What is the working principle of cruise control?

[Danielle]

Cruise control works by allowing the driver to maintain a constant speed without pressing the accelerator pedal once the cruise control button is activated, based on road conditions and driving needs. This effectively relieves the driver's right foot, especially during highway driving or long-distance trips, where cruise control serves as an excellent driving aid. Below are the precautions for using the cruise control system: 1. The transmission must be in a forward gear, the vehicle speed must exceed 40km/h, and the main cruise switch must be turned on. 2. If the vehicle speed drops below 40km/h or the actual speed decreases by more than 16km/h from the set speed, cruise control will automatically deactivate. 3. When the speed reaches 200km/h, the CCS (Cruise Control System) automatically limits acceleration. Even if the speed increase switch is operated, the speed cannot exceed 200km/h, as the CCS control unit has functions to limit both the minimum and maximum speeds. Speeds outside the range of 40~200km/h are not recognized.

[DeColton]

I particularly enjoy discussing car features, and the principle of cruise control seems quite fascinating to me. Imagine setting a fixed speed while driving, and the system acts like an invisible assistant controlling the throttle. The key lies in the vehicle's control system, which continuously monitors data from the speed sensor. If the speed drops below the set value, it subtly increases the throttle to accelerate back; if the speed is too high, it reduces the throttle to slow down. The entire process is managed electronically without needing to press the pedals, making it very convenient. This not only reduces fatigue on long drives but also helps maintain stable fuel consumption, avoiding unnecessary acceleration that wastes gas. Modern cars often integrate smart features, such as automatic adjustments on curves or slopes. In short, it makes driving smarter and more effortless, ideal for highway use. During actual testing, I found that even on roads with slight undulations, it maintains stability very well.

[McLeonardo]

In daily driving, I find cruise control to be a great help. Simply put, its principle is that the car automatically controls the throttle to maintain speed. When I set it to, say, 100 kilometers per hour, the vehicle's control system activates, using speed sensors to monitor in real-time. If the speed drops, such as when going uphill, it increases the throttle opening; if the speed is too high, like when going downhill, it reduces the throttle to slow the car down. This feedback mechanism works continuously, ensuring no need for my intervention. In use, I find it particularly effortless, especially on long trips. It also interacts with other vehicle systems, such as engine output adjustments, reducing mechanical stress. However, it's important to note that in heavy traffic or on snowy/rainy roads, it may be unstable, so I prefer to use it only in good road conditions. In the long run, it also benefits vehicle wear and tear due to fewer speed variations.

[JamesonLee]

I think the basic principle of cruise control is to maintain speed through electronic feedback. Once set, the system continuously monitors the vehicle speed signal—if it's below the set value, it accelerates; if above, it eases off the throttle to maintain consistency. This automated process significantly eases driving. Additionally, it reduces fatigue and helps maintain fuel-efficient speeds. Operation is simple—just press a button.