Hyundai Genesis: ECS(Electronic Control Suspension) System / Description and Operation
Hyundai Genesis (DH) 2013-2016 Service Manual / Suspension System / ECS(Electronic Control Suspension) System / Description and Operation
| Description |
Real-time continuous control of the damping force according
to vehicle running conditions and the state of road surface will enhance
ride comfort and steering safety, including roll/pitch reduction in
case of vehicle dynamics control, quick turning, braking, and starting.
Continuously Variable Damper
Damping force variable solenoid valve current will be
controlled by ECU. Depending on change in the current amount, , the
spool valve will move in the actuator to change flowing route and lead
to the damping force variation.
Front Continuously Variable Damper
Rear Continuously Variable Damper
Solenoid Valve
Sensor
| Item | Shape | Function |
| body G-sensor |
| Body motion detection Sky hook damping control(pitch, bounce control) |
| Wheel G-sensor |
| Wheel roughness detection Damper velocity estimation |
| Vehicle Signals | Vehicle Speed Throttle position sensor Brake Steering Angle Drive mode switch signal | |
| Steering angle sensor |
| Estimation Of The Driver's Steering Left/Right acceleration measurements |
ECU
Damping force variable solenoid valve current will be controlled by ECU.
| Operation |
System
Check the MCU and the state of each part when electric power
is applied to ECU and prepare to operate. ECU operates the actuator when
the engine is started.
System operation mode
Normal operation
4 types of driver selection mode such as “NORMAL”
or“ECHO” or “SNOW” and “SPORT” are provided and the mode is
changed by linking to the driving integration mode.
Emergency mode
When the failure is detected, the system is converted to the
corresponding emergency mode depending on the type of failure and it
warning signal blinks.
Damping control
The damping control may improveboth the ride comfort and
steering stability. The damping control is implemented through the
skyhook control and adoptive style control and The sky hook classifies
the body movement into the bounce, roll and pitch and separately
controls each one of them. The special driving conditions like the rapid
lane changing, abrupt acceleration and abrupt starting restrict the
solenoid maximum current to acquire the stability on the vehicle. The
solenoid of each wheel is driven with PWM and the target current is
output through electric current controlling.
Sky hook control
The vertical movement of the car body is controlled by the
vertical acceleration of the body and wheels. The sky hook controls the
solenoidal current on each wheel proportionally with the estimated
damper speed.
| 1) |
Deciding the road surface
The damping control decides the road surface condition with
the vertical acceleration sensor on the front wheel, body and wheels.
The road surface is classified into 5 types of General, Rough
road 1, Rough road 2, Wave and Bump through checking the acceleration
signal intensity and frequency. The decided road surface according to
the pre-determined priority determines the calibration parameter for
calculating the target electric current. The road surface decision
parameter may be corrected through calibration. |
| 2) |
Bounce controlling
The bounce speed of car body can be obtained by adding the
vertical speed of 4 wheels. The car body vertical speed can be estimated
by integrating the acceleration signal. The required damping force can
be calculated by multiplying the proportional gain and bounce speed and
through the maximum value limiting function. The calibration parameters
are the gain and limit value. The front and rear wheel have different
values. |
| 3) |
Pitch control
The pitch speed of car body can be obtained through the
front/rear wheel car body speed difference. The required damping force
can be calculated by multiplying the proportional gain and bounce speed
and through the maximum value limiting function. The calibration
parameters are the gain and limit value. The front and rear wheel have
different values. |
| 4) |
Roll control
The car body roll speed can be obtained through the
difference on the car body speed. The required damping force can be
calculated by multiplying the proportional gain and bounce speed and
through the maximum value limiting function. The calibration parameters
are the gain and limit value. The front and rear wheel have different
values. |
| 5) |
Damping speed estimation
The damper speed can be estimated with the difference in the
body and wheel vertical speeds, and the vertical speeds of the body and
wheel can be obtained through integrating the acceleration sensor
signal. The acceleration on rear wheel can be estimated by means of time
delay in front wheel and car speed. |
| 6) |
Directivity check
The final damping force required by sky hook is decided by
“passivity condition.' The passivity checking decides the Y/N of
damping force control. The finally required damping force is set through
the solenoid electric current control when the required damping force
and damper velocity are in the same direction. If they are in the
opposite direction, it is set as the soft damping force. |
Adaptive control
| 1) |
Anti roll control
The transversal vehicle movement can be estimated by steering
angle sensor and car speed. The maximum electric current control is
restricted when the transverse jerk movement signal is beyond the set
value. The calibration parameters are the jerk signal level controlling
the damping force and damping force control amount and they can be set
depending on the vehicle speed. |
| 2) |
Anti dive control
The speed reducing on the vehicle during braking is
calculated by the car speed difference. The maximum electric current
control is restricted when the calculated speed reduction is bigger than
the set value. The calibration parameters are the speed reduction level
and damping force controlling amount. |
| 3) |
Anti squat control.
The intention of accelerating by the driver can be expected
with the acceleration pedal location information at the start. The
maximum electric current control is restricted during acceleration when
the location is beyond the set value. The calibration parameters are the
speed reduction level and damping force controlling amount. |
| 4) |
Vehicle speed sensing control
It is a function to maintain the minimum damping force
depending on vehicle speed. The maximum electric current is restricted.
The calibration parameter is the damping force controlling amount
depending on vehicle speed. |
| 5) |
Damping control mode
The driver may choose either of two modes (Auto and Sport).
The conversion of the damping modeis linked to the driving integration
model. ECS control is performed in AUTO mode when NORMAL mode/ECHO
mode/SNOW mode is selected in the driving integration mode switch. ECS
control is performed in SPORT mode when SPORT mode is selected. The
calibration parameters saved into ECU are changed depending on the
selected damping control mode and the vehicle moving performance may
differ for each mode. The ride comfort and steering stability are
optimized in AUTO mode in general. The SPORT mode focuses on the
steering stability. |
Components and Components Location
Components
1. ECU2. Front Continuously Variable Damper3. Wheel G-Sensors4. Rear Continuously Variable Damper5. Body G-Sensors
Components Location
ECS-ECU
Body G-Sensors
[Right Front]
[Le ...
Schematic Diagrams
Schematic Diagrams
1.
Connector input/output
No.DescriptionPin No.Description1Battery(+)20-2Solenoid RL (+)21-3Solenoid RR (+)22-4Solenoid FL (+)23-5Solenoid FR (+)24-6- 25G- sensor power7- 26B ...
Other information:
Hyundai Genesis (DH) 2013-2016 Service Manual: Rear Wheel Speed Sensor Components and Components Location
Components 1. Rear wheel speed sensor cable2. Rear wheel speed sensor ...
Hyundai Genesis (DH) 2013-2016 Service Manual: Components and Components Location
System Diagram 1. PGS Unit2. AVN monitor (LCD)3. Rear view camera ...
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