Gm Global Technolgoy Operations, Inc.

Marsella L White

Michael G Petrucci

A method of determining a regeneration schedule for a vehicle having an internal combustion engine, an electric machine, and a plurality of yaw rate actuators. The method includes determining an allowable yaw rate change based on dynamic conditions of the hybrid vehicle, a combined mitigation potential of the yaw rate actuators, and a regeneration torque command that causes an actual yaw rate change. Determining the regeneration torque command includes comparing the allowable yaw rate change to the combined mitigation potential. If the combined mitigation potential is less than the allowable yaw rate change, the regeneration torque command causes or limits the actual yaw rate change to be lower than the allowable yaw rate change. If the combined mitigation potential is greater than the allowable yaw rate change, the regeneration torque command causes or limits the actual yaw rate change to be substantially equal to the allowable yaw rate change.

Expanding regenerative capacity up to vehicle dynamic limits through integration with mitigative subsystems

A method of calculating an engine torque request value for a vehicle includes a vehicle controller receiving an regeneration torque request value corresponding to a regeneration torque to be generated by an energy recovery mechanism. The vehicle controller further receives a desired acceleration value, and calculates the engine torque request value based on the regeneration torque request value and the desired acceleration value. The vehicle controller may then operate the engine in accordance with the engine torque request value.

Vehicle, system, and method of calculating an engine torque request value

A method of controlling a vehicle having a first axle driven by an internal combustion engine, and a second axle independently driven by an electric device includes determining if the accelerator pedal is disposed in a depressed position or in a non-depressed position, and determining if a brake pedal is disposed in a depressed position or in a non-depressed position. An axle control strategy for controlling energy regeneration of an energy storage device is selected based on the position of the accelerator pedal being in either the depressed position or the non-depressed position, and the position of the brake pedal being in either the depressed position or the non-depressed position. A control signal is communicated to at least one of the first axle or the second axle to implement the selected axle control strategy.

Regeneration strategy for a vehicle having decoupled front and rear axle drive actuators

A method of controlling a vehicle includes calculating a desired deceleration limited regeneration torque request based on a requested deceleration input from a driver. If current dynamic operating conditions of the vehicle are in a performance region that permits an increase to the regeneration torque request, the desired deceleration limited regeneration torque request is increased based on a regeneration torque overhead, to define a modified axle regeneration torque request. Modified torque values are output based on the modified axle regeneration torque request. If the torque control values will cause an estimated yaw rate that is less than a target yaw rate, then the modified torque values are applied. Otherwise, the modified torque values are re-defined until the estimated yaw rate is not greater than the target yaw rate, and the re-defined values of the modified torque values are applied.

Method of increasing regeneration in a hybrid vehicle beyond what is calculated from requested vehicle deceleration

A method for controlling a hybrid vehicle includes the following steps: (a) monitoring, via a controller, a magnitude and direction of a lateral acceleration, longitudinal acceleration, and longitudinal deceleration of the hybrid vehicle; (b) determining, via the controller, vehicle operating conditions in which a hybrid powertrain is allowed to operate in a regenerative state based, at least in part, on the magnitude and direction of the lateral acceleration, longitudinal acceleration, and longitudinal deceleration of the hybrid vehicle; and (c) commanding, via the controller, the hybrid powertrain to operate in the regenerative state when the hybrid vehicle is operating in the determined vehicle operating conditions. The vehicle operating conditions depend, at least in part, on operator commands and the current SOC of the energy storage system.

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Howell, MI, United States of America

Marsella L White