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Water-cooled dual-fuel engine exhaust valve stand

A dual-fuel engine, water-cooled technology, used in engine components, machines/engines, mechanical equipment, etc., can solve problems such as depression on the surface of the exhaust valve seat, reduction in engine power, and reduction in the sealing performance of the valve and valve seat. Good performance, prolong service life, and solve the effect of split cracking

Inactive Publication Date: 2007-10-03
力帆科技(集团)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the exhaust valve seat in the water-cooled engine cylinder head of dual-fuel three-wheel and four-wheel motorcycles is generally a single-layer structure composed of iron-based powder layers containing carbon, chromium, copper, etc., because the exhaust valve seat is in the engine cylinder head. In China, the user has used dual fuel for a long time, and the working temperature of the exhaust valve seat is usually above 1200°C, and it is subjected to high-frequency impact and wear. Reduced sealing performance with the valve seat, resulting in reduced engine power
In order to improve the heat resistance and wear resistance of the exhaust valve seat, someone thought of spraying alloy powder on the exhaust valve seat, but there was a new problem of cracking during use, and the service life was still not improved. Complicated and expensive to manufacture, so not popularized

Method used

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Experimental program
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Effect test

Embodiment 1

[0015] Get 0.8 kilograms of carbon, 0.8 kilograms of chromium, 2.5 kilograms of copper and 95.9 kilograms of iron that are all powdery and put them together as the processing raw materials for the bottom layer 2; 9.5 kilograms of copper, 2.2 kilograms of nickel, 7.2 kilograms of cobalt and 70.8 kilograms of iron are put together as the processing raw material of sealing surface layer 1 for subsequent use, and make water-cooled dual-fuel engine exhaust valve seat of the present invention according to the following process steps:

[0016] a. Put the raw materials (powder) of the sealing surface layer 1 and bottom layer 2 prepared above into two mixers and stir them evenly;

[0017] b. Put the powdery mixture of the bottom layer 2 after stirring into the forming mold quantitatively and press to form;

[0018] c. Quantitatively place the powdered mixture of the stirred sealing surface layer 1 on the bottom layer 2 that has been pressed and formed in the forming mold, and press and...

Embodiment 2

[0026] Get 1.4 kilograms of carbon, 1.8 kilograms of chromium, 3.5 kilograms of copper and 93.3 kilograms of iron that are all powdery and put them together as the raw materials for processing the bottom 2; 10.0 kilograms of copper, 2.8 kilograms of nickel, 8.0 kilograms of cobalt and 66.9 kilograms of iron are put together as the processing raw material of sealing surface layer 1 standby, and make water-cooled dual-fuel engine exhaust valve seat of the present invention according to the following process steps:

[0027] a. Put the raw materials (powder) of the sealing surface layer 1 and bottom layer 2 prepared above into two mixers and stir them evenly;

[0028] b. Put the powdery mixture of the bottom layer 2 after stirring into the forming mold quantitatively and press to form;

[0029] c. Quantitatively place the powdered mixture of the stirred sealing surface layer 1 on the bottom layer 2 that has been pressed and formed in the forming mold, and press and form it again; ...

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Abstract

A exhaust value seat of water cooling double-fuel engine which body is ring cylinder.It is cone hole which is composed with two layers fe-based metal powder level that is spissatus seal coat(1) and bottom layer(2) in one end of ring cylinder inner hole.The composition and quality percentage of bottom layer is:carbon 0.7~1.4,chromium 0.3~2.0,copper 2.0~4.0,the allowance is iron totally;the composition and quality percentage of spissatus seal coat layer is:carbon0.7~1.4,chromium 4.0~6.0,mo 4.0~6.5,copper 6.0~10.0,nickel 2.0~3.0,cobalt 5.0~8.5,the allowance is iron totally.Compared with the traditional monolayer exhaust gate,the heat resistance and wear resistance of this exhaust gate have been improved,the problem of exhaust gate body cracking has also been resovled,thus prolonging the service life of the exhaust gate.

Description

technical field [0001] The invention relates to a motorcycle engine accessory, in particular to an exhaust valve seat of a water-cooled dual-fuel engine. Background technique [0002] At present, the exhaust valve seat in the water-cooled engine cylinder head of dual-fuel three-wheel and four-wheel motorcycles is generally a single-layer structure composed of iron-based powder layers containing carbon, chromium, copper, etc., because the exhaust valve seat is in the engine cylinder head. In China, the user has used dual fuel for a long time, and the working temperature of the exhaust valve seat is usually above 1200°C, and it is subjected to high-frequency impact and wear. The sealing performance between the valve seat and the valve seat is reduced, which in turn causes the engine power to drop. In order to improve the heat resistance and wear resistance of the exhaust valve seat, someone thought of spraying alloy powder on the exhaust valve seat, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L3/02
Inventor 尹明善吴丹
Owner 力帆科技(集团)股份有限公司