System and method of controlling a hybrid electric vehicle
First Claim
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1. A system for controlling torque in a hybrid electric vehicle, the system comprising:
- primary and secondary power sources;
a power transfer system adapted to be powered by at least one of the primary and secondary power sources to drive a vehicle traction wheel; and
a control system for controlling operation of the power transfer system and primary and secondary power sources, the control system being configured to process signals indicative of a primary power source speed command, a maximum primary power source speed command, and a primary power source speed;
wherein the control system decreases output torque of the primary power source when the primary power source speed command is sufficiently close to the maximum primary power source speed command and the primary power source speed exceeds the primary power source speed command by at least a predetermined amount.
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Abstract
A system and method of controlling engine torque in a hybrid electric vehicle. The method includes comparing an engine speed command to a maximum engine speed command, comparing an engine speed value to the engine speed command, and adjusting the engine torque command if the engine speed command is within a predetermined threshold to the maximum engine speed command and the engine speed exceeds the engine speed command by at least a predetermined amount.
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Citations
20 Claims
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1. A system for controlling torque in a hybrid electric vehicle, the system comprising:
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primary and secondary power sources; a power transfer system adapted to be powered by at least one of the primary and secondary power sources to drive a vehicle traction wheel; and a control system for controlling operation of the power transfer system and primary and secondary power sources, the control system being configured to process signals indicative of a primary power source speed command, a maximum primary power source speed command, and a primary power source speed; wherein the control system decreases output torque of the primary power source when the primary power source speed command is sufficiently close to the maximum primary power source speed command and the primary power source speed exceeds the primary power source speed command by at least a predetermined amount. - View Dependent Claims (2, 3, 4)
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5. A method of controlling engine torque in a hybrid electric vehicle, the method comprising:
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determining whether an engine speed command is within a predetermined range of a maximum engine speed command; determining whether an engine speed exceeds the engine speed command by at least a predetermined amount; calculating an error value when the engine speed command is within the predetermined range and the engine speed exceeds the engine speed command by at least the predetermined amount; determining a torque adjustment value based on the error value; and updating an engine torque command value based on the torque adjustment value to reduce engine speed. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method of controlling engine torque in a hybrid electric vehicle, the method comprising:
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comparing an engine speed command to a maximum engine speed command; comparing an engine speed value to the engine speed command; and adjusting an engine torque command to control engine speed when the engine speed command is within a predetermined threshold to the maximum engine speed command and the engine speed value exceeds the engine speed command by at least a predetermined amount. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification