Why does the steering wheel suddenly become lighter with no resistance feeling?

[Opal]

The sudden lightness and lack of resistance in the steering wheel are related to the power steering system. Currently, there are three types of power steering systems in vehicles: electric power steering, hydraulic power steering, and electro-hydraulic power steering. For vehicles equipped with hydraulic power steering, it is normal for the steering wheel to suddenly become lighter and lose its tactile feedback during acceleration. However, for vehicles with electric power steering or electro-hydraulic power steering, a sudden lightness and lack of tactile feedback in the steering wheel indicate a malfunction. The steering wheel is a wheel-shaped device used to control the direction of cars, ships, and airplanes. Its function is to convert the force applied by the driver on the edge of the steering wheel into torque, which is then transmitted to the steering shaft. It mainly consists of a frame, foam, and corresponding installation clips or screw holes for the driver's airbag (DAB).