US 12,233,848 B2
Controls and methods to calculate clutch torque to include seal friction
Hiral Jayantilal Haria, Ypsilanti, MI (US); Yuji Fujii, Ann Arbor, MI (US); Akshay Bichkar, Ann Arbor, MI (US); and Yang Xu, Dearborn, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Jul. 14, 2021, as Appl. No. 17/375,125.
Prior Publication US 2023/0026225 A1, Jan. 26, 2023
Int. Cl. B60W 20/40 (2016.01); B60W 10/02 (2006.01); B60W 10/06 (2006.01); B60W 10/08 (2006.01)
CPC B60W 20/40 (2013.01) [B60W 10/02 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 2510/0225 (2013.01); B60W 2510/0275 (2013.01); B60W 2510/0291 (2013.01); B60W 2510/107 (2013.01); B60W 2510/1075 (2013.01); B60W 2710/022 (2013.01); B60W 2710/029 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hybrid vehicle comprising:
an engine;
an electric machine;
a disconnect clutch configured to selectively couple the engine to the electric machine; and
a controller programmed to, in response to a request to start the engine with the electric machine, command a target pressure to the disconnect clutch that depends on a seal friction derived from a measured line pressure of the disconnect clutch and a rate change of the measured line pressure.