Variabe cam phaser for internal combustion engine

Details Variabe cam phaser for internal combustion engine Variabe cam phaser for internal combustion engine

1994-11-18

1995-09-05

Yuen, Henry C.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 74568R, 464 2, 464160, F01L 134

Patent

active

054471265

ABSTRACT:
A variable cam phaser (VCP) is disclosed in various modifications. The VCP includes a piston responsive to pressure in a fluid chamber having an inlet orifice and a plurality of outlets including a first outlet and a plurality of second outlets. A valve slide is movable to cover said second outlets one after another to pressurize the fluid chamber to displace the piston against a return spring. Outer and inner splined slides are drivingly mated with an internal helical spline of a cylindrical body secured to a sprocket and an external helical spline of a stub shaft secured to a camshaft. The splined slides are disposed between the piston and the return spring. Thus, movement of the piston and splined slides assembly in response to pressurization or depressurization of the fluid chamber advances or retards the valve timing or phase angle of the camshaft relative to the sprocket.

REFERENCES:
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patent: 5088456 (1992-02-01), Suga
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patent: 5263442 (1993-11-01), Hara
patent: 5301639 (1994-04-01), Satou
patent: 5309873 (1994-05-01), Suga et al.

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