Lightweight low friction piston

Abstract

The invention discloses a lightweight low-friction piston. The piston comprises a piston ring belt, a piston skirt part and a piston pin seat, wherein the piston ring belt comprises a piston head part; an arc-shaped plate of a main thrust face of the piston skirt part is wide, and an arc-shaped plate of a secondary thrust face is narrow, the face wall windows of the main thrust face and the secondary thrust face are connected with the bottom of the piston pin seat to form a diamond shape with two ends being arc-shaped plates, and the thickness of the face wall window of the secondary thrust face is smaller than the thickness of the face wall window of the main thrust face; two symmetric axial arc-shaped grooves are formed in the bottom ring face of the piston ring belt, and the arcs of thetop walls of the axial arc-shaped grooves and the arc of the top wall of the pin hole of the piston pin seat are located on the same horizontal projection line; and the lower parts of the two inner walls of the face wall windows of the main thrust face and the secondary thrust face are inclined from inside to outside in an arc surface. According to the piston, the main thrust face is optimally designed, the secondary thrust face is optimally designed as well, under the premise that the strength of the piston is guaranteed, the friction area is greatly reduced, so that the friction loss is greatly optimized and improved; and meanwhile, the piston quality is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of internal combustion engine pistons, in particular to a lightweight and low-friction piston. Background technique [0002] Traditional internal combustion engines are faced with severe problems of fuel consumption and emissions, especially as the country’s regulations on fuel consumption become stricter, it is difficult for traditional internal combustion engines to meet the requirements of strict national fuel consumption regulations. Objectively, higher requirements are put forward for the optimization and upgrading of traditional internal combustion engines. Reducing friction loss is the most cost-effective method among all methods of reducing fuel consumption, and it is also the most effective way to save energy and reduce emissions. The part of the internal combustion engine that accounts for the largest friction loss is the motion system. The piston system consumes the most friction loss in the motio...

AI Technical Summary

Problems solved by technology

If a technician proposes an asymmetrical design for the main thrust surface and the secondary thrust surface of the piston skirt, but some main thrust surfaces are narrow and the secondary thrust surface is wide, this may have a negative impact on the strength of the piston; The surface is wide and the secondary thrust surface is narrow, but only one of the thrust surfaces is improved instead of optimizing the design at the same time. For example, the two side walls formed by the connection between the main thrust surface and secondary thrust surface and the bottom of the piston pin seat are roughly The walls are straight and roughly parallel, and the technical effect of reducing the friction area while reducing the mass of the piston under the premise of ensuring the strength of the piston is not very ideal

Also have, the light weight piston of prior art, its compression height namely the pin hole center of pin hole seat to the distance of piston top surface is still too large

In short, the lightweight pistons of the prior art still have relatively large friction area and large piston mass on the basis of ensuring the strength of the piston, and have not yet achieved low friction.

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