Vehicle follow-up control system
First Claim
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1. A preceding vehicle follow-up control system for a vehicle, comprising:
- a vehicle-to-vehicle distance detector that detects a distance between a controlled vehicle and a preceding vehicle and outputs a signal indicative of the vehicle-to-vehicle distance;
a vehicle speed detector that detects a vehicle speed of the controlled vehicle and outputs a signal indicative of the vehicle speed; and
a controller connected to said vehicle-to-vehicle distance detector and said vehicle speed sensor, said controller comprising a vehicle-to-vehicle distance controlling section and a vehicle speed controlling section, the vehicle-to-vehicle distance controlling section calculating a target vehicle speed for bringing the vehicle-to-vehicle distance closer to a target vehicle-to-vehicle distance, on the basis of the vehicle-to-vehicle distance and the vehicle speed, the vehicle speed controlling section controlling driving force of the controlled vehicle at a target driving force so as to bring the controlled-vehicle speed closer to the target vehicle speed, the vehicle speed controlling section calculating a target acceleration for the target driving force on the basis of the target vehicle speed, and limiting the target acceleration according to the controlled-vehicle speed.
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Abstract
A preceding-vehicle follow-up control system is arranged to calculate a target vehicle speed based on a vehicle-to-vehicle distance and a controlled-vehicle speed, to calculate a target acceleration based on the target vehicle speed and to control driving force and braking force of the controlled vehicle based on the target acceleration. During this control period, the target acceleration is limited by an acceleration limit and a deceleration limit which are varied according the controlled-vehicle speed, respectively. This arrangement enables a follow-up vehicle speed control to be preferably executed without applying a strange feeling to a driver.
115 Citations
15 Claims
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1. A preceding vehicle follow-up control system for a vehicle, comprising:
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a vehicle-to-vehicle distance detector that detects a distance between a controlled vehicle and a preceding vehicle and outputs a signal indicative of the vehicle-to-vehicle distance;
a vehicle speed detector that detects a vehicle speed of the controlled vehicle and outputs a signal indicative of the vehicle speed; and
a controller connected to said vehicle-to-vehicle distance detector and said vehicle speed sensor, said controller comprising a vehicle-to-vehicle distance controlling section and a vehicle speed controlling section, the vehicle-to-vehicle distance controlling section calculating a target vehicle speed for bringing the vehicle-to-vehicle distance closer to a target vehicle-to-vehicle distance, on the basis of the vehicle-to-vehicle distance and the vehicle speed, the vehicle speed controlling section controlling driving force of the controlled vehicle at a target driving force so as to bring the controlled-vehicle speed closer to the target vehicle speed, the vehicle speed controlling section calculating a target acceleration for the target driving force on the basis of the target vehicle speed, and limiting the target acceleration according to the controlled-vehicle speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A preceding vehicle follow-up control system for a vehicle, comprising:
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vehicle-to-vehicle distance detecting means for detecting a distance between a controlled vehicle and a preceding vehicle;
controlled-vehicle speed detecting means for detecting a vehicle speed of the controller vehicle;
vehicle-to-vehicle distance controlling means for calculating a target vehicle speed for bringing the detected vehicle-to-vehicle distance closer to a target vehicle-to-vehicle distance on the basis of the vehicle-to-vehicle distance detected and the controlled-vehicle speed detected; and
controlled-vehicle speed controlling means for controlling the controlled-vehicle speed to bring the controlled-vehicle speed closer to the target vehicle speed;
wherein said controlled vehicle speed controlling means comprises target acceleration calculating means for calculating a target acceleration on the basis of the target vehicle speed and target acceleration limiting means for limiting the target acceleration on the basis of the controlled vehicle speed.
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14. A preceding vehicle follow-up control system for a vehicle, comprising:
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vehicle-to-vehicle distance detecting means for detecting a distance between a controlled vehicle and a preceding vehicle;
controlled-vehicle speed detecting means for detecting a vehicle speed of the controller vehicle;
vehicle-to-vehicle distance controlling means for calculating a target vehicle speed for bringing the detected vehicle-to-vehicle distance closer to a target vehicle-to-vehicle distance on the basis of the vehicle-to-vehicle distance detected and the controlled-vehicle speed detected; and
controlled-vehicle speed controlling means for controlling the controlled-vehicle speed to bring the controlled-vehicle speed closer to the target vehicle speed;
wherein said controlled-vehicle speed controlling means comprises preceding-vehicle catch detecting means for detecting whether the preceding vehicle is caught, target acceleration calculating means for calculating a target acceleration on the basis of the target vehicle speed, target acceleration limiting means for limiting the target acceleration on the basis of the controlled-vehicle speed when the preceding vehicle is caught, acceleration limiting means for setting the target acceleration at a predetermined limit when no preceding vehicle is caught and when the controlled vehicle is put in an accelerated condition, and acceleration limit increasing means for increasing the acceleration limit according to a demand of a driver of the controlled vehicle.
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15. A method of following-up a preceding vehicle, comprising:
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detecting a distance between a controlled vehicle and a preceding vehicle;
detecting a vehicle speed of the controller vehicle;
calculating a target vehicle speed for bringing the detected vehicle-to-vehicle distance closer to a target vehicle-to-vehicle distance on the basis of the vehicle-to-vehicle distance and the controlled-vehicle speed;
controlling the controlled-vehicle speed to bring the controlled-vehicle speed closer to the target vehicle speed;
calculating a target acceleration on the basis of the target vehicle speed; and
limiting the target acceleration on the basis of the controlled vehicle speed.
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Specification