Hydraulic nonstep transmission apparatus

Details Hydraulic nonstep transmission apparatus Hydraulic nonstep transmission apparatus

1993-05-27

1995-06-20

Lopez, F. Daniel

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60468, 60489, F16D 3102

Patent

active

054252385

ABSTRACT:
A hydraulic nonstep transmission apparatus with low costs and high reliability is provided which is capable of automatically determining a speed-change ratio corresponding to engine speed and motor load and capable of smoothly performing clutch operation to a clutch-on state through a clutch meeting state. The apparatus comprises: a clutch means provided in a hydraulic closed circuit; a governor hydraulic actuator for moving the motor swash plate toward its vertical position in accordance with an increase in the rotational speed of an engine; and a governor hydraulic pressure switch means provided in a governor hydraulic fluid passage of the governor hydraulic actuator and drivingly connected to the clutch means to disconnect the governor hydraulic pressure during the period from a clutch-off state to the elapse of the clutch meeting state and to supply the governor hydraulic pressure before and after the transition to clutch-on after substantially completing the clutch meeting state.

REFERENCES:
patent: 3364679 (1968-01-01), Osojnak
patent: 3986357 (1976-10-01), Hoffmann
patent: 4495767 (1985-01-01), Akiyama et al.

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