US 6,729,600 B2Granted

Valve for regulating fluids

AssigneeRobert Bosch GmbH

InventorsPatrick Mattes, Wolfgang Stoecklein, Dietmar Schmieder

Life of this patent

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Abstract

A valve for regulating fluids includes a piezo-electric actor unit (9) for operating a valve member assembly. The valve member assembly has at least one first piston (13) guided in a valve body (10) and a second piston (14). A hydraulic chamber, acting as a hydraulic converter, is disposed between the first and second pistons (13, 14). The second piston operates a valve-closing member (15) disposed on an end facing away from the hydraulic chamber (16). The valve closing member (15) cooperates with at least one valve seat (17) formed on the valve body (10) and in a closed position, separates a system pressure region (18) of the valve (1) from a high pressure region (5). The second piston (14) is surrounded by and supported by an approximately casing-type spacer (22) on the valve body (10).

Claims8

Dependent claims

Valve for regulating fluids, comprising:

a piezo-electric actor unit (9) for operating a valve member assembly, said valve member assembly having a first piston (13) guided in a valve body (10) and a second piston (14), wherein a hydraulic chamber (16) acting as a hydraulic converter is disposed between said first and second pistons (13, 14), wherein the second piston operates a valve closing member (15) on an end of said second piston (14) facing away from the hydraulic chamber (16), wherein said valve closing member (15) cooperates with at least one valve seat (17) formed on the valve body (10) and in a closed position, said valve closing member (15) separates a system pressure region (18) from a high pressure region (5), wherein the second piston(14) in a direction of the hydraulic chamber (16) is surrounded by and supported by means of casing-type spacer (22) on the valve body (10).

Dependencies are inferred from the claim text.

Facts

Application: 10/216,935Filed 12 Aug 2002
Priority: DE 101 39 85714 Aug 2001
Published: US 2003/0034466 A120 Feb 2003
Granted: 4 May 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F02M 63/0026
Electrical, e.g. using solenoid: using piezoelectric or magnetostrictive actuators
F02M 45/04
With each cyclic delivery being separated into two or more parts: with a small initial part , e.g. initial part for partial load and initial and…
F02M 47/027
Of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close,…:…
F02M 63/0036
Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat: with spherical or partly spherical shaped valve…