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What does 'set' mean in a car?

2 Answers

DelOlive

07/24/25 1:31am

SET stands for the speed setting switch. Here are the specific details about SET: 1. SET is the cruise speed control indicator. When setting the cruise speed, accelerate the car to the desired speed and press the [SET] button. Typically, the car speed needs to be greater than 30 miles per hour (approximately 48 kilometers per hour). 2. When using cruise speed control, if you press the brake, the cruise speed control will stop working. Below are the specific details about cruise control: 1. The cruise control system mainly consists of a command switch, sensors, ECU, and actuators. 2. The ECU has two input signals: one is the command speed signal set by the driver as required, and the other is the feedback signal of the actual driving speed. 3. After detecting the error between these two input signals, the controller generates a throttle control signal sent to the throttle actuator, which then adjusts the engine throttle opening according to the throttle control signal to correct the error detected by the electronic control device, thereby maintaining a constant speed.

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McLeonardo

08/10/25 9:12pm

The 'set' button in a car usually refers to the speed setting function in the cruise control system. After driving for so many years, I often use it on highways. With just a press of the button, the current speed is locked, and the car automatically maintains that speed, eliminating the need to keep pressing the accelerator and preventing foot fatigue. It's especially useful for long trips—not only does it save fuel, but it also makes the ride more comfortable, allowing you to focus on the road. After setting the speed, you can make fine adjustments, such as increasing or decreasing the speed using the '+' or '-' buttons. Safety-wise, it's important to note that pressing the brake will cancel the function in case of emergencies. Always ensure the road is clear before setting the speed and avoid using it on busy streets. This feature is quite common in modern cars, but remember to activate the main cruise control switch before pressing 'set' for it to take effect.

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