Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-04-03
2007-04-03
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
11293085
ABSTRACT:
In a valve timing control apparatus, a relative rotational phase between a drive rotational member rotated with a crankshaft and a driven rotational member rotated with a camshaft is controlled by a relative rotational phase-controlling mechanism utilizing a fluid pressure in a fluid pressure chamber divided by a vane. The relative rotational phase can be restrained by a locking mechanism at an intermediate phase between most advanced and most retarded angle phases. As a minimum set torque applied by a biasing mechanism to the drive rotational member relative to the driven rotational member, a larger minimum torque required for change from the most retarded angle phase to the intermediate phase during cranking, at a temperature before warming up while fluid pressure is discharged, or at a minimum temperature for relative rotational phase control while a fluid pressure remains, is selected.
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Kanada Yoji
Komazawa Osamu
A. Marquez, Esq. Juan Carlos
Aisin Seiki Kabushiki Kaisha
Denion Thomas
Eshete Zelalem
Fisher Esq. Stanley P.
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