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Title:
FUEL INJECTION CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JPH05312080
Kind Code:
A
Abstract:

PURPOSE: To make sure of safety by securing a driving function in the irreducible minimum of necessity in a way of being selected to control over a limp home circuit at the time of something wrong with the system, while interrupting a fuel supply to an engine forcibly at a time when engine speed has exceeded the specified value.

CONSTITUTION: A sleeve target position signal outputted out of a central processing unit 1 is inputted into a servo circuit 3 which emits a duty specific signal of a governor driving pulse. In addition, this central processing unit 1 is provided with a built-in watch dog timer 5 or external watch dog 7 for detecting this operating malfunction, and a reset signal outputted from these elements is inputted into a switch select circuit 9. In this case, the duty specific signal outputted out of an analog limp home circuit 13 and a fuel-cut signal are inputted into two select switches 15 and 17. In succession, the signal selected by these switches 15, 17 is inputted into an overrun-proof circuit 19, thereby outputting each driving pulse of a governor and a fuel-cut valve.


Inventors:
SEKIGUCHI REI
KITANO YUICHI
KURIHARA KAZUMASA
SHINAGAWA MASAHIKO
Application Number:
JP14332192A
Publication Date:
November 22, 1993
Filing Date:
May 08, 1992
Export Citation:
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Assignee:
ZEXEL CORP
International Classes:
F02D41/14; F02D31/00; F02D41/22; F02D41/26; F02D41/38; F02D41/40; (IPC1-7): F02D41/22; F02D41/14; F02D41/40
Attorney, Agent or Firm:
Masayuki Kushibuchi (1 person outside)



 
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