Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Reexamination Certificate
2007-05-03
2010-11-16
Beaulieu, Yonel (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
C180S065265
Reexamination Certificate
active
07835841
ABSTRACT:
A control system for a hybrid powertrain which determines engine crank angle position based upon signal inputs from electric machines of the powertrain is provided. The hybrid powertrain comprises an internal combustion engine and electric machines and an electro-mechanical transmission selectively operative to transmit torque therebetween. The electric machines are rotatably fixedly coupled to the internal combustion engine via a transmission input shaft. Control modules are adapted to execute a control scheme to determine engine crank angle position. The control scheme comprises code to determine an input shaft angle based upon rotational positions of the electric machines. An offset angle of the input shaft and an angular twist between the engine and the transmission are determined. An engine crank angle offset is determined based upon the offset angle and the angular twist of the input shaft.
REFERENCES:
patent: 5708216 (1998-01-01), Garshelis
patent: 6953409 (2005-10-01), Schmidt et al.
patent: 7586083 (2009-09-01), Vahabzadeh et al.
patent: 2008/0272717 (2008-11-01), Gleason et al.
Beaulieu Yonel
GM Global Technology Operations Inc.
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