 60/570,250 which was filed May 12, 2004 and is hereby incorporated by reference herein.
- The present disclosure relates generally to exhaust processors.
- Exhaust processors are used to process exhaust gas of an engine. One type of exhaust processor is a muffler. Mufflers may be configured in a variety of ways to attenuate sound generated as a result of combustion in the engine. Another type of exhaust processor is an emission abatement device which may be configured in a variety of ways to reduce exhaust gas emissions.
- According to an aspect of the present disclosure, there is provided an exhaust processor. The exhaust processor comprises an isolated interior volume that is defined in a housing of the exhaust processor so as to be isolated from exhaust gas in the housing. A motion converter is positioned in the isolated interior volume and is configured to convert in the isolated interior volume linear movement of a linear valve actuator into rotation of an exhaust valve. A method associated with this aspect of the disclosure is provided.
- In an implementation, the exhaust processor is configured as a muffler. A cylinder control system is configured to selectively activate and de-activate cylinders of an engine and to act through the linear valve actuator and the motion converter to rotate the valve between different positions in response to such control of the engine cylinders. As such, the muffler can be “tuned” to attenuate different sound frequencies as the engine mode of operation is changed.
- According to another aspect of the disclosure, an exhaust processor comprises an exhaust valve, an exhaust valve mover, and a first pad. The exhaust valve mover is secured to the exhaust valve and movable to move the exhaust valve relative to an exhaust passageway to control flow of exhaust gas therein. The first pad is configured to be contacted by the exhaust valve mover to stop movement of the exhaust valve mover in a cushioned manner so as to position the valve in a first valve position. There may also be a similar second pad configured to be contacted by the exhaust valve mover to stop movement of the exhaust valve mover in a cushioned manner so as to position the valve in a second valve position. The pad(s) may be positioned internally or externally to an exhaust treatment device of the exhaust processor. A method associated with this aspect of the disclosure is provided.
- The above and other features of the present disclosure will become apparent from the following description and the attached drawings.
-
FIG. 1 is a simplified block diagram showing an exhaust processor for processing exhaust gas of an engine; -
FIG. 2 is a sectional view of the exhaust processor; -
FIG. 3 is a perspective view of a valve module of the exhaust processor; -
FIG. 4 is a sectional view showing internal components of the valve module; -
FIG. 5 is a fragmentary sectional view taken along lines 5-5 ofFIG. 2 when a valve of the valve module is in a flow-enabling position; -
FIG. 6 is a fragmentary sectional view taken along lines 6-6 ofFIG. 2 showing the valve in the flow-enabling position; -
FIG. 7 is a fragmentary sectional view similar toFIG. 5 when the valve is in a flow-restricting position; -
FIG. 8 is a fragmentary sectional view similar toFIG. 6 showing the valve in the flow-restricting position; -
FIG. 9 is a sectional view of another exhaust processor; -
FIG. 10 is an elevation view of a motion limiter; and -
FIG. 11 is a fragmentary perspective view of yet another exhaust processor. - While the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific exemplary embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives following within the spirit and scope of the invention as defined by the appended claims.
