SEAT RING FOR INTAKE VALVE AND GAS ENGINE

Japanese Patent JP3715437

B2

PROBLEM TO BE SOLVED: To provide a seat ring for intake valve capable of setting a sufficient value of swirl ratio and coefficient of flow at the same time.
SOLUTION: A seat ring 1 is not formed into the concentric circle, and the center of the outer diameter and the center of the inner diameter of a hole part 2 diviate from each other. The inner peripheral surface of the hole part 2 is formed of a peripheral surface at an inner diameter &phiv B having the center (b) displaced from the center (a) of the outer diameter by E. Direction from the center (a) of the outer diameter to the center (b) of the inner diameter is named eccentric direction. The peripheral surface having the center (a) and the inner diameter &phiv A is firstly formed, and thereafter, the peripheral surface having the center (b) and the inner diameter &phiv B is worked. A rear peripheral surface in the eccentric direction is formed into a projecting peripheral surface 2a as a peripheral surface having the inner diameter &phiv A, and a front part in the eccentric direction is formed into a flat peripheral surface 2b. The seat ring 1 is fitted so that the eccentric direction thereof is nearly opposite to the intake direction of the air supplied from an intake port to a combustion chamber. With this structure, sufficient values of swirl ratio and coefficient of flow can be obtained at the same time.

Satoru Goto
Nishi Eibun

JP19589698A

November 09, 2005

July 10, 1998

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Niigata Motor Co., Ltd.

F01L3/22; F02B43/02; (IPC1-7): F01L3/22; F02B43/02

JP5075453U
JP61093213A
JP59131910U

Norimitsu Nishimura

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