US 12,558,971 B2 · Physics-based dimension reduction strategies for online torque optimization in electrified vehicles

Abstract

A torque optimization system for an electrified vehicle having an electrified powertrain including three electric motors a, b, and c and an additional torque generating system includes a set of sensors configured to measure a set of operating parameters of the electrified vehicle and a control system configured to determine a torque relationship between electric motors b and c, solving a three-dimensional (3D) optimization problem for the electrified powertrain, the 3D optimization problem defining torques generatable by one of electric motors b and c, electric motor a, and the additional torque generating system, determine torque commands for the three electric motors a, b, and c and the torque generating system based on the solving of the 3D optimization problem, the determined torque relationship, and the set of operating parameters, and control the electrified powertrain based on the determined torque commands.

Claims18

Dependent claims

A torque optimization system for a range-extended electrified vehicle (REEV) having an electrified powertrain including an internal combustion engine and three electric motors a, b, and c, the torque optimization system comprising:

a set of sensors configured to measure a set of operating parameters of the REEV;
and
a control system configured to:
reduce a four-dimensional (4D) optimization problem for the electrified powertrain to a three-dimensional (3D) optimization problem, the 4D optimization problem defining torques generatable by the three electric motors a, b, and c and engine, wherein the reducing comprises determining modified battery power constraints representing two concentric circles having respective radii that define possible torques for electric motors b and c;
solve the 3D optimization problem by modifying the radii based on a known torque for electric motor a, wherein electric motor a is associated with the engine;
determine torque commands for the electric motors b and c and the engine based on the solving of the 3D optimization problem and the set of operating parameters and determine a torque command for electric motor a;
and
control the electrified powertrain based on the determined torque commands.

5 more elements

A torque optimization method for a range-extended electrified vehicle (REEV) having an electrified powertrain including an internal combustion engine and three electric motors a, b, and c, the torque optimization method comprising:

receiving, by a control system and from a set of sensors, a set of operating parameters of the REEV;
reducing, by the control system, a four-dimensional (4D) optimization problem for the electrified powertrain to a three-dimensional (3D) optimization problem, the 4D optimization problem defining torques generatable by the three electric motors a, b, and c and engine, wherein the reducing comprises determining modified battery power constraints representing two concentric circles having respective radii that define possible torques for electric motors b and c;
solving, by the control system the 3D optimization problem by modifying the radii based on a known torque for electric motor a, wherein electric motor a is associated with the engine;
determining, by the control system, torque commands for the electric motors b and c and the engine based on the solving of the 3D optimization problem and the set of operating parameters and determine a torque command for electric motor a;
and
controlling, by the control system, the electrified powertrain based on the determined torque commands.

3 more elements

Dependencies are inferred from the claim text.

Physics-based dimension reduction strategies for online torque optimization in electrified vehicles

Life of this patent

Physics-based dimension reduction strategies for online torque optimization in electrified vehicles

Life of this patent

Abstract

Claims18