- Referring to
FIG. 1 , there is shown anapparatus 10 comprising anexhaust processor 12 for processing exhaust gas (“EG” inFIG. 1 ) of anengine 14. Theexhaust processor 12 has an isolatedinterior volume 16 that is defined in ahousing 18 of theprocessor 12 so as to be isolated from exhaust gas in thehousing 18. Anexhaust valve 17 is mounted in thehousing 18 for rotation relative thereto. Amotion converter 20 is positioned in the isolatedinterior volume 16 and is configured to convert in the isolatedinterior volume 16 linear movement of alinear valve actuator 22 into rotation of thevalve 17. Such an arrangement provides a relatively compact design while avoiding exposure of themotion converter 20 to hot exhaust gas, thereby promoting the useful life of themotion converter 20 and thus the useful life of theexhaust processor 12. - The
exhaust processor 12 may be configured to include a variety of exhaust treatment devices. Exemplarily, theexhaust processor 12 is configured as a muffler for use with theengine 14 in a cylinder de-activation scheme. In such a case, theengine 14 is operable in a first engine mode in which a first number of engine cylinders is active (e.g., all eight cylinders of an eight-cylinder engine) and a second engine mode in a which a different second number of engine cylinders is active (e.g., only four cylinders of an eight-cylinder engine). - A
cylinder control system 24 is configured to control in which mode theengine 14 operates via anelectrical connection 26 and is configured to control operation of thelinear valve actuator 22 via anelectrical connection 28. In particular, thesystem 24 is responsive to changes of the engine mode to selectively energize and de-energize the actuator 22 (e.g., a linear solenoid actuator) to cause operation of themotion converter 20 in the isolatedinterior volume 16 to rotate thevalve 17 between a first valve position associated with the first engine mode and a second valve position associated with the second engine mode. - A
sound attenuation arrangement 30 provides an example of an exhaust treatment device positioned in thehousing 18. In such a case, thesound attenuation arrangement 30 is configured to attenuate sound frequencies associated with the different engine modes. In other examples, the exhaust treatment device located in thehousing 18 may be an emission abatement device [e.g., catalyst(s), selective catalytic reduction device(s), NOx trap(s), catalyzed or uncatalyzed particulate filter(s), oxidation catalyst(s), to name just a few]. - Referring to
FIG. 2 , there is shown a non-limiting example of theexhaust processor 12. In this example, theprocessor 10 includes thesound attenuation arrangement 30 so as to be configured as a muffler. - Flow of exhaust gas into the
processor 10 through anexhaust inlet port 32 is controlled by the position of thevalve 17 which may be in a flow-enabling position as inFIGS. 2 and 4 -6 or a flow-restricting position as inFIGS. 7 and 8 . Exhaust gas then flows through thesound attenuation arrangement 30 which may take a variety of forms, one such non-limiting exemplary form being shown mounted in thehousing 18 inFIG. 2 . - Illustratively, exhaust gas flows through an
inlet passageway 34 having aperforation field 36 for attenuation of sound waves by soundabsorbent material 38 captured betweenbaffles inlet passageway 34 is provided by avalve tube 44 containing thevalve 17 and anelongate tube 46 extending from thevalve tube 44 to atransfer chamber 48 defined between thebaffle 42 and abaffle 50. A Helmholtzchamber 52 is defined between thebaffle 50 and anend cap 54 for attenuation of sound waves that enter through atube 56. The exhaust gas then flows through acurved tube 58 to an exhaust outlet port 60. Thecurved tube 58 has twomore perforation fields absorbent material 38. - Referring to
FIGS. 2, 3 , and 4, there is shown aninternal valve module 66 of theexhaust processor 12. It is “internal” in the sense that portions of themodule 66 are to be positioned inside thehousing 18. - The
