Suspension Control ( Automatic - Electronic ): Description and Operation

System Outline

- The electric modulated suspension with height control, is a system designed to maintain a constant ride height by means of an electro-pneumatic system in the rear suspension-to cope with change in load due to possible change in the number of people and/or the weight of cargo the vehicle has to carry. With three driver's-choice height-control switches on the console, the driver can set ride height to any one of the three different ride height modes (High, normal and low): "High mode" for rough terrain and "Low mode" for passenger to get on or get off, and for cargo to be loaded or unloaded.

- This system has five basic controls as shown below:

- Auto leveling control
This control maintains a constant rear vehicle ride height regardless of change in load due to possible change in the number of passengers and/or the weight of cargo the vehicle has to carry.

- Ride height switchover control
This control switches over height mode to the mode selected by the height control switch.
- High mode (+ 40 mm / 1.6 in.)
- Low mode (-20 mm / 0.8 in.)

- Speed sensing control
Regardless of the initial height mode setting, "High mode" or "Low mode," this control automatically switches over vehicle height mode to the optimum "Normal mode":
- When the vehicle speed reaches or exceeds 30 km/h with height mode set to "High mode," or;
- When the vehicle speed reaches or exceeds 5 km/h with height mode set to "Low mode."

- Subsequent control after ignition switch off
After the ignition switch is turned OFF, this control lowers the rear vehicle ride height to offset rear vehicle ride height elevation due to passengers getting off, etc.

- Height control OFF control
Pressing the height control mode select switch turns the system OFF, making it possible for the vehicle to be jacked up or towed.