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. 18, 2003
Filed:
Jul. 15, 2002
Applicant:
Inventors:
Yasutsune Miyajiri, Kawagoe, JP;
Toshiharu Sawada, Kawagoe, JP;
Assignee:
Komatsu Zenoah Co., Kawagoe, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/10 ;
U.S. Cl.
CPC ...
F01N 3/10 ;
Abstract
A stratified scavenging two-cycle engine with catalyst capable of meeting such a requirement that a THC exhaust rate is 54 [g/kW·h] or less with use of catalyst. For this purpose, in the stratified scavenging two-cycle engine in which an air feed volume ratio R of an air feed volume (qa) flowing through the air feed passage ( ) to a mixture feed volume (Qf) flowing through the mixture feed passage ( ) is within a range of 0.7≦R≦1.4 during an intake stroke in which the crank chamber ( ) becomes negative pressure, oxidation catalyst ( ) is placed midway in an exhaust passage in a downstream of an exhaust hole ( ).