Interrelated power delivery controls – including engine control – Electric engine – With transmission control
Reexamination Certificate
2008-10-13
2011-11-22
Ho, Ha D. (Department: 3655)
Interrelated power delivery controls, including engine control
Electric engine
With transmission control
C477S005000, C477S008000
Reexamination Certificate
active
08062174
ABSTRACT:
A method for controlling a powertrain comprising a transmission coupled to an engine and an electric machine adapted to selectively transmit mechanical power to an output member via selective application of a plurality of hydraulically actuated torque transfer clutches includes filling one of the hydraulic clutches to a reference fill volume expected to create a touching state in the clutch, wherein the filling is accomplished through control of a pressure control solenoid, monitoring an actual fill time of the hydraulic clutch, monitoring a flow utilized in the filling, determining a measured fill volume based upon the actual fill time and the flow, calculating a fill volume error based upon the measured fill volume and the reference fill volume, and adjusting the reference fill volume based upon the fill volume error.
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Naqvi Ali K
Sah Jy-Jen F.
GM Global Technology Operations LLC
Ho Ha D.
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