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AssigneeZF Friedrichshafen AG
InventorsWALTER FREI, GEORG GIERER, WOLFGANG RUNGE, HUBERT REMMLINGER, KARLHEINZ MAYR, WOLFGANG SCHMID, THILO SCHMIDT
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Pressure regulating valve comprising a connection for a pressure line (P), a connection for a working line (A), a connection for an outlet line (T) communicating with the ambient pressure and at least two diaphragm stages with defined or definable drag, the two diaphragm stages being connected to each other in a variable manner and subject to mechanical or hydraulic action according to the principle of the hydraulic half bridge. The two variable diaphragm stages are provided as the inlet and outlet diaphragms of a pressure regulating chamber (7) and each has a sealing element, said sealing element (5) of the inlet diaphragm (3) is designed as ball, or calotte, or truncated cone, or cylinder and/or the sealing element of the outlet diaphragm is designed as ball, or calotte, or truncated cone, or cylinder.
Pressure regulating valve having a connection for a pressure line (P), a connection for a working pressure line (A) and a connection for an outlet line (T) to the ambient pressure and with at least two diaphragm stages with defined or definable drag of which two diaphragm stages (109, 111) are connected with each other in variable manner and subject to mechanical or hydraulic action according to the principle of the hydraulic half bridge, characterized in that the two variable diaphragm stages are provided as inlet and outlet diaphragms of a pressure regulating chamber and each one has a sealing element, the sealing element of the inlet diaphragm being designed as ball, or calotte, or truncated cone, or cylinder and/or the sealing element of the outlet diaphragm being designed as ball, or calotte, or truncated cone, or cylinder.
Pressure regulating valve according to any one of the preceding claims, characterized in that it is used to regulate the hydraulic pressure for actuating transmission shifting elements.
Pressure regulating valve according to any one of the preceding claims, characterized in that the two variable diaphragm stages are lodged in one part wherein one diaphragm is designed as inlet diaphragm in a pressure regulating chamber (7) in the form of a hole through a valve housing (1), which hole can be covered with a sealing element and the other diaphragm is designed as outlet diaphragm in the form of a seat valve in which one axial wall surface (4) of the valve housing (1) covers a sealing surface (6) of a sealing element, particularly of an armature rod (10), and wherein a stud-shaped control shift valve (12) which abuts in axial direction on the armature rod (10), can push the sealing element of the inlet diaphragm out of its seat and thus connect the two diaphragms by, on one hand, establishing the inlet diaphragm cross section by covering the intake hole surface with the sealing element and, on the other, determining the outlet diaphragm surface by the spacing between the axial wall surface (4) and the sealing surface (6).
Pressure regulating valve according to any one of the preceding claims, characterized in that a cage (14) is provided for lodging the sealing element (5).
Pressure regulating valve according to any one of the preceding claims, characterized in that the sealing element is designed in one piece with the control shift valve (12).
Pressure regulating valve according to any one of the preceding claims, characterized in that both mechanically connected diaphragms are regulated by a control shift valve (12) which has a double-sided cone with a tapering in the center.
Pressure regulating valve according to any one of the preceding claims, characterized in that it can be magnetically actuated.
Pressure regulating valve according to any one of the preceding claims, characterized in that it can be piezo-electrically or pneumatically actuated.
Pressure regulating valve according to anyone of the preceding claims, characterized in that the two connected diaphragm stages (109, 111) are regulated diaphragms which are lodged in one part wherein one of the regulated diaphragms is designed as inlet diaphragm in a cylindrical pressure regulating chamber (7) in the form of at least one radial intake hole through a valve housing (1) and the other is designed as outlet diaphragm in the form of a seat valve in which an axial wall surface (4) of the valve housing (1) covers a sealing surface (6) of an armature rod (10) and wherein a control shift valve (12) consisting of one sleeve (105) and one connecting piece (8) to the armature rod (10) mechanically connected adjusts the two diaphragms by, on one hand, establishing the inlet diaphragm cross section by covering the intake hole surface with its sleeve surface and, on the other, by determining the outlet diaphragm surface by the spacing between the axial wall surface (4) and the sealing surface (6).
Pressure regulating valve according to anyone of the preceding claims, characterized in that its positioning force is applied by the force which an electromagnet exerts on the induced, magnetic torque of a soft-iron armature, the armature (13) being pressure upon the armature rod (10).
Pressure regulating valve according to any one of the preceding claims, characterized in that the armature rod (10) and the control shift valve (12) are designed in one piece.
Pressure regulating valve according to any one of the preceding claims, characterized in that the inlet diaphragm has in the valve housing (1) several radial intake holes which are connected via an annular duct with a front-mounted, fixed diaphragm as first diaphragm stage.
Pressure regulating valve according to anyone of the preceding claims, characterized in that the sealing surface (6) is provided on a front side of the armature rod (10).
Dependencies are inferred from the claim text.