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:
Oct. 19, 1993
Filed:
Aug. 07, 1991
Applicant:
Inventors:
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123 / ; 123 / ;
Abstract
Several embodiments of engine intake systems that improve the charging efficiency by providing a closed branch passage which forms a volume in the intake tract between the throttle valve and the point of discharge into an engine chamber. The illustrated embodiments of the application of this concept is to both four and two cycle engines. In addition, a plenum chamber is illustrated for permitting the effective volume of the branch passage to be increased without unduly increasing its length. The branch passage outlet in certain embodiments is oriented so that its discharge during the intake cycle increases turbulence to improve combustion efficiency.