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US 9,399,457 B2Granted
Methods and systems for vehicle driveline torque estimation
AssigneeFord Global Technologies, LLC
InventorsAlex O'Connor Gibson, Jeffrey Allen Doering, Seung-Hoon Lee, Yuji Fujii, James William Loch McCallum, William Russell Goodwin
Life of this patent
Estimating the term…
Abstract
Systems and methods for improving hybrid vehicle torque control are presented. The system and methods included may estimate driveline torque via springs of a dual mass flywheel. The estimated driveline torque may provide feedback for adjusting operation of a driveline disconnect clutch and/or engine torque.
Claims17
A method for operating a hybrid driveline, comprising:
- adjusting engine torque production in response to a torque transferred across a dual mass flywheel, the torque transferred across the dual mass flywheel responsive to an amount of spring deflection within the dual mass flywheel, where a position of an input side of the dual mass flywheel is based on an engine crankshaft position sensor, and where a position of an output side of the dual mass flywheel is based on a dual mass flywheel position sensor located between the dual mass flywheel and a driveline disconnect clutch on the output side of the dual mass flywheel, and where a transmission of the hybrid driveline is shifted into neutral in response to a driver demand torque less than a threshold driver demand torque and a vehicle speed greater than a threshold vehicle speed.
A method for operating a hybrid driveline, comprising:
- adjusting engine torque production in response to a torque delivered across a dual mass flywheel, the torque delivered across the dual mass flywheel responsive to spring deflection in the dual mass flywheel and one or a combination of a first offset and a second offset, the first offset established via shifting a transmission of the hybrid driveline into neutral during a first mode, the second offset established via operating the transmission in a forward gear during a second mode, and shifting the transmission into neutral in response to a reduction in driver demand torque.
A hybrid vehicle system, comprising:
- an engine coupled to a dual mass flywheel;
- a motor selectively coupled to the engine via a driveline disconnect clutch;
- a controller including non-transitory instructions executable to adjust engine torque in response to a torque transferred across the dual mass flywheel, and additional instructions to estimate the torque transferred across the dual mass flywheel based on a position offset between an input side of the dual mass flywheel and an output side of the dual mass flywheel;
- and
- an automatic transmission and additional instructions to shift the automatic transmission into neutral in response to determining the position offset.
2 more elements
Dependencies are inferred from the claim text.