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. 14, 2007
Filed:
May. 23, 2006
Shirou Yamaguchi, Ome, JP;
Shirou Yamaguchi, Ome, JP;
Kioritz Corporation, Tokyo, JP;
Abstract
In a two-stroke internal combustion engine () using an internal cooling piston (), the piston () has in-piston scavenging passages () defined therein by partition walls (), and lower-end inlets () of the in-piston scavenging passages () are opened downward and narrowed in opening area by piston pin bosses (). In-cylinder scavenging passages (), which are opened and closed as the piston () moves, are supplied with an air-fuel mixture from the narrowed lower-end inlets () through the in-piston scavenging passages (). Thereby, a fresh air-fuel mixture is increased in flow rate when flowing from the in-cylinder scavenging passages () to the combustion chamber (), and the scavenging efficiency of the engine is improved.