Vehicle speed control apparatus in accordance with curvature of vehicle trajectory
First Claim
Patent Images
1. A vehicle speed control system comprising:
- means for calculating instantaneous curvature; and
means for controlling a vehicle speed;
wherein,a vehicle is controlled to reduce the vehicle speed when the instantaneous curvature tends to increase and to enhance the vehicle speed when the instantaneous curvature tends to decrease;
the means for calculating instantaneous curvature includes means for instantaneously detecting a positional coordinate (x(t), y(t)) of the vehicle in a plane defined by at least two axes perpendicular to each other; and
the instantaneous curvature (κ
(t)) is calculated on the basis of the following expression;
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Abstract
In order to fit a driver'"'"'s driving feeling, a vehicle speed control system includes a unit that calculates the instantaneous curvature and a unit that controls vehicle speed. The system reduces the vehicle speed when the instantaneous curvature tends to increase, and enhances it when the instantaneous curvature tends to decrease.
20 Citations
9 Claims
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1. A vehicle speed control system comprising:
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means for calculating instantaneous curvature; and means for controlling a vehicle speed;
wherein,a vehicle is controlled to reduce the vehicle speed when the instantaneous curvature tends to increase and to enhance the vehicle speed when the instantaneous curvature tends to decrease; the means for calculating instantaneous curvature includes means for instantaneously detecting a positional coordinate (x(t), y(t)) of the vehicle in a plane defined by at least two axes perpendicular to each other; and the instantaneous curvature (κ
(t)) is calculated on the basis of the following expression; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification