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:
Sep. 14, 1993
Filed:
Apr. 15, 1991
Applicant:
Inventor:
Shigeki Morita, Himeji, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
731173 ; 73116 ;
Abstract
The control unit 2 of an automobile includes: a ROM 2b for storing predetermined values representing normal (i.e., warmed-up) operating states of the engine, and a RAM 2c for storing cumulative values of outputs of various sensors. The cumulative values are continually compared with the predetermined values, and failure diagnosis of the engine is effected only when the cumulative values exceed the predetermined values.