WO2015195041A1 - Procédé de détection d'alimentation en carburant indésirable dans un moteur à combustion interne - Google Patents

Procédé de détection d'alimentation en carburant indésirable dans un moteur à combustion interne Download PDF

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Publication number
WO2015195041A1
WO2015195041A1 PCT/SE2015/050708 SE2015050708W WO2015195041A1 WO 2015195041 A1 WO2015195041 A1 WO 2015195041A1 SE 2015050708 W SE2015050708 W SE 2015050708W WO 2015195041 A1 WO2015195041 A1 WO 2015195041A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
engine
gas pressure
fuel supply
combustion
Prior art date
Application number
PCT/SE2015/050708
Other languages
English (en)
Inventor
Ola Stenlåås
Mikael Nordin
Original Assignee
Scania Cv Ab
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 Scania Cv Ab filed Critical Scania Cv Ab
Priority to DE112015002206.6T priority Critical patent/DE112015002206T5/de
Publication of WO2015195041A1 publication Critical patent/WO2015195041A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
    • F02D35/024—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure using an estimation
    • 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
    • F02D2200/025—Engine noise, e.g. determined by using an acoustic sensor
    • 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
    • F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F02D9/06—Exhaust brakes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/08—Testing internal-combustion engines by monitoring pressure in cylinders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to a method for detecting unwanted fuel supply, or a risk of unwanted fuel supply, to at least one cylinder in a combustion engine and a device for detecting unwanted fuel supply.
  • the invention also relates to a computer program and a computer program product comprising computer program code for the implementation of a method according to the invention, and an electronic control device and a motor vehicle.
  • Unwanted fuel supply may occur in the form of fuel from an ordinary fuel supply system in the combustion engine, which fuel is supplied at the wrong time, or in the form of, for example, combustion gases originating from a crank house ventilation mechanism in the engine. Unwanted fuel may also be supplied to the cylinder as a result of too much engine oil being sucked into the cylinder's combustion chamber, via the column between the piston and the cylinder wall, which produces a so-called oil coating. Oil coating may, in addition to causing soot and coke in the combustion chamber, also lead to self-propelling of the engine, whereat the oil burns to such an extent that the engine may revolve and thus pull in even more oil.
  • US 201 1 /0238283 describes a method to detect uncontrolled combustion in a cylinder of a combustion engine as a consequence of, for example, oil drops in the combustion chamber.
  • a pressure sensor fitted in the cylinder is used to detect a pressure in the cylinder, which is compared with a reference pressure.
  • the objective of the present invention is to provide a, in at least some aspect improved, manner of detecting unwanted fuel supply, or a risk of unwanted fuel supply, to one or more cylinders in a combustion engine.
  • a method for detection of unwanted fuel supply, or a risk of unwanted fuel supply, to at least one cylinder in a combustion engine.
  • the method comprises:
  • the detection of the gas pressure is carried out by detecting movements generated by said gas pressure change in a cylinder head belonging to said cylinder or in parts adjacent thereto in the engine.
  • the innovative method it is thus possible to discover early on, whether the gas pressure in the cylinder is such that there is either unwanted fuel supply or a risk of unwanted fuel supply. Accordingly, it is possible to control the engine's operating conditions early on, so that the risk of coke and soot in the combustion chamber and the more serious risk of self-propelling is reduced.
  • the innovative method also has the advantage that it may be carried out without any holes for pressure sensors having to be bored in the combustion chamber. In addition to a cost saving thus achieved, thanks to the invention disruptions that may be caused by t pressure sensors fitted in the cylinder chamber are also avoided.
  • the innovative method is used to detect unwanted fuel supply, or a risk of unwanted fuel supply, in the form of engine oil to the cylinder, but the method may also be used to detect other unwanted fuel supply, in the form of, for example, combustion gases from the crank house or fuel from an ordinary fuel supply system, which is supplied at the wrong time or in the wrong amount.
  • the movements which may be detected with the innovative method, and which are generated by pressure changes in a combustion chamber may for example be vibrations, noise, that is to say gas movements, and various types of shape changes, such as protrusions, in said cylinder head or in parts adjacent thereto in the engine.
  • movements in the form of vibrations are detected. It has been shown that the pressure changes that arise during the operation of the cylinder in the combustion chamber in turn give rise to vibrations in the cylinder head and in adjacent parts in the engine. By reading these vibrations, a measured value of the pressure changes in the combustion chamber is obtained in a reliable manner.
  • movements in the form of strains in screws of the engine are detected, such as screws in main bearings or in connecting rod bearings, and in cylinder head bolts.
  • the appearance of such movements depends on pressure changes in the combustion chamber, and may for example be detected by applying strain-sensors on such screws.
  • movements in the form of strains in an engine block part or in a cylinder head of the engine are detected, and according to another embodiment of the invention, movements in the form of strains in the injector- or glow plug fixings are detected.
  • the detection of the gas pressure is done by detecting movements with a frequency of ⁇ 250 Hz, 0.5 Hz-250 Hz or 0.5 Hz-200 Hz.
  • the movements detected are thus movements with a relatively low frequency, and the basic frequency of the variation of the gas pressure in the combustion chamber, which is the same as the combustion engine's engine speed, lies within these intervals.
  • this may be 60 revolutions per minute (1 Hz) for a marine diesel engine and as high as 12 000 revolutions per minute (approximately 200 Hz) for an otto engine in a motorbike.
  • the step of detecting the gas pressure is carried out in such a manner that the gas pressure detected is the gas pressure during a working cycle of the cylinder, when no fuel is supplied to the latter via an ordinary fuel supply system in the combustion engine.
  • the gas pressure detected is the gas pressure during a working cycle of the cylinder, when no fuel is supplied to the latter via an ordinary fuel supply system in the combustion engine.
  • the embodiment is advantageous also in the case, when there is no unwanted combustion, since it may be determined in a simple manner whether the gas pressure is at a normal level during a working cycle without fuel supply.
  • the step of detecting the gas pressure is carried out in such a manner that the gas pressure detected is the gas pressure during at least one compression and/or expansion stroke of the cylinder.
  • the gas pressure detected is the gas pressure during at least one compression and/or expansion stroke of the cylinder.
  • the method comprises the steps:
  • an error signal may be generated in the form of, for example, an electronic message, an audio and/or light signal, or alternatively some other measure may be carried out, such as a control of the engine's operating conditions.
  • a first alarm criterion is set so that it is met, if the gas pressure in the combustion chamber falls short of a value determined for the relevant operating condition of the engine.
  • a low gas pressure indicates that there is a risk of unwanted fuel supply in the form of engine oil from the oil sump, which may occur if there is a low gas pressure in the combustion chamber, and in particular if, at the same time, there are leaking gaskets or the pressure in the oil sump is elevated.
  • a low gas pressure in the cylinder then means that more engine oil follows the cylinder's piston into the combustion chamber, where there is a risk that it may form soot or coke and, in the worst case, lead to self-propelling.
  • the method comprises the step, based on said alarm, of controlling the gas pressure in the cylinder to a higher level.
  • a throttle valve controlling the inflow of air to an inlet channel to the cylinder may be opened, which increases the flow of air through the cylinder, and thus also the gas pressure in the combustion chamber.
  • a second alarm criterion is set so that it is met, if there is combustion in the combustion chamber during a working cycle of the cylinder, whereat no fuel is supplied to the cylinder via an ordinary fuel supply system. This indicates that there is unwanted fuel supply to the system, and an investigation of the cause thereof may be initiated and the error may be corrected when an alarm is generated.
  • the second alarm criterion is set in such a manner that it is met, if the gas pressure in the combustion chamber during a compression and/or an expansion stroke of the cylinder exceeds a value determined for the relevant operating condition of the engine. This is a simple way of detecting whether there is combustion during a compression and/or expansion stroke, when there should be no combustion.
  • Alternative ways of detecting whether there is combustion include comparing a gas pressure gradient during a compression and/or expansion stroke with a gradient determined for the relevant operating condition, since combustion in the cylinder gives rise to larger gradients compared to an expansion stroke when the engine is dragged, i.e. turned around by external forces without any combustion occurring.
  • the method comprises the step, based on said alarm, of activating an exhaust brake in the combustion engine.
  • the ordinary fuel supply to the combustion engine is constricted.
  • Other measures, such as closure of valves, increased exhaust gas recirculation (EGR) etc. may also be taken to prevent self-propelling.
  • the above mentioned objective is achieved via a device adapted to detect unwanted fuel supply, or a risk of unwanted fuel supply, to at least one cylinder in a combustion engine, characterised in that it comprises at least one sensor element, adapted to be arranged separately from the cylinder's combustion chamber on a part of a cylinder head belonging to the cylinder or on adjacent parts of the engine, and adapted to detect movements of said cylinder head or of adjacent parts in the engine generated by changes in said gas pressure, and in that it also comprises a device adapted, based on the detected movements, to determine the gas pressure and to compare this with expected values for the relevant operating condition of the engine, and based on the comparison to determine whether there is unwanted fuel supply.
