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. 28, 2001
Filed:
Dec. 10, 1999
Tanaka Kogyo Co., Ltd., Chiba, JP;
Abstract
A two-cycle engine includes scavenging passages on the cylinder side and the crankcase side as the passages to supply scavenging gas into the cylinder. The passage on the cylinder side includes a passage inside the cylinder sidewall having substantially the same inner diameter as that of the opening area of the scavenging charge port, while the passage on the crankcase side includes a space between the inner peripheral surface at the top end of the crankcase and the outer peripheral surface of the piston, and a connection means provided between the top end of the space and the lower end of the scavenger passage of the cylinder. As the fuel mixture in the crank chamber flows into the scavenging passage on the cylinder side through the narrow space of the passage on the crankcase side and the connection means, the rapid inflow of the fuel mixture into the cylinder is restrained and the supply of the fuel mixture is sustained constantly high until the latter half of the scavenging time. This enables an optimum supply of fuel mixture, and radically decreases the amount of unburned gas in the fuel mixture that is emitted with the exhaust gas.