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:
Jul. 19, 1991
Applicant:
Inventor:
Yoshiharu Isaka, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ; F02M / ; F02M / ; F02N / ;
U.S. Cl.
CPC ...
12317917 ; 12317918 ; 123509 ; 123533 ; 123 4131 ;
Abstract
A power unit for a small vehicle such as a motorcycle embodying a two-cycle, crankcase compression, air/fuel injected engine. Fuel and air pumps are driven by the engine and are positioned inwardly of the outer extremity of a plane defined by the outer face of the clutch of the engine transmission assembly and the adjacent side of the engine. A two speed drive is provided for the air pump of the fuel/air injection system so as to operate the air pump at a higher speed ratio during cranking than during running so as to insure adequate air supply for the engine even during starting.