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Two stroke engine muffler

An engine and muffler technology, applied in engine components, machines/engines, mufflers, etc., can solve the problems of great influence on power and economic performance, high surface temperature of mufflers, poor creep fatigue resistance, etc. Small impact on economic performance, good creep fatigue resistance and good thermal shock resistance

Active Publication Date: 2016-04-20
ZHEJIANG ZOMAX GARDEN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the existing two-stroke engine mufflers have the following disadvantages: (1) high surface temperature of the muffler; (2) great impact on power and economic performance; (3) poor creep fatigue resistance; (4) Poor thermal shock performance; (5) Poor mechanical durability

Method used

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  • Two stroke engine muffler
  • Two stroke engine muffler

Examples

Experimental program
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Effect test

Embodiment 1

[0019] figure 1 It is a schematic diagram of the internal structure of the muffler of a preferred embodiment of the present invention. A muffler in a preferred embodiment of the present invention includes a front shell 1, a partition plate 2, a rear shell 3, an exhaust pipe 4, a heat shield 5, a bolt pressing plate 6, a bolt conduit 7, a catalyst component 8 and an air inlet.

[0020] The edges of the front shell 1 and the rear shell 3 are fixed together by riveting and welding to form a chamber, and the partition plate 2 is located between the front shell 1 and the rear shell 3 to divide the above chamber into two parts, the partition plate 2 and the front shell 1 forms the intake cavity, and the partition 2 and the rear shell 3 form the exhaust cavity. The front shell 1, the partition plate 2 and the rear shell 3 are all made of stainless steel. The partition plate 2 is recessed into the air intake cavity, so that the shape and volume ratio of the muffler intake cavity and...

Embodiment 2

[0031] In the above embodiment, the inventor found that although the muffler achieves a very good noise reduction effect and reduces the harmful gas content in the exhaust emission during engine operation, the vibration phenomenon is relatively obvious, which has an adverse effect on the life of the machine. The inventor found by accident that the vibration of the muffler can be significantly eliminated by changing the connection portion 21 between the partition plate 2 and the front shell 1 and the rear shell 3 from a rigid connection to an elastic connection. Therefore, in this embodiment, the connection portion 21 between the partition plate 2 and the front case 1 and the rear case 3 is configured to be elastically connected. In this embodiment, without changing the material of the partition 2 and adding new parts, only setting the connecting portion 21 in a wave shape can achieve a very good effect of eliminating vibration.

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PUM

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Abstract

The invention discloses a silencer of a two-stroke engine. The silencer of the two-stroke engine comprises a front shell, a clapboard and a rear shell, and is characterized in that the front shell and the rear shell are matched; the clapboard is arranged between the front shell and the rear shell, and fixed with front shell and the rear shell so as to form an air inlet cavity and an air exhaust cavity; a catalytic agent component is arranged on the clapboard; the catalytic agent component is communicated with the air inlet cavity and the air exhaust cavity; a heat shield is arranged in the air exhaust cavity; the heat shield is fixedly arranged on the clapboard and covers the catalytic agent component; a vent hole is formed in the heat shield; the catalytic agent component comprises a carrier and an enclosure; the carrier comprises curved plates and corrugated plates; the ends of the curved plates are fixedly arranged on the enclosure of the carrier; the surfaces of the curved plates are coated with catalyst playing a role in cleaning up tail gas. Due to low surface temperature, minor influence on power and economic performance, good creep and fatigue resistance, good heat shock resistance and good mechanical durability, the silencer disclosed by the invention can be widely applied in agricultural production.

Description

technical field [0001] The invention relates to a muffler, in particular to a muffler for a two-stroke engine. Background technique [0002] Two-stroke engines are widely used in low power devices such as chain saws, hedge shears, lawn mowers, motorcycles, etc. Due to the incomplete combustion of the fuel and the lubricating oil added to the fuel in a certain proportion, the two-stroke engine will emit a large amount of harmful exhaust gas during use, and its exhaust emission cannot meet the requirements of EUII and EPA emission standards. Exhaust exhaust gas undergoes secondary purification. [0003] The muffler of the two-stroke engine in the prior art is likely to cause high surface temperature of the muffler and large power loss; and the concentric circle carrier honeycomb catalyst or wire mesh catalyst is installed in the muffler, or no catalyst is installed, and the exhaust gas purification effect is poor. When the engine is working, due to the vibration of the machi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/28F01N13/00
Inventor 黄步新李斌笑付业龙赖佑政金传信王依利陈燕琴
Owner ZHEJIANG ZOMAX GARDEN MACHINERY