Method to reduce noise of a cam phaser by controlling the...

Details Method to reduce noise of a cam phaser by controlling the... Method to reduce noise of a cam phaser by controlling the...

2005-01-11

2005-01-11

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

06840202

ABSTRACT:
To reduce the noise caused by torsional reversals of a rotor hitting the phaser housing in a VCT cam timing system. A cam torque actuated phaser (phaser with check valves) the control loop is opened and rather then moving the spool valve to one end or the other end, the spool valve is moved just slightly off null. By doing this the oil ports in the spool passageways that control the motion of the phaser are restricted and the motion of the phaser is reduced. Therefore the noise of the phaser is reduced.

REFERENCES:
patent: 3845694 (1974-11-01), Berg
patent: 5002023 (1991-03-01), Butterfield et al.
patent: 5107804 (1992-04-01), Becker et al.
patent: 5172659 (1992-12-01), Butterfield et al.
patent: 5184578 (1993-02-01), Quinn, Jr. et al.
patent: 5289805 (1994-03-01), Quinn, Jr. et al.
patent: 5361735 (1994-11-01), Butterfield et al.
patent: 5497738 (1996-03-01), Siemon et al.
patent: 5657725 (1997-08-01), Butterfield et al.
patent: 6247434 (2001-06-01), Simpson et al.
patent: 6250265 (2001-06-01), Simpson
patent: 6263846 (2001-07-01), Simpson et al.
patent: 6311655 (2001-11-01), Simpson et al.
patent: 6374787 (2002-04-01), Simpson et al.
patent: 20030033999 (2003-02-01), Gardner et al.

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