Control valve for a device to modify the timing of an...

Details Control valve for a device to modify the timing of an... Control valve for a device to modify the timing of an...

2005-07-18

2009-02-10

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090310, C137S625640, C137S625650

Reexamination Certificate

active

07487752

ABSTRACT:
A control valve (18) for a device (1) to modify the timing of an internal combustion engine is provided. Here, a controlled rotation of the camshaft in reference to the crankshaft can be achieved via a hydraulic adjustment drive. A control valve (18) with operative connectors (A, B), a hydraulic connector (P), and at least one reservoir connector (T, T1, T2) controls the inflow of hydraulic fluid into and/or the outflow of hydraulic fluid out of the hydraulic adjustment drive. A filter (46) is arranged between the hydraulic connector (P) and the operative connectors (A, B).

REFERENCES:
patent: 5062454 (1991-11-01), Ichihashi et al.
patent: 6382148 (2002-05-01), Maeyama et al.
patent: 2002/0026914 (2002-03-01), Maeyama et al.
patent: 10027080 (2001-03-01), None
patent: 10232528 (2004-07-01), None
patent: 2001317323 (2001-11-01), None

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