Instead, a computer connected with various sensors and throttle controls operates the feature through a wireless system. This newer technology can automatically adjust the speed based on how fast the vehicle ahead is going while maintaining a safe distance. Drivers will find the system particularly useful on highways or roads with traffic jams during rush hour. Adaptive cruise control is an advanced version of the existing cruise control system. With the conventional system, the vehicle cruises at the speed previously set by the driver without the need to keep pressing the accelerator pedal.
On the other hand, the adaptive cruise control system does the same; however, it can also calculate the speed of the car ahead of you by using the data from radar sensors and automatically adjust the speed of your vehicle to keep a safe following distance between the vehicles. If the vehicle ahead slows down, the system detects the reduction of speed and operates the controls to decelerate your car.
If the car in front of you changes to another lane, the system gives the engine a signal to accelerate and reach the initially set speed.
Now let's add in the final factor, the derivative. Remember that the derivative of speed is acceleration. This factor helps the cruise control respond quickly to changes, such as hills.
If the car starts to slow down, the cruise control can see this acceleration slowing down and speeding up are both acceleration before the speed can actually change much, and respond by increasing the throttle position.
Two companies are developing a more advanced cruise control that can automatically adjust a car's speed to maintain a safe following distance. This new technology, called adaptive cruise control , uses forward-looking radar , installed behind the grill of a vehicle, to detect the speed and distance of the vehicle ahead of it. Adaptive cruise control is similar to conventional cruise control in that it maintains the vehicle's pre-set speed.
However, unlike conventional cruise control, this new system can automatically adjust speed in order to maintain a proper distance between vehicles in the same lane. This is achieved through a radar headway sensor , digital signal processor and longitudinal controller. If the lead vehicle slows down, or if another object is detected, the system sends a signal to the engine or braking system to decelerate.
Then, when the road is clear, the system will re-accelerate the vehicle back to the set speed. The GHz Autocruise radar system made by TRW has a forward-looking range of up to feet meters , and operates at vehicle speeds ranging from Delphi's GHz system can also detect objects as far away as feet, and operates at speeds as low as 20 mph 32 kph. Adaptive cruise control is just a preview of the technology being developed by both companies.
Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Under the Hood. How Cruise Control Systems Work. Cruise control is a feature you would love to have on your car! What Cruise Control Does " ". The on and off buttons don't actually do much. Hitting the on button does not do anything except tell the car that you might be hitting another button soon. The off button turns the cruise control off even if it is engaged.
Some cruise controls don't have these buttons; instead, they turn off when the driver hits the brakes, and turn on when the driver hits the set button. If you hit the set button at 45 mph, the car will maintain your speed at 45 mph. If you recently disengaged the cruise control by hitting the brake pedal, hitting the resume button will command the car to accelerate back to the most recent speed setting. Holding down the coast button will cause the car to decelerate, just as if you took your foot completely off the gas.
On this car, tapping the coast button once will cause the car to slow down by 1 mph. The brake pedal and clutch pedal each have a switch that disengages the cruise control as soon as the pedal is pressed, so you can shut off the cruise control with a light tap on the brake or clutch. The statements expressed above are only for informational purposes and should be independently verified.
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