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Antilock Braking System

Adaptive Cruise Control

Adaptive cruise control (ACC) is an intelligent invention that either slows down or speeds up automatically to keep pace with the vehicle in front. The driver is responsible for setting a maximum speed and a radar sensor watches for traffic ahead where it will lock on to the car in front and stay 2 to 4 second behind. Cruise control also has the option to accelerate or decelerate the car by 1mph using a button. The ACC will disengage when the brake pedal is activated and wont engage at speeds lees than 40kmph. The cruise control is a small computer located under the hood or behind the dashboard. A good cruise control system will accelerate aggressively to the desired speed without overshooting and will maintain that speed with little deviation.

Adaptive cruise control is similar to conventional cruise control in the sense that it maintains the vehicles pre-set speed. However, this system can automatically adjust the speed to allow the vehicle to maintain a proper distance between the other cars in the same lane. This is accomplished through a radar headway sensor, digital signal processor and longitudinal controller. For example, if the vehicle ahead were to slow down, the system sends a signal to the engine or braking system to decelerate and once the road is clear, the system will again send a signal the vehicle will accelerate to the set speed.

 

Three main categories of ACC

  • Vehicles with Full Speed Range adaptive cruise control have the ability to bring the car to a stop of 0mph and are able to be re-activated to continue moving with the press of the gas pedal.

  • Vehicles with Traffic Jam Assist will automatically resume from standstill to creep with stop and go traffic.

  • Vehicles with Partial Cruise Control cuts off below a set minimum speed, which will require driver intervention.

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