Power steering fluid along with power steering system is designed to reduce the effort needed to change the direction of movement of a vehicle using an external power source. Official first servo-related license appeared in 1932 in the United States belonging to Francis W. Davis.
Power source which is itself the vehicle engine through a belt train pump that is designed to pump fluid under pressure in hydraulic cylinders that control steering wheel.
Force F must be large enough to overcome external resistances, caused by friction between the tire and the tread, which are directly influenced by friction at the axle load that the type tire tread condition.
Considering these factors, hydraulic cylinders and pressure are chosen to be required to give the pump.
Power steering system main elements :
– hydraulic rotary distributor
– pump to act power steering fluid
– the tank of power steering system
– hydraulic cylinder
– power steering fluid
– pressure relief valve
Power steering fluid – how to check
Checking power steering fluid on most cars is easy, although not all cars have this system: if you park alongside a handful and eat ice cream with the other hand, you have power steering.
Steps to check power steering fluid
Find lever hood, usually located under the dashboard. Pull it.
Go in front of the car. Find locked. It is usually located in front bonnet. Click it. As you press, lift and open the hood.
Locate the belts. Power steering pump is driven by a wheel and a belt and has a transparent plastic container or metal (usually round) above. Power steering cap will often branded “power steering”.
Check the fluid level by looking to one side of the tank (if clear plastic) or turning them cover (if metal). Some tanks have a small rod of capacity. Normally, you can choose between hot or cold fluid check and there will be suitable for hot and cold levels.
Put the power steering fluid if necessary. Use only the type of power steering fluid under your car consult the car manual and glass of liquid. Some cars require power steering fluid specifically designed for that type of car.
Tips about power steering system
Check power steering fluid level and belt if you hear a squeak when turning the steering wheel completely.
If the direction is stiff, take the car to a mechanic.
Remember that although deviations or vibrations can signal problems with the power steering system, these symptoms may also be related to car tires, suspension, brakes and other problems.
Power steering fluid does not “consume” – outside of a leak, there is no reason that the liquid level to be low. Fill tank to the right level and check frequently to see if you can find at a lower level. If you continue, then check for leaks and go to the mechanic. An empty power steering pump may be damaged very quickly and cost a lot to be repaired.
How it works power steering fluid along with power steering system
The driver maintain steering wheel in an upright position, the distributor provides the same pressure in each hydraulic cylinder chamber.
When the wheel is rotated hydraulic circuit will take some more pressure. When entering the pressure difference increases the expression of force F and the wheels will brace. Pressure in the circuit is made by a pump. The most common pumps used in the servo are sliding vane and oval room
The amount of power steering fluid put in motion is proportional to pump speed and consequently the engine speed. The pump should be made ??but such as to give adequate flow when the engine running at idle.
Therefore, the high speed modes, the pump gives a much higher rate than necessary power steering fluid. This is because the phenomenon of “Lack of feel” or “lack of sensation.”
The pump is equipped with a pressure relief valve to ensure that pressure does not increase very much when the engine speed increases and increasingly more power steering fluid is circulated through the pump and entire power steering system.
Operating the power steering system when the fluid is low can damage the power steering pump. Make sure to keep the fluid to its recommended level when fluid is leaking and the system is damaged. A power steering fluid leak most frequently happens at hose couplings, the power steering pump, or to old gaskets. There are a couple of methods you can stop a power steering fluid leak at home, but important issues must be eventually left to a auto mechanic.
Power Steering fluid Leak – step by step instructions to stop the leak
1. Find the source of the leak. Sometimes must be difficult when you have a power steering fluid leak but you can use a mirror on an expanded handle to observe the mess of fluid on your garage floor or to your parking space. Search on the hoses and gaskets to discover from exactly where the fluid could be leaking.
2. After you see where the problem comes, for power steering fluid leak best way to stop the leak is to add a power steering stop leak additive to your power steering fluid. Lucas Power Steering Stop Additive is guaranteed to stop all seal leaks and every authorized car service use it. You have a link bellow where you can order it. In older cars, the seals shrink, causing leaks. The stop leak makes the seals get bigger to their initial size.
3. Use gasket sealant if the gaskets are old and leaking. Sealant, such as Permatex, is resistant to engine fluids, temperature, vibrations and will help you to fix a leaking gasket. Aslo I gave you a link bellow to help you a little bit. If you even now see leaks coming from a gasket after applying the Permatex following directions on the package, then remove the old gasket, and put on a new one. You can buy the correct size gasket from the vehicle’s stores.
4. If you see a leak in the hose then replace the power steering pressure hose. Often a power steering fluid leak coming from the hose. Spray oil on the end fittings of the pressure hose to loosen them. Remove the bolts attaching the hose to the power steering system with a flare nut wrench. Put a pan under the hose before removing it, as fluid will drain out. Change with a new hose from your and tighten up the hose the exact same way with the flare nut wrench. There is less risk of stripping the bolt when you use a flare nut wrench. Put more power steering fluid to substitute the fluid that drained out.
Electric power steering
An increasing number of cars are now being equipped with completely electric power steering. In these systems, hoses, pumps and tanks are dispensed with – instead, an electric powerplant attached to the steering column that does all the work. The benefits to the producer include lower maintenance and construction costs, and to the customer, less chances of failure through power steering fluid leak. The fuel consumption is also improved with electric power steering system. But there can be another benefits to the modifier, one which so far has been entirely forgotten. Because it’s an electronically-controlled system, it’s simple to modify the features of electric power steering to suit personal choices. Particularly, you can alter the steering weight to substantially increase steering feel and high speed stability.
Electric power steering – Components
It’s now over three years considering that we included the basics of electric power steering but what do most electric power steering systems look like in these days? Well, some are less complicated than covered in that story.
Usually, an electric power steering system is composed from:
– a powerful electric motor designed to the steering shaft
– torque sensor(s) that recognize how much energy is being put into the steering
– an electric power steering Electronic Control Unit (ECU)
– a road speed feedback to the ECU
Electric power steering – how it works?
It’s essential to understand that this measured torque is a two-way process – if the front wheels are on wet grass they’ll turn very easily, so even with the driver turning the steering wheel hard, not much torque will need to be used to alter the steering angle of the tyres. However, if the front tyres are on coarse bitumen, they will resist turning and so the amount of torque needing to be applied by the driver will be much better to get the tyres to turn.
In other terms, the torque sensor shows both the driver’s input of torque and the torque response of the tyres. The result is less power assist and so greater road feel thanks to electric power steering.