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AssigneeGM Global Technology Operations LLC
InventorsDavid S. Tokarz, Stefan M. Frick, Joshua F. Pacheco
Estimating the term…
Presented are hybrid electric vehicle (HEV) powertrains and control logic for optimized regenerative braking (regen), methods for making/using such systems, and HEVs with increased regen through reduced engine and transmission friction. A method of operating an HEV includes determining if an REV operating state or fault prevents engagement of a regen control operation and, if not, responsively determining if a torque request for the REV's powertrain is less than a road load on the HEV. The regen control operation is executed responsive to the torque request being less than the road load. The regen control operation includes the power transmission drivingly disconnecting the engine from the road wheels, and the engine operating at a target engine speed. A negative torque offset to maintain a vehicle deceleration rate after disconnecting the engine from the road wheels is calculated; the traction motor outputs a negative torque based on this negative torque offset.
A method of operating a hybrid electric vehicle (HEV), the HEV including a vehicle body, multiple road wheels, and an HEV powertrain, the HEV powertrain including a traction motor and an engine operable to drive the road wheels to thereby propel the HEV, and a power transmission selectively drivingly connecting the engine to one or more of the road wheels, the method comprising:
A hybrid electric vehicle (HEV) comprising:
Dependencies are inferred from the claim text.