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:
Jul. 25, 1989
Filed:
Jan. 12, 1989
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A fault detection system for detecting a fault of a subcontrol apparatus as well as a main control apparatus backed up thereby in controlling the operation of an actuator for an internal combustion engine control apparatus such as a throttle control apparatus is disclosed. A second fault detection apparatus for the subcontrol apparatus is made up of a CPU consituting the main control apparatus, so that the fault detection apparatus for the subcontrol apparatus operates under condition that the main control apparatus is normal and the engine is preferably under a light load of operation. Each of the main control and the backup subcontrol apparatuses includes a fault detection apparatus, thereby preventing simultaneous fault of the two control apparatuses for improved safety of the vehicle drive.