SSANGYONG KYRON 2010.01 Manual page 638

- Transferring a higher engine power, this is allowed by the mechanical in-gear strength of the
transmission
Real-time control of engine torque is required to maintain maximum shift quality and
transmission durability. The TCU has the ability to control the engine torque during the gearshift
to synchronise with the operation of the transmission clutches.
▶ Pressure Modulation
To provide a high level of shift comfort and durability, the hydraulic pressure in the shift related
friction elements of the transmission must be matched accurately to the transmission input
torque. This hydraulic pressure is composed of a hydraulically pre-set basic pressure and a
controlling pressure which is set by one of the variable bleed solenoids.
The transmission input torque can be directly calculated from the following operating
parameters: engine torque signals, engine speed or any signals transmitted from the engine
management ECU by CAN, and converter slip. Separate pressure characteristics for each gear
change make it possible to adapt precisely to the particular shift operation.
High and Low range operation has different parameters to optimise shift quality.
4) Shift Map Selection
The driver can manually select between normal (S) and winter modes (W) via the mode switch.
Depending on the transmission temperature, uphill and downhill grades and altitude, shift maps
will be selected by the TCU to suit the driving conditions. The following maps are available.
▶ Normal Mode
Normal Mode is selected when the lever is in the D position with the mode switch in the normal
(S) position and the transmission is within normal temperature ranges. Shift schedule points are
optimised for fuel efficiency and general driving conditions.
▶ Uphill and Downhill Mode
In this mode, depending on the load of the vehicle, adaptive shift maps are selected to
progressively adjust the shift points and torque converter lock points.
▶ Altitude Mode
Shift points are automatically adjusted at higher altitudes to compensate for changes in engine
torque where the torque produced by the engine is greatly reduced by the effects of reduced
barometric pressure and temperature.
▶ Winter Mode
When winter mode is selected, starting in second gear is facilitated and the WINTER mode
indicator light is switched ON. To prevent wheel spin on slippery surfaces, the transmission will
not allow first gear unless manually overridden.
03-17
3650-01
DSI M78 6-SPEED A/T
KYRON 2010.01