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Piston

A piston and piston ring groove technology, which is applied in the direction of pistons, engine components, machines/engines, etc., can solve the problems of shortening the service life of pistons and cylinder liners, and preventing metal wear debris from washing away, so as to prevent cylinder scuffing and reduce friction work Loss, the effect of reducing fuel consumption

Inactive Publication Date: 2010-09-29
浙江博瑞车业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The piston with this structure has an oil hole in the skirt, which can only lubricate and cool the part, and cannot wash away the metal debris. It will also rub against each other during mutual movement, scratch the cylinder, and shorten the piston and shorten the piston. The service life of the cylinder liner

Method used

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Embodiment Construction

[0013] Referring to the accompanying drawings, this piston has a body 1 with a piston ring groove 2 and a skirt 3, the inside of the body 1 is an oil return hole 5, and the outer surface of the skirt 3 is provided with a labyrinth. The groove 4 makes the outer circular surface of the skirt 3 form a plurality of curved surfaces; in this embodiment, the labyrinth-like groove 4 divides the outer circular surface of the skirt 3 into fields; the cross section of the groove 4 is arc-shaped After the cross-section of the groove 3 is made into an arc shape, the lubricating oil can flow more quickly, and an oil film can be formed between the piston and the cylinder liner during the mutual movement. The depth of the groove is preferably between 0.3-0.5 mm, and the width is preferably between 2-2.5 mm. The outer circular surface of the skirt is divided into fields, that is, multiple curved surfaces. The area of ​​each curved surface is not less than 225 mm. There must be no sharp co...

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PUM

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Abstract

The invention discloses a piston, comprising a main body (1). The main body (1) is provided with a piston ring slot (2) and a skirt section (3), and oil return holes (5) are arranged in the main body (1). The piston is characterized in that the excircle surface of the skirt section (3) is provided with a labyrinth-shaped groove (4) so that the excircle surface of the skirt section (3) forms a plurality of curved surfaces. After the labyrinth-shaped slot is arranged on the excircle surface of the skirt section, when the piston and a cylinder sleeve rub mutually in the movement, a thicker layer of oil film is formed between base kinematic pairs so as to reduce the friction contact surface. The large-area mutual contact of slight convex bodies on metal surfaces can be avoided, and the functions of abrasion resistance and cylinder scraping prevention can be achieved in the maximum degree.

Description

Technical field [0001] The invention involves a kind of energy -saving internal combustion engine piston, especially pistons that can resist abrasion and pull cylinder. Background technique [0002] The piston is the most important sports piece on the internal combustion engine. It is called the "heart" of the internal combustion engine. The mechanical load and thermal load that is affected by the transformation is one of the key components with the worst working conditions in the engine. [0003] At present, pistons are composed of piston, connecting rods, piston sales, bands, cylinders, etc. inside the engine.The piston has a high -speed circulation in the engine, and the piston surface is in contact with each other on the surface of the cylinder. Local friction is generated between the cylinder set and the piston friction ring.As a result, the micro -convex body on the metal surface is in contact with each other.Under the action of high load, micro -convex deformation, in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00
Inventor 邱晓东
Owner 浙江博瑞车业有限公司
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