VEHICLE SPEED CONTROL SYSTEM AND METHOD EMPLOYING TORQUE BALANCING
First Claim
1. A method of operating a speed control system of a vehicle having a plurality of wheels, comprising:
- receiving one or more electrical signals representative of vehicle-related information;
determining, based on the one or more electrical signals representative of vehicle-related information, that one or more of the wheels of the vehicle have overcome an obstacle or are about to overcome an obstacle and that therefore a reduction in an applied drive torque to one or more of the wheels of the vehicle by a powertrain subsystem will be required to maintain the speed of the vehicle at a target set-speed of the speed control system; and
in response to determining that one or more of the wheels of the vehicle have overcome or are about to overcome an obstacle, while maintaining positive powertrain torque to the wheels of the vehicle simultaneously automatically commanding the application of a retarding torque to one or more of the wheels of the vehicle to counteract the effect of an overrun condition in the powertrain subsystem from increasing the speed of the vehicle.
1 Assignment
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Accused Products
Abstract
A method for operating a speed control system of a vehicle having a plurality of wheels is provided. The method comprises receiving one or more electrical signals representative of vehicle-related information. The method further comprises determining, based on the one or more electrical signals representative of vehicle-related information, that one or more of the wheels of the vehicle have overcome an obstacle or are about to overcome an obstacle and that therefore a reduction in an applied drive torque to one or more of the wheels of the vehicle by a powertrain subsystem (applied drive torque) will be required to maintain the speed of the vehicle at a target set-speed of the speed control system. The method still further comprises automatically commanding the application of a retarding torque to one or more of the wheels of the vehicle to counteract the effect of an overrun condition in the powertrain subsystem from increasing the speed of the vehicle. A system for controlling the speed of a vehicle comprising an electronic control unit configured to perform the above-described methodology is also provided.
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Citations
33 Claims
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1. A method of operating a speed control system of a vehicle having a plurality of wheels, comprising:
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receiving one or more electrical signals representative of vehicle-related information; determining, based on the one or more electrical signals representative of vehicle-related information, that one or more of the wheels of the vehicle have overcome an obstacle or are about to overcome an obstacle and that therefore a reduction in an applied drive torque to one or more of the wheels of the vehicle by a powertrain subsystem will be required to maintain the speed of the vehicle at a target set-speed of the speed control system; and in response to determining that one or more of the wheels of the vehicle have overcome or are about to overcome an obstacle, while maintaining positive powertrain torque to the wheels of the vehicle simultaneously automatically commanding the application of a retarding torque to one or more of the wheels of the vehicle to counteract the effect of an overrun condition in the powertrain subsystem from increasing the speed of the vehicle. - View Dependent Claims (33)
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2-15. -15. (canceled)
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16. A system for controlling the speed of a vehicle having a plurality of wheels, comprising:
an electronic control unit (ECU), the ECU configured to; receive one or more electrical signals representative of vehicle-related information; determine, based on the one or more electrical signals representative of vehicle-related information, that one or more of the wheels of the vehicle have overcome an obstacle or are about to overcome an obstacle and that therefore a reduction in an applied drive torque to one or more of the wheels of the vehicle by a powertrain subsystem will be required to maintain the speed of the vehicle at a target set-speed of the speed control system; and in response to determining that one or more wheels of the vehicle have overcome or are about to overcome an obstacle, while maintaining positive powertrain torque to the wheels of the vehicle simultaneously automatically command the application of a retarding torque to one or more of the wheels of the vehicle to counteract the effect of an overrun condition in the powertrain subsystem from increasing the speed of the vehicle. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A vehicle having a plurality of wheels and comprising a system for controlling the speed of a vehicle having a plurality of wheels, the system comprising:
an electronic control unit (ECU), the ECU configured to; receive one or more electrical signals representative of vehicle-related information; determine, based on the one or more electrical signals representative of vehicle-related information, that one or more of the wheels of the vehicle have overcome an obstacle or are about to overcome an obstacle and that therefore a reduction in an applied drive torque to one or more of the wheels of the vehicle by a powertrain subsystem will be required to maintain the speed of the vehicle at a target set-speed of the speed control system; and in response to determining that one or more wheels of the vehicle have overcome or are about to overcome an obstacle, while maintaining positive powertrain torque to the wheels of the vehicle simultaneously automatically command the application of a retarding torque to one or more of the wheels of the vehicle to counteract the effect of an overrun condition in the powertrain subsystem from increasing the speed of the vehicle.
Specification