The device and repair of Kia Sportage SUVs (KIA of Sportazh) - the General information and security measures-//kupit-derevo.ru
KIA of Sportazh - Kia Sportage
Governing bodies and operation receptions
Current leaving and service
Engine
Systems of cooling, heating, ventilation and air conditioning
Power supply systems, managements of engine/decrease in toxicity of the fulfilled gases and production of the fulfilled gases
Systems of electric equipment of the engine
Five-step manual box of gear shifting
Automatic transmission
Transmission line
Brake system
   General information and security measures
   Checks and adjustments of a pedal of a foot brake
   Check of the lever of the parking brake
   Check of serviceability of functioning of the vacuum amplifier of brakes
   Check of the differential perepuskny valve regulator of pressure (model without ABS and EBD)
   Removal and installation of a pedal of a foot brake
   Removal, service and installation of the main brake cylinder
   Removal and installation of assembly of the vacuum amplifier of brakes
   Assessment of degree of wear, replacement of blocks of disk brake mechanisms of forward wheels
   Dismantling of the brake mechanism of a forward wheel, assessment of a condition of a disk
   Removal and installation of flexible brake hoses of a hydraulic path of brake mechanisms of forward wheels
   Service of drum-type brake mechanisms of back wheels
   Removal and installation of the lever of the parking brake, adjustment of a driving cable
   Pumping of brakes
   Reading of codes of malfunctions of ABS/EBD, cleaning of memory of the processor
   Removal and installation of hydraulic and electronic ABS/EBD control units
   Removal, check installation of wheel ABS sensors
   Replacement of rotors of ABS sensors of forward wheels
Suspension bracket and steering
Body
Onboard electric equipment
Control body sizes
Schemes of electric connections



Kia Sportage>> Brake system>> General information and security measures

General information and security measures

General information

Base brake system

On KIA Sportage cars the standard base double-circuit hydraulic brake system with vacuum strengthening is used. At refusal of any of contours (for example as a result of sealing violation) the second continues to function in a normal mode, providing adequate braking of a vehicle. Forward wheels are equipped with brake mechanisms with ventilated disks, back - drum-type mechanisms. In addition the proportional valve regulator of pressure providing dynamic correction of effort of braking of back wheels according to change of load of a back axis of the car is built in a contour of a drive of back brake mechanisms. The lever parking brake has the mechanical hummock drive connected to brake mechanisms of back wheels of the car.

Scheme of the organization of base brake system of KIA Sportage cars

1 — the Pedal of a foot brake
2 — ГТЦ
3 — the Vacuum amplifier
4 — the Disk brake mechanism of a forward wheel

5 — the Drum-type brake mechanism of a back wheel
6 — the Differential valve regulator
7 — the Lever of a drive of the parking brake
8 — the Cable of a drive of the parking brake

Pressure of liquid in both contours is created by the main brake cylinder (GTTs) having a tandemny design. Activation of GTTs occurs when squeezing a pedal of a foot brake. As a result of increase of hydraulic pressure in working contours of brake system pistons of wheel cylinders are squeezed out of cylinders, providing pressing of frictional blocks/boots to brake disks/workers to surfaces of drums of wheel assemblies.

The tank with brake liquid is fixed on main the brake cylinder (GTTs) and supplies with a working body all hydraulic a path of brake system.

On petrol models the brake amplifier accumulates a part of the depression created in the inlet pipeline of the engine. On diesel models, in view of lack of such source of depression, the special vacuum pump is used. In case of need the special valve provides connection of the relevant source of depression, providing with that strengthening of the influence developed by a pedal of a foot brake.

Electronic systems of anti-blocking of brakes (ABS) and distribution of brake forces (EBD)

ABS

On the vehicles equipped with base brake system sharp squeezing of a pedal of a foot brake leads to blocking of wheels. Coupling of a protector with a paving and the car is thus broken can go yuzy, losing controllability. The system of anti-blocking of brakes (ABS) prevents premature blocking of wheels, continuously operating speed of their rotation during braking at the expense of modulations of pressure of hydraulic liquid in each of brake mechanisms.

