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BL BOSCH 5.3 ABS. System Description of BL ABS презентация
Содержание
- 1. BL BOSCH 5.3 ABS. System Description of BL ABS
- 2. ▶ System - BOSCH ABS
- 3. EV AV MOTOR PUMP BL ABS Specification
- 4. ▶ABS5.3 model HECU
- 5. HECU Location
- 6. ▶ABS 5.3 ▶Top view ▶Bottom view
- 7. ▶ Never Disassemble HECU ▶ valve seat coil assembly ABSCM Housing
- 8. ABSCM Input & Output
- 9. VALVE, MOTOR RELAY FUSE Valve/Pump motor relay fuse
- 10. Acceleration Sensor
- 11. Return Pump Hydraulic Unit
- 12. ▣ Normal Condition Hydraulic Unit (Modulator)
- 13. Brake pressure from the M/C directly
- 14. Stiff braking pressure → reduced friction,
- 15. To make a proper decision of
- 16. If a frictional force between tire
- 17. 1. EBD Modulation 2. Advantage
- 18. EBD Modulation * EBD control example
- 19. EBD Curve
- 20. (load sensitive) proportioning valve may be
- 21. Failure Matrix of EBD Rev.4
- 22. EBD & Parking brake lamp • ECU
- 23. 1. ABS & EBD Warning Lamp(Passive
- 24. ABS & EBD Warning Lamp(Passive Type)
- 25. ABS External Wiring Diagram
- 26. Wiring Diagram
- 27. ABSCM Connector
- 28. Pin Assignment
- 29. 1. DTC list 2. System
- 30. Troubleshooting DTC list
- 31. Troubleshooting DTC list
- 32. Troubleshooting DTC list
- 33. Detection period A: Initial check B: No
- 34. Failsafe after detecting failure a) System down,
- 35. ☞ 나머지 조건들은 “Failure List of Self Diagnose” 참조 Troubleshooting System failure diagnosis
- 36. 1. Same procedure as CBS air-bleeding 2.
- 37. Troubleshooting
Слайд 2▶ System
- BOSCH ABS 5.3
-
- BRAKE Line : X Split
- ABS with EBD Control
▶ Hydro-Electronic Control Unit (HECU )
- Hydraulic Modulator : Size(84 X 118 X 170mm), Weight(2.6Kg)
- Motor : Large Size(180W)
- Solenoid Valve : Sol-Sol Type(Inlet/Outlet)
- ECU : Attached ECU
▶ Wheel Speed Sensor
- Inductive Sensor(Passive Type)
- Minimum P-P voltage : 120mV (2.75KPH)
▶ Acceleration Sensor
- Offset Voltage : 2.5V
- Operating voltage : 4.5V ∼ 5.5V
BL ABS Specification
Слайд 6▶ABS 5.3
▶Top view
▶Bottom view
ECU connector
Accumulator
Damping
Chamber
Motor Power line
HECU Appearance
Слайд 13 Brake pressure from the M/C directly delivers to wheel cylinders
Normal braking without the operation of NO, NC valves
Normal condition
D
D
Слайд 14 Stiff braking pressure → reduced friction, Wheel Lock-up tendency
ABSCM
Pump Motor dumps brake pressure to the M/C side
Pressure Dump
D
D
Слайд 15 To make a proper decision of wheel rotation while pressure
To hold the brake pressure of wheel cylinder
Pressure Hold
D
D
Слайд 16 If a frictional force between tire and road surface increases,
Pressure Increase
D
D
Слайд 17 1. EBD Modulation
2. Advantage of EBD
3. EBD
EBD(Electronic Brake-force Distribution)
Слайд 20 (load sensitive) proportioning valve may be omitted
increase of rear
Approach to ideal brake-force distribution
(straight-ahead and bend driving)
Adaptive to different loading conditions
Constant brake-force distribution during vehicle live time
Monitoring of EBD-function
Minimal extension of ABS hardware required
Advantages of EBD
Слайд 22EBD & Parking brake lamp
• ECU Failure
• Solenoid Valve Failure
• Paring
• Lacking of Brake Oil
• Short ’ G Bar failure
• Wheels sensor failure (Open or short) • Pump Motor & Valve Fuse Open
• Low / High Voltage
• While diagnosis
• Short ’ G Bar failure
ABS Warning Lamp
Illuminate for 3 seconds after IG key ON
ABS & EBD Warning Lamp
Слайд 23 1. ABS & EBD Warning Lamp(Passive Type)
2. ABS
3. ABSCM Connector
4. Pin Assignment
Function of ABS & EBD Warning Lamp Relay
Слайд 33Detection period
A: Initial check
B: No ABS control
C: ABS in operation
D: Diagnostic
E: Error state
Failure detection
＋: Failure detection is possible
－: Failure detection is not possible
Troubleshooting
System failure diagnosis
Слайд 34Failsafe after detecting failure
a) System down, ABS/EBD W/L, valve relay/solenoid valve
B) ABS inhibition,EBD available, ABS W/L ON, EBD W/L OFF
c) Sensor failure in no ABS operation
d) Sensor failure in ABS operation
e) Low voltage
f) Motor in ABS operation
Troubleshooting
System failure diagnosis
Слайд 361. Same procedure as CBS air-bleeding
2. When air remains inside brake
- Normal air bleeding procedure
- Air bleeding with Hi-scan
3. When replacing a new HU(Hydraulic unit, Wet Type):
- Normal air bleeding procedure
Troubleshooting
System Air-bleeding
