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Light piston, engine and automobile

A lightweight, piston technology, applied in the direction of engine components, machines/engines, pistons, etc., can solve the problems that cannot meet the lightweight design requirements of pistons, and the weight of pistons is large, so as to reduce friction loss and reduce piston weight.

Inactive Publication Date: 2020-06-09
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology will make the weight of the piston more and more heavy, which can no longer meet the lightweight design requirements of modern gasoline engine pistons

Method used

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  • Light piston, engine and automobile
  • Light piston, engine and automobile
  • Light piston, engine and automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment one, see Figure 4 , Figure 5 with Figure 7 , the lightweight piston shown includes a piston head 1, a main thrust side skirt 2 and an auxiliary thrust side skirt 3, and the main and auxiliary thrust side skirts are connected by piston surface windows 4 on both sides. A pin seat 5 is arranged on the piston surface window portion 4, and the piston surface window portions 4 on both sides are arranged symmetrically along the front-rear direction, and the piston surface window portion 4 on one side includes a main thrust side window wall 41 connected with the main thrust side skirt portion 2 And the auxiliary thrust side window wall 42 connected with the auxiliary thrust side skirt 3, the main thrust side window wall 41 is a straight plane with equal wall thickness, and the main thrust side window wall thickness a 1 is 3.2mm, the angle α between the plane where the main thrust side window wall is located and the vertical direction 2 is 30°; the auxiliary thr...

Embodiment 2

[0041] Embodiment 2, a lightweight piston, its structure is the same as that of Embodiment 1, and its size parameters are:

[0042] Angle α between the lower part of the inner surface of the pin seat and the vertical plane 1 is 15°; the angle α between the plane where the main and auxiliary thrust side window walls are located and the vertical direction 2 is 30°; the angle α between the inner surface of the piston head and the outer surface of the window wall 3 is 3°.

[0043] Transverse radius R of main and auxiliary thrust side window walls 1 90mm, transition arc radius R 2 is 13mm, the radius R of the inner surface of the skirt on the main thrust side 3 is 18mm, the radius R of the inner surface of the skirt on the auxiliary thrust side 4 is 16mm, the radius of curvature R of the upper curved surface on the inner surface of the pin seat 5 52mm, pit rounding radius R 6 is 3mm, the longitudinal radius R of the main and auxiliary thrust side window wall stiffeners 7 40...

Embodiment 3

[0045] Embodiment 3, a lightweight piston, its structure is the same as that of Embodiment 1, and its size parameters are:

[0046] Angle α between the lower part of the inner surface of the pin seat and the vertical plane 1 is 13°; the angle α between the plane where the main and auxiliary thrust side window walls are located and the vertical direction 2 is 25°; the angle α between the inner surface of the piston head and the outer surface of the window wall 3 is 5°.

[0047] Transverse radius R of main and auxiliary thrust side window walls 1 is 100mm, the transition arc radius R 2 is 15mm, the radius R of the inner surface of the skirt on the main thrust side 3 is 16mm, the radius R of the inner surface of the skirt on the auxiliary thrust side 4 is 14mm, the radius of curvature R of the upper curved surface on the inner surface of the pin seat 5 55mm, pit rounding radius R 6 is 2mm, the longitudinal radius R of the main and auxiliary thrust side window wall stiffene...

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Abstract

The invention discloses a light piston. The light piston comprises a piston head, a main thrust side skirt part and an auxiliary thrust side skirt part, wherein the main thrust side skirt part and theauxiliary thrust side skirt part are connected through piston surface window parts on the two sides. Pin bosses are arranged on the piston surface window parts. A plurality of weight reduction pits are formed between the upper ends of the piston surface window parts and the piston head. The longitudinal section of the inner side of each pin boss is in the shape of a descending wedge, and the horizontal section of the upper portion of the inner side of each pin boss is in the shape of double curves with opposite openings. The main thrust side skirt part and the auxiliary thrust side skirt partare of an asymmetrical structure. The weight of the piston can be reduced on the premise that sufficient strength of the piston is guaranteed. The invention further discloses an engine with the lightpiston, and an automobile.

Description

technical field [0001] The invention relates to gasoline engine pistons, in particular to a lightweight piston, an engine and an automobile. Background technique [0002] With the continuous improvement of engine power, economy and NVH requirements, the engine explosion pressure is increasing, and the weight requirement is getting lighter and lighter. The piston is a moving part inside the engine, and its weight reduction helps to reduce the reciprocating inertial force and engine vibration, while improving its power and economy. [0003] see figure 1 with figure 2 , in order to ensure sufficient structural strength of the traditional gasoline engine piston, a larger wall thickness is designed in the main force-bearing parts such as the existing pin seat 10, the existing face window 11, and the existing skirt 12, resulting in a relatively large weight of the piston; see also image 3 , the face window wall of the existing face window 11 is linear, and the widths of the m...

Claims

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Application Information

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IPC IPC(8): F02F3/00
CPCF02F3/00
Inventor 盛国辉李久林林翰王亚鹏易彬
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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