EP2639433A1 - Procédé destiné à empêcher le préallumage d'un mélange air-carburant dans une chambre de cylindre d'un moteur à combustion interne - Google Patents

Procédé destiné à empêcher le préallumage d'un mélange air-carburant dans une chambre de cylindre d'un moteur à combustion interne Download PDF

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Publication number
EP2639433A1
EP2639433A1 EP13154307.6A EP13154307A EP2639433A1 EP 2639433 A1 EP2639433 A1 EP 2639433A1 EP 13154307 A EP13154307 A EP 13154307A EP 2639433 A1 EP2639433 A1 EP 2639433A1
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EP
European Patent Office
Prior art keywords
ignition
fuel
measure
internal combustion
parameters
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.)
Granted
Application number
EP13154307.6A
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German (de)
English (en)
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EP2639433B1 (fr
Inventor
Andreas Dr. Birkigt
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Volkswagen AG
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Volkswagen AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • 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
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0611—Fuel type, fuel composition or fuel quality
    • F02D2200/0612—Fuel type, fuel composition or fuel quality determined by estimation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
    • F02D35/026—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures using an estimation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition

Definitions

  • the invention relates to a method for preventing a pre-ignition of a fuel-air mixture in a cylinder chamber of an internal combustion engine with the features of the preamble of claim 1.
  • pre-ignition is meant a process that occurs in an uncontrolled and premature ignition of the fuel-air mixture towards the end of the compression phase, especially in gasoline engines with high compression ratio or with supercharging, without that until then by the ignition system a spark has been generated.
  • the increases in temperature and pressure caused by the pre-ignition are intensified by the incomplete compression in the combustion chamber. Extreme temperature and pressure values in the combustion chamber are the result, which can ultimately lead to the destruction of engine components.
  • the document DE 10 2010 064 186 A1 describes a method and a device for the treatment of uncontrolled burns in an internal combustion engine by determining the number of detected uncontrolled burns in a monitoring window and comparing it with a threshold value, wherein when the threshold value is exceeded, a temperature in a combustion chamber of the internal combustion engine is lowered.
  • a disadvantage of this method is that the pre-ignition can only be detected when an event actually occurs, so that the pre-ignition only in the subsequent work cycles can be prevented. As a result, the engine damage caused by pre-ignition that has already occurred can not be ruled out.
  • Object of the present invention is the prevention of pre-ignition of a fuel-air mixture in a cylinder chamber of an internal combustion engine, with the pre-ignition can be largely prevented before the emergence, preferably completely.
  • a measure of the risk of Vorentflammungsneist at least a portion of at least one combustion chamber determined, wherein a measure of the surface temperature as a measure of the risk of Vorentflammungsneist for a subsequent (preferred) or later work cycle is determined and compared with a predetermined limit and that failure to comply with this limit for this previous cycle in the current (preferred) or subsequent working phase at least a change of at least one operating parameter of the drive train is initiated.
  • the internal combustion engine is preferably a gasoline or diesel engine.
  • a working cycle of an internal combustion engine is understood to mean a working cycle of a cylinder.
  • a work cycle consists of 4 working phases and 2 revolutions of the crankshafts. Determining may be, in particular, (preferably) calculating or measuring.
  • An advantage of the method according to the invention is that an impending pre-ignition can already be determined and recognized before it arises. By changing the operating parameters on the powertrain, pre-ignition can be largely prevented and thus also engine damage can be averted. Another advantage is the possibility to derive the measure of the surface temperature considering different parameters that are already available for other purposes. Also, the number of measures that cause the change in the operating parameters of the drive train is large. Both the individual measures and the combination of several lead to the prevention of pre-ignition.
  • the invention makes it possible to increase the charge and / or the compression ratio, in particular in a gasoline engine, and thus also to reduce fuel consumption.
  • the determination of these parameters can be done in various ways. Some parameters such as fuel consumption, ignition timing, ambient temperature, ambient pressure, humidity, cooling water temperature, oil temperature, fuel temperature, fuel pressure, fault memory.
  • Speed and load collective can be calculated. Particularly advantageous is the consideration of all parameters for determining the measure of the surface temperature. But it is also sufficient if only a few parameters, including but preferred rotation and load collective, ignition timing and the fuel quality, are taken into account.
  • the fuel quality is one of the operating parameters of the internal combustion engine.
  • the determination of the fuel quality can be carried out, for example, by evaluating the activity of a knock control:
  • a knock control comprises a knock sensor (structure-borne sound sensor). The signal of this knock sensor is examined with the help of electronic filters and a digital signal processor on the knock typical high-frequency vibration components. If the knock sensor registers a knocking of the engine, the ignition timing is automatically adjusted in such a way that no more knocking noises are detected. From the evaluation of the knock control can be concluded on the fuel quality.
