Cam synchronization algorithm for engine with variable cam...

Details Cam synchronization algorithm for engine with variable cam... Cam synchronization algorithm for engine with variable cam...

2005-01-11

2005-01-11

Wolfe, Willis R. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S090170

Reexamination Certificate

active

06842691

ABSTRACT:
A system and method for controlling first and second phase shiftable camshafts in a variable cam timing engine is provided. The method includes determining when the first camshaft is moving toward a first scheduled phase angle with respect to the crankshaft with a larger camshaft angular positioning error than the second camshaft. Finally, the method includes slowing down the first camshaft so that synchronized camshaft positioning can be better achieved.

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patent: 5363817 (1994-11-01), Ikeda et al.
patent: 6219611 (2001-04-01), Russell
patent: 6425355 (2002-07-01), Van Der Staay
patent: 6647335 (2003-11-01), Jankovic et al.
patent: 407279724 (1995-10-01), None
patent: 2000137529 (2000-05-01), None
U.S. patent application Ser. No. 10/036,045, filed Nov. 9, 2001, Jankovic; Cooper; Magner; System and Method for Controlling Dual Camshafts in a Variable Cam Timing Engine.

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