Camshaft phaser for internal combustion engine

Details Camshaft phaser for internal combustion engine Camshaft phaser for internal combustion engine

2009-07-24

2011-11-22

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

08061319

ABSTRACT:
A camshaft phaser for an internal combustion engine includes a rotor which is rotationally coupled to a camshaft and a hydraulic positioning system for timing the rotor and camshaft with respect to the crankshaft of an engine. A bypass circuit permits hydraulic fluid, such as engine lubricating oil, to flow through at least a portion of the phaser without affecting timing of the camshaft with respect to the crankshaft. In this manner, the phaser may be warmed up rapidly, without adversely affecting engine operation.

REFERENCES:
patent: 2007/0175425 (2007-08-01), Berndorfer
patent: 2008/0230025 (2008-09-01), Ikihara et al.

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