Power steering units - devices that are used to reduce the transmission ratio of the steering mechanism.They facilitate the work of the hands of the driver when parking and turning.Due to hydraulic power steering of the car it becomes so easy that it is possible to turn using only one finger.And today we will devote a separate article to this mechanism to learn its structure and operation.
What can they do?
power steering control not only reduce the force applied by the driver to turn the steering wheel, but also absorb all the shocks that are transferred from the tires to the entire running gear when driving over uneven.This significantly reduces the load on all other details of the suspension.
Interesting fact - vehicles equipped with power steering, is not entered in the ditch at the sudden descent on the wheel speed.At the same time the car without power steering becomes unmanageable if the drive axle tire is down sharply.Thus, the power steering system provides you with additional safety when driving.
How is this mechanism?
Power steering units are composed of the following mechanisms:
- steering, which is combined with the hydraulic cylinder and the control spool assembly;
- pump with a fluid reservoir;
- connecting lines of high and low pressure.
The principle of
If the vehicle moves in a straight path, power steering systems are in working order.They are activated only after a certain rotation of the wheel.If the vehicle is going straight, the fluid in the system is circulated in a circle, that is, from sediments falls back into the tank.
only after the driver has carried out the steering wheel hydraulic power begins to operate.At the same moment occurs twist torsion, whereby the spool is rotated relative to the distributor sleeve.The liquid after the opening of the channel enters into one of the holes of the power cylinder.What exactly that will be the cavity depends on the direction of rotation.At the same time from the other holes liquid is discharged into the tank.Thus the cylinder piston moves the steering rack.Last part sends efforts on the tie rod, and then rotates the wheel.
If hydraulic power is engaged in the parking lot or at a turn in a confined space, that is, when the vehicle speed is small, it operates with the greatest efficiency.Power depends on the efforts of the pump motor.It receives a signal from the computer, thereby the system opens the solenoid valve.Accordingly, with an increase in fluid pressure creates more force on the turn of the wheel.Therefore, the driver almost never make an extra effort to twist the steering wheel.
How much is the power steering?The price of the device is about 20-25 thousand.
