Abstract:
The transmission device (1b) comprises an epicycloidal train (7) with a crown connected to the input (2ab) and a planetary wheel (9) prevented from turning in a reverse direction by an idler wheel (16). A satellite carrier (13) is connected to the output shaft (2bc). A crown (8) and the satellite carrier (13) may be coupled by means of a clutch (18b) actuated for engagement by means of fly-weights (29) and a spring (34) to achieve a direct drive. If the engagement is sufficient for the torque to be transmitted, the planetary wheel (9) has its speed reduced and is finally immobilized by means of the idler wheel (16). The device operates then as a reduction unit, and an axial thrust (Pac) due to helical teeth occurs and disengages the clutch. It is also possible to operate the device as a reduction unit by means of a piston (44) which pushes the race (20) in the direction of disengagement of the clutch (18b) and applies a brake (43) which prevents any rotation of the planetary wheel (9), even in the direction normally permitted by the idler wheel (16). Utilization for the selective operation of the transmission device as a reduction unit when the vehicle engine operates in a retaining mode.
Abstract:
The transmission is a mechanism, consisting of two dry friction clutches (11, 12), switched on by the centrifugal power of rotating weights (9) and five speed gear box. To the case of clutches is mounted a mechanism, which by moving the arms of a radial-axial bearing (13), redistributes the switch on power from the first (11) to the second (12) clutch and vice versa. The drive torque goes nonstop to the gear box. Its construction has two input shafts (14, 16), permanently engaged gear wheel couples, synchronizers (29, 24) clutches (30, 27, 25), and one output shaft (32). The aim of the invention is: on the base of the conventional manual transmission to create a five speed automatic transmission, where switching on the gears takes place without interrupting the drive torque, using a switching on mechanism with electronic control.
Abstract:
An epicyclic gear train (3, 4, 7) acts as a speed reducer gear between an input (1) and an output (2) when a clutch (14, 15) is released, and is in direct drive when the clutch is engaged. Selective engagement is provided by means of centrifugal fly weights (31) acting against return springs (29), and by the reaction of helical teeth (FAC), proportional to the torque transmitted during operation as a reducer gear. The reaction (FAC) stabilises the transmission ratio used and assists operation as a reducer gear when the torque to be transmitted is high. Means (120) are provided for applying an impulsional force to the flyweights (31) when the driver depresses the accelerator pedal (132). A pole face (127) of an electromagnet (123, 124, 126) then draws the flyweights in the direction corresponding to the release of the clutch to initiate and accelerate, if necessary, a return to operation as a reducer gear. For use in motor vehicles.