Importance

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Abstract

An automatic transmission having at the input a starting element (4), a reversing set (46), a first electronic control unit (65) and a cone pulley (29) fixedly supported on one primary shaft (18) and axially thereto a hydraulically adjustable cone pulley (30), both pulleys forming a primary variator part (19). In addition there is a cone pulley (31) fixedly supported on a secondary shaft (21) and axially thereto a hydraulically adjustable cone pulley (32) together forming a secondary variator part (20) wherein a belt-type organ (37) between the cone pulleys (29, 30, 31,32) drivingly connects the primary variator part (19) with the secondary variator part (20). The starting element (4) is a dry running disc clutch whose disc is non-rotatably connected with the primary shaft (18) and interacts in a clutch housing (14) with a non-rotatably but axially movably disposed pressure plate (7) actuated via axial bearings (9) by a non-rotating actuator (10, 11), the clutch housing (14) being non-rotatably connected with an input shaft (2) of a prime mover (1). The purpose is to reduce the rotating masses and to improve the adjustment of the variator (19, 20).

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First Claim