GB1291799A - Improvements in and relating to internal combustion engine fuel injection systems - Google Patents

Improvements in and relating to internal combustion engine fuel injection systems

Info

Publication number
GB1291799A
GB1291799A GB37004/71A GB3700471A GB1291799A GB 1291799 A GB1291799 A GB 1291799A GB 37004/71 A GB37004/71 A GB 37004/71A GB 3700471 A GB3700471 A GB 3700471A GB 1291799 A GB1291799 A GB 1291799A
Authority
GB
United Kingdom
Prior art keywords
pulse
duration
prolongation
stage
basic
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
Application number
GB37004/71A
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 GB1291799A publication Critical patent/GB1291799A/en
Expired legal-status Critical Current

Links

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

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)

Abstract

1291799 Fuel injection systems ROBERT BOSCH GmbH 6 Aug 1971 [8 Aug 1970] 37004/71 Heading G1N In an I.C. engine fuel injection control system, the duration of each opening pulse of at least one electromagnetic injection valve is determined by a basic opening pulse provided by a monostable multi-vibrator 25 and a prolongation pulse added at the end of the basic pulse, the prolongation pulse being provided by a stage 27 and having a duration dependent upon the preceding basic pulse, a correcting stage 30 being provided and including a monostable switching stage which is triggered at the end of each basic pulse to influence the prolongation stage for the duration of its unstable state, its influence being variable to vary the duration of the prolongation pulse by a voltage divider 91, 92, 93 so as to adjust for manufacturing tolerances in various sensors of the system. As shown, the duration of the prolongation pulse is determined by the discharge time of a capacitor 60, which is charged during the basic pulse, the correcting stage 30 influencing the discharge current during its unstable state, which is constant and shorter than the duration of the prolongation pulse.
GB37004/71A 1970-08-08 1971-08-06 Improvements in and relating to internal combustion engine fuel injection systems Expired GB1291799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702039486 DE2039486A1 (en) 1970-08-08 1970-08-08 Fuel injection system with electronic control device

Publications (1)

Publication Number Publication Date
GB1291799A true GB1291799A (en) 1972-10-04

Family

ID=5779221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37004/71A Expired GB1291799A (en) 1970-08-08 1971-08-06 Improvements in and relating to internal combustion engine fuel injection systems

Country Status (9)

Country Link
US (1) US3741171A (en)
BR (1) BR7104966D0 (en)
CS (1) CS151404B2 (en)
DE (1) DE2039486A1 (en)
ES (1) ES394005A1 (en)
FR (1) FR2101587A5 (en)
GB (1) GB1291799A (en)
PL (1) PL77772B1 (en)
SE (1) SE361706B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896773A (en) * 1972-10-27 1975-07-29 Gen Motors Corp Electronic fuel injection system
US3824967A (en) * 1972-10-30 1974-07-23 Gen Motors Corp Electronic fuel injection system
DE2410090C2 (en) * 1974-03-02 1986-07-31 Robert Bosch Gmbh, 7000 Stuttgart Switching device for the hot start of internal combustion engines with electronically controlled fuel injection
DE2605059C2 (en) * 1976-02-10 1984-11-22 Robert Bosch Gmbh, 7000 Stuttgart Fuel injection system for an internal combustion engine
DE2700628A1 (en) * 1977-01-08 1978-07-20 Bosch Gmbh Robert METHOD AND DEVICE FOR CORRECTING THE DURATION OF INJECTION PULSES SUPPLIED BY ELECTROMAGNETIC INJECTION VALVES, DEPENDING ON THE LOAD STATE

Also Published As

Publication number Publication date
PL77772B1 (en) 1975-04-30
ES394005A1 (en) 1974-08-16
BR7104966D0 (en) 1973-06-07
SE361706B (en) 1973-11-12
CS151404B2 (en) 1973-10-19
FR2101587A5 (en) 1972-03-31
US3741171A (en) 1973-06-26
DE2039486A1 (en) 1972-02-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee