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JPS5669428A - Fuel-cut circuit for electronically controlled fuel injector - Google Patents

Fuel-cut circuit for electronically controlled fuel injector

Info

Publication number
JPS5669428A
JPS5669428A JP14420879A JP14420879A JPS5669428A JP S5669428 A JPS5669428 A JP S5669428A JP 14420879 A JP14420879 A JP 14420879A JP 14420879 A JP14420879 A JP 14420879A JP S5669428 A JPS5669428 A JP S5669428A
Authority
JP
Japan
Prior art keywords
fuel
cut
pulse
engine
electronically controlled
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.)
Pending
Application number
JP14420879A
Other languages
Japanese (ja)
Inventor
Yoshiaki Gokan
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.)
Hitachi Unisia Automotive Ltd
Original Assignee
Japan Electronic Control Systems 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 Japan Electronic Control Systems Co Ltd filed Critical Japan Electronic Control Systems Co Ltd
Priority to JP14420879A priority Critical patent/JPS5669428A/en
Publication of JPS5669428A publication Critical patent/JPS5669428A/en
Pending legal-status Critical Current

Links

Landscapes

  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To precisely perform fuel cut and reinjection control on the basis of an engine running speed by providing a fuel cutting circuit which can cut a fuel and easily measure an engine r.p.m. at which a reinjection is required to be performed.
CONSTITUTION: A pulse length TN1 appearing when a transistor Q4 is on is assumed to be equal to a pulse length TH of a frequency signal (b) which is provided when a fuel is needed to be cut at a certain r.p.m. If an engine r.p.m. is higher than said value, the TH is less than the TN1 so that a basic pulse tp is generated when a transistor Q3 is on. However, as the Q3 is on, by which an output line of a basic pulse oscillation circuit 5 is grounded via a diode D3, the Q3 and a switch 4, the tp is cut in correspondence with a difference between pulse length TH and TN. Thereby, a fuel is cut bases on the cut pulse.
COPYRIGHT: (C)1981,JPO&Japio
JP14420879A 1979-11-07 1979-11-07 Fuel-cut circuit for electronically controlled fuel injector Pending JPS5669428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14420879A JPS5669428A (en) 1979-11-07 1979-11-07 Fuel-cut circuit for electronically controlled fuel injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14420879A JPS5669428A (en) 1979-11-07 1979-11-07 Fuel-cut circuit for electronically controlled fuel injector

Publications (1)

Publication Number Publication Date
JPS5669428A true JPS5669428A (en) 1981-06-10

Family

ID=15356735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14420879A Pending JPS5669428A (en) 1979-11-07 1979-11-07 Fuel-cut circuit for electronically controlled fuel injector

Country Status (1)

Country Link
JP (1) JPS5669428A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6151452U (en) * 1984-09-10 1986-04-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6151452U (en) * 1984-09-10 1986-04-07

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