| 摘要 |
PURPOSE: A hollow valve spring is provided to improve elastic force of the spring by forming the valve spring with winding a metal wire spirally, and to adjust the elastic force by varying the diameter of the metal wire. CONSTITUTION: A valve spring(1) is formed by winding a tubular metal wire(2) spirally. Inertia moment is increased, and the elastic force of the valve spring to the same weight is improved by forming the hollow metal wire. The elastic force of the valve spring is adjusted by varying the diameter of the metal wire. The elastic force is different according to the height by reducing the diameter of the metal wire gradually. Natural frequency is increased by improving the strength of the spring. Noise and vibration are reduced by adjusting the mass of the spring.
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