valve module 66 includes anisolating enclosure 68 that defines therein the isolatedinterior volume 16. Themodule 66 further includes thevalve 17 in thevalve tube 17, thelinear valve actuator 22, and themotion converter 20 in the isolatedinterior volume 16. During construction of theexhaust processor 12, thevalve module 66 is constructed before securement in ashell 70 of thehousing 18. Afirst portion 72 of the isolatingenclosure 68 along with its contents is then inserted into the shell 70 (as suggested by arrow 74 inFIG. 2 ) and anend cap 76 secured to asecond portion 78 of the isolatingenclosure 68 is secured to theshell 70. - The
first portion 72 of the isolatingenclosure 68 comprises acan 80 and adatum plate 82 secured to a surrounding side wall of thecan 80. Thecan 80 and thedatum plate 82 cooperate to define therebetween afirst chamber 84 of the isolatedinterior volume 16. Thevalve tube 44 extends through and is secured to thecan 80 anddatum plate 82. - The
second portion 78 of the isolatingenclosure 68 comprises alink tube 86 and acap 88 secured to and covering an end of thelink tube 86. Thelink tube 86 extends into an opening formed in thedatum plate 82 and is secured to thedatum plate 82. Thelink tube 86 also extends through an opening formed in theend cap 76 to a location outside theshell 70. Thelink tube 86 andcap 88 thus cooperate to provide a portion of thehousing 18. Thelink tube 86 defines therein asecond chamber 90 of the isolatedinterior volume 16 in communication with thefirst chamber 84. Thelink tube 86 and thecap 88 cooperate with theshell 70 and the end caps 54, 76 to provide thehousing 18 of theexhaust processor 12. - An actuator power supply 89 (e.g., pulse-width modulation unit) is secured to an external surface of the
link tube 86. Thepower supply 89 receives electrical signals onelectrical wiring 91 from thecylinder control system 24 and transmits electrical signals onelectrical wiring 93 to theactuator 22 to control operation of theactuator 22. - Referring to
FIG. 5 , thelinear valve actuator 22 is secured to thecap 88. In particular,bolts 92 are used to secure aflange 94 of anactuator housing 96 of theactuator 22 to thecap 88. Asound abatement pad 98 is positioned between and in contact with theflange 94 and thecap 88 to reduce generation of sound during movement of apiston 100 in and out of thehousing 96 due to energization and de-energization of theactuator 22. Smaller sound abatement pads 102 may also be placed between the heads of thebolts 92 and theflange 94. In such an arrangement,bolts 92 extend through theflange 94, pads 102,pad 98, and thecap 88 and are retained by corresponding nuts. It is within the scope of this disclosure to omit the pads 102. - Referring to
FIGS. 2, 5 , and 6, themotion converter 20 is configured to convert linear movement of thepiston 100 along anactuator axis 101 to rotation of thevalve 17 about avalve axis 103 transverse to theactuator axis 101. Such motion conversion occurs in the isolatedinterior volume 16. - The
motion converter 20 comprises alink 104, alever 106, and arotatable shaft 108, which extend in the isolatedinterior volume 16. Thelink 104 connects thepiston 100 and thelever 106 and extends in thesecond chamber 90 defined in thelink tube 86. Thelink 104 moves along theactuator axis 101 to rotate thelever 106 and thus theshaft 108 andvalve 17 in response to linear movement of thepiston 100 along theactuator axis 101 due to energization and de-energization of theactuator 22. - The
shaft 108 connects thelever 106 and thevalve 17 and, along with thelever 106, extends in thefirst chamber 84. Theshaft 108 is configured to be rotated by thelever 106 about thevalve axis 103 to cause rotation of thevalve 17 about thevalve axis 103 between its flow-enabling position shown inFIGS. 5 and 6 and its flow-restricting position shown inFIGS. 7 and 8 . Theshaft 108 is mounted for rotation in ashaft tube 112 secured to thedatum plate 82, thevalve tube 44, and astop mounting plate 114 and mounted for rotation in a pair of bushings 113 (e.g., wire mesh bushings) secured tovalve tube 44. - A
spring 116 surrounding thepiston 100 acts against aspring retainer 118 on thepiston 100 to bias thelever 106 against afirst stop 120 secured to thestop mounting plate 114 so as to position thevalve 17 in the flow-enabling position. Thus, when theactuator 22 is de-energized as inFIGS. 2, 5 , and 6, thespring 116 causes thevalve 17 to assume its flow-enabling position. - Referring to
