EP0614003A1 - Méthode pour contrôler le fonctionnement en décelleration d'un moteur à combustion interne - Google Patents

Méthode pour contrôler le fonctionnement en décelleration d'un moteur à combustion interne Download PDF

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Publication number
EP0614003A1
EP0614003A1 EP93103599A EP93103599A EP0614003A1 EP 0614003 A1 EP0614003 A1 EP 0614003A1 EP 93103599 A EP93103599 A EP 93103599A EP 93103599 A EP93103599 A EP 93103599A EP 0614003 A1 EP0614003 A1 EP 0614003A1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
overrun
cylinders
patterns
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
EP93103599A
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German (de)
English (en)
Other versions
EP0614003B1 (fr
Inventor
Bernhard Dipl.-Ing. Bauer (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE59305344T priority Critical patent/DE59305344D1/de
Priority to EP19930103599 priority patent/EP0614003B1/fr
Publication of EP0614003A1 publication Critical patent/EP0614003A1/fr
Application granted granted Critical
Publication of EP0614003B1 publication Critical patent/EP0614003B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • F02D41/126—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off transitional corrections at the end of the cut-off period
    • 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
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • F02D2250/21—Control of the engine output torque during a transition between engine operation modes or states

Definitions

  • the invention relates to a method for controlling the overrun operation of an internal combustion engine according to the preamble of claim 1.
  • This method is used in particular to control the fuel supply to an internal combustion engine before and after the overrun operation.
  • Thrust operation is generally spoken of when the speed of the internal combustion engine exceeds a certain, predetermined value when the throttle valve is closed. Overrun operation can also be recognized if the throttle valve is not completely closed, but falls below a predetermined opening angle and the speed is above the value that would normally be set for the respective accelerator pedal position.
  • an actuator that doses the combustion air when the throttle valve is closed, adjusted to a position that only allows a small air flow.
  • This method has the disadvantage that the ignition angle cannot always be adjusted to the value required for the desired torque reduction in the "late” direction, and the idle filling actuator cannot always be concluded that the air flow rate is sufficiently small without over-evacuating the intake manifold or one Fear of the internal combustion engine to fear.
  • the invention has for its object to provide a method of the type mentioned for an internal combustion engine with several cylinders so that soft torque transitions from overrun to overrun shutdown and vice versa can be realized in a simple manner.
  • the reference number 10 denotes an internal combustion engine with four cylinders Z1 to Z4.
  • An injection valve EV1 to EV4 is assigned to each of these cylinders, which inject fuel in a predetermined sequence into individual intake pipes of the respective cylinders (sequential fuel injection).
  • the injection valves are parts of a fuel circuit, not shown, which in a manner known per se consists of a fuel tank, a pressure regulator, a fuel pump, a fuel filter and corresponding lines.
  • the combustion air contains the internal combustion engine 10 via an air filter 11, an intake duct 12 and a throttle valve block 13.
  • This throttle valve block 13 contains a throttle valve, a throttle valve switch and / or a throttle valve opening angle sensor.
  • an air mass meter 14 is provided in the intake duct 12, which can be implemented either as a hot film air mass meter or as a hot wire air mass meter.
  • a three-way catalytic converter 16 is provided in an exhaust gas duct 15 for separating out the constituents HC, CO and NO x contained in the exhaust gases.
  • a lambda probe 17 is inserted in the exhaust gas duct 15 upstream of the three-way catalytic converter 16.
  • a sensor 18 for detecting the engine speed and a coolant temperature sensor are located at suitable points on the internal combustion engine 19 available.
  • the outputs of the sensors mentioned and the inputs of the actuators mentioned are connected via interfaces to corresponding inputs and outputs of an electronic control device 20.
  • Such electronic control devices for internal combustion engines which in addition to fuel injection can also perform a variety of other tasks (e.g. ignition control), are known per se, so that only the structure and mode of operation associated with the present invention are dealt with below.
  • the internal combustion engine is in partial load operation and the driver of the vehicle takes his foot off the accelerator pedal, i.e. the throttle valve closes completely and the speed of the internal combustion engine is above a limit value, so overrun mode is recognized and the fuel supply to the internal combustion engine can be prevented.