4-channel ABS of the MGH 10 type enters into a complete set of the separate KIA Sportage models with three wheel sensors and the equipped electropump the electronic and hydraulic control unit.

Scheme of the organization of system of anti-blocking of brakes of KIA Sportage cars

Forward wheels are equipped with the individual wheel sensors fixed on assemblies of rotary fists, - gear rings (rotors) of sensors are planted on stupichny assemblies.

Details of installation of wheel ABS sensors

The back ABS sensor traces frequency of rotation of a box of differential in a reducer of not cutting back bridge. The sensor is inserted into a case of a reducer and приболчивается to it, - the rotor fastens on a differential box (see an illustration the Order of dismantling of a reducer of the back bridge).

The principle of functioning of ABS is explained on the scheme. The hydromodulator provides three operating modes of ABS: mode of dumping of pressure, mode of deduction of pressure and delivery mode.

Schematic diagram of functioning of ABS

1 — the Pedal of a foot brake
2 — the Vacuum amplifier
3 — the GTTs Tank
4 — ГТЦ
5 — the Accumulator of a high pressure
6 — the Accumulator of low pressure

7 — Elektronasos
8 — Inlet valves (are normally open)
9 — Final valves (are normally closed)
10 — the Brake mechanism of the right forward wheel
11 — the Brake mechanism of the left forward wheel
12 — the Brake mechanism of a back wheel

Principle of functioning of ABS

When ABS is not involved, a food on electromagnetic valves does not move and they remain in the normal provisions, i.e., inlet valves leave opened a contour connecting GTTs with wheel, while final block channels «wheel cylinders - the GTTs tank», preventing thereby pressure dumping.

As soon as ECU receives information from any of wheel sensors about the beginning of blocking corresponding wheels/wheels, it develops command for transition of the hydromodulator in a mode of dumping of pressure, upon the corresponding electromagnetic valves power supply therefore inlet valves are closed moves, interrupting pressure giving from GTTs to wheel cylinders, final, on the contrary, open, providing dumping of working pressure in the corresponding contours.

When pressure in working contours falls to critical value, ECU provides hydromodulator switching in a deduction mode by removal of a food from final valves which come back to normally closed position). Thus pressure dumping in the tank of system stops.

When ECU decides that the risk of blocking of wheels is completely prevented, it provides removal of a food from all valves of the hydromodulator and system comes back to a base delivery mode.

The described cycle repeats with frequency of one hundred times a second to a full stop of the car.

At detection of malfunction in an electric or hydraulic part of a control system the ABS control unit (ECU) of system provides with functioning transition it in emergency operation in which a food from all valves of the hydromodulator acts in film, and in a combination of devices the control lamp of ABS (is activated see. Head Governing bodies and operation receptions). The base hydraulic brake system thus continues to function in a usual mode, providing adequate braking of the car. The driver at movement on a slippery paving should observe extra care.

EBD system

With a view of prevention of risk of loss of control over management as a result of drift at premature blocking of back wheels in brake systems of a base design the special valve regulator regulating pressure in brake mechanisms of back wheels depending on load of a back axis of the car is used. Thus the less loading, the smaller pressure moves on back wheel cylinders. As a result, during sharp braking when the center of gravity of the car is displaced forward, the risk of blocking of back wheels before lobbies comes to naught to naught. The main lack of such scheme is conducting to increase in a brake way appreciable decrease in efficiency of functioning of back brakes.

Let's notice also that the form of ideal curve dependence of pressure in contours of back brakes from pressure in lobbies is defined also by identity of structure of a material of frictional overlays of brake blocks/boots. Thus, to achieve optimum distribution of brake forces mechanically it is not obviously possible in principle.

One more lack of use of valves regulators is lack of possibility of the organization of the notification of the driver about their refusal. As a result, the risk of loss of control over driving at sharp braking considerably increases.

