The adaptive cruise control system is a new system that adds the function of keeping a reasonable distance between the vehicle in front and the cruise control system based on the set speed.
The adaptive cruise system is mainly composed of adaptive cruise control system sensor, adaptive cruise control system controller, engine management controller, electronic throttle actuator, brake actuator (e.gABS/ESPEtc.).[1]
working principle
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According to the information detected by the distance sensor, as well as the driving route information determined by the vehicle's speed sensor and yaw rate sensor, determine whether there is a vehicle driving in front of the vehicle in the same lane.The workshop distance sensor adopts microwave radar or range radar.
Adaptive cruise control system
When there is no vehicle in front of the same lane, drive at the set speed like the usual cruise control;When there is a vehicle in front, drive at a speed lower than the set speed to control the reasonable distance between the vehicle and the vehicle in front.Four typical functions:
(l) When there is no vehicle at the front, the ACC vehicle will be in the normal cruise driving state
When driving at the speed set by the driver, the driver only needs to control the direction (constant speed control)
(2) When the target vehicle appears in front of the ACC vehicle, if the speed of the target vehicle is less than that of the ACC vehicle
ACC vehicle will automatically start deceleration control to ensure that the distance between the two vehicles is the set safe distance
(3) When the distance between two vehicles is equal to the safe distance, follow control is adopted, that is to say, it is in phase with the target vehicle
Drive at the same speed.
(4) When the front target vehicle moves, or the main vehicle moves so that there is no moving vehicle in front of the main vehicle, the ACC system will accelerate the main vehicle to restore the main vehicle to the set driving speed.
characteristic
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Intelligent vehicles equipped with adaptive cruise control system use radar and computer to identify whether bicycles, cars or pedestrians are approaching the vehicle and control the driving state of the vehicle according to the road conditions, completely or partially replacing the driver's operation.
