Valve timing control device

Details Valve timing control device Valve timing control device

2011-04-05

2011-04-05

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C464S160000

Reexamination Certificate

active

07918198

ABSTRACT:
A valve timing control device includes a phase displacement restricting mechanism for creating a restricting state where relative rotational phase displacement of a driven side rotational member relative to a driving side rotational member is restricted within a permissible range and an unrestricting state where the restriction is released, a communication passageway for establishing communication between the phase displacement restricting mechanism and one of an advanced angle chamber and a retarded angle chamber, a valving element chamber provided midway the communication passageway, a valving element provided in the valving element chamber; the valving element selectively positioned to a closing state for closing the communication passageway to render the phase displacement restricting mechanism into the restricting state and an opening state for opening up the communication passageway to render the phase displacement restricting mechanism into the unrestricting state, and a leak passageway formed in the valving element and configured to allow leakage of fluid from an intermediate passage to the outside when the valving element is under the closing state.

REFERENCES:
patent: 7363898 (2008-04-01), Suzuki et al.
patent: 7444964 (2008-11-01), Kanada et al.

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