Control system for power train and auxiliary equipment driven fr

Details Control system for power train and auxiliary equipment driven fr Control system for power train and auxiliary equipment driven fr

1976-04-12

1977-04-05

Geoghegan, Edgar W.

Machine element or mechanism

Power take-off

Intermediate ends of power transmitting line

74664, 192 333, 60435, 60437, 60484, 60DIG2, F16H 3700

Patent

active

040154823

ABSTRACT:
A control system for an engine driven power train having a variable torque absorption transmission mechanism typically including a torque converter, in conjunction with a hydraulic control circuit for the implement of an excavating-loading vehicle such as a loader. The control circuit comprises lift and tilt cylinder means connected via respective control valves to a pump driven by the vehicle engine. The pump also communicates with the transmission mechanism via a variable pressure regulator valve which functions to condition the transmission mechanism for a relatively high torque absorption characteristic during vehicle propelling operation so that engine torque may be efficiently transmitted to the drive wheels of the vehicle. When either of the control valves is actuated for raising or tilting back the bucket of the loader, the transmission mechanism is automatically conditioned for a relatively low torque absorption characteristic so that the pump may be driven without any substantial decrease in engine speed.

REFERENCES:
patent: 3241694 (1966-03-01), Pedersen
patent: 3424029 (1969-01-01), Horsch et al.
patent: 3583243 (1971-06-01), Wilson
patent: 3822770 (1974-07-01), Golan
patent: 3822771 (1974-07-01), Audiffred et al.
patent: 3831726 (1974-08-01), Woody et al.

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