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:
Aug. 10, 1993
Filed:
Aug. 20, 1992
Atsushi Umemoto, Saitama, JP;
Kazuji Ono, Saitama, JP;
Kiwamu Bushimata, Saitama, JP;
Iwao Kadota, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A valve operating system in a multicylinder internal combustion engine, including an air pressure chamber biasing each engine valve in a closed direction thereof. The air pressure chambers are formed in a member positioned between the engine valves and the cam shaft and the member is formed with an air supply passage connected to the air pressure chambers for supplying air thereto and a relief passage connected to the air pressure chambers for releasing air therefrom. Air relief valves are provided in the member for individually releasing air from the air pressure chambers to the relief passage. A pressure control valve is connected to the relief passage for controlling pressure in the air pressure chambers for improving the accuracy of the operation of the relief valves and the control of the pressure in each the plurality of air pressure chambers.