Iveco Daily. Manual

102290

ESP device intervention

1. Vacuum servobrake - 2. Yaw sensor - 3. Steering angle sensor - 4. Longitudinal acceleration sensor -

5. EDC motor control unit - 6. ESP electronic control unit - 7. Intake solenoid valves - 8. Driving solenoid valves -

9. Scavenge pump control motor - 10. Scavenge pumps - 11. Single-acting safety valves - 12. Low pressure

accumulators - 13. Quick pressure decrease single-acting valves - 14. Power supply solenoid valves -

15. Discharge solenoid valves - 16. Pressure sensor - 17. Single-acting valves - DX/A. Front axle right wheel sensor -

SX/A. Front axle left wheel sensor - DX/P. Rear axle right wheel sensor - SX/P. Rear axle left wheel sensor

Control unit “6” can brake the single wheels to ensure vehicle stability under dangerous driving conditions.
The signals from yaw sensor “2”, steering angle sensor “3”, and longitudinal acceleration sensor “4”, as well as the speed signals
and the accelerator pedal position, provide information that allows the system to come into operation under vehicle
understeering or oversteering conditions.
Intake solenoid valves “7” and driving solenoid valves “8” will be actuated. At the same time, motor “9” will be actuated, which
controls pumps “10” so that the wheel(s) will be braked in order to correct the path.
Thanks to the CAN line communication with EDC motor control unit “5”, ESP control unit “6” will be able to act on engine
control, too.

Figura 46/21

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HYDRO-PNEUMATIC SYSTEM - BRAKES

AILY

Revi - February 2005

102288

MSR device intervention

1. Vacuum servobrake - 2. Yaw sensor - 3. Steering angle sensor - 4. Longitudinal acceleration sensor -

5. EDC motor control unit - 6. ESP electronic control unit - 7. Intake solenoid valves - 8. Driving solenoid valves -

9. Scavenge pump control motor - 10. Scavenge pumps - 11. Single-acting safety valves - 12. Low pressure

accumulators - 13. Quick pressure decrease single-acting valves - 14. Power supply solenoid valves -

15. Discharge solenoid valves - 16. Pressure sensor - 17. Single-acting valves - DX/A. Front axle right wheel sensor -

SX/A. Front axle left wheel sensor - DX/P. Rear axle right wheel sensor - SX/P. Rear axle left wheel sensor

If the sensors find that the driving wheels tend to drag due to the exhaust brake, control unit “6” will request a slight increase
of engine revs through the CAN line. This device ensures stability when releasing the clutch pedal on slippery roads (e.g. snow,
ice) and helps keep the path when taking a bend and shifting down, especially on slippery roads.

Figura 46/22

HYDRO-PNEUMATIC SYSTEM - BRAKES

51/26

AILY

102289

ASR device intervention

1. Vacuum servobrake - 2. Yaw sensor - 3. Steering angle sensor - 4. Longitudinal acceleration sensor -

5. EDC motor control unit - 6. ESP electronic control unit - 7. Intake solenoid valves - 8. Driving solenoid valves -

9. Scavenge pump control motor - 10. Scavenge pumps - 11. Single-acting safety valves - 12. Low pressure

accumulators - 13. Quick pressure decrease single-acting valves - 14. Power supply solenoid valves -

15. Discharge solenoid valves - 16. Pressure sensor - 17. Single-acting valves - DX/A. Front axle right wheel sensor -

SX/A. Front axle left wheel sensor - DX/P. Rear axle right wheel sensor - SX/P. Rear axle left wheel sensor

If the sensors find that one or both of the rear axle wheels tend to skid (at a speed of 6 to 10 k.p.h.), they will inform the control
unit: the latter will power intake solenoid valves “7”, driving solenoid valves “8”, and power supply solenoid valves “14”.

At the same time, the pressure to be conveyed to the brake calipers affected can be generated by powering motor “9” which
drives pumps “10”.

Figura 46/23

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HYDRO-PNEUMATIC SYSTEM - BRAKES

AILY

Revi - February 2005

102291

HBA device intervention

1. Vacuum servobrake - 2. Yaw sensor - 3. Steering angle sensor - 4. Longitudinal acceleration sensor -

5. EDC motor control unit - 6. ESP electronic control unit - 7. Intake solenoid valves - 8. Driving solenoid valves -

9. Scavenge pump control motor - 10. Scavenge pumps - 11. Single-acting safety valves - 12. Low pressure

accumulators - 13. Quick pressure decrease single-acting valves - 14. Power supply solenoid valves -

15. Discharge solenoid valves - 16. Pressure sensor - 17. Single-acting valves - DX/A. Front axle right wheel sensor -

SX/A. Front axle left wheel sensor - DX/P. Rear axle right wheel sensor - SX/P. Rear axle left wheel sensor

If the system recognizes, through pressure sensor “16”, an emergency braking condition, i.e. it detects a pressure increase
“

∆p/ ∆t” higher than normal braking, the control unit will power both intake solenoid valves “7” and driving solenoid valves “8”.

At the same time, the pressure to be conveyed to the brake calipers affected can be generated by powering motor “9” which
drives pumps “10”. Pressure shall be such that further reduction of the braking distance will be ensured

Figura 46/24

HYDRO-PNEUMATIC SYSTEM - BRAKES

51/28

AILY

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Iveco Daily. Manual - part 334