  • the invention also relates to a computer program, a computer program product, an electronic control device, and a motor vehicle which uses the above.
  • the invention is not limited to any specific type of combustion engine, but encompasses Otto engines as well as compression ignited engines, nor to any specific fuel, non-exhaustive examples of which may comprise fuel in the form of petrol, ethanol, diesel and gas.
  • An ordinary fuel supply system in the vehicle may thus be for example a system, where an air- and fuel-mixture is supplied to the cylinder via an inlet channel, or one where the fuel is injected separately.
  • the invention comprises combustion engines intended for all types of use, such as in industrial applications, in crushing machines and various types of motor vehicles, wheeled motor vehicles as well as trucks and buses, and boats and crawlers or similar vehicles.
  • FIG. 1 is a schematic view illustrating a part of a combustion engine, in which a device according to one embodiment of the invention is arranged, shows a possible location of a sensor element
  • FIG. 2 is a diagram which schematically shows the gas pressure in the combustion chamber of a cylinder in a combustion engine as a function of time during a working cycle of the cylinder with and without combustion, respectively,
  • Fig. 3 is a flow chart showing a method according to one embodiment of the invention.
  • Fig. 4 is a fundamental diagram of an electronic control device for the implementation of a method according to the invention. DETAILED DESCRIPTION OF EMBODIMENTS ACCORDING TO THE INVENTION
  • Fig. 1 a illustrates very schematically a combustion engine 1 , in which a device for detection of unwanted fuel supply, or a risk of unwanted fuel supply, according to one embodiment of the invention is arranged.
  • the combustion engine is arranged in an implied motor vehicle 2, for example a truck.
  • the engine 1 is equipped with a device 3, indicated with a dashed line, adapted to detect operating conditions in the engine, and such device has a schematically drawn device 4, which is adapted to detect the pressure in the combustion chambers 5 of the combustion engine's cylinders 6, of which there are six in this case, but of which there may be any number.
  • Each cylinder 6 comprises a piston 14, arranged to operate a crankshaft 12, an inlet valve 10, controlling the gas in-flow from an inlet channel 15 to the cylinder's combustion chamber 5, and an exhaust valve 1 1 , controlling the outflow of exhausts via an exhaust channel 16.
  • a pressure sensor 17 is arranged in the inlet channel 15.
  • a throttle- valve (not displayed) may be arranged upstream of the pressure sensor 17, in order to control the air inflow into the inlet channel 15.
  • the device 4 has, in order to be able to detect said pressures in the combustion chambers 5, one sensor element 7 per cylinder 6, and this is arranged separately from the associated combustion chamber 5 on the respective cylinder's cylinder head 8.
  • the sensor elements 7 in this case are piezo resistive sensors, adapted to detect movements generated by pressure changes in the relevant combustion chambers 5, which movements propagate in the cylinder head 8.
  • the movements may, for example, be in the form of vibrations.
  • the device 3 also comprises a unit 9, which may consist of the vehicle's electronic control device, adapted to receive information about the detected movements from the sensor elements 7, and to compare such information, or information calculated based on such sensor information, with values stored in relation to the desired operating conditions in the engine.
  • a unit 9 which may consist of the vehicle's electronic control device, adapted to receive information about the detected movements from the sensor elements 7, and to compare such information, or information calculated based on such sensor information, with values stored in relation to the desired operating conditions in the engine.
  • Fig. 1 b shows another placement of the sensor element 7.
  • the sensor element is here placed on a section adjacent to the cylinder head.
  • the sensor element is placed on the engine, specifically on the engine block.
  • the sensor elements/sensors 7 may be of a suitable type, e.g. piezo resistive or piezo electrical elements or optical sensors.
  • the sensor element may here be placed on the engine, in an area adjacent to the outlet of the exhaust channel from a cylinder. For example on a surface on the engine block next to the outlet, on the engine, of the exhaust channel from a cylinder.
  • the surface where the sensor 7 is placed may be substantially vertical.
  • the sensor may be arranged to detect movements, which are perpendicular to the movements of the piston.
  • the sensor may also be arranged to detect movements, which are perpendicular both in relation to the piston's direction of movement and in relation to the engine's longitudinal direction.
  • the sensor is located on the engine's long side.
  • the sensor may be arranged to detect movements in a direction, which is perpendicular in relation to the surface on which it is placed.
  • the sensor element 7 may be placed in a corresponding manner as when placed on the engine at the outlet of the exhaust channel from a cylinder, but instead placed in a corresponding location on the engine, at the inlet channel's inlet to a cylinder.
