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US 9,415,761 B2Granted
Methods and system for improving hybrid vehicle gear shifting
AssigneeFord Global Technologies, LLC
InventorsAlexander O'Connor Gibson, John Edward Brevick, Seunghoon Lee, Matthew John Shelton, Felix Nedorezov
Life of this patent
Estimating the term…
Abstract
Systems and methods for improving gear shifting of a step-ratio automatic transmission in a hybrid vehicle are presented. The systems and methods may provide for adjusting torque capacity of one or more driveline clutches to reduce driveline torque disturbances that may be related to driveline inertia torque during transmission gear shifting.
Claims20
A method, comprising:
- proportionately adjusting a torque capacity of a torque converter clutch in response to an amplitude of a torque determined via an inertia of one or more devices located upstream of the torque converter clutch, the inertia including inertia of a disconnect clutch and inertia of a motor, the disconnect clutch directly coupled to the motor.
A method, comprising:
- in response to a gear shift request and only when a disconnect clutch is fully closed or slipping, adjusting a torque capacity of a torque converter clutch to a torque capacity less than a torque capacity of the disconnect clutch, the torque capacity of the torque converter clutch further adjusted in response to a combustion torque of an engine and a torque determined via an inertia of one or more devices located upstream of the torque converter clutch.
A method, comprising:
- adjusting a torque capacity of a first clutch located upstream of a transmission input shaft in response to a torque determined via inertia of one or more devices located upstream of the first clutch, the inertia including inertia of a disconnect clutch and inertia of a motor, the disconnect clutch directly coupled to the motor;
- and
- adjusting a torque capacity of a second clutch located upstream of the transmission input shaft in response to an operating condition of the first clutch or a sum of the torque and engine combustion torque exceeding a threshold torque at the transmission input shaft.
Dependencies are inferred from the claim text.