SsangYong Actyon Sports II. Manual — part 165

13-7

4620-01

SSPS warning lamp

Comes on when SSPS system has a fault

Power steering supply hose and return hose for

SSPS model

Power steering pump with SSPS

Installed view

Pump components

13-8

3. HOW TO OPERATE

1) Input/Output of SSPS Control Unit

Meter Cluster

(Vehicle Speed)

SSPS

Control

Unit

Solenoid Valve

Meter cluster

(SSPS warning lamp)

Trouble Diagnosis

2) SSPS Configuration

Ground

IG Power

13-9

4620-01

▶Components

PCV (Pressure Control Valve)

This valve controls the hydraulic pressure supplied to reaction device by moving the spool valve

according to the changes of solenoid valve.

Reaction device

This device increases the steerability effect by binding the input shaft with supplied hydraulic pressure

from PCV.

Solenoid valve

This valve determines the valve spool position in PCV with the electric current supplied from ECPS

control unit.

1.

2.

3.

3) Operation of Solenoid Valve

SSPS control unit controls the current to solenoid valve according to the vehicle speed. Based on this

current, the solenoid valve changes the position of valve spool to control the hydraulic pressure to the

reaction plunger. Accordingly, the SSPS system can get the desired steering force according to the

vehicle speed.

▶During parking and low speed driving

SSPS control unit outputs nearly maximum electrical current.

The solenoid rod pushes PCV spool to right side.

The hydraulic pressure coming from pump is not supplied to the reaction device as the spool

orifice is cut off.

The hydraulic pressure is cut off and the manipulation of steering wheel becomes lighter.

1.

2.

3.

4.

13-10

▶ In medium and high speed driving

The shaft operation force of solenoid rod is reduced due to the reduction of output current from SSPS

control unit.

The coil spring pulls the PCV spool toward solenoid valve to open it.

The hydraulic pressure from pump flows to pinion reaction area through orifice and applies reaction

force to reaction plunger.

At this time, the reaction plunger transmits the reaction force to V-groove in input shaft to provide heavy

steerability.

1.

2.

3.

4.