Camshaft adjustment control device

Details Camshaft adjustment control device Camshaft adjustment control device

2005-12-06

2005-12-06

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

06971353

ABSTRACT:
In a camshaft adjustment control device for an internal combustion engine arranged in the drive train for a camshaft, with an inner body connected to the camshaft and an outer body rotatable relative to the inner body, and a control space between the inner and the outer bodies to which hydraulic fluid can be supplied for adjusting the relative angular positions of the inner body connected to the camshaft and the outer body driven by the crankshaft, the inner body is mounted to the camshaft by a bolt having a central bore in which a control spool valve is disposed controlling the flow of fluid to and from the control space and a check valve is arranged in the supply lines of the hydraulic fluid to the control spool valve which check valve opens when a certain pressure is applied thereto.

REFERENCES:
patent: 6363896 (2002-04-01), Speier
patent: 6460559 (2002-10-01), Smith et al.
patent: 6481402 (2002-11-01), Simpson et al.
patent: 6810843 (2004-11-01), Quinn, Jr.
patent: 2002/0088417 (2002-07-01), Palesch et al.
patent: 198 17 319 (1999-10-01), None
patent: 199 30 711 (2000-08-01), None

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