Engine with variable valve timing

Details Engine with variable valve timing Engine with variable valve timing

2007-09-25

2007-09-25

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090170, C123S090310

Reexamination Certificate

active

11157748

ABSTRACT:
An engine is described having two camshafts14, 16each of which carries two groups of cams and comprises an inner shaft coupled for rotation with a first group of cams and an outer tube rotatably supported by the inner shaft and coupled for rotation with the second group of cams. A phaser12is provided to enable the phase of at least one of the two groups of cams on one of the SAP camshafts14, 16to be varied with reference to the phase of the engine crankshaft. Drive links in the form of meshing gear wheels, drive chains or belts, couple the two corresponding groups of cams on the respective camshafts for rotation in unison with one another.

REFERENCES:
patent: 6953015 (2005-10-01), Asari et al.

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