Patent ID: 6885929

Claim:
A control method for an automatic transmission ( 1 ) in which a first control system of automatic type ( 22 ) receives as input data signals and processes them in order to generate drive signals (OPEN/CLOSE, SEL, ENG/DIS) for the transmission and automatically to set an optimum transmission ratio, this automatic transmission ( 1 ) further comprising a second control system ( 24 ) of manual type which receives as input control signals generated ( 17 ) by an operator in order to generate drive signals (OPEN/CLOSE, SEL, ENG/DIS) for the transmission and manually to set a transmission ratio, characterised in that it comprises the stages of: activating ( 100 ) the first control system ( 22 ) and automatically setting a transmission ratio, detecting the presence ( 110 ) of a manual command from an operator to modify the transmission ratio in use, performing ( 130 ) the manual command from the operator by modifying the transmission ratio set automatically, silencing ( 130 ) the first control system ( 22 ) for a predetermined time interval (Tsleep) such that the transmission ratio set following the manual command is not modified as a result of an automatic gear change request from the first control system ( 22 ), attributing ( 100 ) the control of the automatic transmission to the first control system ( 22 ).