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. 21, 1998
Filed:
Aug. 15, 1997
Shinji Kamimaru, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An electromagnetically operated valve driving system for driving an intake or exhaust valve of an engine comprises an opening solenoid, a closing solenoid, and a control apparatus for energizing or deenergizing these opening and closing solenoids. Springs are provided in order to balance a valve body on a specified position between the fully open and fully closed positions. Further, when the intake or exhaust valve is closed, the closing solenoid is deenergized for a very short time immediately before the intake or exhaust valve is fully closed so as to reduce a traveling speed of the valve body when said valve body is seated. Also, when the intake or exhaust valve is opened, the opening solenoid is deenergized for a very short time immediately before the intake or exhaust valve is fully opened so as to reduce a traveling speed of the valve body when the valve body is fully opened.