SSANGYONG NEW ACTYON SPORTS 2013 Service Manual

12-22
2. SYSTEM LAYOUT
The steering pump is driven by the engine power through a belt. This pump circulates the power steering
oil from the reservoir -> steering pump -> oil supply pipe -> steering gear box -> oil return pipe ->
reservoir to perform steering operations
Return hose & tube
Steering pump &
reservoir
High pressure hose
Linkage gear box Steering wheel
Lower shaft Column & shaft
Return hose & tube
Steering pump &
reservoir
High pressure hose
Linkage gear box Steering wheel
Lower shaft Column & shaft
HPS model
SSPS model

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Oil Flows during Right Turn ▶
Steering pumpTo piston pipe
in
From piston pipePiston pipe
Piston
Oil reservoir

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1. SPECIFICATIONS
Item Item Specification
SSPS solenoid valveRated voltage DC 12 V
Rated voltage 1.0 A
Resistance6.7 ±1 Ω
Power steering oil pump
(with SSPS)Operating temperature-40℃~150℃
Release pressure 90 bar
Displacement 9.3 cc/rev
Flow velocity 9.75~6 l/mn
Pulley sizeØ115
Pulley type 6 groove
Housing material Aluminium
Power steering fluid reservoir
(with SSPS)Fracture pressuremin 8kgf/㎠
Air leakage2 kgf/㎠×min
Cap open torque 9.8 to 14.2 Nm
Oil capacity FULL 550cc
Power steering gear box
(with SSPS)Gear type Rack & pinion type
Gear ratio 40.245
Fixed rack 3.78
Gear weight 12.800 kg
Steering angleInner36.2°
Outer32.4°

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1. OVERVIEW
The speed-sensitive power-assisted steering system can automatically adjust the boosts according to
the speed changes, automatically induct the high-speed or low-speed status, and relatively adjust the
reasonable steering boosts, enhance the operation precision, reduce the driving pressure of drivers. No
matter for steering, parking or reversing, it becomes much easier. The adjustable safety steering column
attached possesses the functions of electrically adjusting height and transverse position, has brought
much more abundant and comfortable spaces for legs, and has provided the great convenience to get in
or out the car.
The Speed Sensitive Power Steering (SSPS) unit controls the SSPS solenoid vale in steering gear box
to get proper power steering force.

13-6
Power steering gearbox &
solenoid valve for SSPS model
SSPS control unit
Installed view Unit components
It is installed at the bottom of the ECU inside the passenger's floor mat
foot protector cover and receives data related to the vehicle speed and
throttle position through the CAN communication and controls the
solenoid valves to obtain optimal steering force.
SSPS Solenoid Valve
Tie Rod End
Tie Rod
Bellows
SSPS Solenoid Valve
Valve Assembly
Feed Tube
Mounting Bracket
Cylinder Tube
Rack Housing
Adjusting Plug 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
2. LAYOUT

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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

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▶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.

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▶ 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.