Power plants – Pressure fluid source and motor – Condition responsive control of or by input to input pump...
Patent
1975-10-20
1976-10-19
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Condition responsive control of or by input to input pump...
604441, 604471, 60449, 60468, 60490, F16H 3946
Patent
active
039863573
ABSTRACT:
A control device for a driving unit which comprises an internal combustion engine and a hydrostatic vehicle transmission. The hydraulic adjusting members of the control unit are in response to a relief of pressure automatically by spring force moved to their starting position and are connected to a control circuit which is connectable to the pressure line of a constant delivery pump and is also by a control member connectable to a fluid return line for purposes of setting a control pressure. An adjustable measuring orifice of a limit load control is arranged in the above mentioned pressure line and, when looking in flow direction, is located ahead of the connection of the control member. The control member of the adjustable orifice is connected, for instance, to the gas pedal of the internal combustion engine. A check valve is arranged in a conduit extending from the limit load control to the control circuit of the hydrostatic transmission. In response to the setting of the control member to the maximum possible control pressure, the control circuit is in continuous communication with the return line through a predetermined throttling cross section.
REFERENCES:
patent: 3167907 (1965-02-01), Kempson
patent: 3214911 (1965-11-01), Kempson
patent: 3477225 (1969-11-01), Cryder et al.
patent: 3533234 (1970-10-01), Futamata et al.
Becker Walter
Geoghegan Edgar W.
Klockner-Humboldt-Deutz Aktiengesellschaft
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