Recently, a small car on the Lanhai Expressway had a cruise control failure and the brakes failed (the model was said to be a Pentium B70). It ran 490 kilometers at a speed of 115 kilometers per hour until it ran out of fuel. The traffic police cleared the way and the road administration successfully rescued the car. As soon as the incident came out, the whole Internet was watching. The person involved, Mr. Ma, bluntly said in an interview that during the long four hours, he was highly nervous for four and a half hours. After running out of gas and getting off the car, he was shaking so much that he could not speak.
Similar things have happened before, which also triggered heated discussions among netizens. How should you resolve it if you encounter it?
A professional who has been engaged in the auto repair industry for more than ten years told reporters that the current cruise control function is usually designed with braking priority and can be released by applying the brakes. The person analyzed that the cruise control failure may be due to a brake priority failure. When the car owner stepped on the brakes, the brake switch did not establish communication with the ECU (electronic control unit), so the cruise mode could not be released.
According to the above-mentioned person, there are many reasons for brake priority failure. "Brake switch failure, throttle problem, or failure of certain components of the ABS anti-lock braking system may cause brake priority failure." The person also said that currently, car braking systems usually have redundant designs and backups.
A technical engineer from a car company also mentioned the above point of view. He said that the passenger car braking system has a multiple redundant structural design, and generally there will be no sudden loss of braking force. Therefore, the cause of the above-mentioned accident still needs to be investigated.
When there is a problem with the cruise control system, you can try to release the cruise state by the following methods: lightly or heavily depress the brake pedal, long press the parking button or P gear button, short press or long press the ignition switch.
At the same time, the person also reminded that when the brake assist disappears, the brake pedal may become harder, and the user will feel that the brakes cannot be pressed and the vehicle cannot decelerate as expected. In this case, there are several options that can be adopted:
1. Manually decelerate using the conventional braking system: You need to use the maximum force to decelerate the brake pedal. The correct posture is to pull the steering wheel with both hands, push back the seat, use the whole body's strength to decelerate (the brake pedal will not be stepped on), and use the steering system to reasonably plan the braking route to reduce the risk of collision.
2. Use the "emergency braking system" to decelerate using the handbrake/P gear: In addition to the conventional braking system, current car models usually also have an emergency braking system. The handbrake motor/booster and other devices can be used to generate braking force to slow down or stop the vehicle. In any case, long pressing the handbrake or P gear button can trigger emergency braking.
In addition, the traffic police also recommend that drivers should stay calm when encountering braking or cruise control failures. The first step is to turn on the double-bounce lights and long press the horn to alert surrounding vehicles. If cruise control fails, try pushing neutral, turning off the engine, applying the brakes, or pulling the handbrake.
If the response is ineffective, the driver should call the police immediately. In addition, during normal driving, drivers should increase their safety awareness and pay attention to cleaning the interior of the car to prevent external pollutants from infiltrating and affecting the normal use of automotive electronic components.
