US3747575A - Load dependent control circuit for a gasoline fuel injection unit - Google Patents

Load dependent control circuit for a gasoline fuel injection unit Download PDF

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Publication number
US3747575A
US3747575A US00126649A US3747575DA US3747575A US 3747575 A US3747575 A US 3747575A US 00126649 A US00126649 A US 00126649A US 3747575D A US3747575D A US 3747575DA US 3747575 A US3747575 A US 3747575A
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US
United States
Prior art keywords
engine
pulses
transistor
voltage
pulse
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.)
Expired - Lifetime
Application number
US00126649A
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English (en)
Inventor
H Eisele
W Reichardt
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
Priority claimed from DE19702015183 external-priority patent/DE2015183C3/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3747575A publication Critical patent/US3747575A/en
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
    • F02D41/30—Controlling fuel injection
    • F02D41/32—Controlling fuel injection of the low pressure type

Definitions

  • a resistor R12 connects the base of the following switching transistor T5 to the collector of transistor T4.
  • Transistor T5 is normally nonconductive, and when conductive it quickly charges a capacitor C4 through diode D1.
  • the capacitor C4 and its parallel-connected discharged resistor R15 are shunted across the collector resistor R14 of the transistor T5.
  • the voltage appearing across the capacitor C4 during the charging and discharging of the latter is used to form the control voltage U
  • a transistor T6, connected emitter-follower, conducts this voltage to the junction H of the voltage divider R1 and R2.
  • the collector of the transistor T6 is connected directly to the positive rail 21 and the base is connected by a diode D2 to the capacitor C4.
  • the transistors T7 and T9 are conductive, and the transistor T8 is non-conductive.
  • the plate of the capacitor C6 connected to the base of transistor T9 is charged strongly negative with respect to the other plate of the capacitor.
  • the multivibrator output transistor T2 is conductive and its collector is brought nearly to ground potential, which fact causes the charge on the capacitor C6 to cut off the transistor T9, thereby rendering transistor T8 conductive and the switching transistor T7 also nonconductive.
  • the switch K1,K2 is operated by means of its mechanical linkage to the accelerator 17 or to the throttle valve 18.
  • this switch can be operated at the change from partial load to full-load-operation in still other ways.
  • the change in a physical magnitude during the change to full-load operation such as the great fall in air pressure in the intake manifold 3.
  • a pressure box for example, can be connected to the intake manifold, the diaphragm of the box being subjected on one face to the pressure in the manifold, and on the other face to the outside air pressure.
  • the switch K1,I(2 can be opened, or closed.
  • a control circuit for regulating the open period of at least one fuel injection valve of an internal combustion engine comprising, in combination, trigger circuit means for producing electric valve-opening pulses for opening the fuel injection valve; regulating circuit means connected to said trigger circuit means for varying the pulse-duration of-said valve-opening pulses in dependence upon at least one engine operating conditionaccording to a first predetermined functional relationship; and compensating means, operative only after a predetermined time delay relative to the beginning of each valve-opening pulse, for altering said regulating circuit in such a manner as to effect a changeover to a second predetermined functional relationship appropriate for full-load operation of said engine, said compensating means accordingly participating in the determination of the pulse-duration .of valve-opening pulses only when such valve-opening pulses have a duration exceeding said predetermined time delay.
  • said trigger circuit is a monostable multivibrator.

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)
US00126649A 1970-03-28 1971-03-22 Load dependent control circuit for a gasoline fuel injection unit Expired - Lifetime US3747575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702015183 DE2015183C3 (de) 1970-03-28 Lastabhängige Steuereinrichtung für eine Benzineinspritzanlage

Publications (1)

Publication Number Publication Date
US3747575A true US3747575A (en) 1973-07-24

Family

ID=5766684

Family Applications (1)

Application Number Title Priority Date Filing Date
US00126649A Expired - Lifetime US3747575A (en) 1970-03-28 1971-03-22 Load dependent control circuit for a gasoline fuel injection unit

Country Status (10)

