SSANGYONG KYRON 2007.04 Manual page 582

01-18
3410-01
Solenoid valve symbols (ON/OFF solenoids)
▶
The solenoid symbol shown adjacent to each solenoid on the hydraulic system schematics
indicates the state of the oil flow through the solenoid valve with the power ON or OFF.
▶ Normally open (NO) solenoid
POWER ON: Line 500 port is closed. The output port is open to exhaust at the solenoid valve.
POWER OFF: The exhaust port is closed. The output port is open to line 500.
▶ Variable pressure solenoid multiplexing system
Friction element shifting pressures are controlled by the Variable Pressure Solenoid (VPS).
Line pressure is completely independent of shift pressure and is a function of throttle position,
gear state and engine speed.
S5 is a proportional or variable pressure solenoid that provides the signal pressure to the clutch
and band regulator valves thereby controlling shift pressures.
VPS pressure is multiplexed to the clutch regulator valve, the band regulator valve and the
converter clutch regulator valve during automatic gearshifts.
A variable pressure solenoid produces a hydraulic pressure inversely proportional to the
current applied. During a gearshift the TCU applies a progressively increasing or decreasing
(ramped) current to the solenoid. Current applied will vary between a minimum oaf 200 mA and
a maximum of 1000 mA. Increasing current decreases output (S5) pressure. Decreasing
current increases output (S5) pressure.
Line 500 pressure, (approximately 440 to 560 kPa), is the reference pressure for the VPS, and
the VPS output pressure is always below line 500 pressure.
ION 4-SPEED
KYRON 2007.04