What Causes the Steering Wheel to Become Lighter?
2 Answers
The reason the steering wheel becomes lighter is due to a malfunction in the computer controlling the electronic power assist. Below is supplementary information about the electronic power steering system: 1. Structure: This system mainly consists of components such as a torque sensor, vehicle speed sensor, motor, reduction mechanism, and electronic control unit. 2. Working Principle: When the steering wheel is turned, the torque sensor detects the direction and magnitude of the steering torque. The electronic control unit then uses data like vehicle speed and turning direction to control the motor to output the corresponding magnitude and direction of assist. Since the motor does not operate when the vehicle is not turning, this significantly reduces energy consumption. 3. Advantages: Because the electric power steering system is electrically driven, it can operate independently of the engine, reducing the engine's fuel consumption while providing better handling and comfort.
Having driven for over a decade, I've noticed that when the steering wheel becomes lighter, it often indicates an issue with the power steering system. For instance, insufficient or leaking hydraulic power steering fluid can reduce assistance, making the steering feel lighter but unstable. Tire problems, such as low pressure, can decrease the tire's grip, resulting in a lighter steering sensation. Loose ball joints in the suspension system or faulty shock absorbers can also reduce steering resistance. In vehicles with electronic power steering, a malfunctioning sensor might cause abnormal increases in power assistance. Once the steering wheel feels lighter, don't underestimate it—this can easily lead to loss of control during high-speed turns. I recommend immediately stopping to check tire pressure. If that's normal, promptly visit a professional shop to inspect the steering system to ensure driving safety.
