VEHICLE SPEED CONTROL SYSTEM AND VEHICLE SPEED CONTROL METHOD OF VEHICLE
First Claim
1. A vehicle speed control system which is installed a vehicle which has a vehicle speed detector, comprising:
- a controller that performs vehicle speed limit control that limits a vehicle speed so that the vehicle speed detected by the vehicle speed detector does not exceed a speed limit, and speed increase rate control that allows increase of the speed of the vehicle after the vehicle speed limit control is finished while limiting a rate of increase of the speed of the vehicle so that the rate of increase of the vehicle speed does not exceed a target rate of increase of the vehicle speed, whereinthe controller sets the target rate of increase of the vehicle speed based on the vehicle speed detected by the vehicle speed detector, so that the target rate of increase of the vehicle speed becomes a larger value when the vehicle speed is high, than that obtained when the vehicle speed is low.
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Accused Products
Abstract
If a condition for finishing speed limit control is satisfied, a gradient of a slope of the road is estimated based on a steady component of the longitudinal acceleration of the vehicle, and a correction factor is computed based on the slope gradient of the road, while a target acceleration of the vehicle is computed based on the vehicle speed. Then, a target vehicle speed is computed by adding the target vehicle speed of the last cycle to the product of the correction factor, target acceleration and the cycle time of the control, and the braking or driving force of each wheel is controlled so that the vehicle speed becomes equal to the target vehicle speed. In this manner, a passenger of the vehicle is prevented from feeling uncomfortable about the speed increase after the completion of the vehicle speed limit control.
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Citations
16 Claims
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1. A vehicle speed control system which is installed a vehicle which has a vehicle speed detector, comprising:
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a controller that performs vehicle speed limit control that limits a vehicle speed so that the vehicle speed detected by the vehicle speed detector does not exceed a speed limit, and speed increase rate control that allows increase of the speed of the vehicle after the vehicle speed limit control is finished while limiting a rate of increase of the speed of the vehicle so that the rate of increase of the vehicle speed does not exceed a target rate of increase of the vehicle speed, wherein the controller sets the target rate of increase of the vehicle speed based on the vehicle speed detected by the vehicle speed detector, so that the target rate of increase of the vehicle speed becomes a larger value when the vehicle speed is high, than that obtained when the vehicle speed is low. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A vehicle speed control method of a vehicle, comprising:
detecting a vehicle speed; limiting the vehicle speed so that the vehicle speed does not exceed a speed limit; and allowing increase of the speed of the vehicle after the vehicle speed limit control is finished while limiting a rate of increase of the speed of the vehicle so that the rate of increase of the vehicle speed does not exceed a target rate of increase of the vehicle speed, wherein the target rate of increase of the vehicle speed is set based on the detected vehicle speed, such that the target rate of increase of the vehicle speed becomes a larger value when the vehicle speed is high, than that obtained when the vehicle speed is low. - View Dependent Claims (15, 16)
Specification