POWERTRAIN TORQUE CONTROL DURING SHIFT TO FOUR-WHEEL DRIVE IN AUTOMATED-DRIVING MODE

A vehicle includes a primary axle, a secondary axle, and a powertrain. The powertrain has an engine coupled to the primary axle and selectively coupled to the secondary axle. The vehicle also includes a clutch associated with the secondary axle. A controller is programmed to, responsive to (i) a req...

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Hauptverfasser: Bruns, Richard David, Frey, Michael, Tomik, Filip
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creator Bruns, Richard David
Frey, Michael
Tomik, Filip
description A vehicle includes a primary axle, a secondary axle, and a powertrain. The powertrain has an engine coupled to the primary axle and selectively coupled to the secondary axle. The vehicle also includes a clutch associated with the secondary axle. A controller is programmed to, responsive to (i) a request to shift from two-wheel drive to four-wheel drive and (ii) a current engine-torque command exceeding a torque limit associated with the clutch, override the current engine-torque command to reduce a torque of the engine below the torque limit, and, responsive to the torque of the engine being less the torque limit, command engagement of the clutch.
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subjects CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION
CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES
PERFORMING OPERATIONS
ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT
TRANSPORTING
VEHICLES IN GENERAL
title POWERTRAIN TORQUE CONTROL DURING SHIFT TO FOUR-WHEEL DRIVE IN AUTOMATED-DRIVING MODE
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