Country Link
US (1) US3747575A (enrdf_load_stackoverflow)
AT (1) AT309904B (enrdf_load_stackoverflow)
BE (1) BE764928A (enrdf_load_stackoverflow)
BR (1) BR7100575D0 (enrdf_load_stackoverflow)
CS (1) CS151086B2 (enrdf_load_stackoverflow)
ES (1) ES389642A1 (enrdf_load_stackoverflow)
FR (1) FR2083853A5 (enrdf_load_stackoverflow)
GB (1) GB1281495A (enrdf_load_stackoverflow)
NL (1) NL7104110A (enrdf_load_stackoverflow)
PL (1) PL76516B1 (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835825A (en) * 1969-11-21 1974-09-17 Brico Eng Internal combustion engines
US3875907A (en) * 1972-10-19 1975-04-08 Bosch Gmbh Robert Exhaust gas composition control system for internal combustion engines, and control method
USRE29060E (en) * 1970-01-20 1976-12-07 The Bendix Corporation Circuit for providing electronic warm-up enrichment fuel compensation which is independent of intake manifold pressure in an electronic fuel control system
US4015563A (en) * 1974-09-23 1977-04-05 Robert Bosch G.M.B.H. Stabilized fuel injection system
US4148283A (en) * 1976-07-19 1979-04-10 Nippondenso Co., Ltd. Rotational speed detecting apparatus for electronically-controlled fuel injection systems
WO1981001866A1 (en) * 1979-12-31 1981-07-09 Acf Ind Inc Air-fuel ratio control apparatus
US4724816A (en) * 1986-04-29 1988-02-16 Mitsubishi Denki Kabushiki Kaisha Fuel control device for internal combustion engine
US4785784A (en) * 1986-11-18 1988-11-22 Nissan Motor Co., Ltd. Fuel injection control system for internal combustion engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3483851A (en) * 1966-11-25 1969-12-16 Bosch Gmbh Robert Fuel injection control system
US3515104A (en) * 1967-07-12 1970-06-02 Bosch Gmbh Robert Electromagnetically controlled fuel injection arrangement for internal combustion engines
US3521606A (en) * 1967-10-21 1970-07-28 Bosch Gmbh Robert Fuel injection control arrangement for internal combustion engines
US3543734A (en) * 1967-02-08 1970-12-01 Ass Eng Ltd Fuel injection systems
US3620196A (en) * 1969-09-04 1971-11-16 Bosch Gmbh Robert Arrangement for applying fuel injection corrections as a function of speed, in internal combustion engines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3483851A (en) * 1966-11-25 1969-12-16 Bosch Gmbh Robert Fuel injection control system
US3543734A (en) * 1967-02-08 1970-12-01 Ass Eng Ltd Fuel injection systems
US3515104A (en) * 1967-07-12 1970-06-02 Bosch Gmbh Robert Electromagnetically controlled fuel injection arrangement for internal combustion engines
US3521606A (en) * 1967-10-21 1970-07-28 Bosch Gmbh Robert Fuel injection control arrangement for internal combustion engines
US3620196A (en) * 1969-09-04 1971-11-16 Bosch Gmbh Robert Arrangement for applying fuel injection corrections as a function of speed, in internal combustion engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Aircraft Carburetion Thorner 1947 Pages 38 41, 82 85. *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835825A (en) * 1969-11-21 1974-09-17 Brico Eng Internal combustion engines
USRE29060E (en) * 1970-01-20 1976-12-07 The Bendix Corporation Circuit for providing electronic warm-up enrichment fuel compensation which is independent of intake manifold pressure in an electronic fuel control system
US3875907A (en) * 1972-10-19 1975-04-08 Bosch Gmbh Robert Exhaust gas composition control system for internal combustion engines, and control method
US4015563A (en) * 1974-09-23 1977-04-05 Robert Bosch G.M.B.H. Stabilized fuel injection system
US4148283A (en) * 1976-07-19 1979-04-10 Nippondenso Co., Ltd. Rotational speed detecting apparatus for electronically-controlled fuel injection systems
WO1981001866A1 (en) * 1979-12-31 1981-07-09 Acf Ind Inc Air-fuel ratio control apparatus
US4724816A (en) * 1986-04-29 1988-02-16 Mitsubishi Denki Kabushiki Kaisha Fuel control device for internal combustion engine
US4785784A (en) * 1986-11-18 1988-11-22 Nissan Motor Co., Ltd. Fuel injection control system for internal combustion engine

Also Published As

Publication number Publication date
AT309904B (de) 1973-09-10
FR2083853A5 (enrdf_load_stackoverflow) 1971-12-17
BR7100575D0 (pt) 1973-05-31
PL76516B1 (enrdf_load_stackoverflow) 1975-02-28
DE2015183A1 (de) 1971-10-21
NL7104110A (enrdf_load_stackoverflow) 1971-09-30
ES389642A1 (es) 1973-06-16
GB1281495A (en) 1972-07-12
DE2015183B2 (de) 1976-01-02
BE764928A (fr) 1971-08-16
CS151086B2 (enrdf_load_stackoverflow) 1973-09-17

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