Simplified control for optimized hybrid vehicle powertrain operation
AssigneeRobert Bosch GmbH
InventorsZiheng Pan, Shyam Jade, Huei Peng
Life of this patent
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Abstract
Methods and systems for calibrating a hybrid vehicle system for simplified control of the powertrain to optimize fuel efficiency of the hybrid vehicle and for operating a hybrid vehicle powertrain accordingly. The optimization mechanism reduces the optimized control problem to a single degree-of-freedom. Accordingly, during real-time operation of the hybrid vehicle, the system is able to quickly identify and apply optimized operating settings for a particular driver demand and, in some implementations, to provide a particular rate of change of the state-of-charge of the battery of the hybrid vehicle.
Claims20
A method for optimized control of a hybrid vehicle powertrain, the method comprising:
- determining, by an electronic controller, a plurality of operation points for a vehicle demand,
- wherein each operation point defines a set of operating settings that, when applied to the hybrid vehicle powertrain, will cause the vehicle to perform according to the vehicle demand, wherein the set of operating settings includes an engine torque for a combustion engine of the hybrid vehicle and a motor torque for an electric motor of the hybrid vehicle, and
- wherein the vehicle demand includes a target vehicle torque;
- determining, by the electronic controller, a fuel consumption rate and a rate of change of the state-of-charge of a battery of the hybrid vehicle for each of the plurality of operation points;
- and
- defining an optimization function for the hybrid vehicle, wherein the optimization function defines a set of operation points from the plurality of operation points that each provides a lowest fuel consumption rate for a different value of a plurality of values of the rate of change of the state-of-charge.
A hybrid vehicle powertrain optimization system comprising an electronic controller configured to:
- determine a plurality of operation points each capable of operating a hybrid vehicle powertrain to provide vehicle performance in accordance with a vehicle demand,
- wherein each operation point defines a set of operating settings including an engine torque for a combustion engine of the hybrid vehicle and a motor torque for an electric motor of the hybrid vehicle, and
- wherein the vehicle demand includes a target vehicle torque;
- determine a fuel consumption rate and a rate of change of the state-of-charge of a battery of the hybrid vehicle for each of the plurality of operation points;
- and
- define an optimization function for the hybrid vehicle, wherein the optimization function defines a set of operation points from the plurality of operation points that each provide a lowest fuel consumption rate for a different value of a plurality of values of the rate of change of the state-of-charge.
Dependencies are inferred from the claim text.