Iveco Daily. Manual

102279

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 46/13

51/17

HYDRO-PNEUMATIC SYSTEM - BRAKES

AILY

Revi - February 2005

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 46/14

102280

HYDRO-PNEUMATIC SYSTEM - BRAKES

51/18

AILY

102282

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 “6”. Pressure shall be such that further reduction of the braking distance will be ensured

Figura 46/15

51/19

HYDRO-PNEUMATIC SYSTEM - BRAKES

AILY

Revi - February 2005

102283

HHC 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 longitudinal acceleration sensor “4” finds that the vehicle is on a slope, if the brake pedal is pressed down, and if either the first gear
or the reverse gear is engaged, 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”.
This function will automatically keep the vehicle braked over 2.5 seconds until the clutch is closed and the driver presses the accelerator
pedal again, thus avoiding uncontrolled motion of the vehicle.
It allows the driver to easily and safely start the vehicle on all slopes, regardless of the load carried.

Figura 46/16

HYDRO-PNEUMATIC SYSTEM - BRAKES

51/20

AILY

Content .. 330 331 332 333 ..

Iveco Daily. Manual - part 332