FIGS. 7 and 8 , energization of theactuator 22 causes rotation of thevalve 17 to its flow-restricting position. In particular, actuator energization causes linear retraction of thepiston 100 into theactuator housing 96 against a biasing force of thespring 116. Thelink 104 is thus moved to the right (inFIG. 7 ) along theactuator axis 101 causing thelever 106 to rotate into contact with asecond stop 122 secured to thestop mounting plate 114 and causing theshaft 108 to rotate thevalve 17 about thevalve axis 103 to the flow-restricting position. When theactuator 22 is again de-energized, thespring 116 will cause thepiston 100 to withdraw from theactuator housing 96 so that thelink 104 moves to the left (inFIG. 7 ) and rotates thelever 106 into contact with thefirst stop 120 to cause theshaft 108 to rotate thevalve 17 back to the flow-enabling position. - The
motion converter 20 and thelinear valve actuator 22 cooperate to provide an exhaust valve mover of theexhaust processor 12. As such, the exhaust valve mover is secured to theexhaust valve 17 and is movable to move thevalve 17 relative to an exhaust passageway (e.g., defined in valve tube 44) to control flow of exhaust gas therein. - The
stops plate 114 cooperate to provide amotion limiter 124 for limiting motion of the exhaust valve mover. Eachstop valve 17 in the respective valve position. In such a case, eachstop lever 106 of themotion converter 20 to stop rotation of thelever 106 in a cushioned manner so as to position thevalve 17 in the respective valve position. Eachstop lever 106. Such a configuration promotes noise abatement and component wear reduction. - Referring back to
FIG. 2 , as alluded to above, a number of components of thevalve module 66 is secured to thedatum plate 82. In particular, thecan 80, thevalve tube 44, thelink tube 86, and theshaft tube 112 are all secured directly to thedatum plate 82 such as, for example, by welding. In this way, component tolerance variation and component thermal variation (due, for example, to heat encountered from welding during assembly) are accommodated. - Referring to
FIG. 9 , there is shown anapparatus 210 comprising anexternal valve module 266 fluidly coupled to an exhaust treatment device 230 (e.g., muffler, emission abatement device) to control flow of exhaust gas of theengine 14 to thedevice 230. Themodule 266 is “external” in the sense that it is configured to be secured to thedevice 230 so as to be mounted primarily externally thereto. Together, thevalve module 266 and theexhaust treatment 230 provide anexhaust processor 212 for use in the aforementioned cylinder de-activation scheme or other exhaust applications. - Several components of the
valve module 266 are similar in structure and function to components of thevalve module 66 so that identical reference numbers refer to similar structures. Avalve tube 244 of themodule 266 contains thevalve 17 for rotation therein and is secured to theexhaust treatment device 230. Themotion converter 20, thelinear valve actuator 22, and themotion limiter 124 provided by thestops plate 114 are mounted externally to theexhaust treatment device 230. As such, thecan 80 and thedatum plate 82 can be omitted from thevalve module 266. As with themodule 66, theshaft tube 112 is secured to and interconnects thestop mounting plate 114 and thevalve tube 266. Thelink tube 86 andvalve actuator 22 may be mounted by securement of thelink tube 86 to theshaft tube 112 or some other connector (not shown) secured to thelink tube 86 and thevalve tube 244. - Referring to
FIG. 10 , there is shown amotion limiter 324 for use in place of themotion limiter 124. Themotion limiter 324 has asingle stop 320 secured to a mountingplate 314 secured to theshaft tube 112. Acurved plate 326 is secured to thelever 106 for rotation therewith. In so doing, thecurved plate 326 rolls against thestop 320 throughout the range of motion of thelever 106. Thecurved plate 326 thus serves to dampen impact forces of thelever 106 against thestop 320 which is, for example, configured as a pad. Thestop 320 may be a wire mesh pad, an elastomeric (e.g., rubber) pad, or other pad sufficiently compliant to cushion stoppage of rotation of thelever 106. As such, thestop 320 and thecurved plate 326 promote noise abatement and component wear reduction. - Referring to
