Cruise control system, vehicle including the same, method of controlling the cruise control system
First Claim
1. A cruise control system, comprising:
- a road model transmission unit configured to analyze map information of a driving route and output a slope model of three consecutive forward sections;
a vehicle speed controller configured to set a control target vehicle speed using slopes of the three consecutive forward sections and section distances received from the road model transmission unit; and
a speed-following controller configured to receive a request for acceleration or deceleration and gear-shifting from the vehicle speed controller and maintain the set control target vehicle speed.
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Accused Products
Abstract
A cruise control system, the vehicle including the same, and the method of controlling the cruise control system are provided to improve fuel efficiency by changing control target vehicle speeds by continuously predicting vehicle speeds and variations in required driving forces on roads with various slope variations. Additionally, driving performance is improved by using kinetic energies and preventing unnecessary acceleration and deceleration in comparison with conventional vehicles. Driver convenience and satisfaction is also improved by preventing an unintended operation stop of the cruise control system caused by frequent acceleration and deceleration on roads with substantial slope variations in advance and by preventing unintended acceleration/deceleration on roads with frequent slope variations.
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Citations
20 Claims
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1. A cruise control system, comprising:
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a road model transmission unit configured to analyze map information of a driving route and output a slope model of three consecutive forward sections; a vehicle speed controller configured to set a control target vehicle speed using slopes of the three consecutive forward sections and section distances received from the road model transmission unit; and a speed-following controller configured to receive a request for acceleration or deceleration and gear-shifting from the vehicle speed controller and maintain the set control target vehicle speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A cruise control system, comprising:
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a road model transmission unit configured to calculate a linearly simplified road model using map information of a driving route and output a slope model of three consecutive forward sections (nth section, (n+1)th section, and (n+2)th section); a vehicle speed controller configured to calculate a slope variation (Δ
Slope_n+1, n ) between the nth section and the (n+1) section and a slope variation (Δ
Slope_n+2, n+1 ) between the (n+1)th section and the (n+2)th section using slope information regarding the three consecutive forward sections received from the road model transmission unit and to set control target vehicle speeds of the (n+1)th section and the (n+2)th section based on the calculated slope variations ((Δ
Slope_n+1, n ) and (Δ
Slope_n+2, n+1 )); anda speed-following controller configured to receive a request for acceleration or deceleration and gear-shifting from the vehicle speed controller and maintain the set control target vehicle speeds of the (n+1)th section and the (n+2)th section. - View Dependent Claims (15)
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16. A vehicle comprising a cruise control system, wherein the cruise control system comprises:
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a road model transmission unit configured to analyze map information of a driving route and output a slope model of three consecutive forward sections; a vehicle speed controller configured to set a control target vehicle speed using slopes of the three consecutive forward sections and section distances received from the road model transmission unit; and a speed-following controller configured to receive a request for acceleration or deceleration and gear-shifting from the vehicle speed controller and maintain the set control target vehicle speed.
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17. A method of controlling a cruise control system, comprising:
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outputting, by a controller, a slope model of three consecutive forward sections (nth section, (n+1)th section, and (n+2)th section) by calculating a linearly simplified road model using map information of a driving route; calculating, by the controller, a slope variation (Δ
Slope_n+1, n ) between the nth section and the (n+1) section and a slope variation (Δ
Slope_n+2, n+1 ) between the (n+1)th section and the (n+2)th section using slope information of the three consecutive forward sections;setting, by the controller, control target vehicle speeds of the (n+1)th section and the (n+2)th section based on the calculated slope variations ((Δ
Slope_n+1, n ) and (Δ
Slope_n+2, n+1 ));requesting, by the controller, acceleration or deceleration and gear-shifting by calculating acceleration/deceleration torques based on the set control target vehicle speeds of the (n+1)th section and the (n+2)th section; and outputting, by the controller, the acceleration torque or the deceleration torque and gear levels in response to receiving the request for acceleration or deceleration and gear-shifting. - View Dependent Claims (18, 19, 20)
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Specification