Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2005-08-23
2005-08-23
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090270, C123S090310
Reexamination Certificate
active
06932038
ABSTRACT:
A camshaft phaser wherein camshaft oscillatory torque resulting from opening and closing of an associated engine valve is employed to controllably adjust the degree of advance or retard of the rotor. All advance chambers communicate with a first annular passage, and all retard chambers communicate with a second annular passage. Valve means connecting the first and second annular passages are controllable by a solenoid-actuated piston to permit selective flow of oil between the advance and retard chambers to alter the angular position of the rotor with respect to the stator. The solenoid windings are selectively actuable in response to an engine control module. Preferably, the phaser is a sealed unit, filled with oil at manufacture and requires no oil connection with the oil recirculation system of an engine upon which the phaser is mounted. The phaser is independent of engine oil pressure for actuation.
REFERENCES:
patent: 5117784 (1992-06-01), Schechter et al.
patent: 5337711 (1994-08-01), Hampton
patent: 6453859 (2002-09-01), Smith et al.
patent: 6532921 (2003-03-01), Sato et al.
patent: 6799544 (2004-10-01), Pierik
Chang Ching
Delphi Technologies Inc.
Denion Thomas
Griffin Patrick M.
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