What do res and set mean in a car?

[AdelynLee]

In a car, 'res' stands for reset or return to zero, while 'set' means setting. The former is used to accelerate after setting the cruise control, and the latter is used to temporarily cancel the cruise control. The working principle of cruise control is: the cruise control component reads the pulse signal from the speed sensor and compares it with the set speed, then issues commands to the servo mechanism to adjust the throttle opening to increase or decrease, ensuring the vehicle maintains the set speed. The method to use cruise control is: 1. Press the cruise control button; 2. After activation, when reaching the desired speed, press the 'set' button; 3. To reduce the cruise speed, press the 'set minus' button; 4. To increase the cruise speed, press 'res'; 5. To temporarily turn off the cruise control system, step on the brake pedal or press the button.