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. 27, 2010
Filed:
Jan. 19, 2007
Motoki Tatsumi, Isesaki, JP;
Kazuhiko Abe, Yokohama, JP;
Mitsuhiko Kubota, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electronic control apparatus for a vehicle having an engine control unitcontrolling an electronically-controlled throttle of an engine and a valve control unitcontrolling a variable lift mechanismthat varies a lift amount of an intake valve are provided. Information of a target lift amount and an actual lift amount is transmitted/received between these control units. Each of the control units diagnoses a state of data transmission from the other control unit, transmits the diagnosis result to the other control unit and, when the diagnosis result of itself and/or the diagnosis result of the other control unit shows an abnormal state, moves to the mode of a fail-safe operation.