valve spring retainers for intake and exhaust valves for automotive engines

摘要

The present invention is, preventing a decrease in the engine efficiency through weight reduction of the material, while the improvement of durability and strength as discloses a valve spring retainer for intake and exhaust valves of an automobile engine having excellent shock absorbing performance. ; the configuration of the present invention, the center of which there is a valve stem end is mounted houl is formed, the one side end outer peripheral surface In the valve spring retainer for intake and exhaust valves of an automobile engine, which is formed in an outer diameter direction so that the flange is seated valve spring, the base material of the valve spring retainer is made of durum uranium, the mounting holes of the stem end portion in contact with the valve The titanium layer is formed on the inner circumferential surface of the spring retainer, and a titanium layer between the dew uranium material portion has a first shock absorbing layer made of high-strength synthetic resin is formed, the second shock absorbing layer made of a high elasticity O- ring has an outer circumferential surface of the flange is formed on the outer peripheral surface of the retainer and the valve spring is characterized in that the valve spring seating portion, the third shock absorbing layer made of a high-strength synthetic resin is formed.