  • the information about the occurrence of pre-ignition may belong to the operating parameters of the internal combustion engine. This information is preferred from the evaluation of Vorentflammungserkennungsfunktionen in the engine control unit taken.
  • the pre-ignition detection functions are functions that model the exact pre-ignition tendency of a cylinder. For example, two functions can be used to detect pre-ignition. On the one hand the so-called second knock window and on the other hand an evaluation of the high-resolution engine speed (HMD).
  • the normal knocking function detects specific body vibrations and assigns these to a cylinder, which requires special detection windows for the individual cylinders. The window length is determined, for example, as a function of the speed, engine load and the ignition angle on the engine test bench. (The normal knocking combustion depends on the ignition angle.)
  • the second detection window is located in front of the first detection window. At the time of the second knocking window, knocking burns can not occur under normal conditions since the time between the ignition angle and the start of knocking is too short. If there is a knock signal through the knock sensor, there is a pre-ignition.
  • the HMD analyzes the engine speed. On this signal is a vibration that is due to the periodic torque build-up of the cylinder. If there is an unexpectedly early speed increase, there is a pre-ignition.
  • the method can expediently be carried out such that a change in the operating parameters of the drive train takes place by initiating one or more of the following measures.
  • the measures include, for example, short-term and long-term charge and load reduction, modified injection timing, cylinder suppression, ignition angle change, change in fuel-air ratio, camshaft change and blocking or delaying switching operations.
  • the measures include, for example, short-term and long-term charge and load reduction, modified injection timing, cylinder suppression, ignition angle change, change in fuel-air ratio, camshaft change and blocking or delaying switching operations.
  • the threshold value of the pre-ignition tendency can be obtained from the evaluation of engine parameters from the control unit and subsequent model-based determination of the measure of the surface temperature.
  • a measure of the surface temperature may be a surface temperature or a radiation power of at least part of at least one combustion chamber.
  • the method of determining, for a current work cycle, a measure of the risk of pre-ignition of at least a portion of at least one combustion chamber based on one or more parameters of an internal combustion engine is a measure of the surface temperature as a measure of the risk Vorentflammungsne Trent determined for a subsequent cycle and compared with a predetermined limit. If this limit value is not adhered to for this preceding work cycle, at least one operating parameter is initiated on the drive train in the current work phase. Thus, the Vorentflammungsgefahr can be averted already in the current working phase of the engine. The surface temperature is thus permanently monitored so as not to allow pre-ignition.
  • An internal combustion engine typically has a controller that takes over the control, regulation and monitoring of engine functions.
  • the method according to the invention can be stored in a memory of an engine control unit as a program-controlled function.
  • a particularly advantageous arrangement may be that it is installed in a motor vehicle whose engine includes an engine control unit, in whose memory a program is stored, which comprises at least one part, in its execution a method with the features or the combination of features according to the claims 1 to 8 is initiated.
  • Motor vehicle can be a trackless wheeled vehicle.
  • Fig. 1 the method according to the invention is shown schematically. From the parameters of the internal combustion engine 8, the measure of the surface temperature is determined in step 1. The result of the determination is compared with the threshold value for the pre-ignition tendency and in step 2 it is checked whether this limit value is met. If limit value 5 is adhered to, process 4 ends. If limit value 6 is not adhered to, measures against pre-ignition are initiated in step 3, thereby reducing the risk of pre-ignition or preventing pre-ignition altogether.
  • a vehicle according to the invention 9 is shown partially schematically, which is cut in the front area.
  • a control unit 7 In the front area of the vehicle 9 are a control unit 7 and an internal combustion engine 8.
  • the method according to the invention is implemented in the control unit 7 as a function.
  • the measures are initiated on the drive train through which finally the pre-ignition can be avoided.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP13154307.6A 2012-03-15 2013-02-07 Procédé destiné à empêcher le préallumage d'un mélange air-carburant dans une chambre de cylindre d'un moteur à combustion interne Active EP2639433B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012005227A DE102012005227A1 (de) 2012-03-15 2012-03-15 Verfahren zur Verhinderung einer Vorentflammung eines Kraftstoff-Luft-Gemisches in einem Zylinderraum einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP2639433A1 true EP2639433A1 (fr) 2013-09-18
EP2639433B1 EP2639433B1 (fr) 2017-06-14

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EP13154307.6A Active EP2639433B1 (fr) 2012-03-15 2013-02-07 Procédé destiné à empêcher le préallumage d'un mélange air-carburant dans une chambre de cylindre d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP2639433B1 (fr)
CN (1) CN103306837B (fr)
DE (1) DE102012005227A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3109449A4 (fr) * 2014-02-20 2017-09-27 Hitachi Automotive Systems, Ltd. Dispositif de commande de moteur
US11034912B2 (en) 2014-04-29 2021-06-15 Infineum International Limited Lubricating oil compositions

