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Steering Assistance Is To Assist The Driver In Car Direction Adjustment
Sep 06, 2018

The steering assist is to assist the driver in adjusting the direction of the car, and to reduce the strength of the steering wheel for the driver. Of course, the power steering also plays a certain role in the safety and economy of the car. The power steering system currently deployed on the car and the information I can see can be roughly divided into three categories:

First, mechanical hydraulic power steering system;

Second, the electro-hydraulic power steering system;

Third, electric power steering system.

Mechanical Hydraulic Power Steering System Mechanical hydraulic power steering system is generally composed of hydraulic pump, oil pipe, pressure flow control valve body, V-shaped transmission belt, oil storage tank and other components. This system works regardless of whether the car is turning or not, and when the high steering speed is low, the hydraulic pump needs to output more power to obtain a larger boost. Therefore, resources are also wasted to some extent. It can be recalled that when driving such a car, especially when turning at a low speed, the direction is relatively heavy and the engine is more laborious. Moreover, due to the high pressure of the hydraulic pump, it is also relatively easy to damage the power assist system. In addition, the mechanical hydraulic power steering system consists of a hydraulic pump and a pipeline and a cylinder. To maintain the pressure, the system must always be in working condition and high energy consumption, regardless of whether or not steering assistance is required. This is also a reason for the consumption of resources. Generally, economical cars use mechanical hydraulic power assist systems. Electro-hydraulic power steering system Main components: oil storage tank, power steering control unit, electric pump, steering gear, power steering sensor, etc., wherein the power steering control unit and electric pump are a whole structure.

Working principle: The electro-hydraulic steering assist system overcomes the shortcomings of the traditional hydraulic steering assist system. The hydraulic pump used is no longer driven directly by the engine belt, but an electric pump. All the working states are calculated by the electronic control unit according to the driving speed and steering angle of the vehicle. Simply put, at low speed and large steering, the electronic control unit drives the electronic hydraulic pump to output high power at high speed, which makes the driver save direction; when the car is driving at high speed, the hydraulic control unit drives the electronic hydraulic pump at a lower speed. Operation, while not affecting the need for high-speed steering, while saving part of the engine power.