Controls and methods to calculate clutch torque to include seal friction
AssigneeFord Global Technologies, LLC
InventorsHiral Jayantilal Haria, Yuji Fujii, Akshay Bichkar, Yang Xu
Life of this patent
Estimating the term…
Abstract
A hybrid vehicle includes an engine, an electric machine, a disconnect clutch configured to selectively couple the engine to the electric machine, and a controller. The controller is 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.
Claims20
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.
A hybrid vehicle comprising:
- an engine;
- an electric machine;
- a disconnect clutch configured to selectively couple the engine and electric machine;
- and
- a controller programmed to command a target pressure to the disconnect clutch that depends on a seal friction derived from a rate of change of line pressure to the disconnect clutch during a start of the engine with the electric machine.
A method of starting an engine with an electric machine comprising:
- in response to a request to start an engine with an electric machine, commanding a target pressure to a disconnect clutch, which couples the engine and the electric machine, 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.
Dependencies are inferred from the claim text.