53600-SWC-G04 Steering System Power Steering Rack for Honda CRV 53601-SWC-G02
In the existing market, power steering systems can be roughly divided into three categories: mechanical hydraulic power steering systems, electronic hydraulic power steering systems and electric power steering systems.
Mechanical hydraulic power steering system
The mechanical hydraulic power steering system is generally composed of hydraulic pump, oil pipe, pressure flow control valve body, V-type transmission belt, oil storage tank and other components.
This system works regardless of whether the car is steering or not, and when the steering speed is low, the hydraulic pump needs to output more power to obtain a larger help. Therefore, to a certain extent, resources are wasted. It can be recalled that driving such a car, especially when turning at low speed, I feel that the direction is relatively heavy, and the engine is relatively laborious. And because the pressure of the hydraulic pump is very large, it is also easier to damage the power system.
In addition, the mechanical hydraulic power steering system is composed of hydraulic pumps and pipelines and cylinders, in order to maintain pressure, regardless of whether the steering power is needed, the system always needs to be in a working state, which is a reason for the consumption of resources.
In general, economical cars use more mechanical hydraulic power systems.
Electronic hydraulic power steering system
Main components: oil storage tank, power steering control unit, electric pump, steering machine, power steering sensor, etc., of which power steering control unit and electric pump are an integral structure.
Working principle: The electronic hydraulic steering power system overcomes the shortcomings of the traditional hydraulic steering power system. The hydraulic pump used by it is no longer driven directly by the engine belt, but by an electric pump, and all its working states are calculated by the electronic control unit according to the vehicle's speed, steering Angle and other signals. Simply put, at low speed, the electronic control unit drives the electronic hydraulic pump to output high power at high speed, so that the driver can save effort in the direction; When the car is driving at high speed, the hydraulic control unit drives the electronic hydraulic pump to operate at a lower speed, which does not affect the need for high-speed steering while saving part of the engine power.
Electric Power Steering (EPS)
The full English name is Electronic Power Steering, or EPS, which uses the power generated by the electric motor to assist the driver in power steering. The composition of EPS, although different car structural components are not the same, but generally similar. It is generally composed of torque (steering) sensors, electronic control units, motors, retarders, mechanical steering devices and battery power supplies.
Main working principle: When the car is turning, the torque (steering) sensor will "feel" the torque of the steering disk and the direction of the intended rotation, these signals will be sent to the electronic control unit through the data bus, the electronic control unit will issue action instructions to the motor controller according to the transmission torque, the direction of the intended rotation and other data signals, so that the motor will output the corresponding size of the rotation torque according to the specific needs. This creates power steering. If it does not turn, the system does not work and is in standby(sleep) state waiting for the call. Due to 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, which is the saying that the direction is not floating. And because it doesn't work when it's not turning, it also saves energy to some extent. In general, high-end cars use such power steering systems more.
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