FIG. 11 , there is shown anexternal valve module 466 for use in theexhaust processor 212 in place of thevalve module 266. As with thevalve module 266, thevalve module 466 is “external” in the sense that it is configured to be secured to thedevice 230 so as to be mounted primarily externally thereto. Several components are similar in structure and function as to what has been disclosed above so that identical reference numbers refer to similar components. - The
valve module 466 comprises theexhaust valve 17 to control flow of exhaust gas to theexhaust treatment device 230 and an exhaust valve mover for moving thevalve 17 between its valve positions. Thelinear valve actuator 22 and amotion converter 420 cooperate to provide the exhaust valve mover. Themotion converter 420 is configured to convert linear movement of thelinear valve actuator 22 into rotation of theexhaust valve 17. - The
motion converter 420 comprises alink 404, alever 406, and ashaft 408. Thelink 404 connects thelever 406 and theplunger 100 to cause rotation of thelever 406 in response to linear movement of theplunger 100. Theshaft 408 connects thelever 406 and thevalve 17 to rotate thevalve 17 in response to rotation of thelever 406. Acable 409 included in thelink 404 extends between theplunger 100 and thelever 406 and is secured to thelever 406. Atorsion spring 416 extending around theshaft 408 biases thelever 406 so as to cause theplunger 100 to normally assume a retracted position and thevalve 17 to normally assume its flow-enabling position. Thelink 404 and thelever 406 are positioned inlink tubes shaft 408, ashaft tube 412 containing theshaft 408, and thetorsion spring 416 are positioned in aconnector tube 417 connecting thelink tube 486 b and avalve tube 444 containing thevalve 17. Aconnector bar 419 further facilitates connection of thelink tubes valve tube 444. - A
motion limiter 424 for limiting motion of thelever 406 includes astop 420, aplatform 414, and aplatform retainer 415. Thestop 420 is secured to theplatform 414 which, in turn, is secured to theplatform retainer 415 fixed to thelink tube 486 a. Theplatform 414 and theplatform retainer 415 cooperate to provide astop mount 420 for mounting thestop 420. Thestop 420 is configured, for example, as a pad configured to be contacted by thelever 406 to stop rotation of thelever 406 in a cushioned manner to position thevalve 17 in its flow-restricting position. Thestop 420 may be a wire mesh pad, an elastomeric (e.g., rubber) pad, or other pad sufficiently compliant to cushion stoppage of rotation of the lever. As such, thestop 420 promotes noise abatement and component wear reduction. - While the concepts of the present disclosure have been illustrated and described in detail in the drawings and foregoing description, such illustration and description is to be considered as exemplary and not restrictive in character, it being understood that only illustrative embodiments have been shown and described and that all changes and modifications that come within the spirit of the disclosure are desired to be protected.
- There are a plurality of advantages of the concepts of the present disclosure arising from the various features of the systems described herein. It will be noted that alternative embodiments of each of the systems of the present disclosure may not include all of the features described yet still benefit from at least some of the advantages of such features. Those of ordinary skill in the art may readily devise their own implementations of a system that incorporate one or more of the features of the present disclosure and fall within the spirit and scope of the invention as defined by the appended claims.
Claims (21)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/568,836 US20070283680A1 (en) | 2004-05-12 | 2005-05-12 | Exhaust Processor And Associated Method |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57025004P | 2004-05-12 | 2004-05-12 | |
US11/568,836 US20070283680A1 (en) | 2004-05-12 | 2005-05-12 | Exhaust Processor And Associated Method |
