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1 electric power steering system EPS
EPS is an abbreviation of the English Electric Power Steering, i.e. ldquo; electric power steering system ldquo ;, which typically adds to the torque sensor, a vehicle speed sensor consists of a mechanical steering the electronic control unit, reduction gear, a motor and other components. It is based on the traditional mechanical steering system, in accordance with the vehicle speed signal and torque signal on the steering wheel of the automobile, electronic control means causes the motor to generate assisting power corresponding to the magnitude and direction, assist the driver in steering operation.
Specifically, the means, when the driver performs steering, the steering torque sensor detects a steering torque and the magnitude of the voltage signal is conveyed to the electronic control unit in the steering wheel, the electronic control unit in accordance with rotation the torque sensor detects the torque voltage signal, a vehicle speed and direction of rotation signals, commands sent to the motor controller, the motor output torque corresponding steering direction and magnitude, to produce auxiliary power. When the vehicle is not turning, the electronic control unit does not issue an instruction to the motor controller, the motor does not operate.
It has the following advantages:
energy saving
As the engine running, the pump is always active, so that the whole hydraulic steering system engine fuel consumption increased by 3% to 5%, while the EPS battery as energy to the motor-driven element, can work independently of the engine, the engine directly EPS consumes little fuel. EPS there is no fuel leak hydraulic power steering system, EPS through electronic control, almost no pollution to the environment, but also reduces fuel consumption.
to facilitate mounting
The main components of the EPS can be equipped with integrated, easy to arrange, as compared with the hydraulic power steering system reducing the number of components, the hydraulic system is not required pumps, tubing, pressure and flow control valves, storage tanks and the like, the number of elementsSmall head, easy assembly, saving time.
High Efficiency
The hydraulic power steering system efficiency is usually 60 to 70 percentage percentage, and the higher the efficiency of the EPS, up to 90%.
Good sense passage
Pure conventional hydraulic power steering mostly fixed magnification, a large driving force is working, but can not be achieved in a variety of automobile driving vehicle speed the easiness and road feel. The hysteresis characteristics of the EPS system can be compensated for by EPS controller software, making the car at all speeds can be satisfied with power steering.
aligning good
EPS system simple structure, easy operation only, also can be adjusted EPS controller software, optimum aligning, thereby improve handling stability and comfort of the car.