Why is my car speed limiting itself?
2 Answers
The function of electronic speed limiting is to prevent excessive speed and avoid accidents caused by high speed. The electronic speed limiter can monitor the vehicle's speed in real time. When the speed reaches a certain value, it will control the fuel supply system and engine speed. At this time, even if the accelerator pedal is pressed, the fuel supply system will not provide fuel. Here are some precautions for driving on highways: 1. Drive in the designated lane: Highways have clearly marked lanes, including dedicated lanes for large and small vehicles. When overtaking, return to your own lane promptly after completing the maneuver and avoid occupying other lanes for extended periods. Additionally, the emergency lane should not be occupied for non-emergency reasons. 2. Maintain a safe speed and avoid speeding: The dangers of speeding are well-known, leading to irreversible consequences whether on local roads or highways. 3. Maintain a safe following distance: Under normal conditions with dry pavement and good braking, the following distance (in meters) should not be less than the speed (in km/h). For example, at 80 km/h, maintain at least 80 meters, and at 100 km/h, maintain at least 100 meters. Always pay attention to roadside distance markers. In rainy, foggy, snowy, or wet road conditions, the following distance should be doubled. 4. Observe traffic signs: Always be aware of roadside and overhead signs and markings, and stay slightly to the right to avoid driving on the right lane divider, providing enough lateral space for overtaking vehicles. 5. Do not arbitrarily occupy the emergency lane in case of accidents: Traffic incidents are inevitable on highways. If other vehicles cause an accident blocking the lane, do not occupy the emergency lane, as this may hinder rescue operations. 6. Avoid fatigue driving and take timely breaks: Fatigue driving is extremely dangerous on highways. When fatigued, reaction times decrease, making it difficult to respond correctly to sudden situations.
Once when I was overtaking on the highway in my brand-new car, I suddenly felt like the car couldn't accelerate properly, as if someone had pressed a speed limiter button. At first I thought I might have accidentally activated cruise control, but after checking the manual, I realized it was a minor issue with the engine control unit - probably caused by misread sensor signals triggering speed limitation. The electronic systems in modern cars are just too complex nowadays. Those ADAS driver assistance systems in particular tend to play tricks like this when malfunctioning. This incident reminded me that I should regularly update the software and not skimp on maintenance costs, because highway breakdowns can be extremely dangerous. In the end, I had the ECU reprogrammed at the dealership, which cost me a few hundred yuan, and the problem was solved.