  • the position of the accelerator pedal 21 can also be used.
  • a first step S1 both the position of the throttle valve and the current speed n of the internal combustion engine are read.
  • the throttle valve block 13 according to FIG. 1 can either contain a throttle valve position sensor or, in the simplest case, a throttle valve switch, the output signal of which, like the signal of the speed sensor 18, is supplied to the electronic control device 20.
  • step S2 it is queried whether the throttle valve is closed and the current speed n of the internal combustion engine is above a limit value GW1.
  • This limit value GW1 can be stored, for example, as a function of the machine temperature and the coolant temperature, in a map 23 of a memory in the electronic control device 21.
  • step S7 If one of the queries is negative, there is no overrun operation and the injection pulses TI are passed on unchanged to the injection valves EV1-EV4 in step S7. If both queries are positive, overrun mode is recognized in step S3 and overrun cutoff is activated in step S4. For this purpose, masking patterns are read out from a memory 22 of the electronic control device 20, according to the structure of which the injection pulses TI for individual cylinders Z1 to Z4 of the internal combustion engine 10 are selectively suppressed in step S5.
  • FIG. 3 the 16 possible blanking patterns A to P are shown using the example of a four-cylinder internal combustion engine.
  • the cylinders Z1 to Z4 are plotted in their usual firing order from left to right.
  • a filled (black) square signals an injection pulse for the injection valve assigned to the respective cylinder, while an empty (white) square means that the injection pulse for the respective injection valve is suppressed.
  • blanking pattern P all cylinders Z1 to Z4 are therefore supplied with fuel (normal driving operation), with blanking pattern A, the fuel supply is completely prevented (overrun cutoff).
  • Combinations between these two fade-out patterns are either one (Pattern B, C, E, I), two (pattern D, F, G, J, K) or three injectors (pattern H, L, N, O) are activated.
  • These masking patterns are stored in a read-only memory (ROM) 22 of the electronic control device 22, it being possible for reasons of capacity to store two of these masking patterns as one byte.
  • the 16 possible skip patterns in a four-cylinder internal combustion engine result in a consequence of masking patterns (5 patterns in the exemplary embodiment) defined and read out in accordance with the respective operating state change.
  • the injection of all four cylinders remains switched off after the last blanking pattern has been carried out.
  • the injection of all four cylinders remains switched on after the last blanking pattern has been carried out.
  • the sequences of fade-out patterns are defined separately for the respective transitions, ie in the example given a selection of five fade-out patterns is selected from the 16 possible patterns.
  • the Fade-out patterns can still be differentiated according to the applied speed, the speed change speed (speed gradient) and the respective throttle valve angle or throttle valve gradient.
  • the further execution of the previously read sequence of skip patterns is stopped and the corresponding skip pattern (ie the byte sequence) is run "backwards". If, for example, the transition after overrun cut-off is active and the driver of the vehicle presses the accelerator pedal again, the sequence of skip patterns is not run through to the end, but back to the beginning. In this case, the transition function is ended when the first masking pattern of this sequence is read in again and executed as an injection sequence. Entry into a transition function is not linked to a cylinder number, ie the first masking pattern does not necessarily have to begin with cylinder Z1. The sequence of blanking patterns is started regardless of the cylinder numbering if the criteria for thrust detection or for thrust end are met.
  • the method according to the invention can of course also be used for internal combustion engines with a different number of cylinders, for example for 6-cylinder internal combustion engines. In this case there are 64 possible masking patterns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP19930103599 1993-03-05 1993-03-05 Méthode pour contrÔler le fonctionnement en décelleration d'un moteur à combustion interne Expired - Lifetime EP0614003B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59305344T DE59305344D1 (de) 1993-03-05 1993-03-05 Verfahren zur Steuerung des Schubbetriebes einer Brennkraftmaschine
EP19930103599 EP0614003B1 (fr) 1993-03-05 1993-03-05 Méthode pour contrÔler le fonctionnement en décelleration d'un moteur à combustion interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19930103599 EP0614003B1 (fr) 1993-03-05 1993-03-05 Méthode pour contrÔler le fonctionnement en décelleration d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP0614003A1 true EP0614003A1 (fr) 1994-09-07
EP0614003B1 EP0614003B1 (fr) 1997-01-29

