Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1998-07-10
2000-02-22
Hepperle, Stephen M.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137599, 192 358, 192 8713, G05D 1103
Patent
active
060268409
ABSTRACT:
A hydraulic control system for connecting elements, which is particularly applicable for an externally engaged clutch on an engine, comprises a pump for producing an oil stream, a distributing valve for determining the flow path of the oil stream, a throttle serving as a metering orifice and inserted in a flow path causing a pressure gradient in the oil stream, a regulating valve connected by supply and return pipes to the flow path of the first throttle upstream and downstream of the throttle, which has a regulating piston acted upon by the higher oil pressure and displaceable against a spring force, a control groove provided on the regulating piston which operates by a ring groove arranged between the piston chamber and the regulating valve with clutch pipe and tank pipes, a second throttle serving as a time orifice and inserted in an output pipe proceeding from the end region of a spring chamber towards the return pipe and adjustable to the closing time of the clutch and a pressure relief output which proceeds from the spring chamber at a distance in front of the output pipe, is connected to the return pipe and can be shut off by the regulating piston on a short stroke.
REFERENCES:
patent: 3656496 (1972-04-01), Uenoyama
patent: 3948147 (1976-04-01), Sauer et al.
patent: 4240457 (1980-12-01), Riediger
patent: 4682531 (1987-07-01), Mayer
Franke Helmut
Rhody Karl-Thomas
Claas Industrietechnik GmbH
Hepperle Stephen M.
Muir Robert E.
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