Lockup Clutch - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

3A1-20

LOCKUP CLUTCH

1. Impeller wheel
2. Turbine wheel
3. Stator wheel
4. Stator shaft
5. Multiple disc clutch drum
6. Multiple disc clutch hub
7. Converter cover
8. One-way clutch
9. Input shaft
Lockup clutch consists of multiple disc clutches as shown
in the figure and is activated in 3th, 4th and 5th gears. The
aim of using torque converter lockup clutch is to reduce
the fuel consumption and exhaust gas emissions of the
vehicle by reducing torque converter slip. This stands in
contradiction to the ride comfort demands made on the
drive train with regard to its vibration behaviors. The task of
the electronic transmission control is therefore to close
the clutch in all driving situations relevant to fuel
consumption, if possible, and ensure that the engine vi-
brations are isolated from the drive train.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
10. Multiple disc clutch pack
11. Piston
A : Closed (lockup clutch activates)
B : Slipping
C : Open (lockup clutch deactivates)
n : Transmission output speed
d : Accelerator pedal position
The characteristic curves shown in the diagram illustrate
the different operating states of the torque converter lockup
clutch in relation to the accelerator pedal position and the
transmission output speed, plotted for one transmission
gear.
• Variables influencing the states of the torque converter
lockup clutch:
1. Accelerator pedal movement
2. Uphill and downhill gradients
3. Transmission shift functions
4. Transmission oil temperature
5. Load conditions
6. Engine control influences
DC 5-SPEED AUTOMATIC TRANSMISSION
Y220_3A1018
REXTON SM - 2004.4