Internal-combustion engines – Engine speed regulator – Responsive to deceleration mode
Reexamination Certificate
2008-04-04
2009-11-03
Kwon, John T (Department: 3747)
Internal-combustion engines
Engine speed regulator
Responsive to deceleration mode
C123S345000, C123S090150
Reexamination Certificate
active
07610897
ABSTRACT:
A valve control system includes a vehicle control module that generates a lift mode command signal to transition one of intake and exhaust valves between N open lift modes. A time module generates a response time signal that indicates a duration of the transition and a lift limit signal that disables the transition. The time module generates the response time and lift limit signals based on current lift mode and status signals. The current lift mode signal indicates a current lift state of one of the intake and exhaust valves. The status signal indicates status of a lift control valve. The lift control valve actuates one of the intake valve and the exhaust valve. The event module generates the current lift mode and status signals based on the lift command signal, the response time signal, and the lift limit signal. One of the time and event modules enables the transition.
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GM Global Technology Operations Inc.
Harness, Dickey & and Pierce, P.L.C.
Kwon John T
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