SsangYong Actyon Sports II. Manual — part 158
11-27
4890-10
5) Hydraulic Circuit of HBA
The above figure shows one front and one rear wheel and the same hydraulic circuit forms as in the
ESP operation. When HECU recognizes that it is an emergency and it is required for hard braking,
depending on the pressure value of the brake pressure sensor and pressure changes caused by the
pressure sensor timing, it operates the pump immediately to apply the brake pressure at the wheels.
Then, the pressure in the pump increases until just before the corresponding wheel gets locked. The
motor still keeps rotating and the outlet valve and the separation valve will stay closed. When the wheel
starts to lock, the HBA function cancels and switches to ABS operation.
11-28
8. CIRCUIT DIAGRAM
11-29
4890-10
Only ESP
12-3
4610-01
1. SPECIFICATIONS
Description
Specification
Steering wheel
Type
4-spoke type
Gear box
(HPS)
Type
Rack and pinion type
Gear ratio
40.245
Steering angle
Inner
36.2˚
Outer
32.4˚
Oil pump
(HPS)
Type
Vane type
Maximum pressure (kgf/cm2)
90 ± 3
Pulley size (mm)
Ø115
Operating temperature
-40℃~150℃
Minimum turning radius
(m)
5.8
Steering oil
Type
S-PSF-3
Capacity (L)
Approx. 1.0
Service interval
Daily check and add if necessary.
Steering column shaft
Tilting angle
-4.0/ 0° /+4.0° / +8.0°
This section describes the power steering pump and gear box based on the HPS (Hydraulic Power
Steering) system. For the information of the SSPS (Speed Sensing Power Steering) system, refer to
SSPS section under CHASSIS.
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