A kind of piston and its production process

Abstract

The invention discloses a piston, which comprises a piston body and a graphite layer covered on the skirt surface of the piston body. The invention also discloses a manufacturing process of the piston, comprising the steps of: printing graphite on the surface of the skirt of the piston body. The piston provided by the present invention, on the basis of the existing piston, is provided with a graphite layer on its skirt, which can play the role of a high-temperature isolation layer, will not cause the cylinder and the piston to bond, and can improve the reliability of the engine, because Graphite powder itself is soft and has lubricity, so when the engine is starting, or when lubrication is difficult due to other accidents, the graphite layer on the surface of the piston skirt can lubricate in a short time, making the piston Get through the emergency safely.

Description

technical field [0001] The invention relates to the technical field of pistons, in particular to a piston and a production process thereof. Background technique [0002] The piston is the "heart" of the automobile engine, which bears alternating mechanical loads and thermal loads, and is one of the key components in the engine with the worst working conditions. The function of the piston is to withstand the gas pressure and transmit it to the connecting rod through the piston pin to drive the crankshaft to rotate. The top of the piston is also an integral part of the combustion chamber. Generally, pistons are cylindrical. According to the working conditions and requirements of different engines, the structure of the piston itself is various. Generally, the piston is divided into three parts: the head, the skirt and the piston pin seat. [0003] With the development of lightweight engines, many parts of the engine are currently made of aluminum alloy, and the engine block is...

AI Technical Summary

Problems solved by technology

The friction pair of piston, piston ring and cylinder wall loses sealing performance, which leads to the decrease of cylinder compression pressure and loss of power; the downward movement of combustible mixture increases the pressure of crankcase, and in severe cases, it will cause crankcase explosion; the lubricant oil escapes to the cylinder Burning engine oil; serious smoke from the exhaust pipe; abnormal engine noise; the engine cannot work normally or even stalled

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