EP0684377A1 - Elektronisches System zur Hubidentifizierung eines Innenverbrennungsmotors - Google Patents
Elektronisches System zur Hubidentifizierung eines Innenverbrennungsmotors Download PDFInfo
- Publication number
- EP0684377A1 EP0684377A1 EP95107845A EP95107845A EP0684377A1 EP 0684377 A1 EP0684377 A1 EP 0684377A1 EP 95107845 A EP95107845 A EP 95107845A EP 95107845 A EP95107845 A EP 95107845A EP 0684377 A1 EP0684377 A1 EP 0684377A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strokes
- engine
- cylinder
- crankshaft
- torque
- 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.)
- Withdrawn
Links
Images
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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
Definitions
- the present invention relates to an electronic system for identifying the strokes of an internal combustion engine.
- a microprocessor-based electronic controller receives at its input a plurality of data signals (for example, the engine speed, the throttle position, the intake air temperature, the cooling water temperature, etc.), and generates at its output the injection stroke and time for the different injectors.
- a microprocessor-based electronic controller receives at its input a plurality of data signals (for example, the engine speed, the throttle position, the intake air temperature, the cooling water temperature, etc.), and generates at its output the injection stroke and time for the different injectors.
- Multipoint one injector per cylinder
- stroke-dependent the fuel is injected in the suction stroke
- angular reference systems permitting the recognition of the engine stroke (suction, compression, expansion, exhaust) in the different cylinders of the engine.
- the known angular reference systems use two sensors of the angular position of the engine: a first sensor which can supply a signal of the angular position of the crankshaft (with an interval of 360°) and a second sensor (with an interval of 720 ° ) which can supply a signal of the angular position of the camshaft.
- the first angular position sensor conveniently consists of a toothed pulley keyed to the crankshaft and a fixed sensor which can supply a pulse at the moment in which one tooth of the pulley passes in front of the fixed sensor.
- the toothed pulley also has a flattened portion, formed for example by the omission of two teeth, which is used as a zero reference for identifying the upper dead centres of the different cylinders of the engine.
- the upper dead centre of each cylinder of the engine is found, with an indeterminacy of 3600, in a specified angular position with respect to the zero reference.
- the upper dead centres of the different cylinders are therefore identified by counting specified numbers of pulses following the detection of the zero reference.
- the second sensor consists of a toothed pulley keyed to the camshaft and a fixed sensor which can supply at its output a first signal level corresponding to a first zero reference detected by the first sensor and a second signal level corresponding to a subsequent detection of the zero reference.
- the second sensor is used to eliminate the 360 ° indeterminacy of the first sensor.
- the known systems also have electronic controllers which receive the signals generated by the first and second sensors and process them to obtain the data on the engine strokes (suction, compression, expansion, exhaust) of the different cylinders.
- the known angular reference systems entail a considerable complexity of construction and high costs.
- the processing of the signals generated by the two sensors is also complex.
- the object of the present invention is to provide an electronic system for identifying the strokes of an internal combustion engine which resolves the problems of the known systems.
- the object of the present invention is to provide an electronic system for identifying the strokes of an engine which uses only one angular position sensor.
- the above object is achieved by the present invention in that it relates to an electronic system for identifying the strokes of a four-stroke internal combustion engine
- Figure 1 shows a four-stroke internal combustion engine 2 operating in an Otto cycle, provided with an injection device 4 controlled by an electronic controller 7 operating according to the electronic system of stroke identification according to the present invention.
- the electronic controller 7 receives a plurality of signals S1, S2, ... Sn of input data collected in the engine 2 (for example, signals proportional to the engine coolant temperature, to the intake air temperature, to the throttle position, etc.) and generates at the output a plurality of injection times Tj supplied to the injection device 4.
- a plurality of signals S1, S2, ... Sn of input data collected in the engine 2 for example, signals proportional to the engine coolant temperature, to the intake air temperature, to the throttle position, etc.
- the injection device 4 is provided with four injectors 4a, 4b, 4c, 4d operating with corresponding cylinders 9a, 9b, 9c, 9d (shown schematically) of the engine 2 ("Multipoint" system) and can inject the fuel into one cylinder at a time (sequential system) and in the suction stroke (timed system).
- the electronic controller 7 is provided with an engine stroke reference unit 11 permitting recognition of the engine stroke (suction, compression, expansion, exhaust) in each cylinder 9a, 9b, 9c, 9d of the engine 2.
- the reference unit 11 receives at its input a signal from a sensor 15 coupled to a toothed pulley 17 keyed to one end of the crankshaft 20 of the engine 2.
- the sensor 15 can generate an electrical pulse when one tooth of the pulley 17 passes in front of the sensor 15.
- the toothed pulley 17 is provided with sixty teeth, with the omission of two, and therefore has a flattened portion formed by the omission of these two teeth, which is used as the zero reference.
