A method and system for controlling creep in an automatic transmission, comprising
a first creep torque control means which, upon generation of an accelerator- and
brake-pedal undepressed state in a running mode, generates a target creep speed,
the target creep speed increasing as a function of time and settling to a predetermined
value, the first creep torque control means then calculating a creep torque from
the target creep speed, detecting a change in vehicle load from a speed deviation,
correcting a target creep torque on the basis of the detected change in vehicle
load, and controlling the engine torque on the basis of the correction, and a second
creep torque control means which controls a transfer torque of a starting clutch
(a first friction clutch) on the basis of a slipping speed of the starting clutch
and the target creep torque, the creep controlling method and system being able
to realize a stable creep running even against a change in running environment
such as the existence of a slope or an increase of payload while suppressing wear
and heat generation of the friction clutch.
