Exhaust gas flow control valve apparatus for use in an internal combustion engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorsAkio Kuramoto, Toshinari Onishi
Life of this patent
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Abstract
An exhaust gas flow control valve apparatus comprising a rotary valve shaft extending across the exhaust passage in the exhaust housing. The shaft has an end portion projecting from the exhaust housing. A bimetallic element is mounted on the end portion of the shaft. A hollow collar is sealingly fitted onto the end portion of the shaft. A compression spring is arranged at one end of the shaft, so as to urge the hollow collar against the wall of the exhaust housing, for preventing leakage of the exhaust gas.
Claims13
An exhaust gas flow control valve device in combination with an internal combustion engine having an exhaust housing defining an exhaust passage therein, said device including a rotary shaft extending across the exhaust passage and rotatably inserted into holes formed in opposing walls of the exhaust housing, said rotary shaft having an end portion projecting from one of said opposing walls of the exhaust housing;
- a valve mounted on said shaft in the exhaust passage for controlling the flow of exhaust gas;
- and means for rotating said shaft in accordance with change in operating condition of the engine, wherein the improvement comprises:
- sealing means sealingly surrounding sahd shaft at a position near the projecting end portion of said shaft adjacent said one wall of the exhaust housing and
- resilient means for urging said sealing means against the adjacent wall of the exhaust housing for establishing sealing contact between said sealing means and said wall of the housing.
Dependencies are inferred from the claim text.