Engine and piston

A piston and piston skirt technology is applied in the field of engines to achieve the effect of reducing PN emissions and reducing oil consumption

Pending Publication Date: 2021-03-09
ANHUI HUALING AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still cannot effectively solve the problem that a large amount of engine oil enters the combustion chamber to participate in the combustion during the idling period of the engine.

Method used

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  • Engine and piston
  • Engine and piston
  • Engine and piston

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0023] The main reason for the engine to burn oil is that when the piston is going down, the oil scraped off by the oil ring is mainly stored under the oil ring and in the window 4 of the piston surface. Due to the structural design of the window 4 of the piston, a large amount of oil is accumulated here, and only when the piston runs It will be partially released when it reaches the bottom, and a large amount of engine oil has been pumped and accumulated under...

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Abstract

The invention discloses an engine and a piston. The piston comprises a piston top, a piston head and a piston skirt; the piston head is provided with a gas ring groove and an oil ring groove; the piston skirt is provided with a piston surface window which is concave inwards relative to the outer cylindrical surface of the piston skirt; an oil storage groove is formed in the lower portion, away from the gas ring groove, of the oil ring groove, and the oil storage groove communicates with the piston surface window; the piston surface window extends to be flush with the tail end of the piston skirt; and the tail end of the piston surface window and the tail end of the piston skirt are provided with oil discharging openings integrally communicating with the piston surface window. According tothe piston, the oil discharging capacity is improved, engine oil scraped off from the wall of a cylinder by an oil ring can be released to an oil pan through the piston surface window, so that the situation that the engine oil below the oil ring is sucked into a combustion chamber when the engine runs at an idle speed is remarkably reduced, and the engine oil consumption and PN emission of the engine are reduced.

Description

technical field [0001] The invention relates to the field of engines, in particular to a piston. The invention also relates to an engine with such a piston. Background technique [0002] In recent years, due to the advantages of natural gas engines in energy saving, emission reduction and air pollution prevention and control, natural gas engines in my country have been rapidly developed and widely used. [0003] With the upgrading of national emission regulations from National V to National VI, in order to meet the national VI emission standards stipulated in GB17691-2018, combined with EGR (exhaust gas recirculation) technology, the natural gas engine has changed from the original lean combustion technology route to the equivalent combustion technology route , basically as long as the fuel system of the original diesel engine is replaced with a natural gas system, and then the piston is processed into a common compression ratio. After these two major improvements, a diesel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00F01M9/00
CPCF01M9/00F02F3/0015
Inventor 魏顺冬费运嘉于洋吕林庞进军冯峰张典付艳丽孙芳芳张泷堂杨明亮张猛
Owner ANHUI HUALING AUTOMOBILE
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