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:
Dec. 27, 1983
Filed:
Jun. 26, 1981
Applicant:
Inventors:
Assignee:
Yamaha Motor Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123 / ; 123 / ;
Abstract
Two embodiments of induction systems for internal combustion engines that improve charging efficiency, particularly at low speeds and throttle openings. In each embodiment a plenum chamber is provided that communicates with the induction system between the throttle valve and the chamber which is served. In each embodiment a control valve controls the communication of the plenum chamber with the induction passage for substantially restricting the communication when the throttle valve of the engine is in its wide open position.