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, 2002
Filed:
Aug. 15, 2001
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A valve timing control system for an internal combustion engine for improving engine starting performance by controlling an actuator to a lock-up position upon stopping of the engine and fixing the actuator positively at the lock-up position by a locking mechanism. The control system ( A) includes a power supply interruption detecting means ( ) for detecting a time point when electric power supply is interrupted, a desired valve timing setting means ( A) for setting a desired valve timing (VTo) on the basis of engine operation state (D), and an actual valve timing control means ( A) for driving the actuator ( ) so that the actual valve timing (VTA) coincides with the desired valve timing (VTo). An oil supply means ( ) for supplying a hydraulic pressure to the actuator is controlled over a predetermined time period from the power supply interruption time point in response to a result of detection of the power supply interruption detecting means ( ) for thereby allowing the actuator ( ) to be retained at the lock-up position.