Title:
ENGINE AND PORTABLE WORKING MACHINE
Document Type and Number:
WIPO Patent Application WO/2014/155945
Kind Code:
A1
Abstract:
An engine that can suppress decrease in a function of causing an unburned gas to remain in a combustion chamber is provided. An engine 12 has a combustion chamber 18 provided inside a cylinder 19, in which an exhaust port 32 connected to the combustion chamber 18 is opened and closed by a piston 22 reciprocating inside the cylinder 19. The engine 12 includes: a first exhaust passage 31 provided in the cylinder 19 and connected to the exhaust port 32; an opening 31a formed on the downstream end of the first exhaust passage 31 in a direction of discharge of a combustion gas discharged from the exhaust port 32; and a second exhaust passage 36 connected to the opening 31a via a connection passage 41. The center E of the connection passage 41 in a cylinder axial direction and the center C of the opening 31a in the cylinder axial direction are arranged at different positions from each other in the cylinder axial direction.
Inventors:
YASUTOMI TOSHINORI (JP)
Application Number:
PCT/JP2014/000835
Publication Date:
October 02, 2014
Filing Date:
February 19, 2014
Export Citation:
Assignee:
HITACHI KOKI KK (JP)
International Classes:
F02B63/02; F01N13/00; F02B25/00
Domestic Patent References:
| WO2012120118A1 | 2012-09-13 |
Foreign References:
| DE202005005328U1 | 2006-08-10 | |||
| US20020040578A1 | 2002-04-11 | |||
| US20020020370A1 | 2002-02-21 | |||
| DE19715947A1 | 1997-11-06 | |||
| JP2012067668A | 2012-04-05 |
Attorney, Agent or Firm:
TSUTSUI, Yamato (3F Shinjuku Gyoen Bldg., 3-10, Shinjuku 2-chome, Shinjuku-k, Tokyo 22, JP)
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