Cone disk transmission, especially for motor vehicles

Details Cone disk transmission, especially for motor vehicles Cone disk transmission, especially for motor vehicles

1990-05-16

1991-09-03

Lorence, Richard

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Load responsive

474 19, 474 21, 475211, F16H 918, F16H 926, F16H 5914

Patent

active

050450280

ABSTRACT:
A cone disk transmission, particularly for motor vehicles, has an infinitely settable and variable ratio. The transmission uses two pairs of cone disks (2, 3), connected by a coupling belt or chain (24). On cone disk of each pair is axially displaceable, and selectively positionable against the traction element running between the cone pairs by a hydraulic positioning system, for generating engagement or gripping or clamping forces. The positioning pressure is controlled by pressure fluid derived from a spool valve (10). Torque sensors (16, 17) located on the transmission shafts throttle return flow of hydraulic pressure fluid from the control valve, as a function of load. In accordance with the invention, the torque sensors are immediately activated as a function of the intended operating state of the transmission, that is, the direction of transfer of power between the pairs of cone disks, by coupling both of the torque sensors to a transfer valve (FIG. 1: 19) operated by a clutch engagement pressure, or to the spool valve in parallel (FIG. 2), in series (FIG. 3) or cross-connected directly (FIG. 4) from a 2-return pressure line spool valve (88).

REFERENCES:
patent: 3052132 (1962-09-01), Dittrich et al.
patent: 3600960 (1971-08-01), Karig et al.
patent: 3875814 (1975-04-01), Steuer
patent: 4116080 (1978-09-01), Berens
patent: 4360353 (1982-11-01), Hattori et al.
patent: 4599916 (1986-07-01), Hirosawa
patent: 4644820 (1987-02-01), Macey et al.
patent: 4913684 (1990-04-01), Mantovaara et al.
patent: 4942786 (1990-07-01), Dittrich

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