EP0747589A2 - Commande du rapport air-carburant en fonction de la position du papillon - Google Patents

Commande du rapport air-carburant en fonction de la position du papillon Download PDF

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Publication number
EP0747589A2
EP0747589A2 EP96303958A EP96303958A EP0747589A2 EP 0747589 A2 EP0747589 A2 EP 0747589A2 EP 96303958 A EP96303958 A EP 96303958A EP 96303958 A EP96303958 A EP 96303958A EP 0747589 A2 EP0747589 A2 EP 0747589A2
Authority
EP
European Patent Office
Prior art keywords
throttle position
fuel
change
fuel ratio
throttle
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Withdrawn
Application number
EP96303958A
Other languages
German (de)
English (en)
Other versions
EP0747589A3 (fr
Inventor
Anthony Gerald Micale
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.)
Ford Werke GmbH
Ford France SA
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Werke GmbH
Ford France SA
Ford Motor Co Ltd
Ford Motor Co
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 Ford Werke GmbH, Ford France SA, Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Werke GmbH
Publication of EP0747589A2 publication Critical patent/EP0747589A2/fr
Publication of EP0747589A3 publication Critical patent/EP0747589A3/fr
Withdrawn legal-status Critical Current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
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration

Definitions

  • This invention relates to controlling the operating conditions of an internal combustion engine using an electronic engine control module.
  • Such sensors can include, for example, the exhaust gas oxygen sensor, the mass air flow sensor, and the temperature sensor.
  • air to fuel ratio may be adjusted to be rich during engine operating conditions such as acceleration. Nevertheless, it would be desirable to improve engine operation in response to an acceleration condition.
  • a method of controlling air fuel ratio in an internal combustion engine having a throttle wherein air fuel ratio is controlled as a function of the rate of change of the throttle position of the internal combustion engine.
  • a method of controlling air fuel ratio in an internal combustion engine having a throttle including the steps of:
  • This invention recognises utilising a throttle position sensor output and proportional control in an electronic engine control processor to more accurately and quickly predict tip in acceleration and control air to fuel ratio. That is, air to fuel ratio is more uniformly controlled and rich and lean air to fuel ratio excursions reduced. As a result, engine operation and customer satisfaction is improved.
  • a powertrain for a vehicle includes an engine 10 which receives air through a intake duct 11 having therein a mass air flow sensor 12 and a throttle 13. Throttle 13 is connected to a position sensor 14, such as a Hall effect or a phased array optically encoded sensor, which produces a signal output applied to an electronic engine control module 15. Electronic engine control module 15 also receives an input from the output of mass air flow sensor 12. The output from electronic engine control module 15 is applied to a fuel injector 16 which controls the introduction of fuel into engine 10 from a fuel line 17.
  • Fig. 2 characteristic traces of throttle position, cylinder air charge, fuel mass (e.g. fuel injector pulsewidth), and air fuel ratio are shown with respect to time in response to a tip in or acceleration by the driver.
  • the throttle position provides the most advanced information when the tip in occurs at time A.
  • Fuel pulsewidth correction starts to occur at point B so that there is a time delay between point C and point B before the air fuel ratio is beginning to correct.
  • the air fuel ratio versus time shows that there is a lean excursion starting at point C when air charge is increased but fuel is not increased.
  • Shown in dotted line on the air fuel ratio line is the improvement using information from the throttle position to control the air fuel ratio.
  • Shown in dotted line on the fuel mass line is the corresponding change to the fuel mass in accordance with this invention. That is, the dotted change shown for fuel mass produces the improved control of air fuel ratio shown in dotted line.
  • the magnitude of the lean excursion of the air fuel ratio at time B is reduced or eliminated as is the magnitude of a rich air fuel excursion after time B.
  • logic flow for a method of throttle based fuel adder as a lean excursion eliminator begins at a start block 30.
  • Logic flow goes to a block 31 wherein the throttle position (TPS) is calculated.
  • Logic flow then goes to a block 32 where the minimum change required in throttle position to add fuel (MIN_DEL_TPS) is looked up from stored information .
  • MIN_DEL_TPS minimum change required in throttle position to add fuel
  • block 35 provides a proportional fuel adder and the throttle position fuel adder may be a function of throttle position change per unit of time. Logic flow from block 35 goes back to block 33.
  • Fig. 4 there is shown a graphical representation of fuel compensation for tip in as a function of change in throttle position angle per unit time. That is, the X-axis indicates the change in throttle position per unit time (DEL_TPS), and the Y-axis indicates the fuel compensation for tip in (TFC_TP). One line indicates the relationship between these parameters for small throttle angles, another for medium throttle angles, and another for large throttle angles. Thus the graphical representation shows the differing proportionalities of how much fuel is added as a function of throttle position.

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)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Feedback Control In General (AREA)
EP96303958A 1995-06-06 1996-05-31 Commande du rapport air-carburant en fonction de la position du papillon Withdrawn EP0747589A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46911395A 1995-06-06 1995-06-06
US469113 1995-06-06

Publications (2)

Publication Number Publication Date
EP0747589A2 true EP0747589A2 (fr) 1996-12-11
EP0747589A3 EP0747589A3 (fr) 1999-05-06

Family

ID=23862476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96303958A Withdrawn EP0747589A3 (fr) 1995-06-06 1996-05-31 Commande du rapport air-carburant en fonction de la position du papillon

Country Status (2)

Country Link
EP (1) EP0747589A3 (fr)
JP (1) JPH08334044A (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0196227A2 (fr) * 1985-03-27 1986-10-01 Honda Giken Kogyo Kabushiki Kaisha Méthode de commande de l'alimentation en combustible d'un moteur à combustion interne en accélération
JPS61237855A (ja) * 1985-04-15 1986-10-23 Mazda Motor Corp エンジンの空燃比制御装置
US4711218A (en) * 1987-02-05 1987-12-08 General Motors Corporation Acceleration enrichment fuel control
US4972820A (en) * 1988-08-03 1990-11-27 Honda Giken Kogyo K.K. Fuel supply control system for internal combustion engines at acceleration
US5069187A (en) * 1989-09-05 1991-12-03 Honda Giken Kogyo K.K. Fuel supply control system for internal combustion engines
JPH0447132A (ja) * 1990-06-14 1992-02-17 Toyota Motor Corp 内燃機関の燃料噴射量制御装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0196227A2 (fr) * 1985-03-27 1986-10-01 Honda Giken Kogyo Kabushiki Kaisha Méthode de commande de l'alimentation en combustible d'un moteur à combustion interne en accélération
JPS61237855A (ja) * 1985-04-15 1986-10-23 Mazda Motor Corp エンジンの空燃比制御装置
US4711218A (en) * 1987-02-05 1987-12-08 General Motors Corporation Acceleration enrichment fuel control
US4972820A (en) * 1988-08-03 1990-11-27 Honda Giken Kogyo K.K. Fuel supply control system for internal combustion engines at acceleration
US5069187A (en) * 1989-09-05 1991-12-03 Honda Giken Kogyo K.K. Fuel supply control system for internal combustion engines
JPH0447132A (ja) * 1990-06-14 1992-02-17 Toyota Motor Corp 内燃機関の燃料噴射量制御装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 082 (M-571), 12 March 1987 & JP 61 237855 A (MAZDA MOTOR CORP), 23 October 1986 *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 232 (M-1256), 28 May 1992 & JP 04 047132 A (TOYOTA MOTOR CORP), 17 February 1992 *

Also Published As

Publication number Publication date
EP0747589A3 (fr) 1999-05-06
JPH08334044A (ja) 1996-12-17

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