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:
Feb. 23, 1988
Filed:
Mar. 28, 1986
Applicant:
Inventors:
Masatoshi Hasegawa, Kakegawa, JP;
Keiichi Sugiyama, Shizuoka, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123432 ; 1231 / ; 123 / ;
Abstract
Several embodiments of induction systems for internal combustion engines wherein each chamber of the engine is served by a relatively long low speed induction passage and a relatively short high speed induction passage. The arrangements of the passages is such that the change in length is achieved quite simply by positioning a throttle valve at the upstream end of the short induction passage and having both passages communicate with an air inlet device. Several embodiments of throttle valve arrangements are also disclosed wherein a single throttle valve can control the flow through two adjacent induction passages.