Training hệ thống ESP của xe ô tô Hyundai Santafe CM
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CM
ESP/ESC (Bosch 8)
2
Variation
Line-up (BOSCH 8 ABS/ESP)
S: Standard, O: Option
General M/East Europe Aust. USA/Canada
ABS
ESP/ESC
O
(GL,GLS,
LWB, SWB)
O
(GLS, LWB,
SWB)
O
(GL,GLS,
LWB)
O
(GLS, LWB, SWB)
S
(GL,GLS,LWB,SWB)
Area
3
COMPONENTS OF ESP SYSTEM
4
VARIANT CODING
Perform the variant coding if there is a ESP OFF W/L on with a ‘C1702
(Variant Coding Error)’ after replacing a ECM,TCM or ESPCM.
5
Construction
HYDRAULIC CONTROL UNIT
Solenoid Valve (x12)
Valve Coil (x12)
Low Pressure Chamber
Piston (x2)
Pump (x2)
Motor
Pressure Sensor
ESPCM
6
Prevent a pressure overshoot or undershoot → Control range decrease
- Noise : Pulse-Up Noise decrease
- Enhanced Pedal Feeling
On/Off
LFC
Pressur e
Over shoot
Pressur e
Undershoot
Ski d
Pr essure
∆P
µ
Sl i p
LFC Cont r ol Range
On/Of f Cont r ol Range
Effect of LFC (Linear Flow Control)
LFC (Linear Flow Control)
7
ACTUATION TEST
PWM control PWM control
ON/OFF control ON/OFF control
8
HECU
Pressure sensor
Operating condition
HYDRAULIC BRAKE ASSIST
- over 30 bar
- over 2,200 bar/sec
- over 20 km/h
9
INPUTS AND OUTPUTS
Pressure Sensor
(HCU Built-in type)
10
ACTIVE WHEEL SPEED SENSOR
MAX TYPICAL MIN
LOWER SIGNAL I
LOW
(mA) 5.9 7 8.4
UPPER SIGNAL I
HIGH
(mA) 11.8 14 16.8
SIGNAL RATIO I
HIGH
/ I
LOW
OUTPUT SIGNAL
OPERATING FREQUENCY
OPERATING DUTY
1.85 or more
1 ~ 2500 Hz
30~70%
Type: Hall Effect
Output signal: Digital (Open Collector Type circuit integrated)
Good characteristics against temperature variation and noise
Low RPM Detection: 0 RPM can be detected
Air gap sensitivity: stable output pulse against air-gap change
-
upplying power: DC 12V
11
ACTIVE WHEEL SPEED SENSOR
Inspection
Teeth: 48
12V GND
Battery
R(100Ω)
Oscilloscope
V
high
= 1.2~1.7V
V
low
= 0.6~0.8V
