Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1987-03-26
1988-05-24
Miller, Carl S.
Internal-combustion engines
Charge forming device
Fuel injection system
123456, 123459, F02M 3900
Patent
active
047459034
ABSTRACT:
A pressure regulating valve is proposed which serves to regulate a constant pressure of a medium. The pressure regulating valve includes a valve housing and a regulating piston, which is supported in a slide bore such that it is displaceable by the pressure of the medium counter to the force of a regulating spring. The regulating piston includes a valve closing element that cooperates with a valve seat and a regulating face that upon a displacement movement of the regulating piston that is longer than a predetermined displacement path (s) opens an outflow opening in the valve housing. A bypass conduit is provided in the regulating piston, beginning at one end at the regulating face and terminating at the other in a relief opening disposed in a circumferential wall of the regulating piston. Upon a displacement of the regulating piston, the relief opening communicates with the outflow opening only whenever the displacement path of the regulating piston away from the valve seat is shorter than the predetermined displacement path (s). To attain a rapid closing movement of the regulating piston and to lower the regulated pressure, the medium can flow out via the bypass conduit during the closing movement.
REFERENCES:
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patent: 4549515 (1985-10-01), Maisch
patent: 4621604 (1986-11-01), Abthoff
Greigg Edwin E.
Miller Carl S.
Robert & Bosch GmbH
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