EP0185183A2 - Système d'injection de carburant à commande électronique pour un moteur à combustion - Google Patents

Système d'injection de carburant à commande électronique pour un moteur à combustion Download PDF

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Publication number
EP0185183A2
EP0185183A2 EP85114108A EP85114108A EP0185183A2 EP 0185183 A2 EP0185183 A2 EP 0185183A2 EP 85114108 A EP85114108 A EP 85114108A EP 85114108 A EP85114108 A EP 85114108A EP 0185183 A2 EP0185183 A2 EP 0185183A2
Authority
EP
European Patent Office
Prior art keywords
voltage
fuel
correction
injection system
fuel injection
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Withdrawn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
EP85114108A
Other languages
German (de)
English (en)
Other versions
EP0185183A3 (fr
Inventor
Hans-Martin Dipl.-Ing. Müller
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0185183A2 publication Critical patent/EP0185183A2/fr
Publication of EP0185183A3 publication Critical patent/EP0185183A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F02D41/3005—Details not otherwise provided for
    • 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
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/503—Battery correction, i.e. corrections as a function of the state of the battery, its output or its type

Definitions

  • the invention is based on an electronically controlled fuel injection system according to the preamble of the main claim. From DE-OS 15 26 506 a fuel injection system with a supply voltage correction is known. It says on page 34 that fluctuations in the supply voltage have an influence on the fuel injection system, because the injection valves open faster when the voltage is higher than when the voltage is lower.
  • DE-AS 22 65 224 also discloses an "electrically controlled fuel injection system for an internal combustion engine with a control multivibrator and electrical voltage correction". This voltage correction is also justified in connection with the voltage dependence of the injection valves.
  • One of the objects of the invention is therefore to show ways to completely eliminate a battery voltage dependency of the injection and thus to achieve optimal results.
  • FIG. 1 shows an overview of a fuel injection system
  • FIG. 2 shows a roughly schematic flow diagram for determining the injection signals
  • FIG. 3 shows a diagram of the fuel delivery quantity as a function of the supply voltage of an electrically operated fuel pump
  • FIG. 4 shows a pressure regulator characteristic as a function of the fuel delivery quantity
  • FIG. 5 shows a correction factor for the injection signals depending on the supply voltage, taking into account the supply voltage-dependent fuel delivery rate of the fuel pump and the delivery rate dependency of the pressure regulator characteristic.
  • FIG. 1 shows an overview of a fuel injection system for an internal combustion engine.
  • the internal combustion engine itself is designated, with 11 its air intake pipe and with 12 the exhaust pipe.
  • An air flow rate sensor in the intake pipe 11 is identified by 13. In principle, it represents a load sensor.
  • flap air quantity sensor it is of course also possible to e.g. a pressure sensor downstream of a throttle valve 14, or a throttle valve angle / speed-controlled system can be used.
  • the throttle valve 14 is actuated via an accelerator pedal 15.
  • a speed sensor 16 is assigned to the internal combustion engine 10 and 17 denotes an exhaust gas sensor in the exhaust pipe 12 which may be used.
  • a control unit 20 for providing a fuel injection signal receives signals as the main input variables with respect to the speed from the speed sensor 16 and with respect to the load from the air quantity sensor 13 or from the throttle valve 14. In addition, it has additional inputs for the temperature, for a lambda value when using the Gas probe 17 and possibly also an input for the position of the throttle valve 14. In addition, the control unit 20 receives the battery voltage UBatt, which is used on the one hand as a supply voltage and on the other hand also serves as a variable to be detected in connection with the voltage correction.
  • 21 marks a fuel tank, 22 a pressure regulator and 24 an electromagnetically actuated fuel injection valve that connects to the intake manifold 11 of the internal combustion engine 10 communicates. It should be emphasized that the specified sequence in the air flow of the intake pipe 11 - air quantity sensor, injection valve and throttle valve - need not necessarily be so, other sequences are also quite common. For example, the fuel injection can also take place more or less immediately downstream of the throttle valve 14.
  • FIG. 1 The arrangement of an electrically controlled or regulated fuel injection system shown in FIG. 1 is known as such.
  • the increasingly realized computer controls in connection with the gasoline injection generally follow the very rough flow diagram shown in FIG.
  • the individual parameters 26 are read in.
  • the determination of the basic injection time (27) is followed by the determination of the basic injection time (27).
  • this basic injection time is influenced by correction factors.
  • the injection signal (29) is read out and thus the injection process itself is carried out. This completes an individual process (30).
  • the individual processes in a computer-controlled and analog control unit for gasoline injection can be extremely complex.
  • the present invention starts with the formation of the correction signals. These can be both additive and multiplicative in terms of voltage correction.
  • the battery voltage correction is additive with a view to the injection valves.
  • Figure 3 shows the relationship between the fuel delivery QK in liters per hour and the supply voltage for the fuel pump in volts. If the delivery volume falls below a critical delivery rate Qcrit due to a low supply voltage, the specified system pressure can no longer be maintained. As a result, the amount of fuel discharged from the injection valve becomes smaller. In addition, there is the need shown in FIG. 4 to provide a certain delivery rate in order to maintain the system pressure. According to this FIG. 4, the system pressure (Psystem) drops considerably below the critical delivery quantity Qkrit. In order to compensate for the decrease in the amount of fuel injected, the injection time is extended depending on the supply voltage so that the amount of fuel now dispensed again corresponds to the desired value. For this purpose, a correction factor can be seen from FIG.
  • FIG. 5 indicates the area in which the pressure regulator is not active. II marks the pressure regulator active area.

