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muffler for general engine

A general-purpose engine and muffler technology, applied in engine components, machines/engines, mufflers, etc., can solve the problems of difficult manufacturing, complex structure, and increased cost.

Inactive Publication Date: 2019-05-07
KAWASAKI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the muffler disclosed in Japanese Patent Application Laid-Open No. 01-179117, the resin muffler cover is provided with a flow guide. Therefore, if the flow guide is heated due to exhaust, the resin may melt.
In addition, in the muffler disclosed in Japanese Patent Application No. 56-049221, it is necessary to form a curved tailpipe and tailpipe cover, so manufacturing is difficult and the cost is high.
In addition, the tailpipe and the tailpipe cover are rotated in order to change the emission direction of the exhaust gas, so the structure becomes complicated.

Method used

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Examples

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Embodiment Construction

[0026] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0027] figure 1 A lawnmower 1 as a type of portable work machine is shown, which mounts a general-purpose engine E including a muffler according to an embodiment of the present invention. In the lawn mower 1 , for example, an engine E is attached to the base end of an elongated main pipe 2 made of aluminum alloy, and a rotary cutter 3 as a work tool is attached to the front end. An iron-based drive shaft (not shown) is inserted through the inside of the main pipe 2 , the base end of the drive shaft is connected to the engine E, and the front end is connected to the rotary cutter 3 . A strap 4 for hanging on the shoulder and a U-shaped handle 7 are attached to the main pipe 2 near the engine E. As shown in FIG. The operator hangs the belt 4 on the shoulder to hold the lawnmower 1, and holds the handles 8 at both ends of the handle 7 to work, thereby cutting w...

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PUM

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Abstract

The invention discloses a silencer 20 of a general-purpose engine E. The silencer 20 has a silencer main body 32 which is protrudingly provided with an exhaust hood 54 which covers an exhaust opening 50. A passage hood 60 covers an exit end 54a of the exhaust hood 54 is configured protrudingly in the exhaust direction of the exit end 54a. A flow guide member 69 which changes the direction of an exhaust gas G is mounded at a downstream end 60d of the passage hood 60. An absorbing opening 64 is formed between the exhaust hood 54 and an upstream end 60c of the passage hood 60 for absorbing ambient air. The flow guide member 69 is detachable and rotable supported by the passage hood 60.

Description

technical field [0001] The present invention relates to a muffler for a general-purpose engine used as a drive source of a small work machine such as a lawnmower. Background technique [0002] As a muffler for a general-purpose engine, various structures have been proposed (for example, Japanese Patent Laid-Open No. Hei 01-179117, Japanese Patent Laid-Open No. Sho 56-049221). In the muffler of a general-purpose engine disclosed in JP-01-179117, a resin muffler cover is rotatably equipped with an exhaust air guide, and by rotating the air guide, the direction in which the exhaust gas is released can be adjusted. Change to the desired orientation. In addition, in the muffler of a general-purpose engine disclosed in Japanese Unexamined Application No. 56-049221, a curved tailpipe and a tailpipe cover covering the tailpipe are provided in a rotatable manner, and the flow rate of the exhaust gas is changed by rotating these pipes and covers. release direction. Furthermore, sin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N13/00
CPCF01N13/00F02B63/02
Inventor 汤浅常由
Owner KAWASAKI HEAVY IND LTD