SSANGYONG KYRON 2010.01 Manual page 600

01-52
3410-01
(1) Power flow - Drive 4 (Overdrive)
In Drive 4 (Overdrive), transmission drive is via the input shaft to the forward clutch cylinder.
The elements of the transmission function as follows :
- The C1 clutch is applied to drive the planet carrier clockwise.
- The B1 band is applied to hold the reverse sun gear stationary.
- As the planet carrier tuns, the long pinion walks around the stationary reverse sun gear and
rotates around its axis driving the internal ring gear and output shaft in a clockwise or
forward direction at a speed faster than the input shaft i.e. in overdrive ratio.
- The forward sun gear is also driven faster than the input shaft and overruns the 3-4 OWC.
- The C2 clutch is engaged to reduce the speed differential across the 3-4 OWC.
(2) Control
To maintain this arrangement in the steady state solenoids and valves are activated as
follows :
- Solenoid S1 is switched ON. S2 is switched OFF.
- With S1 switched ON, the 3-4 shift valve is held in the fourth gear position by line 500
pressure on the small end of the valve.
- With S2 switched OFF, the 2-3 shift valve is held in the fourth gear position by line 500
pressure on the large end of the valve.
- The 1-2 shift valve is held in the fourth gear position by S2 oil pressure.
- 2nd oil (line pressure) from the 1-2 shift valve is directed to the band apply feed regulator
valve, and to the 2-3 shift valve.
- The band apply feed regulator valve supplies 2nd oil (regulated to line pressure multiplied
by the valve ra-tio) to the Band Apply Feed (BAF) circuit.
- Band apply feed oil is directed to
the outer apply area of the front servo
·
the inner apply area of the front servo piston via the 3-4 shift valve
·
· the 1-2 shift valve to provide an exhaust port when the transmission is shifted to first gear
- 2nd oil at the 2-3 shift valve is directed to the 3rd oil circuit.
- 3rd oil from the 2-3 shift valve is directed to the clutch apply regulator valve, and to the 4-3
sequence valve.
- The clutch apply regulator valve supplies oil (regulated to line 500 pressure multiplied by
the valve ratio) to the Clutch Apply Feed (CAF) circuit.
-
The CAF oil is directed to
The C1clutch
·
The 4-3 sequence valve
·
- Drive oil (line pressure) from the manual valve engages the C2 clutch.
ION 4-SPEED
KYRON 2010.01