Motor vehicle speed control method and arrangement
First Claim
1. A motor vehicle speed control method comprising:
- detecting distances to an object in front of the motor vehicle by a distance sensor and supplying corresponding signals to a control unit;
forming in the control unit, as a function of at least the instantaneous driving speed and a prescribed desired speed, manipulated variables for setting the driving speed of the motor vehicle as a function of a desired distance; and
if the object is no longer detected by this distance sensor, determining the reason for the loss of detection of the object in the control unit and forming manipulated variable for setting the driving speed by the control unit as a function of the reason for the loss of detection of the object.
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Accused Products
Abstract
In the motor vehicle speed control arrangement, the distance to an object detected in front of the motor vehicle is detected by a distance sensor and supplied to a control unit which forms one or more manipulated variables for setting the driving speed of the motor vehicle as a function of at least a desired distance to the detected object which is determined at least from the instantaneous driving speed and/or a prescribed desired speed. In order to improve the comfort performance of the speed control, the arrangement provides that, in the event of a loss of detection of the object by the distance sensor, the control unit determines the reason for the loss of detection of the object and forms the manipulated variables for setting the driving speed as a function of the reason for the loss of detection.
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Citations
22 Claims
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1. A motor vehicle speed control method comprising:
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detecting distances to an object in front of the motor vehicle by a distance sensor and supplying corresponding signals to a control unit; forming in the control unit, as a function of at least the instantaneous driving speed and a prescribed desired speed, manipulated variables for setting the driving speed of the motor vehicle as a function of a desired distance; and if the object is no longer detected by this distance sensor, determining the reason for the loss of detection of the object in the control unit and forming manipulated variable for setting the driving speed by the control unit as a function of the reason for the loss of detection of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A motor vehicle speed control arrangement comprising:
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a distance sensor for detecting distances from the motor vehicle to an object in front of the motor vehicle; a control unit for forming manipulated variables for the driving speed of the motor vehicle as a function of a desired distance to an object in front of the motor vehicle which is determined from at least the instantaneous driving speed, the distance to the detected object and a prescribed desired speed; means for supplying to the control unit the instantaneous driving speed and the distance to an object detected in front of the motor vehicle and; means for determining, in the event of loss of detection of the object by the distance sensor, the reason for the loss of detection of the object; wherein the control unit includes means for forming the manipulated variables for setting the driving speed as a function of the reason for the loss of detection of the object. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification