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:
Oct. 14, 1997
Filed:
Apr. 27, 1995
Applicant:
Inventor:
Shigeki Kondo, Himeji, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ; F02D / ; G01R / ;
U.S. Cl.
CPC ...
364424034 ; 364424039 ; 364424053 ; 364483 ; 361 18 ; 361 92 ; 340663 ;
Abstract
An on-vehicle electronic controller which controls the operation of a device of an automobile or an internal combustion engine is disclosed. A relay intermittently supplies power to a controlled apparatus. The controller first causes the apparatus to be operated for a predetermined period of time while the relay is off, thus ensuring that any residual voltage at the relay terminal is discharged. After the predetermined time, the relay terminal voltage is compared to a predetermined voltage. If the voltage is greater than the predetermined voltage, it is determined that the relay is welded shut.