초록 ▼

A method for operating an automatic traction drive transmission for use in motor vehicles having a first gear unit for operation in an infinitely variable mode and a second gear unit for operation in a continuously variable mode includes connecting the first gear unit to the transmission output, dis

A method for operating an automatic traction drive transmission for use in motor vehicles having a first gear unit for operation in an infinitely variable mode and a second gear unit for operation in a continuously variable mode includes connecting the first gear unit to the transmission output, disconnecting the second gear unit from the first gear unit, and changing the speed ratio of the variator to produce low forward and low reverse ranges, or connecting the second gear unit to the first gear unit, disconnecting the first gear unit from the transmission output, and changing the speed ratio of the variator to produce high mode low and high forward ranges.

대표청구항 ▼

[ We claim:] [1.] A method for controlling operation of a transmission of a motor vehicle, the transmission having a traction drive variator driveably connected to a transmission input, a first epicyclic gear unit driveably connected to the transmission input and variator output, a second epicyclic

[ We claim:] [1.] A method for controlling operation of a transmission of a motor vehicle, the transmission having a traction drive variator driveably connected to a transmission input, a first epicyclic gear unit driveably connected to the transmission input and variator output, a second epicyclic gear unit, the method comprising the steps of:driveably connecting the first epicyclic gear unit and the transmission output;driveably disconnecting the first epicyclic gear unit from the second epicyclic gear unit;operating the variator to overdrive the variator output with respect to the speed of the transmission input such that the transmission output drives the vehicle in a rearward direction; andoperating the variator to underdrive the variator output with respect to the speed of the transmission input such that the transmission output drives the vehicle in a forward direction.