What's the use of the car's power assist system?

The automobile power steering system can help the driver adjust the direction of the car and reduce the intensity of the driver driving the steering wheel. Power steering also plays a certain role in the safety and economy of automobiles.

The power steering system on the car can be divided into three categories:

1, mechanical type

The mechanical hydraulic power steering system consists of hydraulic pump, oil pipe, pressure and flow control valve body, V-belt, oil storage tank and other components. In order to maintain the pressure, the system is always in working state regardless of whether steering assistance is needed or not, and the energy consumption is high.

2, electro-hydraulic type

The steering oil pump of the electro-hydraulic power steering system is not directly driven by the engine, but driven by the motor, and an electronic control system is installed on the previous basis, so that the steering power is not only related to the steering angle, but also related to the vehicle speed.

3. Electric type

The electric power steering system uses the power generated by the motor to assist the driver in power steering, and consists of a torque (steering) sensor, an electronic control unit, a motor, a reducer, a mechanical steering gear and a battery power supply.

Extended data working principle

When the car turns, the torque sensor will "feel" the torque of the steering wheel and the direction to turn, and these signals will be sent to the electronic control unit through the data bus. The electronic control unit will send an action command to the motor controller according to the data signals such as the transmitted torque and the direction to be steered, so that the motor can output the corresponding rotating torque according to the specific needs, thus generating power-assisted steering.

If it doesn't turn, the system won't work, and it is in a standby state waiting to be called. Because of the working characteristics of electric power steering, you will feel that driving such a car has a better sense of direction and is more stable at high speed. As the saying goes, the direction does not drift. Because it doesn't work when it doesn't turn, it also saves energy to some extent. Generally, high-end cars use such power steering systems more.

Baidu Encyclopedia-Steering Assist

Baidu encyclopedia-steering wheel assist