Method and device for automatically initiating an emergency brake procedure in motor vehicles
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Abstract
A method for automatically initiating an emergency braking sequence including preliminary warning braking in motor vehicles, wherein the achievable vehicle deceleration is determined during warning braking and the time of initiating emergency braking is varied as a function of the determined vehicle deceleration.
35 Citations
12 Claims
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1-6. -6. (canceled)
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7. A method for automatically initiating an emergency braking sequence, comprising:
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performing a preliminary warning braking in a motor vehicle;
determining an achievable vehicle deceleration during the preliminary warning braking; and
varying a time of initiating an emergency braking as a function of the determined achievable vehicle deceleration. - View Dependent Claims (8, 9, 10, 11)
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12. A control unit, comprising:
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a situation analyzer unit for determining a point in time for initiating a warning braking and a later, provisional point in time of initiating an emergency braking on the basis of a measured distance to an obstacle and a measured relative velocity of this obstacle, as well as on the basis of a provisional value of a vehicle deceleration; and
an ABS/ESP control unit for modulating a braking pressure as a function of a slip condition of a braked wheel while computing a coefficient of friction of a roadway, the coefficient of friction being determined during the warning braking, the ABS/ESP control unit reporting the determined coefficient of friction to the situation analyzer unit, wherein;
the situation analyzer unit corrects the provisional point in time of initiating an emergency braking on the basis of the vehicle deceleration as given by the determined coefficient of friction.
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Specification