  • the signal detected by the sensor element 7 may be treated in various ways. For example, the following signal treatment steps may be carried out. First the sensor's electrical signal is entered into a control device/signal treatment device. The signal is filtered with a bandpass filter in order to remove superfluous information, which does not belong to the frequency range around which information is required. The signal is evened out by way of filtering, averaging or by being replaced with one or several continuous function(s) with good likeness. Subsequently, the signal is scaled, e.g. with the help of the correlation between pressure and volume at compression. Subsequently, (a) suitable part(s) of the signal is/are transformed to the pressure domain.
  • FIG. 2 schematically shows a diagram of the gas pressure in the combustion chamber 5 of a cylinder 6 as a function of time t during a part of a working cycle of the cylinder corresponding to a compression stroke, when the piston 14 moves from its bottom dead centre BDC to its top dead centre TDC, and a subsequent expansion stroke, when the piston 14 moves from the top dead centre TDC to the bottom dead centre BDC.
  • the gas pressure P1 in the absence of combustion in the cylinder is shown as a solid line, and the gas pressure P2 at combustion in the cylinder is shown during the expansion stroke as a dashed line. As shown, at combustion the gas pressure in the combustion chamber 5 is at a higher level than in the absence of combustion.
  • a step S1 movements of the cylinder head 8 are detected with the help of the sensor element 7 during a working cycle of the cylinder.
  • the detection takes place during a working cycle when no fuel is supplied to the cylinder via an ordinary fuel supply system, that is to say when the engine is dragged.
  • the signal from the sensor element 7 is converted by the control device 9 in a step S2, into a gas pressure in the combustion chamber.
  • a signal from the pressure sensor 17 in the inlet channel 15 may be used.
  • the calculated gas pressure is then compared with one or several alarm criteria.
  • a first alarm criterion is set in such a manner that it is deemed met, if the gas pressure at a given occasion in the cylinder falls short of a value determined for the relevant occasion.
  • This first alarm criterion is thus set in such a manner that it is met if the gas pressure in the combustion chamber is so low that it may lead to oil coating on the cylinder.
  • an alarm may be set in step S4a.
  • the gas pressure in the combustion chamber 5 may then be controlled to a higher level, for example by opening the throttle valve that controls the air supply to the inlet channel 15, and thus to the combustion chamber. The result is that the air flow, and thus also the gas pressure in the combustion chamber, increases. The risk of oil coating may therefore be eliminated.
  • a second alarm criterion is set in such a manner that it is met if the gas pressure in the combustion chamber 5, at a given point in time during an expansion stroke of the cylinder 6, exceeds a value determined for the relevant point in time.
  • This second alarm criterion is thus set in such a manner that it is met, if there is a combustion in the combustion chamber without any supply of fuel from an ordinary fuel supply system in the combustion engine. If the second alarm criterion is met, there is a risk of self- propelling of the combustion engine, for example because the piston 14 pulls in sufficient amounts of engine oil into the combustion chamber 5 for the engine to be able to turn with the engine oil as fuel, without any ordinary fuel supply.
  • step S4b If the second alarm criterion is met, an alarm is set in a step S4b, based upon which an exhaust brake in the engine is activated in step S6, at the same time as the ordinary fuel supply is stopped. In this manner, it is possible to interrupt self-propelling at an early stage. If no alarm criterion is met, no measure is taken.
  • the detection of the gas pressure in the combustion engine 5 occurs separately for the respective cylinder 6 in the combustion engine. It is then possible to determine directly in which cylinder 6 there are potential problems. This is especially applicable in multi-cylinder combustion engines, where each cylinder 6 has a separate cylinder head 8, as displayed in Fig. 1 .
  • the detection may occur either separately or jointly, but with a joint detection some information is lost, relating to the cylinder to which unwanted fuel supply occurs.
  • a computer program code for the implementation of a method according to the invention is suitably included in a computer program, loadable into the internal memory of a computer, such as the internal memory of an electronic control device of a combustion engine.
  • a computer program is suitably provided via a computer program product, comprising a data storage medium readable by an electronic control device, which data storage medium has the computer program stored thereon.
  • Said data storage medium is e.g. an optical data storage medium in the form of a CD-ROM, a DVD, etc., a magnetic data storage medium in the form of a hard disk drive, a diskette, a cassette, etc., or a Flash memory or a ROM, PROM, EPROM or EEPROM type memory.
  • Fig. 4 very schematically illustrates an electronic control device 9 comprising execution means 20, such as a central processor unit (CPU), for the execution of computer software.
  • the execution means 20 communicates with a memory 21 , e.g. a RAM memory, via a data bus 22.
  • the control device 9 also comprises a data storage medium 23, e.g. in the form of a Flash memory or a ROM, PROM, EPROM or EEPROM type memory.
  • the execution means 20 communicates with the data storage means 23 via the data bus 22.
  • a computer program comprising computer program code for the implementation of a method according to the invention is stored on the data storage medium 23.

