What is ACC Adaptive Cruise Control?
4 Answers
Adaptive Cruise Control (ACC), also known as Active Cruise Control, is an intelligent automatic control system. Here is a detailed introduction to the automotive adaptive cruise control system: 1. Overview: The adaptive cruise control system replaces the driver in controlling the vehicle speed, avoiding frequent cancellation and setting of cruise control, making the cruise system suitable for more road conditions. The driver can completely remove their foot from the pedal, only needing to focus on the steering wheel. 2. Others: The adaptive cruise control system can significantly reduce the fatigue caused by long-distance driving, providing drivers with a more relaxed driving experience. Through system software upgrades, the adaptive cruise control system can achieve a "Stop/Start" function.
ACC adaptive cruise control is a magical tool that allows the car to control its speed while driving. I often use this feature on the highway. After setting the maximum speed and following distance, the radar scans the position of the vehicle ahead in real time. If the car in front slows down, my car can automatically brake to maintain a safe distance; when the car ahead accelerates, it can return to the set speed. It’s especially convenient for long-distance driving—no need to keep your foot on the accelerator, just hold the steering wheel and relax. However, remember to take manual control in complex road conditions, such as sharp curves or sudden lane changes. This system is now available in most mid-to-high-end cars and is smarter and safer compared to traditional cruise control.
ACC (Adaptive Cruise Control) essentially adds environmental perception capabilities to traditional cruise control. When I activate it while driving, the vehicle's millimeter-wave radar or camera continuously monitors the vehicle ahead. The system automatically calculates relative speed and distance, then controls the engine and braking system via electrical signals. The following distance can be adjusted across multiple levels - I typically set it longer during rainy conditions. Through usage, I've noticed its braking and acceleration are very linear, avoiding any abrupt movements that might startle passengers. While the technical principles sound sophisticated, operation simply involves pressing a button on the steering wheel. Such systems have achieved high maturity in brands like Volvo and Toyota, where the automatic following feature during traffic jams significantly enhances the driving experience.
The core of adaptive cruise control is the automatic follow function. I rely on it every day for my commute on the expressway. After setting the upper limit at 80km/h, the system automatically matches the speed of the vehicle ahead. The most practical aspect is eliminating the fatigue of repeatedly pressing the accelerator, especially during long-distance driving. When the car ahead suddenly brakes, the radar can respond and initiate braking within 0.5 seconds, much faster than human reaction. In actual use, it's important to note that the system relies on clear lane markings, and its effectiveness may decrease in heavy rain or fog. Nowadays, this feature is commonly equipped in domestic cars priced around 100,000 yuan, truly changing driving habits.
