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Diesel engine piston structure

A diesel engine and piston technology, which is applied in the field of diesel engine piston structure, can solve the problems of broken piston, easy cracking, and the engine cannot work normally, and achieves the effect of single material, reduced process requirements and cost.

Active Publication Date: 2019-12-06
GUANGXI YUCHAI MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a diesel engine piston structure, so as to overcome the prior art. With the continuous improvement of the performance requirements of diesel engines, the pin holes are prone to cracking under the action of high temperature and high pressure gas, resulting in broken pistons and engine failure. disadvantages of work

Method used

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Embodiment Construction

[0018] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0019] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0020] Such as Figure 1 to Figure 2 As shown, a diesel engine piston structure according to a specific embodiment of the present invention includes a piston body 1 , and the piston body 1 includes a combustion chamber 7 , a piston inner chamber 5 , a shifting portion 6 and a pin hole 8 . The combustion chamber 7 is located at the top of the piston body 1, the position of the combustion chamber 7 is near the center of the ...

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Abstract

The invention discloses a diesel engine piston structure. The diesel engine piston structure comprises a piston body, and the piston body comprises a combustion chamber, a piston inner cavity, a splitpart and pin holes; the combustion chamber is located at the top of the piston body, the piston inner cavity is located below the combustion chamber and is located inside the piston body, and the piston inner cavity is of a conical dome structure; the split part is located in the middle lower part of the piston inner cavity and is of a wedge structure, and two wedge-shaped surfaces of the wedge structure are in transition connection with a certain angle formed between an inclined plane and the central axis direction of the piston body; and the pin holes are distributed in the two sides of thepiston inner cavity. The diesel engine piston structure has the advantages that the highest detonation pressure in a cylinder is improved under the condition that the reliability is guaranteed so that an engine can reach a higher performance requirement and the structure of a piston can be compact, the material is single, and the technological requirement and the cost can be reduced.

Description

technical field [0001] The invention relates to the field of engine manufacturing, in particular to a diesel engine piston structure. Background technique [0002] National laws and regulations on diesel engine exhaust emission requirements continue to increase, which also continuously increases the requirements on the piston of the combustion system. This requires the piston to reasonably organize the airflow in the cylinder according to the characteristics of the diesel engine's operating conditions under the premise of ensuring reliability and durability, so that the fuel vapor formed by the atomization and evaporation of the fuel is distributed reasonably on the top of the piston, so as to fully utilize the fuel. and air, reduce unburned products in the cylinder, and improve the economy of the diesel engine. [0003] The Ministry of Environmental Protection of my country has issued the National VI limit value standard for vehicle diesel engine exhaust pollutants. In or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/26F02F3/00F02B23/06
CPCF02B23/0672F02F3/00F02F3/26Y02T10/12
Inventor 张锦希红飞苏怀林
Owner GUANGXI YUCHAI MASCH CO LTD
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