FORD'S SCORPIO

1985-1994 of launch

Repair and operation of the car

Action beginning

Efficiency of braking the biggest, when the union of the tire with the surface of the maximum of way. In the course of the frenagem of the slip of tire in a surface and the speed of district of a wheel is made less than the speed of the car.

There makes sliding minimum (0 %) when the wheel slips freely, and maximum (100 %) when the wheel is blockaded. The very efficiency of the frenagem is got when the escorregamento does 15 %. This size also allows to guard the stability and controllability of the car.

The paper of antiblockading the system is composed in the restriction of the pressure created in the hydraulic system of brakes so that the size of slipping guarded on the best size (15 %). The action of this system will be immediate and to be separated for each wheel. The system will answer immediately each modification of a surface (coefficient of union) and the load of the car.

Drawing

The antiblockade of system (ABS) Teves contains four sensors of the speed of rotation of wheels, hydraulic knot of the management and the device of electronic actuation.

Four sensors (in each wheel of the car) transmit the signs that inform in the speed of the rotation of each wheel of the car to the device of electronic actuation.

The device of electronic actuation located in the right side below the list advanced on basis of the information obtained on the unequal speed of the rotation of separate wheels (or on his zablokirovaniye) transfers in the hydraulic knot of the team of control of reduction of the force of braking (pressure given to a support of brake) of a wheel that began to try the excessive escorregamento. The device of electronic actuation also executes the function of autodiagnosis, warning the driver's fire of a bulb of control on the register of the bad functioning of electric chains or elements of antiblockading the system. In the system defective ABS of a brake however they are useful and they work how if this system is not in the car. The only control bulb warns the driver that the system ABS does not correct his mistakes.

The hydraulic knot of the management contains the cylinder of tandem of main brake that makes working advanced brakes and the hydraulic auxiliary device that makes working behind brakes. The hydraulic auxiliary device contains six valves eletromagnéticas made work for the device of electronic actuation, regulating the pressure in brakes of separate wheels and consequently also curbing the force. When three entered valves eletromagnéticas during the normal frenagem they it leaves opening (without slipping), and three final valves – closed. They are located in outlines of the right advanced brake, the left advanced brake and rear brakes.

Functioning

When one of four sensors of the speed of the rotation transmits a sign of the blockade of the corresponding wheel, immediately the device of electronic actuation gives a final sign to the corresponding entry valve eletromagnética what immediately blockades the provision of fluid of brake he was seeing the oil pipeline of brake to a brake of this wheel – the force of the frenagem remains to the constant one. If however the escorregamento continues, then the final valve and the pressure in the hydraulic system of this brake open reductions – the wheel is not curbed (the excess of fluid of brake returns to a tank). As soon as the wheel launches again rotation, at the same time there is an opening of the valve of entry and the close of the final valve. The pressure increases in an outline and the wheel is curbed again.

Such a cycle of frenagem and free rotation of a wheel takes place very quickly (several times inside a second) and continues to a stop of the car or to a pedal of brake otpuskaniye.

The antiblockade of system (ABS) works in a speed of the movement more than 7 km/h.