engine valve

Abstract

The invention provides a novel engine valve. The novel engine valve comprises the following components in percentage by weight: 40%-45% of graphite fibers of which the content of carbon is above 97%, 50%-55% of engineering plastic or resin, 2.8%-3.2% of rare earth and 1.8%-2.2% of a curing agent. The preparation method comprises the following steps of placing the engineering plastic or resin, the curing agent and rare earth into a stirring container, blowing the chopped graphite fibers into the stirring container filled with engineering plastic or resin, the curing agent and rare earth by virtue of a blower and uniformly stirring, after the materials are uniformly stirred, pouring the uniformly stirred materials into a die, carrying out injection molding, calcining, graphitizing, turning off a power supply, cooling to room temperature, taking out the molded part and then carrying out finish machining and heat treatment to obtain the engine valve. Since the valve provided by the invention has small thermal-expansion and cold-contraction coefficient, the valve clearance cannot be changed and thus the service life of the composite material valve is prolonged.

Description

technical field [0001] The invention relates to the application field of composite materials, in particular to a novel engine valve. Background technique [0002] The world is in the era of green energy vehicles, and motor vehicle engineers and technicians from all over the world put the issue of lightweight vehicles at the top of the list. The second is durability, less fuel, heavy load, fast driving, safety, reliability, and comfort. And they are all looking for alternative fuel electric energy vehicles to protect the common home of mankind on the earth. In today's world, many developed countries have gone through and are experiencing the painful suffering of air pollution and smog. Electric cars are another long time away. Humans realize that motor vehicle fuel is one of the sources of smog. To use the lowest fuel consumption and power consumption for motor vehicles, it is first necessary to reduce the weight of the vehicle itself. The weight of each vehicle is reduced ...

AI Technical Summary

Problems solved by technology

[0003] Existing automobile engine valves are mostly made of metal or alloy materials, which are easy to expand when the temperature is high, and the valves are severely worn after a period of use, and the service life is short. How to create a durable valve with a small coefficient of thermal expansion and contraction, The new engine valve with long service life, high temperature resistance and friction resistance can make the car lighter, and finally realize the industrialization of green new energy vehicles, which has become the goal that the industry urgently needs to improve