Patent ID: 11932112
Assignee: FORD GLOBAL TECHNOLOGIES, LLC
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
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 close 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 the electric machine to the engine to start the engine,
control a torque capacity of the disconnect clutch during the engine start according to a feedforward model of a pressure applied to the disconnect clutch, and
control a torque of the electric machine based on an adjusted torque capacity of the disconnect clutch in response to (i) the pressure applied to the disconnect clutch decreasing according to a ramp down phase during the engine start, (ii) a difference between (a) the pressure applied to the disconnect clutch according to the feedforward model and (b) a measured pressure of the disconnect clutch increasing to greater than a first threshold, and (iii) a rate of change of the pressure applied to the disconnect clutch decreasing to less than a second threshold, wherein the adjusted torque capacity of the disconnect clutch is based on the feedforward model of the pressure applied to the disconnect clutch and an offset value.