System and method for power management during regeneration mode in hybrid electric vehicles for H-3000
First Claim
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1. A method of controlling regenerative braking in a hybrid electric vehicle, comprising:
- detecting a deceleration state of the vehicle, wherein detecting the deceleration state includes detecting a torque provided from a transmission to the electric motor generator, and wherein the electric motor generator is coupled to the transmission;
calculating a predicted vehicle energy loss for a vehicle using a vehicle controller, wherein the vehicle has an electric motor generator and an energy storage system, and wherein the electric motor generator is electrically connected to the energy storage system;
calculating an expected electric motor operating efficiency using the vehicle controller;
calculating a predicted electrical power to supply to the energy storage system using the vehicle controller and the predicted vehicle energy loss; and
generating a regenerative braking power using the electric motor generator operating as a generator, wherein the regenerative braking power is less than or equal to the predicted electrical power to supply to the energy storage system.
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Abstract
A system and method for recovering the optimum power level during regenerative mode is disclosed. Equations for determining the optimum regenerative power level receivable by an energy storage system, for example for any given deceleration event, are derived and disclosed. The equations consider various losses such as the efficiency of the electric motor generator in the generator mode, wind resistance, rolling resistance, transmission losses, engine losses, and losses in the energy storage system. Also disclosed is at least one embodiment of a procedure for controlling a hybrid drive system to achieve the optimum energy recovery.
90 Citations
23 Claims
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1. A method of controlling regenerative braking in a hybrid electric vehicle, comprising:
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detecting a deceleration state of the vehicle, wherein detecting the deceleration state includes detecting a torque provided from a transmission to the electric motor generator, and wherein the electric motor generator is coupled to the transmission; calculating a predicted vehicle energy loss for a vehicle using a vehicle controller, wherein the vehicle has an electric motor generator and an energy storage system, and wherein the electric motor generator is electrically connected to the energy storage system; calculating an expected electric motor operating efficiency using the vehicle controller; calculating a predicted electrical power to supply to the energy storage system using the vehicle controller and the predicted vehicle energy loss; and generating a regenerative braking power using the electric motor generator operating as a generator, wherein the regenerative braking power is less than or equal to the predicted electrical power to supply to the energy storage system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of calculating regenerative braking power, comprising:
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calculating a predicted vehicle energy loss using a vehicle controller in a vehicle having a hybrid system that includes an internal combustion engine, an electric motor generator, and an energy storage system with at least one battery cell, the energy storage system coupled to the electric motor generator, wherein the vehicle controller is configured to calculate the predicted vehicle energy loss using a current rate of deceleration of the vehicle; calculating a predicted electrical power supplied to the energy storage system using the vehicle controller, the vehicle controller calculating the predicted electrical power using the predicted vehicle energy loss; calculating a predicted electrical power loss using the vehicle controller, the vehicle controller calculating the electrical power loss using the predicted electrical power supplied to the energy storage system; calculating a predicted regenerative braking power using the vehicle controller, the vehicle controller calculating the predicted regenerative braking power using the predicted vehicle energy loss, the predicted electrical power supplied to the energy storage system, and the predicted electrical power loss. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification