What is the function of car cruise control?
2 Answers
Car cruise control, also known as speed control system or autonomous driving system, functions to automatically maintain the vehicle speed as set by the driver without the need to press the accelerator pedal, allowing the car to travel at a constant speed. With this device, drivers no longer need to manually control the speed during long-distance highway driving, reducing fatigue and unnecessary speed changes, which can save fuel. When the cruise control button is pressed, the car will maintain the set speed. Pressing the brake pedal immediately deactivates this function. In addition to using the brake pedal to cancel the function, there are also cancellation functions via the parking brake, clutch, and speed adjustment lever operation switch.
I've been driving long-haul trucks for over a decade, and cruise control has been a godsend for us long-distance drivers. Its biggest benefit is automatically maintaining your set speed without needing constant throttle input, significantly reducing right foot fatigue. The difference is especially noticeable on highways - where I used to get ankle pain after 4-5 hours, now I can drive all day comfortably. Beyond easing physical strain, it also saves fuel. Maintaining constant speed improves fuel efficiency - my own tests show 5%-10% fuel savings on identical routes. Of course, you must stay alert to road conditions when using cruise - be ready to take over when closing gaps or approaching curves, as safety always comes first. I recommend turning it off in bad weather when tire slippage becomes risky. Once mastered, this feature truly transforms long-haul driving into a comfortable experience.
