STRATIFIED SCAVENGING TWO-STROKE ENGINE

Title:

STRATIFIED SCAVENGING TWO-STROKE ENGINE

Document Type and Number:

WIPO Patent Application WO/2012/104919

Kind Code:

A1

Abstract:

A stratified scavenging two-stroke engine includes: a crankcase (2); a cylinder (3) being provided with a cylinder bore (31); an intake passage (4) supplying air-fuel mixture into the crankcase (2) via an intake port (4A); a scavenging passage (5) supplying the air-fuel mixture from the crankcase (2) into the cylinder bore (31) via a scavenging port (5A); a leading-air passage (6) supplying leading air into the scavenging passage (5); and an exhaust passage (7) being disposed on an opposite side of the intake passage (4) with the cylinder bore (31) interposed therebetween, the exhaust passage (7) discharging exhaust gas via an exhaust port, in which the scavenging passage (5) includes a main passage (51) provided near the exhaust port and a sub passage (52) provided near the intake port (4A), the main passage (51) and the sub passage (52) are isolated from each other by a partition (25, 34) that extends over substantially an entire length of the main passage (51) and the sub passage (52), the sub passage (52) includes an air-fuel mixture inlet (55) provided at a position corresponding to an opening end (35) of the cylinder bore (31) that faces the crankcase (2), and the inlet (55) functions as a flow rate adjuster having a throttle effect.

More Like This:

JPS59153917	TWO-CYCLE ENGINE
JPH10505147	INDUSTRIAL APPLICABILITY A two-stroke engine having an improved injection device and an injection method thereof.

Inventors:

ONO RYOU (JP)
ASAHINA MIKIHIRO (JP)

Application Number:

PCT/JP2011/000611

Publication Date:

August 09, 2012

Filing Date:

February 03, 2011

Export Citation:

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Assignee:

HUSQVARNA ZENOAH CO LTD (JP)
ONO RYOU (JP)
ASAHINA MIKIHIRO (JP)

International Classes:

F02B33/04; F02B25/14; F02B25/16; F02B77/00; F02F3/24

Domestic Patent References:

WO2009078452A1

2009-06-25

Foreign References:

JP2008138602A	2008-06-19
US20020104493A1	2002-08-08
JPH11315722A	1999-11-16
EP1482146A2	2004-12-01
US3815558A	1974-06-11
EP2278137A2	2011-01-26
JP2008138602A	2008-06-19

Attorney, Agent or Firm:

KINOSHITA & ASSOCIATES (Ogikubo TM building 26-13, Ogikubo 5-chome, Suginami-k, Tokyo 51, JP)

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