Abstract

L'invention concerne un procédé et un dispositif pour détecter une alimentation en carburant indésirable, ou un risque d'alimentation en carburant indésirable, à au moins un cylindre dans un moteur à combustion interne. Le procédé comprend les étapes consistant : - au cours d'au moins une partie d'un cycle de travail du cylindre, à détecter la pression de gaz dans une chambre de combustion du cylindre ; - à comparer la pression de gaz détectée avec des valeurs attendues pour des conditions de fonctionnement adéquates du moteur ; et - sur la base de ladite comparaison, à déterminer s'il y a présence d'une alimentation en carburant indésirable ou d'un risque d'alimentation en carburant indésirable. La détection de la pression de gaz est effectuée par la détection de mouvements engendrés par des changements dans ladite pression de gaz dans une culasse appartenant audit cylindre ou dans des pièces adjacente à cette dernière dans le moteur.
PCT/SE2015/050708 2014-06-17 2015-06-16 Procédé de détection d'alimentation en carburant indésirable dans un moteur à combustion interne WO2015195041A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112015002206.6T DE112015002206T5 (de) 2014-06-17 2015-06-16 Verfahren und Erfassen von unerwünschter Kraftstoffzufuhr in einem Verbrennungsmotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1450751 2014-06-17
SE1450751-1 2014-06-17

Publications (1)

Publication Number Publication Date
WO2015195041A1 true WO2015195041A1 (fr) 2015-12-23

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PCT/SE2015/050708 WO2015195041A1 (fr) 2014-06-17 2015-06-16 Procédé de détection d'alimentation en carburant indésirable dans un moteur à combustion interne

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Country Link
DE (1) DE112015002206T5 (fr)
WO (1) WO2015195041A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130238A1 (de) * 1981-07-31 1983-02-17 Daimler-Benz Ag, 7000 Stuttgart "drucksensor fuer brennkraftmaschinen"
US4606312A (en) * 1984-07-31 1986-08-19 Kawasaki Jukogyo Kabushiki Kaisha System for detecting abnormalities in gas engines
GB2314882A (en) * 1996-06-24 1998-01-14 Cummins Engine Co Inc Controlling fuel supply to i.c. engine using cylinder pressure measurements derived from strain gauge in cylinder head bolt
US20020066437A1 (en) * 2000-12-05 2002-06-06 Detroit Diesel Corporation Method and system for enhanced engine control based on cylinder pressure
EP1860304A1 (fr) * 2005-03-18 2007-11-28 Toyota Jidosha Kabushiki Kaisha Dispositif de commande d un moteur à combustion interne et procédé d épuration des gaz d échappement
US20080228341A1 (en) * 2007-03-15 2008-09-18 Murad Orifij Vehicle diagnosis system and method
US20110238283A1 (en) * 2010-03-25 2011-09-29 Robert Bosch Gmbh Method and apparatus for reducing uncontrolled combustion in an internal combustion engine
CA2809291A1 (fr) * 2013-03-12 2013-05-21 Westport Power Inc. Diagnostics de systeme de carburant

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130238A1 (de) * 1981-07-31 1983-02-17 Daimler-Benz Ag, 7000 Stuttgart "drucksensor fuer brennkraftmaschinen"
US4606312A (en) * 1984-07-31 1986-08-19 Kawasaki Jukogyo Kabushiki Kaisha System for detecting abnormalities in gas engines
GB2314882A (en) * 1996-06-24 1998-01-14 Cummins Engine Co Inc Controlling fuel supply to i.c. engine using cylinder pressure measurements derived from strain gauge in cylinder head bolt
US20020066437A1 (en) * 2000-12-05 2002-06-06 Detroit Diesel Corporation Method and system for enhanced engine control based on cylinder pressure
EP1860304A1 (fr) * 2005-03-18 2007-11-28 Toyota Jidosha Kabushiki Kaisha Dispositif de commande d un moteur à combustion interne et procédé d épuration des gaz d échappement
US20080228341A1 (en) * 2007-03-15 2008-09-18 Murad Orifij Vehicle diagnosis system and method
US20110238283A1 (en) * 2010-03-25 2011-09-29 Robert Bosch Gmbh Method and apparatus for reducing uncontrolled combustion in an internal combustion engine
CA2809291A1 (fr) * 2013-03-12 2013-05-21 Westport Power Inc. Diagnostics de systeme de carburant

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