Heat insulating piston

A piston and matrix technology, applied in the field of heat insulation pistons, can solve the problems of high heat loss of internal combustion engines, poor heat insulation effect of pistons, etc., and achieve the effect of reducing heat loss

Inactive Publication Date: 2016-12-07
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem of high heat los

Method used

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  • Heat insulating piston

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Embodiment Construction

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] like figure 1 As shown, a heat-insulating piston provided by the embodiment of the present invention includes a piston base 1, and the top of the piston base 1 is provided with a groove 3 for forming a combustion chamber. In this embodiment, the groove 3 is preferably "ω" type, A metal foam layer 4 is provided on the top surface 2 of ...

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Abstract

The invention relates to the technical field of internal combustion engines, in particular to a heat insulating piston. The heat insulating piston comprises a piston substrate. A groove used for forming a combustion chamber is formed in the top of the piston substrate. A foam metal layer is arranged on the top face of the piston substrate and the surface of the groove. According to the heat insulating piston provided by the invention, the foam metal layer is arranged on the top face of the piston substrate and the surface of the groove used for forming the combustion chamber correspondingly; on the one hand, the specific heat capacity of the foam metal layer is low, and heat stored by the foam metal layer during working of the piston is small, so that the heat absorbed from the combustion chamber is small; and on the other hand, the heat conduction coefficient of the foam metal layer is low, so that the speed of heat transfer from the combustion chamber to the piston substrate is low, and the heat loss of the combustion chamber is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a heat insulating piston. Background technique [0002] With the upgrading of engine emission regulations, the temperature and pressure requirements of the combustion chamber of the engine piston are getting higher and higher, especially for gas engines fueled by natural gas and liquefied gas, the heat load of the piston is higher. The high specific heat capacity and high thermal conductivity of the piston cause significant convective heat transfer at the top of the combustion chamber and at the combustion chamber, resulting in high heat loss and low effective output power of the combustion chamber. [0003] There are several techniques for modifying the thermal conductivity of pistons. Change the material of the piston as a whole or design the heat insulation layer material on the surface of the piston, etc. For example, the integral ceramic piston is used,...

Claims

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Application Information

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IPC IPC(8): F02F3/12F02F3/14F02F3/26C23C6/00C23C4/134C23C4/10C23C28/00
CPCF02F3/12C23C4/10C23C6/00C23C28/321C23C28/34F02F3/14F02F3/26F02F2200/06
Inventor 李勤李明李继超冯月雪陈秀明
Owner WEICHAI POWER CO LTD
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