Alfa Romeo 166 Booklet page 100

CONSTRUCTIONAL FEATURES
The Sportronic gearbox is fully automat-
ic with electrohydraulic control and four
forward gears plus reverse (3.0 V6 24V
version) and five forward gears plus re-
verse (JTD 20V Multijet version).
It is controlled by an electronic control
unit which handles:
– the torque distributor
– gearshifting
– specific programmes
The gearbox is coupled with a fluid pow-
er torque distributor with piloted antislip
device which makes it possible to obtain
demultiplication ratios.
The particularity of this gearbox which
works without idle gear enables:
– higher compactness and weight re-
duction
– improved output due to less friction
– lower stress of transmission parts
100
GENERAL FEATURES
Electronic gearbox management makes
it possible to obtain gearshifting suited to
momentary engine characteristics with a
certain elasticity.
The electronic control unit has the task
of:
– adapting the oil pressure for gearshift-
ing to the engine torque
– activating safety functions
– defining the manual gearshifting pro-
gramme
– system diagnostics.
For controlling these operating logics the
control unit uses the following signals:
– engine rpm
– throttle position
– engine temperature
– turbine rpm
– vehicle speed
– gearbox oil temperature
– gearshift selector lever position
– accelerator pedal position (kickdown)
– brake pedal position
In addition the control unit converses
with the electronic control units of the ABS,
injection-ignition, VDC and Cruise Control.