CPC B60K 23/08 (2013.01) [B60K 17/02 (2013.01); B60K 17/348 (2013.01); F16D 48/06 (2013.01); F16D 2500/10431 (2013.01); F16D 2500/30404 (2013.01); F16D 2500/30406 (2013.01); F16D 2500/3108 (2013.01)] | 7 Claims |
1. An all-wheel-drive vehicle comprising:
an engine;
a primary axle operably coupled to the engine;
a secondary axle including an input operably coupled to the engine, a first halfshaft, a second halfshaft, a first clutch selectively connecting the first halfshaft to the input, and a second clutch selectively connecting the second halfshaft to the input; and
a transmission having an input coupled to the engine and output coupled to the primary drive axle;
a power-transfer unit coupled to the transmission and including a third clutch; and
a driveshaft coupling the power-transfer unit and the input, wherein the third clutch selectively couples the output to the driveshaft;
a controller programmed to, during a power-limiting routine, command a torque to the engine based on closed-loop feedback control such that the torque decreases when a calculated slip of a selected one of the first and second clutches is greater than a target slip of the selected clutch and increases when the calculated slip is less than the target slip.
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