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. 11, 1992
Filed:
Oct. 02, 1990
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Abstract
A fuel injection system for a two cycle crankcase compression internal combustion engine including a first injector that supplies fuel directly to the combustion chamber of the engine. An induction system is provided for inducting air into the crankcase chamber of the engine and in a multiple cylinder engine this includes a manifold having a single inlet. A throttle body having a throttle valve controls the flow of air through the inlet and a second fuel injector sprays fuel into the throttle body upstream of the throttle valve and against the throttle valve in certain positions of the throttle valve. In accordance with one disclosed embodiment of the invention, the second fuel injector supplies the fuel requirements for maximum power while the first fuel injector supplies the fuel requirements for low and mid range performance, but does not have adequate capacity to supply all of the fuel for high range performance.