Control system for hydrostatic transmissions

Details Control system for hydrostatic transmissions Control system for hydrostatic transmissions

1977-08-26

1979-04-17

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60447, 60464, 60494, F16H 3946

Patent

active

041493800

ABSTRACT:
The control system for a hydraulic transmission comprises a throttle element which consists of a constant throttle and a spring charged adjustable throttle arranged in parallel or, alternatively, comprises a combination of a constant throttle with adjustable throttles. The adjustable throttle has a cross section varying in response to the operating pressure of the hydrostatic transmission. The moment of rotation of a hydrometer included in the transmission is determined by the fluid stream caused by an adjustable pump which is adjusted by a servomechanism controlled by the throttle element and thus forms a transmission control member.

REFERENCES:
patent: 3214911 (1965-11-01), Kempson
patent: 3650108 (1972-03-01), Isaac
patent: 3850272 (1974-11-01), Reinecke et al.

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