Operator reaction dependent stand-by brake torque build-up rate controlling scheme
First Claim
1. A system for stand-by brake torque control wherein brake pressure increases till completion of pressure build-up for stand-by take torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the system comprising:
- an obstacle recognition system detecting a distance to the obstacle preceding the vehicle;
a vehicle speed sensor detecting traveling speed of the vehicle;
an accelerator operable by an operator of the vehicle;
an accelerator sensor detecting operator demand for vehicle acceleration from motion of the accelerator;
an operator reaction responsive sensor detecting reaction by the operator; and
a controller programmed;
to perform stand-by brake torque control before operator action for braking, to select one of predetermined different emergency levels in response to at least one of the detected distance the detected traveling speed, the detected operator demand, and the detected reaction, and to determine one of various variation rates in response to the selected one emergency level for initiating the stand-by brake torque control by increasing brake pressure at the determined one variation rate till completion of pressure build-up for stand-by brake torque applied to the vehicle.
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Abstract
The present invention pertains a controlling scheme for build-up or variation rate at which brake pressure increases till completion of pressure build-up for stand-by brake torque. Stand-by brake torque control begins with recognition of emergency or occurrence of operator reaction or quick release of accelerator. During initial stage of the stand-by brake control, brake pressure increases till completion of pressure build-up for stand-by brake torque before vehicle operator depresses a brake pedal. Build-up or variation rate at which brake pressure increases till completion of pressure build-up for stand-by brake torque is determined in response to time left before the operator depresses the brake pedal. Period of time left before the operator depresses the brake pedal varies with differing events that have initiated the stand-by brake torque control.
15 Citations
11 Claims
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1. A system for stand-by brake torque control wherein brake pressure increases till completion of pressure build-up for stand-by take torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the system comprising:
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an obstacle recognition system detecting a distance to the obstacle preceding the vehicle;
a vehicle speed sensor detecting traveling speed of the vehicle;
an accelerator operable by an operator of the vehicle;
an accelerator sensor detecting operator demand for vehicle acceleration from motion of the accelerator;
an operator reaction responsive sensor detecting reaction by the operator; and
a controller programmed;
to perform stand-by brake torque control before operator action for braking, to select one of predetermined different emergency levels in response to at least one of the detected distance the detected traveling speed, the detected operator demand, and the detected reaction, and to determine one of various variation rates in response to the selected one emergency level for initiating the stand-by brake torque control by increasing brake pressure at the determined one variation rate till completion of pressure build-up for stand-by brake torque applied to the vehicle. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for stand-by brake torque control wherein brake pressure increases till completion of pressure build-up for stand-by brake torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the vehicle having an accelerator and a brake pedal, the method comprising:
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initiating stand-by brake torque control upon determination of one of events that include recognition of emergency, operator reaction, and quick release of the accelerator;
determining a variation rate at which brake pressure increases till completion of pressure build-up for stand-by brake torque applied to the vehicle in response to time left before the vehicle operator depresses the brake pedal after determining the one event; and
increasing brake pressure at the determined variation rate till completion of pressure build-up for stand-by brake torque before the vehicle operator depresses the brake pedal. - View Dependent Claims (8, 9, 10)
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11. A system for stand-by brake torque control wherein brake pressure increases till completion of pressure build-up for stand-by brake torque applied to an automotive vehicle under a condition of approaching or following an obstacle preceding the vehicle, the vehicle having an accelerator and a brake pedal, the system comprising:
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means for initiating stand-by brake torque control upon determination of one of events that include recognition of emergency, operator reaction, and quick release of the accelerator;
means for determining a variation rate at which brake pressure increases till completion of pressure build-up for stand-by brake torque applied to the vehicle in response to time left before the vehicle operator depresses the brake pedal after determining the one event; and
means for increasing brake pressure at the determined variation rate till completion of pressure build-up for stand-by brake torque before the vehicle operator depresses the brake pedal.
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Specification