Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2008-09-09
2008-09-09
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C464S160000, C074S640000, C474S005000
Reexamination Certificate
active
11507758
ABSTRACT:
A camshaft phaser comprising first and second harmonic gear drive (HD) units disposed in back-to-back relationship. Each HD includes an elliptical wave generator (WG), a flexspline (FS) deformable by the WG, and a circular spline (CS) for engaging the FS. A dynamic spline (DS) connects the first and second FSs. The first HD is an input HD driven by an engine crankshaft via a sprocket wheel connected to the input CS. The second HD is an output HD driving an engine camshaft. The DS is meshed with both the input FS and the output FS. The phase relationship between the crankshaft and the camshaft may be changed by changing the angular relationship between the first and second WGs. Such change is effected by holding the first WG stationary and varying the angular position of the second WG via an electric motor.
REFERENCES:
patent: 4770060 (1988-09-01), Elrod et al.
patent: 4771742 (1988-09-01), Nelson et al.
patent: 5042380 (1991-08-01), Quinci
patent: 5058536 (1991-10-01), Johnston
patent: 5136887 (1992-08-01), Elrod et al.
patent: 5161429 (1992-11-01), Elrod et al.
patent: 5253546 (1993-10-01), Elrod et al.
patent: 5417186 (1995-05-01), Elrod et al.
patent: 5937710 (1999-08-01), Gould et al.
patent: 6257186 (2001-07-01), Heer
patent: 6302073 (2001-10-01), Heer
patent: 6328006 (2001-12-01), Heer
patent: 6915767 (2005-07-01), Pfeiffer et al.
patent: 2006/0000435 (2006-01-01), Aust et al.
patent: 102005025740 (2005-12-01), None
patent: 0440314 (1987-02-01), None
patent: 1813783 (2007-01-01), None
patent: 2354553 (2001-03-01), None
patent: 02067405 (1990-07-01), None
patent: WO 2005/080757 (2005-09-01), None
Yudong Zhao and Jiqing Lu, A Mechanism With Twin Harmonic Drives for Camshaft Phase Adjustment on DOHC Engines, SAE, San Antonio, Texas, Oct. 14-17, 1996.
Lequesne Bruno
Taye Elias
Chang Ching
Delphi Technologies Inc.
Smith Michael D.
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