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Manual Steering Racks
The mechanical steering racks follows the same principle as the power steering with the difference that the steering column is connected directly to the pinion acting on the rack.
The mechanical steering is currently used in cars that are equipped with the EPS system, since the electric steering column allows reducing the effort required to give direction to the wheels.
Manual Steering Racks New
Mechanical steering racks new is a fundamental mechanical part of the motor vehicle, the gears of the same itself are located in the engine compartment and transmit the movement to the front axle.
It is essential to have the steering box checked periodically during the 60,000 km service during which a total check-up is usually carried out on the car.
Steering columns (EPS)
The steering columns are safety devices that are installed on the vehicles to control the direction. Over the years we have built up considerable experience in this sector by producing some millions of steering columns, both fixed and adjustable in height and inclination.
The EPS has replaced the hydraulic power steering in small-medium sized cars and is becoming the most used solution on the cars of segment A, B, and C. It has the advantage of providing sufficient assistance for not too high loads and with some useful precautions to assist the driver come in the hydroguide.
Power Steering Racks
The power steering is essentially the same as the hydraulic power steering, but without the rack. The power steering is mounted only on certain types of vehicles, such as tractors, since, having a certain delay in response and being not very fast in steering, it is more suitable for slow vehicles. As a mechanical organ that controls the steering and consequently the entire car, it requires care and competence. Its revision is carried out with the utmost care, always replacing the terminals and bellows, grinding the stator and gaskets; it is then subjected to a strict and scrupulous testing, with bench test with hot and cold pressure cycles, using a high pressure pump that far exceeds the normal requirements of the vehicle. Everything that does not pass this procedure with full marks is discarded or demolished.
The hydraulic rack-and-pinion mechanical steering was followed by a new system called EPHS, or the mechanical hydraulic pump was replaced by an electronic power steering pump.
A pump is a hydraulic operating machine that uses moving mechanical parts (rotary or rectilinear alternative) to lift or in any case move or collect fluid material.
A pump operates in a closed environment, between a suction and a delivery duct. In dynamic pumps (operating tubomachines) the flow is continuous (stationary), while in volumetric pumps it is discontinuous (unsteady).
The device used to move liquids is normally intended for pumping, whereas the device intended for displacement of gaseous fluids is usually designated as a compressor.
Facar Italia covers your every need to keep your systems fully operational, with maximum efficiency and minimum maintenance costs. For greater practicality, gaskets, safety valves, flanges, brackets and adapters, easy to install and replace, can be purchased separately.
Our electronic systems assist monitoring and control, making them easier and more effective. Appropriate electric amplifiers convert low current signals into drive signals for pressure control units, solenoid valves or proportional ones. Regulators and monitoring units, such as speed, temperature and pressure sensors, help to close the control loop, to offer precise solutions.
Electric Steering Racks
The driver of a vehicle that steers, applies a couple of forces to the steering wheel, through the steering column, the energy exerted is transferred to the steering box which converts the rotary motion into a straight-line motion, then, the new movement generated is transferred to the wheels which can thus change direction.
Depending on the technology used to drive the steering box, we find different types of steering components: one of these is the Electric Guide Box. The steering movement from the steering wheel is transmitted from the box to the wheels with the contribution and support of an electric motor.
Drive shafts, also called semi-shaft, is a component that is part of the transmission or that set of mechanisms that, in a motor vehicle, allow the transmission of the energy developed by the engine to the wheels. In particular, the traction axis is divided into two axle shafts by the differential. In most vehicles the traction is on a single axle, mainly the front axle; the differential is inserted between them to avoid that in the curves, due to the difference in the length of the path that the two wheels must make, one of them slips; in this way an additional and opposite rotation for the two wheels is added to the common rotation imposed by the traction.
Cars with front-wheel drive, to allow the drive wheels to steer, are equipped with constant-velocity joints. When the suspensions are independent, the driveshafts are equipped with joints. Cars equipped with four drive wheels therefore have 4 drive shafts.
The gearmotor is a compact unit consisting of a reducer and an electric motor. The idea of a “motor-reducer block” is inspired by the patent of the German designer and entrepreneur Albert Obermoser, who in 1928 invented the so-called Vorlegemotor (geared motor).
Since then the basic model has been progressively improved and new models have been created. As far as the motor is concerned, the DC technology has lost importance, therefore today the gear reducers are generally associated with three-phase asynchronous motors or with permanent magnet synchronous servomotors.
The torque sensor is an electrical component positioned inside the electric steering box; its function is to detect the force that the driver applies and transmits to the steering column, to transform it into an electrical signal and transmit it to the steering box, which will consequently impart the right torque to the steering to assist the driver.
The torque sensor is essentially enclosed in a simple disc-shaped plastic casing, usually located under the steering column, near the headlight: it contains a series of tracks on which sliding contacts can work or, in the case of car upper an optical reader. The torque sensor records the speed and the length that the steering column performs under the action of the driver’s hands that rotate the steering wheel, and transmits them to the control unit that processes the information and decides how much electricity to send to the electric motor.
Steering Gear Stations
In the electric power steering a small electric motor, connected to the steering column and managed by a control unit, assists the steering action based on the information coming from a sensor (which measures the resistance that is opposite to the rotation). Electric power steering saves energy compared to the hydraulic solution both for the higher efficiency of the electric motor and for the possibility of being deactivated when not necessary (ie at high speeds).
A torque sensor mounted between the steering shaft and the pinion calculates the torque or force applied to the driver on the steering wheel during rotation thanks to elements that vary the electrical resistance. Subsequently it sends a voltage signal to the steering control unit which, after processing the input and taking into account the information provided by the other control units of the chassis system, sends a command to the electric motor that will assist the driver in the turning operation.
Electric-Hydraulic Pump Motors
The new EHP systems provide an economical and performing solution in the steering control of buses, coaches and trucks. The CE-marked variable speed EHP systems include a low voltage drive, an asynchronous motor and a T7 vane pump (other technologies available on request), all perfectly configured to optimize performance and eliminate the use of accessories for adaptation.
Unlike traditional systems, which rotate at fixed speeds with a PTO (power take-off) and a variable displacement pump housed in the engine compartment, the Parker EHP solution is inserted into the steering system and changes the speed of the fixed displacement pump based on instant needs.