Steering assist is to assist the driver to adjust the direction of the car for the driver to reduce the intensity of steering the steering wheel, of course, power steering in the car driving safety, economy is also a certain role. On the current configuration of the car power steering system and I can see the information can be divided into three categories: First, the mechanical hydraulic power steering system; second, electronic 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, tubing, pressure flow control valve body, V-drive belts, storage tanks and other components. This system works regardless of whether the car is steered or not, and requires a hydraulic pump to deliver more power for greater assist when steering at low speeds. So, to a certain extent, wasted resources. Can recall: open such a car, especially when turning at a slow speed, think the direction is relatively heavy, the engine is also more laborious. And because of the pressure of the hydraulic pump, it is relatively easy to damage the power system. In addition, the mechanical hydraulic power steering system consists of a hydraulic pump, a pipeline and a fuel tank. In order to maintain the pressure, the system always needs to be in a working state with high energy consumption for maintaining the pressure, which is also a reason for consuming resources. General economy car using mechanical hydraulic booster system more. Electronic hydraulic power steering system main components: oil tank, power steering control unit, electric pump, steering gear, power steering sensors, etc., of which power steering control unit and electric pump is a whole structure. How it works: Electro-hydraulic steering assist system to overcome the shortcomings of the traditional hydraulic power steering system. Instead of driving directly on the engine belt, the hydraulic pump is powered by an electric pump. All its working conditions are optimally calculated by the electronic control unit based on signals such as vehicle speed and steering angle. To put it simply, at low speed and large steering, the electronic control unit drives the electronic hydraulic pump to output high power at a high speed so as to reduce the effort of the driver. In high speed operation, the hydraulic control unit drives the electronic hydraulic pump at a lower speed Running, will not affect the need for high-speed steering at the same time, saving some of the engine power. Electric power steering system (EPS) English name is Electronic Power Steering, referred to as EPS, which uses the power generated by the motor to assist motorists to power steering. EPS composition, different cars Although the structural components are not the same, but generally the same. Generally by the torque (steering) sensor, electronic control unit, motor, reducer, mechanical steering, and livestock battery power posed. The main principle of operation: When the vehicle is turning, the torque sensor will "feel" the steering wheel torque and the direction to be rotated. These signals will be sent to the electronic control unit through the data bus. The electronic control unit will control the transmission torque, The direction to be transferred and other data signals to the motor controller issued an action command, so that the motor will be based on the specific needs of the corresponding output torque torque, resulting in power steering. If you do not turn, then the system does not work in standby (sleep) wait for the call. Due to the electric and electric power steering work characteristics, you will feel like driving a car, a better sense of direction, more stable at high speed, as the saying goes the direction of floating. And because it does not work when it does not turn, so how much does it save energy? General high-grade cars to use such a power steering system more.
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