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  • 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)
EP85114108A 1984-12-13 1985-11-06 Système d'injection de carburant à commande électronique pour un moteur à combustion Withdrawn EP0185183A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843445414 DE3445414A1 (de) 1984-12-13 1984-12-13 Elektronisch gesteuertes kraftstoffeinspritzsystem fuer eine brennkraftmaschine
DE3445414 1984-12-13

Publications (2)

Publication Number Publication Date
EP0185183A2 true EP0185183A2 (fr) 1986-06-25
EP0185183A3 EP0185183A3 (fr) 1987-03-04

Family

ID=6252634

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114108A Withdrawn EP0185183A3 (fr) 1984-12-13 1985-11-06 Système d'injection de carburant à commande électronique pour un moteur à combustion

Country Status (4)

Country Link
US (1) US4681076A (fr)
EP (1) EP0185183A3 (fr)
JP (1) JPS61142346A (fr)
DE (1) DE3445414A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246357A1 (fr) * 1986-05-15 1987-11-25 VDO Adolf Schindling AG Procédé de contrôle d'un injecteur électromagnétique

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4982331A (en) * 1988-01-25 1991-01-01 Mitsubishi Denki Kabushiki Kaisha Fuel injector control apparatus
JPH03199667A (ja) * 1989-12-27 1991-08-30 Yamaha Motor Co Ltd ２サイクルエンジンの空気燃料噴射装置
US5448977A (en) * 1993-12-17 1995-09-12 Ford Motor Company Fuel injector pulsewidth compensation for variations in injection pressure and temperature
US5474054A (en) * 1993-12-27 1995-12-12 Ford Motor Company Fuel injection control system with compensation for pressure and temperature effects on injector performance
US5919260A (en) * 1996-02-12 1999-07-06 Belzile; Bruno Electrical apparatus producing direct computer controlled variance in operation of an electrical end device
DE19636451B4 (de) * 1996-09-07 2010-06-10 Robert Bosch Gmbh Einrichtung zum Steuern der einer Brennkraftmaschine zuzuführenden Kraftstoffmenge
CN103527338B (zh) * 2013-10-29 2016-03-16 潍柴动力股份有限公司 一种喷油修正方法及***
CN105114195A (zh) * 2014-05-05 2015-12-02 博世有限公司 对燃料泵的电压调制
US10087866B2 (en) 2015-08-31 2018-10-02 Infineon Technologies Ag Detecting fuel injector timing with current sensing
US10859027B2 (en) * 2017-10-03 2020-12-08 Polaris Industries Inc. Method and system for controlling an engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1555024A (fr) * 1967-02-07 1969-01-24
GB1154270A (en) * 1966-11-25 1969-06-04 Bosch Gmbh Robert Improvements relating to Fuel Injection Systems
JPS5830422A (ja) * 1981-08-13 1983-02-22 Mitsubishi Electric Corp 内燃機関用燃料噴射装置
US4445483A (en) * 1981-02-20 1984-05-01 Honda Motor Co., Ltd. Fuel supply control system for internal combustion engines, having a function of leaning mixture in an engine low load region
EP0121028A1 (fr) * 1981-09-28 1984-10-10 The Bendix Corporation Injection directe de gaz de pétrole liquéfié liquide

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406266A (en) * 1981-08-28 1983-09-27 Colt Industries Operating Corp. Fuel metering and discharging apparatus for a combustion engine
JPS5872636A (ja) * 1981-10-26 1983-04-30 Nissan Motor Co Ltd 直接噴射式ガソリンエンジン
JPS58180734A (ja) * 1982-04-15 1983-10-22 Honda Motor Co Ltd 内燃エンジンの燃料供給制御方法
DE3434339A1 (de) * 1984-09-19 1986-03-27 Robert Bosch Gmbh, 7000 Stuttgart Elektronische einrichtung zum erzeugen eines kraftstoffzumesssignals fuer eine brennkraftmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1154270A (en) * 1966-11-25 1969-06-04 Bosch Gmbh Robert Improvements relating to Fuel Injection Systems
FR1555024A (fr) * 1967-02-07 1969-01-24
US4445483A (en) * 1981-02-20 1984-05-01 Honda Motor Co., Ltd. Fuel supply control system for internal combustion engines, having a function of leaning mixture in an engine low load region
JPS5830422A (ja) * 1981-08-13 1983-02-22 Mitsubishi Electric Corp 内燃機関用燃料噴射装置
EP0121028A1 (fr) * 1981-09-28 1984-10-10 The Bendix Corporation Injection directe de gaz de pétrole liquéfié liquide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 7, Nr. 110 (M-214)[1255], 13. Mai 1983; & JP-A-58 030 422 (MITSUBISHI DENKI K.K.) 22-02-1983 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246357A1 (fr) * 1986-05-15 1987-11-25 VDO Adolf Schindling AG Procédé de contrôle d'un injecteur électromagnétique

Also Published As

Publication number Publication date
US4681076A (en) 1987-07-21
JPS61142346A (ja) 1986-06-30
DE3445414A1 (de) 1986-06-19
EP0185183A3 (fr) 1987-03-04

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