Variable valve lift transition control methods and systems

Details Variable valve lift transition control methods and systems Variable valve lift transition control methods and systems

2008-07-24

2011-11-15

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090170, C464S160000

Reexamination Certificate

active

08056516

ABSTRACT:
A system for controlling a variable valve lift system of an engine comprises a delay module that estimates a total delay based on at least one of a measured and an estimated delay of the variable valve lift system. A variable valve control module commands one of a first transition from a variable valve low-lift profile to a variable valve high-lift profile and a second transition from a variable valve high-lift profile to a variable valve low-lift profile based on the total delay.

REFERENCES:
patent: 6814052 (2004-11-01), Weiss et al.
patent: 6973901 (2005-12-01), Machida

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