Valve timing controller

Details Valve timing controller Valve timing controller

2011-04-26

2011-04-26

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

07931000

ABSTRACT:
A first one-way valve is provided in a first advance passage connecting a hydraulic pump to a control advance chamber. A second one-way valve is provided in a first retard passage connecting the hydraulic pump to a control retard chamber. A first control valve is provided in a second advance passage to bypass the first one-way valve for communication of the first advance passage. A second control valve is provided in a second retard passage to bypass the second one-way valve for communication of the first retard passage. The first control valve operates by the pilot pressure to close the second advance passage at advance controlling and opening it at retard controlling. The second control valve operates by the pilot pressure to close the second retard passage at retard controlling and open it at advance controlling.

REFERENCES:
patent: 6763791 (2004-07-01), Gardner et al.
patent: 2005/0066923 (2005-03-01), Yaoko et al.
patent: 2005/0284433 (2005-12-01), Yaoko et al.
patent: 2007/0107684 (2007-05-01), Takahashi
patent: 2000-213310 (2000-08-01), None
patent: 2001-227310 (2001-08-01), None
patent: 2006046315 (2006-02-01), None
Japanese Office Action dated Jul. 1, 2010, issued in corresponding Japanese Application No. 2006-344047, with English translation.
Co-pending U.S. Appl. No. 11/854,156, filed Sep. 12, 2007.
Co-pending U.S. Appl. No. 11/854,337, filed Sep. 12, 2007.
Co-pending U.S. Appl. No. 11/854,249, filed Sep. 12, 2007.

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