PCT/US2005/016701 WO2005113954A2 (en) | 2004-05-12 | 2005-05-12 | Exhaust processor and associated method |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070283680A1 true US20070283680A1 (en) | 2007-12-13 |
Family
ID=35428969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/568,836 Abandoned US20070283680A1 (en) | 2004-05-12 | 2005-05-12 | Exhaust Processor And Associated Method |
Country Status (2)
Country | Link |
---|---|
US (1) | US20070283680A1 (en) |
WO (1) | WO2005113954A2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9464559B2 (en) * | 2015-02-04 | 2016-10-11 | Middleville Tool & Die Co. | Passive exhaust valve assembly and forming method |
US9605581B1 (en) | 2015-12-24 | 2017-03-28 | Middleville Tool & Die Co. | Passive exhaust valve with floating spring stop |
JP2017160880A (en) * | 2016-03-11 | 2017-09-14 | クノールブレムゼ商用車システムジャパン株式会社 | Exhaust pipe shut-off valve device |
US10253664B2 (en) | 2016-01-15 | 2019-04-09 | Middleville Tool & Die Co. | Passive exhaust valve assembly with overlapping slip joint and method of forming and installation |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110552758B (en) * | 2019-08-01 | 2020-08-11 | 珠海市广源信科技有限公司 | Muffler exhaust method suitable for different working conditions |
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US3620330A (en) * | 1969-04-14 | 1971-11-16 | Oldberg Mfg Co | Muffler construction and method of selectively modifying its sound-attenuating characteristics |
US4866933A (en) * | 1988-09-21 | 1989-09-19 | Whau Chih Kao | Exhaust silencer |
US5014817A (en) * | 1988-07-29 | 1991-05-14 | Mazda Motor Corporation | Engine exhaust apparatus and method |
US5212948A (en) * | 1990-09-27 | 1993-05-25 | Donaldson Company, Inc. | Trap apparatus with bypass |
US5401001A (en) * | 1992-06-10 | 1995-03-28 | Siemens Automotive Ltd. | Internal combustion engine exhaust control valve |
US5634333A (en) * | 1994-09-09 | 1997-06-03 | Nippondenso Co., Ltd. | Exhaust pipe opening and closing apparatus |
US5723829A (en) * | 1995-02-24 | 1998-03-03 | Calsonic Corporation | Muffler assembly of internal combustion engine |
US6694727B1 (en) * | 2002-09-03 | 2004-02-24 | Arvin Technologies, Inc. | Exhaust processor |
US20050109024A1 (en) * | 2003-11-26 | 2005-05-26 | John Nohl | Electrically controlled exhaust valve |
-
2005
- 2005-05-12 WO PCT/US2005/016701 patent/WO2005113954A2/en active Application Filing
- 2005-05-12 US US11/568,836 patent/US20070283680A1/en not_active Abandoned
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US3620330A (en) * | 1969-04-14 | 1971-11-16 | Oldberg Mfg Co | Muffler construction and method of selectively modifying its sound-attenuating characteristics |
US5014817A (en) * | 1988-07-29 | 1991-05-14 | Mazda Motor Corporation | Engine exhaust apparatus and method |
US4866933A (en) * | 1988-09-21 | 1989-09-19 | Whau Chih Kao | Exhaust silencer |
US5212948A (en) * | 1990-09-27 | 1993-05-25 | Donaldson Company, Inc. | Trap apparatus with bypass |
US5401001A (en) * | 1992-06-10 | 1995-03-28 | Siemens Automotive Ltd. | Internal combustion engine exhaust control valve |
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US5723829A (en) * | 1995-02-24 | 1998-03-03 | Calsonic Corporation | Muffler assembly of internal combustion engine |
US6694727B1 (en) * | 2002-09-03 | 2004-02-24 | Arvin Technologies, Inc. | Exhaust processor |
US20050109024A1 (en) * | 2003-11-26 | 2005-05-26 | John Nohl | Electrically controlled exhaust valve |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9464559B2 (en) * | 2015-02-04 | 2016-10-11 | Middleville Tool & Die Co. | Passive exhaust valve assembly and forming method |
US9605581B1 (en) | 2015-12-24 | 2017-03-28 | Middleville Tool & Die Co. | Passive exhaust valve with floating spring stop |
US10253664B2 (en) | 2016-01-15 | 2019-04-09 | Middleville Tool & Die Co. | Passive exhaust valve assembly with overlapping slip joint and method of forming and installation |
JP2017160880A (en) * | 2016-03-11 | 2017-09-14 | クノールブレムゼ商用車システムジャパン株式会社 | Exhaust pipe shut-off valve device |
Also Published As
Publication number | Publication date |
---|---|
WO2005113954A3 (en) | 2006-06-15 |
WO2005113954A2 (en) | 2005-12-01 |
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