Valvetrain control systems with lift mode transitioning...

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant

Reexamination Certificate

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C701S103000, C123S090150

Reexamination Certificate

active

07974766

ABSTRACT:
A valve control system for an internal combustion engine includes a valve actuation system. The valve actuation system includes lift control valves that actuate at least one of an intake valve and an exhaust valve between N open lift modes, where N is an integer greater than one. A control module enables transitioning of at least one of the intake valve and the exhaust valve between the open lift modes. The control module synchronizes transitions between the N open lift modes with crankshaft and valvetrain timing. The control module generates an engine position synchronization signal based on the transitioning.

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