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:
Sep. 16, 2014
Filed:
Feb. 03, 2011
Ryou Ono, Sayama, JP;
Mikihiro Asahina, Shiki, JP;
Ryou Ono, Sayama, JP;
Mikihiro Asahina, Shiki, JP;
Husqvarna Zenoah Co., Ltd., Kawagoe-shi, JP;
Abstract
A stratified scavenging two-stroke engine includes: a crankcase (); a cylinder () being provided with a cylinder bore (); an intake passage () supplying air-fuel mixture into the crankcase () via an intake port (A); a scavenging passage () supplying the air-fuel mixture from the crankcase () into the cylinder bore () via a scavenging port (A); a leading-air passage () supplying leading air into the scavenging passage (); and an exhaust passage () being disposed on an opposite side of the intake passage () with the cylinder bore () interposed therebetween, the exhaust passage () discharging exhaust gas via an exhaust port, in which the scavenging passage () includes a main passage () provided near the exhaust port and a sub passage () provided near the intake port (A), the main passage () and the sub passage () are isolated from each other by a partition () that extends over substantially an entire length of the main passage () and the sub passage (), the sub passage () includes an air-fuel mixture inlet () provided at a position corresponding to an opening end () of the cylinder bore () that faces the crankcase (), and the inlet () functions as a flow rate adjuster having a throttle effect.