STRATIFIED SCAVENGING TWO-CYCLE ENGINE WITH CATALYST

Title:

STRATIFIED SCAVENGING TWO-CYCLE ENGINE WITH CATALYST

Document Type and Number:

WIPO Patent Application WO/2001/025604

Kind Code:

A1

Abstract:

A stratified scavenging two-cycle engine with catalyst capable of meeting, using catalyst, such a requirement that THC exhaust rate must be 54 g/kw • h or less, wherein an air feed volume ratio R of an air feed volume (qa) flowing through an air feed flow passage (24) to a mixed air feed volume (Qf) flowing through a mixed air feed flow passage (20) is within the range of 0.7 ≤ R ≤ 1.4 during a suction stroke where a crank chamber (8) is decompressed to a negative pressure and an oxidation catalyst (47) is disposed midway in an exhaust passage on the downstream side of an exhaust hole (14).

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Inventors:

MIYAJIRI YASUTSUNE (JP)
SAWADA TOSHIHARU (JP)

Application Number:

PCT/JP2000/006879

Publication Date:

April 12, 2001

Filing Date:

October 03, 2000

Export Citation:

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Assignee:

KOMATSU ZENOA KK (JP)
MIYAJIRI YASUTSUNE (JP)
SAWADA TOSHIHARU (JP)

International Classes:

F01N3/24; F01N3/28; F01N1/08; F02B25/14; F02B25/22; F02B33/04; F02B33/30; F02B33/44; F02B75/10; F02B75/16; F02B75/02; (IPC1-7): F01N3/28; F02B25/22

Foreign References:

JPH11107761A	1999-04-20
JPH03233127A	1991-10-17
JPS61149716U	1986-09-16
JPS60108530A	1985-06-14
DE19520944A1	1996-01-11

Attorney, Agent or Firm:

Matsuzawa, Osamu (Uchikanda 1-chome Chiyoda-ku, Tokyo, JP)

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