Abstract: Transmission for motor vehicles, more particularly a transmission which is provided with a reversing unit making use of a planetary coupling (1), whereby said planetary coupling (1) consists of a first shaft (2), a planetary support (3) mounted on this first shaft (2), planet wheels (4,5) mounted on this planetary support (3), a sun wheel (6) co-operating with the planet wheels (4,5), a second shaft (7) coupled to the sun wheel (6) and a ring wheel (8) co-operating with the planet wheels (4,5), and wherein the planetary support (3) and the ring wheel (8) of the planetary transmission (1) are provide of means which allow that, upon choice, either the ring wheel (8) can be locked against rotation or the planetary support (3) can be coupled to the sun wheel (6), characterized in that at least one bearing (9) is provided between the ring wheel (8) and the planetary support (3) which provides in a radial bearing between the ring wheel (8) and the planetary support (3), and in that said bearing (9) and the planet w

Abstract: Transmission unit consisting of a continuously variable transmission (1); a hydraulic cylinder/piston unit (3) to set the transmission ratio of the continuously variable transmission (2); a pressure compensation chamber (4) working in conjunction with the cylinder/piston unit (3); and a passage organ (5) having at least one passage way (6) connecting the pressure compensation chamber (4) with the piston chamber (7) of said cylinder/piston unit (3), characterized in that the passage way (6) stretches at least partially along the outer surface of the passage organ (5).

Abstract: A method for regulating an automatic transmission unit having a plurality of coupling devices includes supplying a hydraulic medium to a control element; and supplying at least a portion of the hydraulic medium to a hydraulic regulating valve. The control element determines the portion of the hydraulic medium supplied to the hydraulic regulating valve and supplies that portion to the hydraulic regulating valve. The hydraulic regulating valve regulates an operational function of one of the coupling devices. When the central element fails, a safety device regulates the operational function of one of the coupling devices as a function of the revolution speed of a shaft of an engine.

Abstract: Device for the regulation of a continuously variable transmission in motor vehicles, characterized in that it mainly consists of means for the supply of a hydraulic medium under pressure; control means for the regulation of a pressure; and a controller (13) formed of on the one hand a main valve (14) for the supply and discharge of the hydraulic medium to the regulating cylinder (8) of the continuously variable transmission (1), and on the other hand a control valve (15), whereby the valve bodies (16, 17) of the main valve (14) and the control valve (15) cooperate by means of elastic means, whereby the valve body (16) of the main valve (14) is loaded by a pressure regulated by the control valve (15) and whereby the valve body (17) of the control valve (15) is loaded by a pressure set by means of the above-mentioned control valves.

Abstract: Device for the regulation of an automatic transmission unit, in particular a transmission unit composed of a torque converter, a foreward coupling, a reverse coupling and a continuously variable transmission, characterized in that this device consists of a pump; a first regulating valve for the regulation of the continuously variable transmission; a second regulating valve with which a hydraulic medium for the torque converter can be controlled; a cut-off valve; and control means which supply a regulating pressure which can provide in the control of both the cut-off valve and the second regulating valve.