Title:
2サイクル内燃エンジン
Document Type and Number:
Japanese Patent JP3616339
Kind Code:
B2
Abstract:
A two-cycle internal combustion engine which is capable of inhibiting air-fuel mixture from being mixed with the air introduced in advance into the combustion actuating chamber during the scavenging period, thereby realizing a complete lamellar scavenging. This engine is constructed such that one or more pairs of Schnürle type scavenging passageways (31, 32), each allowing the combustion actuating chamber (15) disposed above a piston (20) placed in a cylinder (10) to be communicated with the crank chamber (18), are symmetrically provided on both sides of a longitudinal section (F-F) which imaginatively divides an exhaust port (34) into two equal parts, thereby enabling air (A) to be introduced into the scavenging passageways (31, 32) and also enabling an air-fuel mixture (M) to be introduced into the crank chamber (18); and that in the descending stroke of the piston (20), the exhaust port (34) is opened at first, and then, the scavenging port which is disposed at a downstream end of the scavenging passageway is opened, thereby enabling air (A) to be introduced via the scavenging passageway into the combustion actuating chamber (15) prior to the introduction of air-fuel mixture (M) into the combustion actuating chamber (15); said internal combustion engine being characterized in that said one or more pairs of Schnürle type scavenging passageways (31, 32) are respectively provided, near the end portion thereof located close to the crank chamber (18), with a throttled portion (31e, 32e).
Inventors:
Tsuneo Araki
Application Number:
JP2001026100A
Publication Date:
February 02, 2005
Filing Date:
February 01, 2001
Export Citation:
Assignee:
Kyoritsu Co., Ltd.
International Classes:
F02M19/00; F02B17/00; F02B25/16; F02B25/20; F02B25/22; F02B33/04; F02B33/30; F02B63/02; F02B75/16; F02M35/108; F02B1/04; F02B75/02; F02M35/10; (IPC1-7): F02B25/22; F02B17/00; F02B25/16; F02B25/20; F02M19/00
Domestic Patent References:
| JP10121973A | ||||
| JP58113824U | ||||
| JP11303639A | ||||
| JP58005424A |
Attorney, Agent or Firm:
Yusuke Hiraki
Sekiya Mitsuo
Sekiya Mitsuo