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10196998B2 (en) * 2014-08-21 2019-02-05 GM Global Technology Operations LLC Engine emission control system including combustion chamber temperature monitoring system
DE102014222527A1 (de) * 2014-11-05 2016-05-12 Robert Bosch Gmbh Verfahren und Vorrichtung zur Vermeidung von unkontrollierten Verbrennungen in einer Brennkraftmaschine
DE102016221448B4 (de) * 2016-11-02 2018-10-18 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Reduktion von Vorentflammungen
DE102021116045A1 (de) 2021-06-22 2022-12-22 Bayerische Motoren Werke Aktiengesellschaft Kolbenbodenkühlverfahren, Steuereinheit zum Durchführen des Verfahrens, Kolbenbodenkühleinrichtung, Verbrennungskraftmaschine mit einer Kolbenbodenkühleinrichtung sowie Kraftfahrzeug

Citations (9)

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Publication number Priority date Publication date Assignee Title
WO1999042718A1 (fr) * 1998-02-23 1999-08-26 Cummins Engine Company, Inc. Moteur a allumage par compression d'une charge prealablement melangee, et a reglage optimal de la combustion
US20060207562A1 (en) * 2005-03-18 2006-09-21 Toyota Jidosha Kabushiki Kaisha Control apparatus for internal combustion engine
US20070215107A1 (en) * 2006-03-17 2007-09-20 Shelby Michael H Pre-ignition detection and mitigation
DE102008003581A1 (de) * 2008-01-09 2009-08-13 Continental Automotive Gmbh Verfahren und Vorrichtung zur Verringerung der Abgastemperatur bei einem Kraftfahrzeug
DE102008038102A1 (de) 2008-08-18 2010-03-25 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Verfahren zur Verhinderung einer Vorentflammung eines Kraftstoff-Luft-Gemisches in einem Zylinderraum einer ottomotorisch betriebenen Brennkraftmaschine mit hohem Verdichtungsverhältnis
DE102010064186A1 (de) 2010-03-25 2011-09-29 Robert Bosch Gmbh Verfahren und Vorrichtung zur Behandlung von unkontrollierten Verbrennungen in einem Verbrennungsmotor eines Kraftfahrzeuges
DE102010003305A1 (de) * 2010-03-25 2011-09-29 Bayerische Motoren Werke Aktiengesellschaft Vermeidung irregulärer Verbrennung in einem Verbrennungsmotor
US20110313641A1 (en) * 2011-08-03 2011-12-22 Ford Global Technologies, Llc Method and system for pre-ignition control
US20120029789A1 (en) * 2010-04-30 2012-02-02 Southwest Research Institute Methods of detecting pre-ignition and preventing it from causing knock in direct injection spark ignition engines

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JP3912032B2 (ja) * 2001-05-16 2007-05-09 日産自動車株式会社 筒内直接噴射式エンジンの制御装置
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Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999042718A1 (fr) * 1998-02-23 1999-08-26 Cummins Engine Company, Inc. Moteur a allumage par compression d'une charge prealablement melangee, et a reglage optimal de la combustion
US20060207562A1 (en) * 2005-03-18 2006-09-21 Toyota Jidosha Kabushiki Kaisha Control apparatus for internal combustion engine
US20070215107A1 (en) * 2006-03-17 2007-09-20 Shelby Michael H Pre-ignition detection and mitigation
DE102008003581A1 (de) * 2008-01-09 2009-08-13 Continental Automotive Gmbh Verfahren und Vorrichtung zur Verringerung der Abgastemperatur bei einem Kraftfahrzeug
DE102008038102A1 (de) 2008-08-18 2010-03-25 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Verfahren zur Verhinderung einer Vorentflammung eines Kraftstoff-Luft-Gemisches in einem Zylinderraum einer ottomotorisch betriebenen Brennkraftmaschine mit hohem Verdichtungsverhältnis
DE102010064186A1 (de) 2010-03-25 2011-09-29 Robert Bosch Gmbh Verfahren und Vorrichtung zur Behandlung von unkontrollierten Verbrennungen in einem Verbrennungsmotor eines Kraftfahrzeuges
DE102010003305A1 (de) * 2010-03-25 2011-09-29 Bayerische Motoren Werke Aktiengesellschaft Vermeidung irregulärer Verbrennung in einem Verbrennungsmotor
US20120029789A1 (en) * 2010-04-30 2012-02-02 Southwest Research Institute Methods of detecting pre-ignition and preventing it from causing knock in direct injection spark ignition engines
US20110313641A1 (en) * 2011-08-03 2011-12-22 Ford Global Technologies, Llc Method and system for pre-ignition control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3109449A4 (fr) * 2014-02-20 2017-09-27 Hitachi Automotive Systems, Ltd. Dispositif de commande de moteur
US10233799B2 (en) 2014-02-20 2019-03-19 Hitachi Automotive Systems, Ltd. Engine control device
US11034912B2 (en) 2014-04-29 2021-06-15 Infineum International Limited Lubricating oil compositions

Also Published As

Publication number Publication date
CN103306837B (zh) 2017-04-12
CN103306837A (zh) 2013-09-18
EP2639433B1 (fr) 2017-06-14
DE102012005227A1 (de) 2013-09-19

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