Control of incompatible torque requests in vehicle speed control
First Claim
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1. A system for controlling speed of a vehicle, comprising:
- a prime mover coupled to at least one wheel of the vehicle for applying a positive torque to the at least one wheel in response to an accelerating signal; and
a controller having a control logic for determining an actual distance from a preceding vehicle in front, comparing the actual distance to a set desired distance to determine whether the actual distance is greater than the desired distance, determining whether or not a stand-by braking torque is applied to the at least one wheel, determining an additional torque requested by an automatic distance regulation (ADR) to increase vehicle speed when the actual distance is greater than the desired distance and the stand-by braking torque is not applied, and generating an accelerating signal for the prime mover to apply the additional torque to the at least one wheel.
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Accused Products
Abstract
A system and method for controlling speed of a vehicle include determining whether or not a stand-by braking torque is applied, determining an actual distance from a preceding vehicle in front of a vehicle, comparing the actual distance to a desired distance to determine whether the actual distance is greater than the desired distance, determining motor/engine torque to increase vehicle speed, and applying the motor/engine torque when the actual distance is greater than the desired distance. The system and method terminates application of stand-by braking torque upon receiving operator torque request.
7 Citations
24 Claims
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1. A system for controlling speed of a vehicle, comprising:
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a prime mover coupled to at least one wheel of the vehicle for applying a positive torque to the at least one wheel in response to an accelerating signal; and
a controller having a control logic for determining an actual distance from a preceding vehicle in front, comparing the actual distance to a set desired distance to determine whether the actual distance is greater than the desired distance, determining whether or not a stand-by braking torque is applied to the at least one wheel, determining an additional torque requested by an automatic distance regulation (ADR) to increase vehicle speed when the actual distance is greater than the desired distance and the stand-by braking torque is not applied, and generating an accelerating signal for the prime mover to apply the additional torque to the at least one wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for controlling speed of a vehicle, comprising:
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a braking device coupled to the at least one wheel for applying a braking torque to at least one wheel in response to a braking signal, and a controller having a control logic for determining whether or not there is a need for operator braking action, determining a stand-by braking torque when there is a need for operator braking action, determining whether or not there is operator acceleration request, generating a braking signal for the braking device to apply the stand-by braking torque to the at least one wheel, and terminating application of the stand-by braking torque when there is operator acceleration request. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer readable storage medium having stored data representing instructions readable by a computer to control speed of a vehicle, the computer readable storage medium comprising:
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instructions for determining an actual distance from a preceding vehicle in front;
instructions for comparing the actual distance to a set desired distance to determine whether the actual distance is greater than the desired distance;
instructions for determining whether or not a stand-by braking torque is applied to the at least one wheel;
instructions for determining an additional torque requested by an automatic distance regulation (ADR) to increase vehicle speed when the actual distance is greater than the desired distance and the stand-by braking torque is not applied; and
instructions for applying the additional torque to at least one wheel of the vehicle.
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22. A computer readable storage medium having stored data representing instructions readable by a computer to control speed of a vehicle, the computer readable storage medium comprising:
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instructions for determining whether or not there is a need for operator braking action;
instructions for determining a stand-by braking torque when there is a need for operator braking action;
instructions for determining whether or not there is operator acceleration request;
instructions for applying the stand-by braking torque to at least one wheel of the vehicle; and
instructions for terminating application of the stand-by braking torque when there is operator acceleration request.
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23. A method for controlling speed of a vehicle, comprising:
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determining whether or not there is a need for operator braking action;
determining whether or not there is operator acceleration request;
determining a stand-by braking torque when there is a need for operator braking action;
applying the stand-by braking torque to at least one wheel of the vehicle to reduce vehicle speed of the vehicle;
terminating application of the stand-by braking torque when there is operator acceleration request;
determining an actual distance from a preceding vehicle in front;
comparing the actual distance to a set desired distance to determine whether the actual distance is greater than the desired distance;
determining whether or not a stand-by braking torque is applied to the at least one wheel;
determining an additional torque requested by an automatic distance regulation (ADR) to increase vehicle speed when the actual distance is greater than the desired distance and the stand-by braking torque is not applied; and
applying the additional torque to the at least one wheel to increase vehicle speed of the vehicle.
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24. A system for controlling speed of a vehicle, comprising:
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a detection system to detect environmental data in front of the vehicle;
operator demand sensors to detect vehicle operator request;
a prime mover coupled to at least one wheel of the vehicle for applying a positive torque to the at least one wheel in response to an accelerating signal;
a braking device coupled to the at least one wheel for applying a braking torque to at least one wheel in response to a braking signal; and
controller means having a control logic for determining whether or not there is a need for operator braking action;
determining whether or not there is operator acceleration request;
determining a stand-by braking torque when there is a need for operator braking action;
generating a braking signal for the braking device to apply the stand-by braking torque to the at least one wheel of the vehicle to reduce vehicle speed of the vehicle;
terminating application of the stand-by braking torque when there is operator acceleration request;
determining an actual distance from a preceding vehicle in front;
comparing the actual distance to a set desired distance to determine whether the actual distance is greater than the desired distance;
determining whether or not a stand-by braking torque is applied to the at least one wheel;
determining an additional torque requested by an automatic distance regulation (ADR) to increase vehicle speed when the actual distance is greater than the desired distance and the stand-by braking torque is not applied; and
generating an acceleration signal for the primer mover to apply the additional torque to the at least one wheel to increase speed of the vehicle.
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Specification