Valvetrain control systems for internal combustion engines...

Details Valvetrain control systems for internal combustion engines... Valvetrain control systems for internal combustion engines...

2011-07-12

2011-07-12

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

C123S090150

Reexamination Certificate

active

07979195

ABSTRACT:
A valve control system for an internal combustion engine includes a valve actuation system that actuates each of an intake valve and an exhaust valve between N open lift modes where N is an integer greater than one. A control module defines a switching window having a start time based on intake valve timing and an end time based on exhaust valve timing. The control module enables transitioning of at least one of the intake and exhaust valves between the N open lift modes based on the switching window.

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