SsangYong Actyon Sports II. Manual — part 157

11-23

4890-10

1) Idling and Normal Braking Condition

In this position, the separation valve and the inlet valve are open (normal open), the electrically operated

shuttle valve and the outlet valve are closed.

When the brake is applied under these conditions, the brake fluid will be sent to each wheel via the

separation valve and inlet valve.

11-24

2) DUMP (ESP is working) Mode

The pressure decreases just before the wheel speed drops and the wheels are locked.

The inlet valve closes and the outlet valve opens as in the ABS HECU and the oil is gathered at the low

pressure chamber while no additional oil is being supplied. Then the pump operates to allow fast oil

drainage. The shuttle valve and the separation valve do not operate while decompression.

11-25

4890-10

3) HOLD (ESP is working) Mode

The Inlet valve and outlet valve will be closed to maintain the pressure in the hydraulic circuit applied at

the wheels. By closing the valves, the hydraulic pressure at the wheels will not be lost or supplied any

more. During ESP operation, the separation valve closes and only the shuttle valve at the pump opens.

11-26

4) RISE (ESP is working) Mode

The shuttle valve and inlet valve will be open and the separation valve and outlet valve will be closed.

Then, the pump is operated. When ESP operates while the ABS is operating, the pressure will be

increased continuously until just before the corresponding wheel gets locked.