- the zero reference is used to identify the upper dead centres of the different cylinders of the engine.
- the upper dead centre of each cylinder 4a, 4b, 4c, 4d is found, with an indeterminacy of 360°, in a specified angular position aa, ab, ac, ad with respect to the zero reference.
- the signal R generated by the sensor 15 consists of a sequence of pulses Di equally spaced by an interval t.
- the signal R also has a flat portion Dz of width T (equal to approximately three times t) in which pulses cannot be detected; this flat portion Dz is produced during the passage of the flattened portion in front of the sensor 15.
- the upper dead centre of each cylinder is identified with the said indeterminacy of 360 ° by counting a specified number of pulses Na, Nb, Nc, Nd after the detection of the zero reference.
- the zero reference when the zero reference is detected it is not possible to identify the timing of the different cylinders 9a, 9b, 9c, 9d in a unique way, since the interval of the engine 2, operating in the Otto cycle, is 720 ° of the rotation of the crankshaft and the interval of the signal generated by the sensor 15 is 360 ° of the rotation of the crankshaft. Consequently it is not possible to know whether the 360 ° following the zero reference coincide with the first 360 ° of the cycle or with the final 360 ° of the engine cycle. It is therefore not possible to know whether the first specified angular position aa following the zero reference corresponds to the upper dead centre of the first cylinder 9a or to that of the fourth cylinder 9d of the engine 2.
- the reference unit 11 also interacts with a device 25, for example the device described in French Patent FR-9111273 with the title "process and device for measuring the torque of an internal combustion engine", capable of measuring the instantaneous torque developed individually by the different cylinders of the engine 2.
- the unit 11 generates at its output a signal which describes the engine strokes (suction, compression, expansion, exhaust) of each cylinder 9a, 9b, 9c, 9d of the engine 2.
- the first block encountered is the block 100 in which the system detects the signal R generated by the sensor 15.
- the system is prepared to await the flat portion Dz of the signal R in order to identify the zero reference of the pulley 17. Detection of the zero reference results in a passage from the block 100 to a block 110.
- the block 110 arbitrarily assigns the strokes of the engine 2, assigning, for example, the upper dead centre of the first cylinder 9a to the first specified angular position aa following the zero reference; the assignation of the positions of the upper dead centres of the other cylinders is carried out in a way compatible with the first assignation.
- the angular position aa of the upper dead centre of the first cylinder 9a is recognized after detection of a specified number (for example twenty) of pulses Na following the zero reference.
- the angular position found on the twentieth pulse following the zero reference may also correspond to the upper dead centre of the fourth cylinder 9d.
- the block is followed by a block 130 which detects an error in the assignation of the strokes determined by the block 110 (mistiming by 3600) and consequently retimes the injection.
- the block 130 comprises a block 131 which eliminates the fuel injection to an injector, in particular the injector which injects fuel into the first cylinder 9a.
- the block 131 is followed by a wait block 132.
- the block 132 is followed by a block 133 in which the torque applied to the crankshaft by the cylinder recognized by the block 110 as the first cylinder 9a is measured by a known method by the device 25.
- the interruption of the supply of the block 131 is followed by a lack of application of torque in the instant in which the upper dead centre is assumed to be present in the said first cylinder.
- the timing carried out by the block 110 is correct and passes from the block 133 to a block 134.
- the decrease in torque may be measured, for example, by comparing the instantaneous torque measured by the device 25 with the torque measured in preceding engine cycles.
- the block 135 retimes by 360 the timing set in the block 110; consequently, the upper dead centre of the fourth cylinder 9d (whose position is displaced by 360 ° with respect to that of the first cylinder) is assigned to the first angular position of the shaft 20 following the detection of a specified number of pulses Na (for example, twenty) from the zero reference.
- the block 134 maintains the timing determined by the block 110.
- the blocks 134 and 135 lead to the exit from the program.
