CPC B60W 20/40 (2013.01) [B60W 10/02 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 2510/0208 (2013.01); B60W 2510/083 (2013.01)] | 20 Claims |
1. A vehicle comprising:
a powertrain having an engine and an electric machine each configured to generate power to propel the vehicle;
a disconnect clutch (i) disposed between the engine and the electric machine, (ii) configured to open to disconnect the engine from a remainder of the powertrain, and (iii) configured to closed to connect the engine to the remainder of the powertrain; and
a controller programmed to, in response to a command to start the engine,
close the disconnect clutch to transfer power from electric machine to the engine to start the engine,
control a torque of the disconnect clutch during the engine start via increasing a hydraulic pressure applied to the disconnect clutch, wherein the hydraulic pressure applied to the disconnect clutch is based on a model that compensates for a delay between a torque command to the disconnect clutch and a measured torque of the disconnect clutch, and
adjust the model based on a difference between an expected hydraulic pressure of the disconnect clutch and a measured hydraulic pressure of the disconnect clutch during the engine start.
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