Method for cruise control for a motor vehicle
First Claim
1. A cruise control method for controlling an actual speed of a motor vehicle to a set speed, a speed regulation interval being a range of actual speeds including the set speed during which the actual speed is controlled by speed regulation, the actual speed being controlled by acceleration regulation so long as the actual speed is outside the speed regulation interval, the method comprising the steps of:
- (1) when the actual speed (vact) transitions into the speed regulation interval such that control of the actual speed changes from acceleration regulation to speed regulation;
determining an actual value of a roadway gradient characteristic (adiff); and
(2) selecting a speed control parameter set as a function of the roadway gradient characteristic actual value, the speed control parameter set being selected from a plurality of speed control parameter sets which are predetermined differently for different possible roadway gradient characteristic values and are specific for the roadway gradient.
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Accused Products
Abstract
A method for cruise control in which actual speed is changed by acceleration regulation in the direction of a predetermined set speed, as long as it is outside a speed regulation interval, and the speed is regulated by speed regulation to the set speed as long as the sped is within the speed regulation interval, changes from acceleration regulation to speed regulation by using a determined roadway gradient characteristic in conjunction with a speed control parameter set matched to the roadway gradient.
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Citations
11 Claims
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1. A cruise control method for controlling an actual speed of a motor vehicle to a set speed, a speed regulation interval being a range of actual speeds including the set speed during which the actual speed is controlled by speed regulation, the actual speed being controlled by acceleration regulation so long as the actual speed is outside the speed regulation interval, the method comprising the steps of:
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(1) when the actual speed (vact) transitions into the speed regulation interval such that control of the actual speed changes from acceleration regulation to speed regulation;
determining an actual value of a roadway gradient characteristic (adiff); and
(2) selecting a speed control parameter set as a function of the roadway gradient characteristic actual value, the speed control parameter set being selected from a plurality of speed control parameter sets which are predetermined differently for different possible roadway gradient characteristic values and are specific for the roadway gradient. - View Dependent Claims (2, 3, 4)
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5. A cruise control method for controlling an actual speed of a motor vehicle to a set speed, a speed regulation interval being defined as a range of actual speeds that include the set speed, while the actual speed is within the speed regulation interval the actual speed is controlled by speed regulation, the method comprising the steps of:
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controlling the actual speed by acceleration regulation so long as the actual speed is outside the speed regulation interval;
when the actual speed (vact) transitions into the speed regulation interval, changing from acceleration regulation of the actual speed to speed regulation of the actual speed;
determining an actual value of a roadway gradient characteristic (adiff); and
selecting a speed control parameter set as a function of the roadway gradient characteristic actual value, the speed control parameter set being selected from a plurality of speed control parameter sets which are predetermined differently for different possible roadway gradient characteristic values. - View Dependent Claims (6, 7, 8)
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9. A cruise control method for controlling an actual speed of a motor vehicle to a set speed, the actual speed being controlled by acceleration regulation so long as the actual speed is outside a speed regulation interval, the speed regulation interval including a range of actual speeds that include the set speed, the method comprising the steps of:
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when the actual speed (vact) transitions into the speed regulation interval such that control of the actual speed changes from acceleration regulation to speed regulation, determining an actual value of a roadway gradient characteristic (adiff);
determining a gear in which the vehicle is operating; and
selecting a speed control parameter set as a function of the roadway gradient characteristic actual value and the gear, the speed control parameter set being selected from a plurality of speed control parameter sets which are predetermined differently for different possible roadway gradient characteristic values and vehicle gears. - View Dependent Claims (10, 11)
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Specification