Variable valve actuating system and method

Details Variable valve actuating system and method Variable valve actuating system and method

2007-01-09

2007-01-09

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090170, C123S090310

Reexamination Certificate

active

10953365

ABSTRACT:
A variable valve actuating apparatus for an internal combustion engine, includes an intake valve timing control device to vary a center phase of an intake valve operation angle, an exhaust valve timing control device to vary a center phase of an exhaust valve operation angle, and an intake valve operation angle control device to vary an intake valve operation angle of the engine. A fail-safe control system is arranged to detect a malfunction of the exhaust valve timing control device; and to adjust an intake valve opening timing at or after an exhaust valve closing timing of the engine, upon detection of the malfunction, by operating at least one of the intake valve control device and the intake valve operation angle control device.

REFERENCES:
patent: 2002/0023604 (2002-02-01), Nohara et al.
patent: 2003/0131814 (2003-07-01), Tsujimura et al.
patent: 2004/0231624 (2004-11-01), Shindou et al.
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U.S. Appl. No. 10/834,119, filed Apr. 29, 2004, Shindou et al.

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