Soft-stop braking control
First Claim
Patent Images
1. A method for applying a soft-stop control to the vehicle brake actuators of a vehicle during a vehicle stop operation, said method comprising the steps of:
- detecting a brake apply operation as demanded by the driver having a brake demand greater than a predetermined threshold;
determining if the vehicle speed is between a first threshold stopping speed and a second threshold stopping speed; and
reducing braking pressure to said vehicle brake actuators as a function of vehicle speed, vehicle deceleration, and brake apply pressure if said vehicle speed is between said first threshold stopping speed and said second threshold stopping speed;
wherein said step of reducing said braking pressure is discontinued and said brake apply operation as demanded by the driver is resumed when said vehicle speed becomes less than said second predetermined stopping speed.
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Abstract
A method is provided for applying a soft-stop control to the vehicle brake actuators of a vehicle during a vehicle stop operation. A brake apply operation is detected. A determination is made whether the vehicle speed is below a first threshold stopping speed. Braking pressure to the vehicle actuators is reduced as a function of vehicle speed, vehicle deceleration, and brake apply pressure if the vehicle speed is below the first threshold stopping speed.
43 Citations
19 Claims
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1. A method for applying a soft-stop control to the vehicle brake actuators of a vehicle during a vehicle stop operation, said method comprising the steps of:
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detecting a brake apply operation as demanded by the driver having a brake demand greater than a predetermined threshold; determining if the vehicle speed is between a first threshold stopping speed and a second threshold stopping speed; and reducing braking pressure to said vehicle brake actuators as a function of vehicle speed, vehicle deceleration, and brake apply pressure if said vehicle speed is between said first threshold stopping speed and said second threshold stopping speed; wherein said step of reducing said braking pressure is discontinued and said brake apply operation as demanded by the driver is resumed when said vehicle speed becomes less than said second predetermined stopping speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for applying a soft-stop control to the vehicle brake actuators of a vehicle during a vehicle stop operation, said method comprising the steps of:
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detecting a brake apply operation by a driver in response to a master cylinder pressure being above a predetermined braking rate threshold; determining that a secondary brake operation is inactive; determining that a vehicle speed is between a first threshold stopping speed and a second threshold stopping speed; reducing brake pressure to said vehicle brake actuators as a function of said master cylinder pressure, said vehicle speed, and a vehicle deceleration if said secondary brake operation is inactive and said vehicle speed is between said first and second threshold stopping speeds; discontinuing said step of reducing brake pressure when said vehicle speed is less than said second threshold storming speed; and resuming said brake apply operation as demanded by said driver in response to said vehicle speed being less than said second threshold stopping speed. - View Dependent Claims (16, 17)
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18. A method for applying a soft-stop control to the vehicle brake actuators of a vehicle during a vehicle stop operation, said method comprising the steps of:
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detecting a brake apply operation by an activation of a brake switch; determining that a secondary brake operation is inactive; determining that a vehicle speed is between a first threshold stopping speed and a second threshold stopping speed; and reducing brake pressure to said vehicle brake actuators as a function of said master cylinder pressure, said vehicle speed, and a vehicle deceleration if said secondary brake operation is inactive and said vehicle speed is between said first and second threshold stopping speed; discontinuing said step of reducing brake pressure when said vehicle speed is less than said second threshold storming speed; and resuming said brake apply operation as demanded by a driver in response to said vehicle speed being less than said second threshold stopping speed.
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19. A method for applying a soft-stop control to the vehicle brake actuators of a vehicle during a vehicle stop operation, said method comprising the steps of:
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detecting a brake apply operation by sensing a travel of a brake pedal greater than a predetermined brake pedal travel threshold; determining that a secondary brake operation is inactive; determining that a vehicle speed is between a first threshold stopping speed and a second threshold stopping speed; reducing brake pressure to said vehicle brake actuators as a function of said master cylinder pressure, said vehicle speed, and a vehicle deceleration if said secondary brake operation is inactive and said vehicle speed is between said first and second threshold stopping speed; discontinuing said step of reducing brake pressure when said vehicle speed is less than said second threshold stopping speed; and resuming said brake apply operation as demanded by said travel of said brake pedal in response to said vehicle speed being less than said second threshold stopping speed.
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Specification