WO2008043802A1 - Method for detecting an activation of a start device for initializing a glow process - Google Patents

Method for detecting an activation of a start device for initializing a glow process Download PDF

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Publication number
WO2008043802A1
WO2008043802A1 PCT/EP2007/060800 EP2007060800W WO2008043802A1 WO 2008043802 A1 WO2008043802 A1 WO 2008043802A1 EP 2007060800 W EP2007060800 W EP 2007060800W WO 2008043802 A1 WO2008043802 A1 WO 2008043802A1
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WO
WIPO (PCT)
Prior art keywords
activation
starting device
initializing
detecting
start device
Prior art date
Application number
PCT/EP2007/060800
Other languages
German (de)
French (fr)
Inventor
Tahar Zrilli
Original Assignee
Continental Automotive Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2008043802A1 publication Critical patent/WO2008043802A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/503—Battery correction, i.e. corrections as a function of the state of the battery, its output or its type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/06—Parameters used for control of starting apparatus said parameters being related to the power supply or driving circuits for the starter
    • F02N2200/063—Battery voltage

Abstract

The invention relates to a method for detecting an activation of a start device for initializing a glow process by means of a glow plug. Here, an activation of the start device is inferred by observing the battery voltage.

Description

Beschreibungdescription
Verfahren zur Erkennung einer Aktivierung einer Startvorrichtung zur Initialisierung eines Glühvorgangs.A method for detecting activation of a starting device for initializing an annealing process.
Die Erfindung betrifft ein Verfahren zur Erkennung einer Aktivierung bei einer Startvorrichtung einer Brennkraftmaschine zur Initialisierung eines Glühvorgangs einer Glühkerze gemäß den Merkmalen des Oberbegriffs des Hauptanspruchs 1.The invention relates to a method for detecting an activation in a starting device of an internal combustion engine for initializing an annealing process of a glow plug according to the features of the preamble of the main claim. 1
Bei Dieselmotoren werden üblicherweise Glühkerzen eingesetzt, um ein Kaltstarten des Motors zu ermöglichen, da die Startwilligkeit von Dieselmotoren bei niedrigeren Temperaturen sinkt. Eine weitere Aufgabe der Glühkerzen ist es, den Verbrennungsprozess derart zu unterstützen, dass ein verbessertes Abgasverhalten der Brennkraftmaschine erzielt wird. Insbesondere soll mit den Glühkerzen eine Erhöhung der Last verursacht werden, die zu einer Anhebung der Abgastemperatur führt, und somit eine Abgasnachbehandlung, in z.B. einem Russfilter, erfolgen kann. Um den Verbrennungsprozess optimal zu unterstützen ist jedoch der Zeitpunkt der Aktivierung einer Startvorrichtung (z.B. Schlüssel umdrehen) möglichst exakt zu bestimmen. Nur dadurch kann ein zeitlich der Startphase optimal zugeordneter Glühvorgang der Glühkerzen sicherge- stellt werden.In diesel engines, glow plugs are commonly used to allow the engine to start coldly as the start-up capability of diesel engines decreases at lower temperatures. Another object of the glow plugs is to support the combustion process in such a way that an improved exhaust gas behavior of the internal combustion engine is achieved. In particular, the glow plugs should cause an increase in the load, which leads to an increase in the exhaust gas temperature, and thus an exhaust aftertreatment, in e.g. a soot filter, can be done. In order to optimally support the combustion process, however, the timing of activation of a starting device (e.g., turning over the key) is to be determined as accurately as possible. Only in this way can an ignition process of the glow plugs, which is optimally assigned to the start phase, be ensured.
Aus dem Stand der Technik sind Verfahren bekannt, bei denen die Bestimmung der Aktivierung der Startvorrichtung dadurch erfolgt, dass von der Startvorrichtung ein Signal ausgesandt wird und/oder die Entwicklung der Motordrehzahl betrachtet und ausgewertet wird.Methods are known from the prior art in which the determination of the activation of the starting device takes place in that a signal is emitted by the starting device and / or the development of the engine speed is considered and evaluated.
Die der vorliegenden Erfindung zu Grunde liegende Aufgabe besteht nun darin, ein Verfahren bereitzustellen, das unabhän- gig vom Startersignal und der Betrachtung der Motordrehzahl eine Aktivierung der Startvorrichtung identifiziert. Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.The object underlying the present invention is now to provide a method which identifies an activation of the starting device independently of the starter signal and the consideration of the engine speed. This object is achieved by the features of claim 1. Advantageous embodiments of the invention are characterized in the subclaims.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass eine Aktivierung der Startvorrichtung durch eine Beobachtung der Batteriespannung erfolgt. Die Batteriespannung ist eine Größe, die unabhängig von der Startvorrichtung oder den Betriebszuständen der Kraftmaschine kontinuier- lieh ermittelt wird. Die Batteriespannung steht somit zusätzlich zu den anderen bekannten Größen für die Einleitung des Glühvorgangs jederzeit zur Verfügung.The advantages achieved by the invention are, in particular, that an activation of the starting device is carried out by monitoring the battery voltage. The battery voltage is a quantity that is continuously detected independently of the starting device or the operating states of the engine. The battery voltage is thus always available in addition to the other known quantities for the initiation of the annealing process.
Einzelheiten der Erfindung werden anhand der Zeichnung näher erläutert. Dabei zeigt:Details of the invention will be explained in more detail with reference to the drawing. Showing:
Figur 1 : den Spannungsverlauf und den Verlauf des Aktivierungssignals der Startvorrichtung.Figure 1: the voltage curve and the course of the activation signal of the starting device.
Figur 1 zeigt den zeitlichen Verlauf der Batteriespannung und des Aktivierungssignals der Startvorrichtung. Dabei entspricht die Kennlinie 1 dem Spannungsverlauf der Batterie und die Kennlinie 2 dem Aktivierungssignal der Startvorrichtung. Die Kennlinie U entspricht dem unteren Grenzwert des Spannungsverlaufs, ab dem auf eine Aktivierung der Startvorrich- tung geschlossen wird.Figure 1 shows the time course of the battery voltage and the activation signal of the starting device. The characteristic curve 1 corresponds to the voltage curve of the battery and the characteristic curve 2 corresponds to the activation signal of the starting device. The characteristic curve U corresponds to the lower limit of the voltage curve, from which an activation of the starting device is concluded.
Zum Zeitpunkt tl erfolgt eine Aktivierung der Startvorrichtung, was an einem Anstieg der Kennlinie 2 sichtbar wird. Ein Spannungsabfall an der Kennlinie 1 kann dabei zu einem frühe- ren Zeitpunkt tθ, z.B. aufgrund der Zuschaltung von externen Lasten an die Batterie, die von dem Zeitpunkt der Aktivierung unabhängig sind, erfolgen. Die Zuschaltung der externen Lasten erfolgt dabei nur unter definierten Bedingungen, z.B. dann, wenn vom Schlüssel aus ein Befehl an eine Empfangsein- heit gesendet wird. Die Startphase endet im Zeitpunkt t2, was zu einer Erhöhung des Spannungsverlaufs der Kennlinie 1 und einem Abfall des Aktivierungssignals der Kennlinie 2 führt. Auf eine Aktivierung der Startvorrichtung wird geschlossen, wenn der Spannungsabfall der Kennlinie 1 kleiner/gleich dem unteren Grenzwert der Kennlinie U ist und/oder sich der Spannungswert für eine vorgebbare Zeitdauer unterhalb des unteren Grenzwerts U befindet. Die Zeitdauer darf dabei aber nicht länger als die Zeitdifferenz zwischen t2 und tθ betragen. At the time t 1, the starting device is activated, which is visible on an increase in the characteristic curve 2. A voltage drop across the characteristic curve 1 can take place at a previous time tθ, for example due to the connection of external loads to the battery, which are independent of the time of activation. The external loads are connected only under defined conditions, eg when a command is sent from the key to a receiving unit. The starting phase ends at the time t2, which leads to an increase in the voltage curve of the characteristic curve 1 and a fall in the activation signal of the characteristic curve 2. On activation of the starting device is closed when the voltage drop of the characteristic 1 is less than / equal to the lower limit of the characteristic U and / or the voltage value for a predetermined period of time is below the lower limit value U. The time period may not be longer than the time difference between t2 and tθ.

Claims

Patentansprüche claims
1. Verfahren zur Erkennung einer Aktivierung einer Startvorrichtung in einer Brennkraftmaschine zur Initialisierung ei- nes Glühvorgangs einer Glühkerze, welche mit einer Batteriespannung beaufschlagt wird, dadurch gekennzeichnet, dass eine Aktivierung der Startvorrichtung durch einen Abfall der Batteriespannung unter einen vorgebbaren unteren Grenzwert für eine vorgebbare Zeitdauer identifiziert wird. 1. A method for detecting an activation of a starting device in an internal combustion engine for initializing an annealing of a glow plug, which is acted upon by a battery voltage, characterized in that an activation of the starting device by a drop in the battery voltage below a predetermined lower limit for a predetermined period of time is identified.
PCT/EP2007/060800 2006-10-11 2007-10-10 Method for detecting an activation of a start device for initializing a glow process WO2008043802A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610048226 DE102006048226A1 (en) 2006-10-11 2006-10-11 A method for detecting activation of a starting device for initializing an annealing process
DE102006048226.3 2006-10-11

Publications (1)

Publication Number Publication Date
WO2008043802A1 true WO2008043802A1 (en) 2008-04-17

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WO (1) WO2008043802A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491100A (en) * 1982-06-14 1985-01-01 Nissan Motor Company, Limited Control system for a glow plug of an internal combustion engine
US5241929A (en) * 1992-08-19 1993-09-07 Navistar International Transportation Corp. Electronic engine control module incorporating glow plug and glow plug lamp control
US6561151B1 (en) * 2000-08-22 2003-05-13 3061868 Canada Inc. Remote control car starter
US20060144360A1 (en) * 2003-09-30 2006-07-06 James Beaucaire Apparatus and method for pre-cycle warm-up via wireless communication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4939347A (en) * 1987-12-17 1990-07-03 Jidosha Kiki Co., Ltd. Energization control apparatus for glow plug
JP4051981B2 (en) * 2002-04-01 2008-02-27 トヨタ自動車株式会社 Glow plug abnormality detection method and apparatus
JP2004137983A (en) * 2002-10-18 2004-05-13 Toyota Motor Corp Conduction abnormality detection method and device for electric load device of internal combustion engine
JP3810744B2 (en) * 2003-01-29 2006-08-16 日本特殊陶業株式会社 Glow plug energization control device and glow plug energization control method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491100A (en) * 1982-06-14 1985-01-01 Nissan Motor Company, Limited Control system for a glow plug of an internal combustion engine
US5241929A (en) * 1992-08-19 1993-09-07 Navistar International Transportation Corp. Electronic engine control module incorporating glow plug and glow plug lamp control
US6561151B1 (en) * 2000-08-22 2003-05-13 3061868 Canada Inc. Remote control car starter
US20060144360A1 (en) * 2003-09-30 2006-07-06 James Beaucaire Apparatus and method for pre-cycle warm-up via wireless communication

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