Method for controlling continuous variable valve timing...

Details Method for controlling continuous variable valve timing... Method for controlling continuous variable valve timing...

2008-07-22

2011-10-25

Kwon, John T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S110000, C123S090110

Reexamination Certificate

active

08046154

ABSTRACT:
A method for controlling a continuous variable valve timing apparatus that can control a phase angle of a camshaft quickly and precisely according to an exemplary embodiment of the present invention may include: calculating a difference between a target phase angle and a current phase angle of a camshaft; determining whether the difference between the target phase angle and the current phase angle of the camshaft is larger than or equal to a predetermined value; calculating a base torque Tbbased on the target phase angle if the difference between the target phase angle and the current phase angle of the camshaft is larger than or equal to the predetermined value; calculating an effective torque Teffby modifying the base torque Tbcorresponding to engine speed and temperature of engine oil; and calculating an effective current Ieffcorresponding to the effective torque Teff.

REFERENCES:
patent: 6650992 (2003-11-01), Jankovic et al.
patent: 7246582 (2007-07-01), Miyakoshi
patent: 2003/0093214 (2003-05-01), Jankovic et al.

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