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:
Apr. 21, 2009
Filed:
Oct. 26, 2007
Mitsujiro Mochizuka, Tokyo, JP;
Kentaro Matsuo, Saitama, JP;
Takahiro Yamazaki, Tokyo, JP;
Shigeru Sato, Saitama, JP;
Mitsujiro Mochizuka, Tokyo, JP;
Kentaro Matsuo, Saitama, JP;
Takahiro Yamazaki, Tokyo, JP;
Shigeru Sato, Saitama, JP;
Kioritz Corporation, Tokyo, JP;
Abstract
A cylinder bore () of a two-stroke internal combustion engine () has first scavenging ports () and second scavenging ports () inside. The first scavenging ports () are nearer to an exhaust port () of the engine () than the second scavenging ports (). In each scavenging stroke, the second scavenging ports () are opened earlier than the first scavenging ports () and introduce fuel-free air (A) from the second scavenging ports () into a combustion chamber (). The first scavenging ports () are opened later and introduce an air-fuel mixture (M) pre-compressed in a crank chamber () into the same combustion chamber (). Thus, harmful substances contained in exhaust gas discharged from the engine () are reduced.