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Piston with unsmooth top

A non-smooth, piston technology, applied in the direction of pistons, engine components, machines/engines, etc., can solve the problems of turbulent flow intensity and turbulent kinetic energy, undisclosed, and reduce the friction between the mixed gas flow and the top of the piston, etc. , to increase flame propagation rate and combustion efficiency, increase turbulent flow intensity and turbulent kinetic energy, and improve dynamic performance

Active Publication Date: 2013-03-06
SAIC GENERAL MOTORS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the prior art does not reveal what size range and arrangement of multiple protrusions will be more conducive to reducing the friction between the mixed gas flow and the top of the piston, and at the same time guide the mixed gas flow to flow reasonably, accelerate the tumble flow rupture in the engine cylinder, increase the Turbulence intensity and turbulent kinetic energy, increase flame propagation rate and combustion efficiency, thereby improving engine power, economy and emission characteristics

Method used

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  • Piston with unsmooth top
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Embodiment Construction

[0028] Figure 1-6 and the following description describe alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. In order to teach the technical solutions of the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art should understand that modifications or substitutions from these embodiments will fall within the protection scope of the present invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. As such, the invention is not limited to the alternative embodiments described below, but only by the claims and their equivalents.

[0029] Such as Figure 1-6 As shown, an engine piston includes a piston base 1 and a piston top 2, 20, 30, 40, 50, 60, wherein the piston top is non-smooth. Such as figure 1 As shown, the piston crown 2 includes a piston crown base ...

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Abstract

The invention discloses a piston with an unsmooth top. The piston comprises a piston matrix and the piston top, the piston top comprises a piston top base plane and a plurality of regularly arrayed piston top projections or pits, and the piston top projections or pits project outwards or recess inwards respectively. The piston has the advantages of simple structure and low manufacturing cost. When the piston and an engine cylinder are combined to form a combustion chamber, airflow can be distributed reasonably, tumble and break in a piston cylinder are accelerated, and turbulence intensity and turbulent kinetic energy are increased, so that gas mixture is combusted sufficiently in the engine cylinder, and further, combustion efficiency is improved, pollutant discharge is reduced, and fuel utilization rate is increased.

Description

【Technical field】 [0001] The present invention relates to pistons, and more particularly to pistons with non-smooth tops for use in engines. 【Background technique】 [0002] The piston is an important part of the engine. It is located in the piston cylinder. A combustion chamber is formed between the top of the piston and the cylinder head of the piston cylinder. The explosive force generated by the rapid expansion of the fuel is used to drive the piston to run, and the linear reciprocating motion of the piston is driven by the connecting rod crank. It is converted into the rotational motion of the output shaft to realize the conversion between internal energy and mechanical energy. For the engine, the air flow condition in the piston cylinder affects the formation and combustion process of the mixed gas, which is directly related to the power, economy and emission characteristics of the engine. Well-organized air movement in the piston cylinder, for gasoline engines, can in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00
Inventor 张国耕曹波裴梅香金雪
Owner SAIC GENERAL MOTORS
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