Презентация на тему VSM(Vehicle Stability Management)

VSM (Vehicle Stability Management)

Centennial / Equus

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SCC
(Driving Condition Monitoring)

ESC
(Braking Control)

PSB
(Haptic Warning/Full Retraction)

Cluster
(Warning Lamp/Buzzer)

Overview

▶ VSM utilizes ESC, suspension, braking, and smart cruise control systems to control
the vehicle’s dynamics, including power distribution, braking, and acceleration.

EPB Control

ECS Control

1. SCC Sensor and Control Module
2. ECM
3. ESC (Brake)
4. Wheel Speed Sensor (4EA)
5. Yaw-rate Sensor
6. Steering Angle Sensor
7. Cluster
8. CAN Communication

Overview – SCC (Smart Cruise Control)

▶ SCC Operation range : 10~180km/h(kph) - 10 ~ 30kph (only for reducing speed), 30~180kph (actual control operation range)

SCC (Smart Cruise Control)

▶ Disengaged condition
- Vehicle Speed : 10kph ↓ or 180kph ↑
- SCC system fail
(SCC sensor / ESC / ECM / Cluster)
- R - Position
- EPB activated
- Shift from D to 1st gear (sports mode)
- ABS / TCS / ESC activated
- ESC OFF switch on

Constant Speed
Set speed : 100km/h
Host vehicle speed : 100km/h

Reduce Speed
Set speed : 100km/h
Relevant object : 80km/h
Host vehicle speed :
→ reduce to 80km/h

Maintain distance
Set speed : 100km/h
Relevant object : 80km/h
Host vehicle speed : 80km/h

Acceleration
Set speed : 100km/h
Host vehicle speed :
→ increase to 100km/h

SCC Driving Mode

SCC Sensor Alignment

● Reason for alignment
- To get the right position of the targets on the road.
● Normal Alignment




● Abnormal Alignment




※ The sensor detect a relevant target in other lane.
● The sensor must been adjusted.

1. Start rotation of rear wheel

2. Fix dynamometer brake

▶ Start rotation of rear wheel (approximately 3 revolutions)
▶ Rear axis is parallel to dynamometer axis
▶ Vehicle thrust vector is perpendicular to the mirror

SCC Sensor Alignment

The mirror is perpendicular to the ground

Reflector

SCC Sensor Alignment

▶ Once the sensor alignment is performed by the GDS,
SCC module automatically executes the alignment
process by moving the location of the sensor
(automatic process).

ESC

▶ ABS (Anti-lock Braking System)

▶ EBD (Electronic Brake-force Distribution)

▶ CBC (Cornering Brake Control)

▶ BAS (Brake Assist System)

▶ TCS (Traction Control System)

ESC Overview

ESC Specification

Sensor Cluster (Module)

Pressure Sensor

Wheel Speed Sensor

Solenoid Valve

[CAN Communication]
◈ Input
- SAS, Gear Position…
◈ Output
- Warning Lamp (ESC / VSM)
- Indicator (ESC)

Motor Pump

Brake Switch

ESC OFF Switch

CAN

AVH / VSM Switch

Stop Lamp Relay

Wheel Speed Sensor Output

H
E
C
U

Inputs and Outputs

※ The signal of SAS is transmitted via power train high speed CAN.

Sensor cluster

▶ Included Sensor: Yaw rate / Lateral / Longitudinal G sensor
※ It has a function of self-diagnosis and sends the output
signal to ESC via private CAN line.

Sensor cluster

Failsafe

Pressure sensor

▶ W/O SCC: 1EA ▶ W/SCC: 3EA (ESC:1EA, SCC:2EA)

[MK25]

Pressure sensor

[MK25-E5)

Wheel speed sensor & HECM

[WSS – Front ; built in the hub bearing]

▶ Type
- Front : Hall IC type
- Rear : Magnetic type
▶ Spec.: 7mA ~14mA

[HECM]

[WSS – Rear]

SAS (Steering Angle Sensor)

▶ Type
- Contact-less type
- Outputs via CAN interface
- Range: -780˚ ~ + 780˚
- ESC Module receives steering wheel angle
sensor signals from powertrain CAN.

[SAS]

IGN

GND

SAS

ESC

CAN HI

CAN LOW

Powertrain CAN

▶ SAS Alignment
① Perform front wheels alignment and align steering wheel to within ± 5˚
② Connect the scanner
③ Perform SAS calibration menu
④ After disconnect scanner and confirm
- Road Test : Turn left once and right once and warning light must not go off

System Maintenance

VSM Functions

0,3g

Pre-Brake

Prefill

Deceleration rate variation

BAS

Primary Warning
(Cluster)

Time

With VSM

Without VSM

Foot movement
(Accel → Brake)

Threat recognition

Brake pedal activation

Seatbelt
vibration

Retraction

Deceleration rate

Max.
Deceleration rate

Required
Deceleration rate

Secondary Warning
(Cluster + seatbelt vibration)

Braking Control

VSM off Lamp (Switch on, Fail)

Blink (2Hz)+Buzzer(2Hz)

Blink (2Hz)+Buzzer(Continuously))

AVH
Stand by

AVH
Active

EPB
Warning

ESC

ESC OFF

EPB
Clamp

TPMS
Warning

TPMS
Low Pressure
Warning

Warning Control