Use in standard systems of anti-blocking of brakes of the electronic and hydraulic control unit suggested an idea developers about possibility of the organization of additional monitoring of the moment of the beginning of blocking of the back wheels, allowing to make controllable dumping of pressure in a back brake contour with the minimum deviation from curve ideal dependence of distribution of brake forces.

The comparative charts illustrating distinction in principles of functioning of the valve regulator and EBD system

Thus the principle of the organization of management of pressure dumping in back brake mechanisms is similar to a principle used in ABS: ECU carried out under control switching of electromagnetic valves of the hydromodulator.

Schematic diagram of functioning of EBD system

1 — the Pedal of a foot brake
2 — the Vacuum amplifier
3 — GTTs with the tank
4 — the Accumulator of low pressure

5 — the Accumulator of a high pressure
6 — Inlet valves (are normally open)
7 — Final valves (are normally closed)

Application of EBD system allows in an essential measure to reduce length of a brake way and to reduce the effort necessary for squeezing of a pedal of a foot brake. Besides, the effect of decrease in efficiency of functioning of brakes as a result of a warming up of frictional overlays of blocks of forward wheels at the expense of increase of return of back brake mechanisms is compensated.

One more positive EBD property is possibility of the organization of the prevention of the driver about a system exit out of operation, - the standard control lamp brake systems/raisings of the parking brake (is for this purpose used see. Head Governing bodies and operation receptions).

As when functioning EBD the electric pump of the hydromodulator system functioning, in difference from ABS is not used, does not interrupt even at a critical voltage reduction of the storage battery. The comparative scheme of functioning of ABS and EBD systems is presented in the table.

Violation

System

Control lamp

ABS
EBD
ABS
EBD
No Functions Functions Vykl Vykl
Refusal of one of wheel sensors Does not function Functions R Vykl
Failure of the electropump Does not function Functions R Vykl
Critical voltage reduction of the battery Does not function Functions R Vykl
Failure of several sensors, failure of valves, ECU refusal, other refusals Does not function Does not function R R

Operations procedure at operation of a control lamp of ABS during movement

 PERFORMANCE ORDER

  1. Stop the car, switch off the engine and again start it.
  2. Check level of tension of the storage battery, - if the result of measurement makes less than 10.5 In, make battery additional charge.

If the control lamp of ABS lights up at a start of motion and then after a while dies away, it specifies a voltage reduction of the storage battery which then is compensated for the account of the beginning of functioning of the generator.

  1. Make sure of reliability of fastening of tips of wires on polar plugs of the battery, in case of need tighten fixture.
  2. Hang out the car over the earth, remove wheels and check a condition of electroconducting of wheel sensors.
  3. More detailed diagnostics should be carried out in conditions HUNDRED with use of the special equipment for reading written down in memory of the module of management of codes of malfunctions (DTC), - the list of DTC ABS is provided in Specifications of Head Brake system.

Security measures

  • Brake liquid is among highly toxic and chemically aggressive connections and at hit on body panels destroys a paint and varnish covering!
  • The brake dust developed in the course of wear process of brake shoes can contain unhealthy the person asbestos, - at all do not inhale it when cleaning brake mechanisms!
  • Work with brake system demands special purity and exact observance of instructions. In the absence of necessary experience it is expedient to address on HUNDRED.

At movement on wet roads it is necessary to press periodically a brake pedal for moisture removal from brake disks;

  • In the course of wheel rotation moisture under the influence of centrifugal force is dumped from brake disks, but there is a silicone film, products of an istiraniye of rubber, greasing and the other pollution reducing efficiency of braking!
  • After installation of new brake shoes the last should be earned extra, - try to avoid sharp braking the first 200 km of run after replacement performance!
  • The disk brake mechanisms damaged by corrosion when braking create the effect of jolting which is not disappearing over time, - replace disks!
  • Dirt burning to a surface of brake shoes lead to formation of furrows on a surface of brake disks that leads to decrease in efficiency of braking!