Gas inlet valve and gas outlet valve of engine and process for manufacturing same

Abstract

Aiming at solving the problem of the failure of the product for the volume of the head part is too big, the weight is too heavy, the temperatures of the disk part and the second hot point are too high because the heat capacity is a little higher when an engine operates, the diameter of the second hot point is too small, the mechanical strength of the second hot point is poor, the heat transfer distance between the head part and the rod part is too far, the cooling of the second hot point is poor, the strength of the neck part is poor and the like existing in the present B series engine valve. The invention provides a gas inlet valve and a gas outlet valve of the engine and a process for manufacturing the same. The process has the advantages of improving the structure of the gas valve, optimizing the machine procedure, reducing the processing stress and improving the processing precision.

Description

technical field [0001] The invention relates to an intake valve and an exhaust valve of an engine and a production process for both. Background technique [0002] The valve is an actuator in the engine valve train. Due to its special function and harsh working environment, the valve failure occurs from time to time, ranging from power loss to machine scrapping or even vicious accidents. B series engines are widely used in military and civilian vehicles due to their compact structure, powerful horsepower and high cost performance. [0003] When the B series engine is working, the exhaust valve head is subjected to a maximum temperature of over 950°C, and the maximum temperature of the second hot spot on the neck is also around 850°C, and it is subjected to a large impact alternating load. The working environment of the engine is harsh, the working conditions often exceed the design standards, and failure accidents such as valve breakage and U-turn occur from time to time. Ac...

AI Technical Summary

Problems solved by technology

[0011] The main performance is that the head is too large and heavy, and the heat capacity is too high during work, which leads to overheating of the second hot spot; the diameter of the second hot spot is too small, and the mechanical strength is not enough; the heat transfer distance from the head to the rod is too long, and the second hot spot Insufficient cooling at the second hot spot; insufficient neck strength are the main reasons for product failure

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