Piston for use in engine cylinder and piston engine

A piston engine and engine cylinder technology, applied to engine components, machines/engines, pistons, etc., can solve the problems of reducing engine power and thermal efficiency, excessive exhaust pollutant emissions, and insufficient fuel combustion, etc., to improve power and thermal efficiency , reasonable spatial distribution and high combustion efficiency

Inactive Publication Date: 2018-09-04
SHANGHAI CHANGXIN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent document CN101761415A discloses a notched diesel piston and a compression ignition engine. After the fuel is injected into the notch, due to the unreasonable spatial distribution of the fuel beam and the short distance to the piston wall, it is not conducive to the mixing of fuel and air. Insufficient fuel combustion, more exhaust pollutants; and prone to knocking
If these defects are not desired, the engine compression ratio can only be reduced accordingly, which will reduce the power and thermal efficiency of the engine

Method used

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  • Piston for use in engine cylinder and piston engine
  • Piston for use in engine cylinder and piston engine
  • Piston for use in engine cylinder and piston engine

Examples

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Embodiment Construction

[0017] The present invention will now be described in further detail in conjunction with the accompanying drawings and embodiments.

[0018] see Figure 1 ~ Figure 3 , which is a piston engine of the present invention, comprising a cylinder and a fuel injector 4, the combustion chamber of the cylinder is surrounded by a cylinder wall 2, a cylinder head 1 and a piston 3 that is sleeved on the cylinder wall, and the fuel injector 4 is located in the cylinder The middle part of the cover 1 is facing the outlet of the notch on the top of the piston 3. The cylinder head is provided with an air inlet 11, an inlet valve 111, an exhaust port 12, and an exhaust valve 121. The oil beam ejected from the injector is Cone angle 5 is formed. The top surface of the piston 3 is inwardly recessed into a notch 30, which is a truncated cone. On its cross-sectional view, it can be seen that the notch is a symmetrical trapezoid, and the bottom edge of this trapezoid and the included angle 6( Fi...

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PUM

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Abstract

A piston (3) for use in an engine cylinder and a piston engine which is provided with said piston (3), the piston (3) comprising: a recess (30) which is formed from a top surface to an inner concavity, the overall space of the recess (30) being a truncated cone shape, wherein the ratio of the upper bottom diameter of the truncated cone to the outer diameter of the piston is 0.25-0.55, and the ratio of the lower bottom diameter of the truncated cone to the outer diameter of the piston is >=0.4. The engine no longer requires a special ignition device, while fuel is combusted more completely, andcombustion efficiency is higher; moreover, the size of an outlet of the recess (30) inhibits the production of knocking, which may correspondingly increase the power and thermal efficiency of the engine.

Description

technical field [0001] The present invention relates to a piston engine, and more particularly to a piston for use in a cylinder of the engine, which has a recess at the top. Background technique [0002] Traditional spark-ignition engines such as gasoline engines and kerosene engines require a special electric spark to ignite the mixture, and there are phenomena such as knocking during combustion, and their compression ratio is small (8-12), resulting in low thermal efficiency and can no longer adapt to thermal efficiency. higher and higher requirements. [0003] The compression ignition engine is an internal combustion engine that does not rely on electric sparks to ignite, but relies on the high temperature and high pressure in the cylinder at the end of compression to cause the mixture to spontaneously ignite. The patent document CN101761415A discloses a notched diesel piston and a compression ignition engine. After the fuel is injected into the notch, due to the unreas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/26
CPCF02F3/26
Inventor 程明军
Owner SHANGHAI CHANGXIN IND
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