Landscapes
- 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)
- Testing Of Engines (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO940238 | 1994-05-23 | ||
IT94BO000238A ITBO940238A1 (it) | 1994-05-23 | 1994-05-23 | Sistema elettronico di identificazione delle fasi di un motore endotermico |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0684377A1 true EP0684377A1 (de) | 1995-11-29 |
Family
ID=11339844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95107845A Withdrawn EP0684377A1 (de) | 1994-05-23 | 1995-05-22 | Elektronisches System zur Hubidentifizierung eines Innenverbrennungsmotors |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0684377A1 (de) |
IT (1) | ITBO940238A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2754852A1 (fr) * | 1996-10-18 | 1998-04-24 | Renault | Procede de synchronisation du systeme electronique de commande de moteur a combustion interne |
WO2000019077A1 (de) * | 1998-09-30 | 2000-04-06 | Robert Bosch Gmbh | Einrichtung zur phasenerkennung |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4870587A (en) * | 1986-11-28 | 1989-09-26 | Honda Giken Kogyo Kabushiki Kaisha | Method of discriminating a stroke of a 4-cycle internal combustion engine |
EP0576334A1 (de) * | 1992-06-23 | 1993-12-29 | Regie Nationale Des Usines Renault S.A. | Verfahren zur Zylinderidentifikation für die Steuerung eines elektronischen Einspritzsystems eines Verbrennungsmotors |
DE4229773A1 (de) * | 1992-09-05 | 1994-03-10 | Bosch Gmbh Robert | Verfahren zur Zylindererkennung von Brennkraftmaschinen |
-
1994
- 1994-05-23 IT IT94BO000238A patent/ITBO940238A1/it unknown
-
1995
- 1995-05-22 EP EP95107845A patent/EP0684377A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4870587A (en) * | 1986-11-28 | 1989-09-26 | Honda Giken Kogyo Kabushiki Kaisha | Method of discriminating a stroke of a 4-cycle internal combustion engine |
EP0576334A1 (de) * | 1992-06-23 | 1993-12-29 | Regie Nationale Des Usines Renault S.A. | Verfahren zur Zylinderidentifikation für die Steuerung eines elektronischen Einspritzsystems eines Verbrennungsmotors |
DE4229773A1 (de) * | 1992-09-05 | 1994-03-10 | Bosch Gmbh Robert | Verfahren zur Zylindererkennung von Brennkraftmaschinen |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2754852A1 (fr) * | 1996-10-18 | 1998-04-24 | Renault | Procede de synchronisation du systeme electronique de commande de moteur a combustion interne |
WO1998017904A1 (fr) * | 1996-10-18 | 1998-04-30 | Renault | Procede de synchronisation du systeme electronique de commande de moteur a combustion interne |
WO2000019077A1 (de) * | 1998-09-30 | 2000-04-06 | Robert Bosch Gmbh | Einrichtung zur phasenerkennung |
Also Published As
Publication number | Publication date |
---|---|
ITBO940238A1 (it) | 1995-11-23 |
ITBO940238A0 (it) | 1994-05-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3261212B2 (ja) | 内燃機関の燃料噴射装置のための気筒判別方法 | |
US4932379A (en) | Method for detecting engine misfire and for fuel control | |
US5469823A (en) | Sensor arrangement for rapid cylinder detection in a multi-cylinder internal combustion engine | |
US6170322B1 (en) | Stroke identifying unit of a four-stroke engine | |
US4827886A (en) | Crank angle detecting system for an internal combustion engine | |
EP0678158B1 (de) | System zur steuerung einer brennkraftmaschine | |
US4998522A (en) | Method for injecting fuel into an internal-combustion engine | |
JP2617427B2 (ja) | 4サイクル内燃機関のシリンダにおける順次連続する燃料または点火分配の同期方法 | |
EP0862692B1 (de) | Verfahren zur bestimmung der phasenlage bei einer 4-takt brennkraftmaschine mit ungerader zylinderzahl | |
EP0846852B1 (de) | Verfahren zur Synchronisierung einer Brennkraftmaschine ohne Nockenwellenstandfühler | |
EP0990784B1 (de) | Verfahren zur Synchronisation einer Brennkraftmaschine | |
US4961410A (en) | Crank angle detecting device for a multi-cylinder internal combustion engine | |
US5860406A (en) | Engine timing apparatus and method of operating same | |
US4959996A (en) | Control signal generator for an internal combustion engine | |
US6907342B1 (en) | Method and apparatus for detecting a crank angle in an engine | |
SE467703B (sv) | Anordning foer elektronisk styrning av braensleinjektorer | |
EP0684376B1 (de) | Elektronisches System zur Hubidentifizierung eines Innenverbrennungsmotors | |
EP0684377A1 (de) | Elektronisches System zur Hubidentifizierung eines Innenverbrennungsmotors | |
US5562082A (en) | Engine cycle identification from engine speed | |
US5115792A (en) | Ignition control apparatus and method for an internal combustion engine | |
EP0375635B1 (de) | Verfahren und Vorrichtung zur Zündsteuerung bei inneren Brennkraftmaschinen, insbesondere bei Maschinen mit einer Zündspule pro Zylinder | |
EP0967379B1 (de) | Vorrichtung zur Berechnung der Drehzahl einer Brennkraftmaschine | |
US6058766A (en) | Crank angle detector | |
GB2337136A (en) | Regulating an engine using a transmitter wheel with a reference mark | |
US7499793B2 (en) | System for discrimination of spurious crank encoder signals |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB SE |
|
17P | Request for examination filed |
Effective date: 19960227 |
|
17Q | First examination report despatched |
Effective date: 19980304 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19980714 |