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.
Patent No.:
Date of Patent:
Jun. 04, 1991
Filed:
Aug. 04, 1989
Applicant:
Inventors:
Toshio Manaka, Katsuta, JP;
Masami Shida, Mito, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
36443101 ; 36443105 ; 123436 ; 123478 ;
Abstract
A combustion fault detection apparatus for an internal combustion engine, in which a cylinder signal is generated when the piston in each cylinder of the engine is located at a predetermined position, a time interval between cylinder signal is determined, and time intervals for respective cylinders are compared and computed thereby to detect when a combustion fault, if any, has occurred in a specific cylinder.