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:
Nov. 28, 2000
Filed:
Feb. 16, 1999
Komatsu Zenoah Co., Tokyo, JP;
Abstract
A stratified scavenging two-cycle engine, having excellent scavenging performance and a simple structure which can be manufactured at low cost, includes a cast cylinder block (2, 2a) containing a cylinder chamber (9) and two scavenging ports (14, 14, 14a, 14a), which are provided in opposite portions of the interior wall surface of the cylinder chamber (9). Each scavenging port (14, 14a) and the crank chamber (7) are connected via a scavenging flow passage (20) which includes a generally horizontally extending scavenging flow passage segment (22, 22a) and a generally vertically extending scavenging flow passage segment (21). Two recesses (23, 23, 23a, 23a) are provided in the outer surface of the cylinder block (2, 2a) with each recess being an outwardly directed extension of a respective horizontally extending scavenging flow passage segment. An air supply flow passage member (30, 30a) is attached to the cylinder block to cover a respective recess. Each scavenging flow passage (20) and an air supply flow passage (31) are connected through a check valve (32).