SsangYong Stavic / SsangYong Rodius (2005 year). Manual - part 313

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Oil Pressure

Operating Pressure (p-A)

The inscribed gear type oil pump is installed into torque converter housing and is driven via the drive flange of the torque
converter.

The operating pressure produced from oil pump supplies oil pressure to mail line in hydraulic system to operate the
actuator. The operating pressure is the highest pressure in the hydraulic system. All other pressures are derived from it.

The operating pressure is regulated at the operating pressure control valve depending on load (modulating pressure) and
driving range (C1, C2 pressure). The spring in the operating pressure control valve adjusts a minimum pressure level
(base pressure).

1. Lubricating pressure control valve

2. Operating pressure control valve

3. One-way throttle valve

4. Shift valve pressure pressure control valve

5. Control valve pressure control valve

6. Shift pressure control valve

7. Oil pump

8. Drain

p-A. Operating pressure

Modulating pressure

control solenoid valve

Shift pressure control
solenoid valve

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Lubricating Pressure (p-SM)

This pressure limits the pressure in torque converter and lubricates and cools the mechanical transmission parts.

At the operating pressure control valve, excess fluid is diverted to the lubricating pressure control valve (1) and, from
there, regulated for transmission lubrication use (including torque converter).

Control Valve Pressure (p-RV)

The control valve pressure is set at the control pressure regulating valve (5) in relation to the operating pressure up to 8
bar.

This pressure supplies oil to modulating pressure (MP) solenoid valve, shift pressure (SP) solenoid valve, shift valve
pressure control valve (6).

Modulating Pressure (p-M)

The modulating pressure is adjusted at the modulating pressure control solenoid valve. The height of modulating pres-
sure is dependent on engine load by TCU. It acts on the operating pressure control valve and the pressure overlap control
valve. It increases the operating pressure (line pressure) when the load is heavy.

Shift Pressure (p-S)

The shift pressure is adjusted at the shift pressure control solenoid valve and shift pressure control valve (4). Additional
pressure from clutch C2 acts on the shift pressure control valve. As a result, the shift pressure in 2nd gear is reduced.

Shift Valve Pressure (p-SV)

The shift valve pressure converts the control valve pressure (p-RV) to shift valve pressure. Then it supplies oil to com-
mand valve, lockup solenoid valve, and shift pressure control solenoid valves.

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Shift Groups

The hydraulic control range (including shift elements), which is responsible for the pressure distribution before, during
and after a gear change, is designated a shift group.

The hydraulic system consists of 3 shift groups.

A shift group can be in two phases.

• Shift phase

• Stationary phase

In the shift phase, a change takes place in one shift group of the engaged clutch/brake. The other two shift groups are
then in the stationary phase.

Shift group C1/B1 (gear change 1-2/4-5) is responsible for the up/down shifts 1-2/2-1 and 4-5/5-4.

It includes:

• Clutch C1

• Brake B1

• Command valve

• Holding pressure shift valve

• 1-2/4-5 shift solenoid valve

• Pressure overlap control valve

• 1-2/4-5 shift solenoid valve

Shift group C2/C3 (gear change 2-3) is responsible for the up/down shifts 2-3/3-2.

It includes:

• Clutch C2

• Clutch C3

• Command valve

• Holding pressure shift valve

• 2-3 shift solenoid valve

• Pressure overlap control valve

• 2-3 shift solenoid valve

Shift group C3/B2 (gear change 3-4) is responsible for the up/down shifts 3-4/4-3 and the engagement process.

It includes:

• Clutch C3, 3-4 pressure overlap control valve

• Brake B2, 3-4 shift solenoid valve

• Brake B3

• Command valve

• Holding pressure shift valve

• 3-4 shift solenoid valve

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STRUCTURE OF ELECTRO-HYDRAULIC CONTROL MODULE (SHIFT PLATE)

3. Valve ball (steel)

4. Filter

1. Dowel pin

2. Valve ball (plastic)

Rear Section

A. Adjusting valve: Operating pressure, Lubricating

pressure, 2-3 group overlap

B. 1-2/4-5 shift group, control valve: Control valve

pressure, Shift valve pressure

C. 3-4 shift group

D. 2-3 shift group, Clutch lockup control valve, shift

valve B2

5. Plastic valve