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Hyundai AccentRepair and car operation |
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Hyundai Accent + 1. Maintenance instruction + 2. Engine + 3. Greasing system + 4. Cooling system + 5. Control, decrease in toxicity + 6. Fuel system + 7. Ignition system + 8. Coupling + 9. Transmission + 10. Axes and power shafts + 11. Suspension bracket + 12. Steering - 13. Brake system 13.1. Specifications 13.2. Anti-blocking system of brakes (ABS) 13.3. Pumping of hydraulic system of a drive of brakes with scanner use 13.4. Check and adjustment of provision of a pedal of a brake 13.5. Check of the vacuum amplifier of brakes 13.6. Pumping of hydraulic system of a drive of brakes 13.7. Adjustment of a course of the parking brake 13.8. Vacuum amplifier of brakes 13.9. Brake tubes and hoses 13.10. Pressure regulator 13.11. Brake pedal 13.12. Replacement of forward brake shoes 13.13. Support of a forward brake 13.14. Main brake cylinder 13.15. Replacement of brake shoes on back drum-type brakes 13.16. Replacement of the working brake cylinder 13.17. Parking brake 13.18. Hydraulic HECU ABS block 13.19. Sensor of frequency of rotation of a wheel 13.20. Search and elimination of malfunctions + 14. Body + 15. Central air + 16. Electric equipment + 17. Appendix + 18. Electroschemes |
13.2. Anti-blocking system of brakes (ABS)The anti-blocking system of brakes is intended for an exception of blocking of wheels at intensive braking. Main ABS functions: – reduction of a brake way at the expense of an exception of blocking of wheels at intensive braking; – improvement of stability of driving in the course of braking. The anti-blocking system of brakes works at information basis from four sensors, transferred to the ABS block. The system operates each wheel separately and reduces pressure of liquid in that wheel brake mechanism which wheel starts to be blocked. Under normal conditions the standard brake system carries out braking till blocking of the wheel found by the ABS control unit. During usual braking inlet valves usually open, and final valves are usually closed. When the ABS control unit finds wheel blocking, it operates each valve for increase or pressure reduction. The ABS control unit defines frequency of rotation and norm of delay of each wheel on the basis of information from sensors of frequency of rotation of a wheel. When braking frequency of rotation of a wheel decreases and the ABS block defines a difference between speed of the car and frequency of rotation of a wheel. If delay of some wheels exceeds expected value, the ABS block defines the beginning of blocking and opens the corresponding electromagnetic valves to reduce pressure of brake liquid. Thus frequency of rotation of a wheel increases and the electromagnetic valve of dumping of pressure is closed and there is an increase in pressure of brake liquid in the working brake cylinder of the corresponding wheel. |
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