What is Electronic Power Steering?
Power steering simply makes the turning of your car easier, smoother and more accurate. Back in 1956, the steering wheel was a massive 20-inch diameter on some cars, in order to assist with the steering. This would have required much more effort than in today’s cars.
Realistically, unless you had a large amount of upper body strength, it would be difficult to drive a car without any power steering. Luckily for us, the majority of cars now have power steering, but which is the best type?
How Does Electronic Power Steering Work?
Electronic power steering combines different parts of a vehicle including the power steering pump, steering column, steering coupler, steering gear and the steering wheel. They all talk to each other to provide a smooth steering experience. A motorised system provides exact strength to the mechanism to assist the driver in steering, so you can use the least amount of effort in order to turn and steer a car.
What are the Different Types of Power Steering?
Electric Power Steering (EPS)
EPS is made up of an EPS control unit, EPS motor, reduction gear and torque sensor. EPS uses a pinion gear (smaller gear) to assist in providing power by rotating. Then the reduction gear is press fitted onto a set of splines on the pinion shaft, delivering assistance onto the rack gear. Electronic power steering uses the cars computer to run.
Hydraulic Power Steering (HPS)
Using hydraulic pressure supplied by an engine-driven pump, HPS is the oldest form of power steering and is probably the most outdated. HPS pushes on the rack gear as opposed to rotating gears. Hydraulic power steering uses the engine to operate.
Where is the Power Steering on an Engine?
The electronic power steering on a car is often found at the base of the steering column or on the steering rack. Frequently, electronic power steering is equipped with a small electric motor. The HPS differs from the EPS, as it uses the power of the engine. This makes the EPS more fuel economic.
Electronic vs Hydraulic Power Steering?
Hydraulic power steering uses hydraulic pressure supplied by an engine-driven pump which makes it harder to turn your car with more effort needed. Whereas electronic power steering makes it easier to turn the car with minimal effort.
EPS is also more fuel economic as the EPS uses the cars computer to run whereas the HPS uses the engine and therefore the petrol to operate. Making EPS a more active form of power steering.
If you are a classic car collector or simply looking to purchase an old car then the hydraulic power system may be present. Although the benefits of electronic power steering may outweigh the benefits of hydraulic power steering, do not fret if your car comes with hydraulic.
Pedders – Your Power Steering Specialists
Pedders offers a host of power steering parts right through to power steering service. Check out our range here. To find out more talk to your local Pedders outlet. Find a store near you today. For warning signs on power steering check out our brochure here.