Family

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EP19930103599 Expired - Lifetime EP0614003B1 (fr) 1993-03-05 1993-03-05 Méthode pour contrÔler le fonctionnement en décelleration d'un moteur à combustion interne

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EP (1) EP0614003B1 (fr)
DE (1) DE59305344D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704313A1 (de) * 1997-02-05 1998-08-06 Siemens Ag Verfahren und Einrichtung zum Steuern einer Brennkraftmaschine
EP1418330A1 (fr) * 2002-11-11 2004-05-12 Ford Global Technologies, Inc. Méthode de réglage d'un moteur à combustion interne

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259052B3 (de) 2002-12-17 2004-04-01 Siemens Ag Verfahren zum Aufheizen eines Abgaskatalysators einer mit Kraftstoff-Direkteinspritzung arbeitenden Brennkraftmaschine
US8689541B2 (en) 2011-02-16 2014-04-08 GM Global Technology Operations LLC Valvetrain control method and apparatus for conserving combustion heat
DE102013219701B3 (de) * 2013-09-30 2014-12-11 Continental Automotive Gmbh Verfahren und Vorrichtung zur Steuerung des Übergangs zwischen dem Betrieb mit Schubabschaltung und Normalbetrieb einer mit Kraftstoff-Direkteinspritzung betriebenen Brennkraftmaschine
DE102023125647B3 (de) 2023-09-21 2024-06-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Betreiben einer Brennkraftmaschine nach einer Schubabschaltung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2739223A1 (de) * 1976-09-06 1978-03-09 Alfa Romeo Spa Einspritzanlage fuer verbrennungskraftmotoren
DE2801790A1 (de) * 1978-01-17 1979-07-19 Bosch Gmbh Robert Verfahren und einrichtung zur steuerung der kraftstoffzufuhr zu einer brennkraftmaschine
US4276863A (en) * 1978-05-12 1981-07-07 Nissan Motor Company, Limited Apparatus for controlling the number of enabled cylinders of an internal combustion engine upon deceleration
GB2092777A (en) * 1981-02-06 1982-08-18 Brunswick Corp Fuel injection in an internal combustion engine
US5119781A (en) * 1991-02-28 1992-06-09 General Motors Corporation Control of engine fuel injection during transitional periods associated with deceleration fuel cut-off

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2739223A1 (de) * 1976-09-06 1978-03-09 Alfa Romeo Spa Einspritzanlage fuer verbrennungskraftmotoren
DE2801790A1 (de) * 1978-01-17 1979-07-19 Bosch Gmbh Robert Verfahren und einrichtung zur steuerung der kraftstoffzufuhr zu einer brennkraftmaschine
US4276863A (en) * 1978-05-12 1981-07-07 Nissan Motor Company, Limited Apparatus for controlling the number of enabled cylinders of an internal combustion engine upon deceleration
GB2092777A (en) * 1981-02-06 1982-08-18 Brunswick Corp Fuel injection in an internal combustion engine
US5119781A (en) * 1991-02-28 1992-06-09 General Motors Corporation Control of engine fuel injection during transitional periods associated with deceleration fuel cut-off

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704313A1 (de) * 1997-02-05 1998-08-06 Siemens Ag Verfahren und Einrichtung zum Steuern einer Brennkraftmaschine
DE19704313C2 (de) * 1997-02-05 2003-07-03 Siemens Ag Verfahren und Einrichtung zum Steuern einer Brennkraftmaschine
EP1418330A1 (fr) * 2002-11-11 2004-05-12 Ford Global Technologies, Inc. Méthode de réglage d'un moteur à combustion interne

Also Published As

Publication number Publication date
DE59305344D1 (de) 1997-03-13
EP0614003B1 (fr) 1997-01-29

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