The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Dec. 01, 1987

Filed:

May. 30, 1986
Applicant:
Inventors:

Shizuo Yagi, Asaka, JP;

Makoto Kawai, Tokorozawa, JP;

Yorihisa Yamamoto, Shiki, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
123425 ; 73115 ;
Abstract

In a feed-back engine control system in response to an indicative pressure signal representing the inner pressure of the combustion chamber of an internal combustion engine, uncertain states are detected by comparing peak positions appearing in the respective ones of the indicative pressure signal and the filtered indicative pressure signal, thereby to avoid unfavorable operation of the system.


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