Fuse box
136
D760.H03E-001.H1907
ECAS operation
Please refer to the specific configurations of your vehicle (this section is only
applicable to the model with air suspension).
The rear air suspension system is designed with the international advanced and
mature electronically controlled air suspension (ECAS). The air suspension, a com-
plex system element assembly, can bring the elasticity effect by air in the compressive
and tensile rubber airbag. Therefore, its stiffness will change as the load changes.
Compared to the traditional leaf spring, this suspension features low inherent fre-
quency, long service life and light weight, and it can ensure the body height when the
load changes. The air suspension has an outstanding feature, that is, it can ensure
that the vehicle height keeps unchanged under no-load and full-load conditions.
Working principle of ECAS
The working principle of ECAS is as shown in Fig. H-T01-026.
Based on a constant comparison between reading provided by the height sensor
and design index height H stored in ECU, ECAS can identify the current height of the
vehicle at any time; once the difference between current height and design index
height (H) exceeds the tolerance range, the solenoid valve will be activated, and
opening or closing the corresponding valve will increase or decrease pressure of the
airbag, so it is required to adjust the actual height of the vehicle to the initial design
index height.
1. ECU
2. Solenoid valve
3. Height sensor
4. Airbag
5. Remote controller
H: Design index