Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2008-04-04
2010-12-07
Denion, Thomas E (Department: 3743)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S321000, C123S345000
Reexamination Certificate
active
07845319
ABSTRACT:
A valve control system for an internal combustion engine includes a valve actuation system. The valve actuation system includes at least one of first and second configurations. The first configuration includes a shared lift control valve that actuates an intake valve and an exhaust valve between N open lift modes, where N is an integer greater than one. A second configuration includes a first lift control valve that actuates the intake valve and not the exhaust valve and a second lift control valve that actuates the exhaust valve and not the intake valve between the N open lift modes. A control module that enables transitioning of at least one of the intake and exhaust valves between the N open lift modes for the first and second configurations.
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Bernstein Daniel A
Denion Thomas E
GM Global Technology Operations Inc.
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