EP2011982A2 - Appareil de contrôle de l'injection de carburant - Google Patents

Appareil de contrôle de l'injection de carburant Download PDF

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Publication number
EP2011982A2
EP2011982A2 EP20080250781 EP08250781A EP2011982A2 EP 2011982 A2 EP2011982 A2 EP 2011982A2 EP 20080250781 EP20080250781 EP 20080250781 EP 08250781 A EP08250781 A EP 08250781A EP 2011982 A2 EP2011982 A2 EP 2011982A2
Authority
EP
European Patent Office
Prior art keywords
idle
time
fuel injection
idle operation
acceleration
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Withdrawn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
EP20080250781
Other languages
German (de)
English (en)
Inventor
Shinya Miyazaki
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.)
Nikki Co Ltd
Original Assignee
Nikki Co Ltd
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 Nikki Co Ltd filed Critical Nikki Co Ltd
Publication of EP2011982A2 publication Critical patent/EP2011982A2/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Withdrawn legal-status Critical Current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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
    • F02D41/023—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio shifting
    • 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
    • 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
    • F02D41/30—Controlling fuel injection

Definitions

  • the present invention relates to a fuel injection control apparatus controlling a drive of a fuel injection valve in correspondence to a throttle operation and an engine operational state, and more particularly to a fuel injection control apparatus arranged in a fuel feed system of a vehicle mounted engine, and having a function of regulating a fuel injection amount in correspondence to whether or not an idle operational state is established by providing an idle determining means.
  • a fuel injection control is generally carried out for achieving an accurate fuel injection on the basis of various data detected by a plurality of monitors by providing a fuel injection control apparatus.
  • the present invention is made for the purpose of solving the problem as mentioned above, and an object of the present invention is to avoid a useless fuel consumption caused by a gear change during an acceleration and a deterioration of an exhaust performance, in a fuel injection control of a vehicle mounted engine.
  • a fuel injection control apparatus arranged in a fuel feed system of a vehicle mounted engine having a function of temporarily correcting so as to increase a fuel injection amount by detecting a change from an idle operation to a non-idle operation by an idle operation determining means, wherein an amount increase correcting amount is set to zero or decreased in comparison with a normal one in the case that it is determined by an acceleration determining means at a time of changing gear that the change to the non-idle operation is caused by an acceleration after changing gear.
  • the acceleration determining means at a time of changing gear is structured such as to detect an ON/OFF state of a neutral switch, detect an idle operating time and a non-idle operating time just before detecting a change to the non-idle operation, and determine an acceleration after changing gear under a condition that the detected idle operating time is shorter than a predetermined reference idle operating time, the detected non-idle operating time is equal to or longer than a predetermined reference non-idle operating time, and the neutral switch is in the ON state, it is possible to easily and securely determine the acceleration after changing gear which has a little necessity of the amount increase correction.
  • Fig. 1 is a layout diagram showing a fuel feed system of a vehicle mounted engine in which an electronic control unit 10 is arranged as a fuel injection control apparatus executing a fuel injection control of an engine 1.
  • a throttle valve 3 is arranged in an intake passage 2 connected to the engine 1, and a fuel injection valve 6 is arranged in a downstream side thereof.
  • the electronic control unit 10 is constituted by a general purpose electronic control unit (ECU) provided with CPU, ROM, RAM (not shown) and the like in a hardware, and is constituted by a fuel injection control apparatus in which a fuel injection control program for executing a fuel injection control described below is stored, in a function.
  • the electronic control unit 10 may be structured such as to be provided with a function of executing the other controls in the engine or the vehicle in addition to this function.
  • a throttle opening degree sensor 11 is additionally provided in the throttle valve 3, and is structured such that an output signal is input to the electronic control unit 10.
  • the throttle opening degree sensor 11 is utilized as an idle switch for detecting an idle operating state, and determines on the basis of the output signal whether or not an idle operating state determining means provided within the electronic control unit 10 is in an idle operating state, and the electronic control unit 10 recognizes a change from an idle operation to a non-idle operation on the basis of the determination.
  • an output signal from a neutral switch 12 is input to the electronic control unit 10, and an acceleration determining means at a time of changing gear is provided in the electronic control unit 10.
  • the acceleration determining means at a time of changing gear detects an ON/OFF state of the neutral switch 12, and detects each of times about one segmentation of the idle operation and one segmentation of the non-idle operation which were carried out just before the change to the non-idle operation, on the basis of the time detecting the change to the non-idle operation.
  • the acceleration determining means at a time of changing gear determines the acceleration after changing gear, under a condition that a detected idle time is shorter than a predetermined reference idle time (KAIIDONTM [S]), a detected off idle time is equal to or longer than a predetermined reference off idle time (KAIIDOFFTM [S]), and the neutral switch 12 is in the ON state.
  • a predetermined reference idle time (KAIIDONTM [S])
  • a detected off idle time is equal to or longer than a predetermined reference off idle time (KAIIDOFFTM [S])
  • the neutral switch 12 is in the ON state.
  • the electronic control unit 10 is programmed in such a manner that the electronic control unit 10 does not carry out a temporary fuel amount increase correction which is normally carried out at a time of detecting the change from the idle operation to the non-idle operation, and this point forms a characteristic portion of the present embodiment.
  • the reference idle time (KAIIDONTM [S]) and the reference off idle time (KAIIDOFFTM [S]) which are used for this determination may be set by simulating various engine operating states, as a result, determining both suitable numerical values corresponding only to the acceleration after changing gear.
  • Fig. 4 is a graph of a control executed in the conventional engine fuel injection control apparatus, in which an upper side is a graph showing an ON/OFF of an idle operating state, and a lower side is a graph of a fuel amount increase (Kai) rate at a time of changing to an off idle.
  • a temporary fuel amount increase (Kai) process for securing a good engine operating performance is carried out each time of changing from an idle to an off idle.
  • the fuel amount is controlled such as not to be increased.
  • the acceleration determining means at a time of changing gear the acceleration after changing gear is determined under a condition that the last idle time a is shorter than the previously stored reference idle time (KAIIDONTM [S]) defined on the basis of the data of the experiment or the like, the last off idle time B is equal to or longer than the stored reference off idle time (KAIIDOFFTM [S]) and the connected state of the gear detected by the neutral switch 12 is ON.
  • the determination by the acceleration determining means at a time of changing gear is carried out in the same manner each time of changing from the idle to the off idle, however, since the last idle time A is longer than the reference idle time (KAIIDONTM [S]) on the basis of a rising time of each of the racings, or the last off idle time b is shorter than the reference off idle time (KAIIDOFFTM [S]), whereby the determination condition is not satisfied, as shown in Fig. 2 , the general fuel amount increase correction is carried out.
  • Fig. 5 shows a flow chart showing a determining procedure executed by the acceleration determining means at a time of changing the electronic control unit 10. This procedure is started by detecting the change from the idle to the off idle, first determines whether or not the neutral switch is in an OFF state (A1), goes back if the neutral switch is in an ON state, and determines whether or not the idle time just before changing to the off idle is shorter than the reference idle time (KAIIDONTM [S]) if the neutral switch is in the OFF state (A2).
  • the procedure goes back if the idle time is longer, determines whether or not the last off idle time is equal to or longer than the reference off idle time (KAIIDOFFTM [S]) if the idle time is shorter (A3), goes back if the idle time is shorter than the reference off idle time, and determines the acceleration after changing gear if the idle time is equal to or longer than the reference off idle time, thereby setting no fuel amount increase (Kai) process (zero %) (A4).
  • Kai fuel amount increase
  • the electronic control unit 10 corresponding to the fuel injection control apparatus executes the control mentioned above, it is possible to accurately determine whether or not the acceleration is the acceleration after changing gear which is not necessary to increase the amount of the fuel, and it is possible to well maintain the engine operating performance while avoiding the waste of the fuel consumption and the deterioration of the exhaust performance without carrying out the unnecessary fuel amount increase correction.
  • Fig. 3 shows a graph of a control executed by a fuel injection control apparatus in an engine fuel feed system in accordance with a second embodiment of the present invention.
  • the present embodiment is characterized by a point that in the case that the acceleration after changing the gear is determined by an acceleration determining means at a time of changing gear, the fuel amount is increased only at such an amount that comes short by only the normal acceleration amount increase correction in place of setting the fuel amount increase (Kai) to zero, thereby reducing the fuel amount increase to one half or less than the normal fuel amount increase (Kai) rate, as shown in a graph in a lower side of Fig. 3 , approximately in the same manner as the first embodiment mentioned above.
  • the amount increase correction is carried out in such a manner as to fill up the excess and deficiency between the amount which is actually necessary to be increased in the fuel injection and the normal acceleration amount increase correction amount, in the acceleration after changing gear going with the vehicle travel, it is possible to achieve a precise fuel injection control, and it is possible to maintain the engine operating performance in a further good state.

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 Vehicle Engines Or Engines For Specific Uses (AREA)
EP20080250781 2007-07-05 2008-03-07 Appareil de contrôle de l'injection de carburant Withdrawn EP2011982A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007176971A JP2009013881A (ja) 2007-07-05 2007-07-05 エンジンの燃料噴射制御装置

Publications (1)

Publication Number Publication Date
EP2011982A2 true EP2011982A2 (fr) 2009-01-07

Family

ID=39876742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080250781 Withdrawn EP2011982A2 (fr) 2007-07-05 2008-03-07 Appareil de contrôle de l'injection de carburant

Country Status (2)

Country Link
EP (1) EP2011982A2 (fr)
JP (1) JP2009013881A (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05256178A (ja) 1992-03-16 1993-10-05 Nippondenso Co Ltd 内燃機関のアイドル回転数制御装置
JPH06117301A (ja) 1992-09-30 1994-04-26 Mazda Motor Corp エンジンの燃料制御装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05256178A (ja) 1992-03-16 1993-10-05 Nippondenso Co Ltd 内燃機関のアイドル回転数制御装置
JPH06117301A (ja) 1992-09-30 1994-04-26 Mazda Motor Corp エンジンの燃料制御装置

Also Published As

Publication number Publication date
JP2009013881A (ja) 2009-01-22

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