Method and system for controlling stand-by braking torque applied to automotive vehicle
First Claim
1. A method for controlling a stand-by braking torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the automotive vehicle having a powering system for applying a driving torque to the vehicle in response to an operator power demand, the method comprising:
- determining a variable indicative of dynamic situation of the vehicle;
sampling the determined values of the dynamic situation indicative variable immediately before an operator braking action to reduce the speed of the vehicle is imminent;
using the sampled values of the dynamic situation indicative variable as a basis to establish a parameter; and
using the established parameter as a basis to determine a target value of stand-by braking torque, which is to be applied when the operator braking action to reduce the speed of the vehicle is imminent.
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Accused Products
Abstract
The present invention pertains a method and a system for controlling a stand-by braking torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the automotive vehicle having a powering system for applying a driving torque to the vehicle in response to an operator power demand. A brake controller executes a series of instructions for determining a variable indicative of dynamic situation of the vehicle, for sampling the determined values of the dynamic situation indicative variable immediately before an operator braking action to reduce the speed of the vehicle is imminent, for using the sampled values of the dynamic situation indicative variable as a basis to establish a parameter, and for using the established parameter as a basis to determine a target value of stand-by braking torque.
17 Citations
20 Claims
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1. A method for controlling a stand-by braking torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the automotive vehicle having a powering system for applying a driving torque to the vehicle in response to an operator power demand, the method comprising:
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determining a variable indicative of dynamic situation of the vehicle;
sampling the determined values of the dynamic situation indicative variable immediately before an operator braking action to reduce the speed of the vehicle is imminent;
using the sampled values of the dynamic situation indicative variable as a basis to establish a parameter; and
using the established parameter as a basis to determine a target value of stand-by braking torque, which is to be applied when the operator braking action to reduce the speed of the vehicle is imminent. - View Dependent Claims (2)
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3. A system for controlling a stand-by braking torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the automotive vehicle having a powering system for applying a driving torque to the vehicle in response to an operator power demand through an accelerator pedal, the system comprising:
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a detection system for detecting a distance between the vehicle and the obstacle preceding the vehicle;
a sensor for detecting an operation parameter indicative of vehicle speed of the automotive vehicle;
a sensor for detecting a depressed angle of the accelerator pedal indicative of operator power demand;
a system for determining a longitudinal acceleration to which the automotive vehicle is subject to;
a braking system for application of braking toque to the vehicle in response to a brake signal; and
a controller for determining whether or not an operator braking action to reduce the speed of the vehicle is imminent under a condition of approaching or following an obstacle preceding the vehicle based on the detected distance by the detection system, the vehicle speed, and the operator power demand, determining a target value of hydraulic brake pressure for stand-by braking torque based on the determined value of longitudinal acceleration before determination that the operator braking action is imminent, determining the brake signal for the determined target value of hydraulic pressure, and applying the determined brake signal to the braking system upon determination that the operator braking action is imminent. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for controlling a stand-by braking torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the automotive vehicle having a powering system for applying a driving torque to the vehicle in response to an operator power demand through an accelerator pedal, the method comprising:
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detecting a distance between the vehicle and the obstacle preceding the vehicle;
detecting an operation parameter indicative of vehicle speed of the automotive vehicle;
detecting a depressed angle of the accelerator pedal indicative of operator power demand;
determining a longitudinal acceleration to which the automotive vehicle is subject to;
applying braking toque to the vehicle in response to a brake signal;
determining whether or not an operator braking action to reduce the speed of the vehicle is imminent under a condition of approaching or following an obstacle preceding the vehicle based on the detected distance, the vehicle speed, and the operator power demand;
determining a target value of hydraulic brake pressure for stand-by braking torque based on the determined value of longitudinal acceleration before determination that the operator braking action is imminent;
determining the brake signal for the determined target value of hydraulic pressure; and
applying the determined brake signal upon determination that the operator braking action is imminent.
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18. A system for controlling a stand-by braking torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the automotive vehicle having a powering system for applying a driving torque to the vehicle in response to an operator power demand through an accelerator pedal, the system comprising:
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means for detecting a distance between the vehicle and the obstacle preceding the vehicle;
means for detecting an operation parameter indicative of vehicle speed of the automotive vehicle;
means for detecting a depressed angle of the accelerator pedal indicative of operator power demand;
means for determining a longitudinal acceleration to which the automotive vehicle is subject to;
means for applying braking toque to the vehicle in response to a brake signal;
means for determining whether or not an operator braking action to reduce the speed of the vehicle is imminent under a condition of approaching or following an obstacle preceding the vehicle based on the detected distance, the vehicle speed, and the operator power demand;
means for determining a target value of hydraulic brake pressure for stand-by braking torque based on the determined value of longitudinal acceleration before determination that the operator braking action is imminent;
means for determining the brake signal for the determined target value of hydraulic pressure; and
means for applying the determined brake signal upon determination that the operator braking action is imminent.
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19. An automotive vehicle having a powering system for applying a driving torque to the vehicle in response to an operator power demand through an accelerator pedal, the automotive vehicle comprising:
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a detection system for detecting a distance between the vehicle and the obstacle preceding the vehicle;
a sensor for detecting an operation parameter indicative of vehicle speed of the automotive vehicle;
a sensor for detecting a depressed angle of the accelerator pedal indicative of operator power demand;
a system for determining a longitudinal acceleration to which the automotive vehicle is subject to;
a braking system for application of braking toque to the vehicle in response to a brake signal; and
a controller for determining whether or not an operator braking action to reduce the speed of the vehicle is imminent under a condition of approaching or following an obstacle preceding the vehicle based on the detected distance by the detection system, the vehicle speed, and the operator power demand, determining a target value of hydraulic brake pressure for stand-by braking torque based on the determined value of longitudinal acceleration before determination that the operator braking action is imminent, determining the brake signal for the determined target value of hydraulic pressure, and applying the determined brake signal to the braking system upon determination that the operator braking action is imminent.
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20. A computer readable storage medium having information stored thereon representing instructions executable by a brake controller to control stand-by braking torque, the computer readable storage medium comprising:
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instructions for determining a variable indicative of dynamic situation of the vehicle;
instructions for sampling the determined values of the dynamic situation indicative variable immediately before an operator braking action to reduce the speed of the vehicle is imminent;
instructions for establishing a parameter based on the sampled values of the dynamic situation indicative variable; and
instructions for using the established parameter to determine a target value of stand-by braking torque.
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Specification