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Title:
ENGINE WORKING MACHINE
Document Type and Number:
Japanese Patent JP2013007317
Kind Code:
A
Abstract:

To provide an engine working machine, which is capable of reducing an exhaust sound while maintaining product dimensions and an engine output comparable to those of a conventional machine, and which is also capable of reducing a vibration sound generated by vibration of a muffler side face.

An engine 36 is configured in such a manner that: a driving shaft direction of the engine 36 (Y direction), an opening direction of an exhaust port (Z direction), and an operation direction of a piston (X direction) are substantially perpendicular to one another; a muffler 4 is fastened to a proximity of an exhaust port 24 of the engine 36; the muffler 4 has a vertically long shape extended downward lower than a plane 72 passing on a lower end of a cylinder; and the muffler is provided with a protrusion 32 protruding in a direction toward the center of the engine 36, which secures a volume corresponding to a space 64. Since the muffler 4 is greatly extended downward, a fuel tank 22 is placed offset to a left side (-Z direction) and extended in a left end upward as shown by an arrow 80, which secures a volume corresponding to a space 68.


Inventors:
ICHIHASHI NAOTO
Application Number:
JP2011140152A
Publication Date:
January 10, 2013
Filing Date:
June 24, 2011
Export Citation:
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Assignee:
HITACHI KOKI KK
International Classes:
F01N1/00; F01N1/08; F01N3/24; F01N13/00; F01N99/00; F02B67/00
Domestic Patent References:
JP2007528792A2007-10-18
JPH10212939A1998-08-11
JP2009156158A2009-07-16
JP2002522685A2002-07-23
JP2002242666A2002-08-28
Attorney, Agent or Firm:
Shinichi Kakubo