The electric direction booster English stands for Electronic Power Steering, EPS, late 1990s began to gradually applied to the production car steering technology, with the hydraulic power system is still based on the rack and pinion steering mechanism from just help agencies by complex hydraulic mechanism into a system rely on motor generates boost.
Very simple structure of the electric power steering system, hydraulic pump, reservoir, hydraulic lines and steering column body structure, but by the sensors, control unit and the booster motor constitute. Torque sensor is installed in the steering column position, when the steering wheel is rotated, the torque sensor detects the rotational torque, and converting it into an electrical signal to the controller, the speed sensor signal to the controller, the controller operation is enough supplied the appropriate voltage of the motor, the drive motor rotation, and the motor through the reduction mechanism of the torque enlarged push steering column or a steering rod movement, and to achieve booster. If you do not turn, the system will not work in a dormant state waiting for the call. Under the speed-variable power-assisted steering wheel feature allows more light at low speeds, and is more stable at high speed, the saying goes, direction flighty. Not work because it does not turn, but also the number of degrees to save energy, generally high-end cars use this power steering system more.
Electric direction of the power steering system is generally determined by the torque (turning) sensor, electronic control unit, motor, speed reducer, mechanical steering gear, as well as livestock battery power.
There are two main electric power steering system type: electric power steering according to the acting position of different structures. These two structures are the boost is applied on the steering shaft and the steering rod. The electric power steering shaft applied booster structure is the assisting motor (with a speed reduction mechanism, and magnifies the torque acts) directly connected in the steering shaft, the motor output of the assist torque is applied directly on the steering shaft, equivalent to the direct assistance of the motor we turn the steering wheel.
Another structure is the booster motor is arranged on the steering rod (also divided into a gear-assisted rack assist), the direct use of booster motor (the with deceleration institutions magnifies torque) to promote the trolley to help wheel steering, this more compact structure, ease of arrangement, currently more widely used. This structure relative to the first structure, the steering parts Motor Assist is relatively independent of the road can be a very good feedback through the tires, rack-and-pinion mechanism to the steering wheel at the structure with clearer "road feel" better balance between driving pleasure.
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