Engine friction model adaptation
AssigneeFord Global Technologies, LLC
InventorsJason Meyer, Rajit Johri
Life of this patent
Estimating the term…
Abstract
A hybrid powertrain includes an engine having a crankshaft and a throttle body, and an electric machine having a rotor selectively coupled to the crankshaft via a disconnect clutch. A transmission of the powertrain includes a torque converter having an impeller fixed to the rotor, a turbine disposed on an input shaft of the transmission, and a bypass clutch configured to selectively transmit torque from the impeller to the turbine. A vehicle controller is programmed to, in response to the bypass clutch being open or slipping and the disconnect clutch being closed, command a throttle position of the throttle body based on an error between measured and estimated speeds of the impeller.
Claims20
A hybrid powertrain comprising:
- an engine having a crankshaft and a throttle body;
- an electric machine including a rotor selectively coupled to the crankshaft via a disconnect clutch;
- a transmission including a torque converter having an impeller fixed to the rotor, a turbine disposed on an input shaft of the transmission, and a bypass clutch configured to selectively transmit torque from the impeller to the turbine;
- and
- a controller programmed to, in response to the bypass clutch being open or slipping and the disconnect clutch being closed, command a throttle position of the throttle body based on an error between measured and estimated speeds of the impeller.
A vehicle comprising:
- an engine;
- an electric machine selectively coupled to the engine via a disconnect clutch;
- a torque converter including an impeller, a turbine, and a bypass clutch;
- and
- a controller programmed to, in response to the bypass clutch being open or slipping and the disconnect clutch being closed, generate a torque command for the engine based on an error between measured and estimated speeds of the impeller.
A vehicle comprising:
- an engine having a throttle body;
- an electric machine selectively coupled to the engine via a disconnect clutch;
- a torque converter having an impeller, a turbine, and a bypass clutch;
- and
- a controller programmed to, in response to the bypass clutch being open or slipping and the disconnect clutch being closed, command a throttle position of the throttle body based on an error between measured and estimated speeds of the impeller.
Dependencies are inferred from the claim text.