Pressure regulating valve with pressure transmission pin

Patent metadata

Field	Value
Publication number	US-10544877-B2
Application number	US-201815909343-A
Country	US
Kind code	B2
Filing date	Mar 1, 2018
Priority date	Mar 1, 2017
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

A pressure regulating valve includes a housing, control slide valve, coupling rod, armature, outlet port, and pressure transmission pin. The armature demarcates a first fluid space and a second fluid space from each other. The rod extends with a constant first outer cross-sectional shape in a direction of a longitudinal axis, and at least partially demarcates a third fluid space that fluidically connects the first fluid space to the outlet port. The pin extends with a constant second outer cross-sectional shape in the direction of the longitudinal axis, and at least partially delimits the third fluid space. The pin is positioned so that one end facing toward the armature projects into the control slide valve, and another end facing away from the armature is at least indirectly supported against the housing. A hydraulically effective area of the second shape is larger than a hydraulically effective area of the first shape.

First claim

What is claimed is:

1. A pressure regulating valve, comprising:
a housing including:
an inflow port;
a return flow port; and
an outlet port;

a control slide valve positioned in the housing and movable along a direction of a longitudinal axis, the control slide valve and the housing together forming a first orifice and a second orifice that each have a cross-sectional area that is adjustable in opposite directions via movement of the control slide valve, wherein:
the inflow port is fluidically connected to the outlet port via the first orifice; and
the return flow port is fluidically connected to the outlet port via the second orifice;

a pole tube;
an armature that is positioned in the pole tube and movable along the direction of the longitudinal axis, and that demarcates a first fluid space and a second fluid space from each other within the pole tube such that the first fluid space and the second fluid space each have a volume that is adjustable in opposite directions via displacement of the armature;
a coupling rod that extends with a constant first outer cross-sectional shape in the direction of the longitudinal axis, and that motionally couples the armature with the control slide valve, wherein:
at least inner sections of the coupling rod and the control slide valve together at least partially delimit a third fluid space that extends in the direction of the longitudinal axis; and
the third fluid space fluidically connects the first fluid space to the outlet port; and

a pressure transmission pin that extends with a constant second outer cross-sectional shape in the direction of the longitudinal axis, and that includes:
a first end facing toward the armature and projecting into the control slide valve; and
a second end facing away from the armature and positioned so that the pressure transmission pin is at least indirectly supported against the housing;

wherein a hydraulically effective area of the second outer cross-sectional shape is larger than a hydraulically effective area of the first outer cross-sectional shape.

2. The pressure regulating valve of claim 1 , wherein the control slide valve is configured such that a hydraulic force exerted on the control slide valve at the inflow port in the direction of the longitudinal axis is zero.

3. The pressure regulating valve of claim 1 , wherein the control slide valve is configured such that a hydraulic force exerted on the control slide valve at the return flow port in the direction of the longitudinal axis is approximately zero.

4. The pressure regulating valve of claim 1 , wherein the control slide valve, the coupling rod, and the armature are configured such that a pressure at the outlet port acts in the direction of the longitudinal axis on an effective area defined by a difference in area between the first outer cross-sectional shape and the second outer cross-sectional shape.

5. The pressure regulating valve of claim 1 , wherein movement of the control slide valve toward the pole tube causes a free cross-sectional area of the first orifice to decrease.

6. The pressure regulating valve of claim 1 , wherein the coupling rod and the control slide valve are separate elements that are fixedly connected to each other.

7. The pressure regulating valve of claim 1 , wherein the pole tube and the housing are separate elements that are fixedly connected to each other.

8. The pressure regulating valve of claim 1 , wherein:
the control slide valve includes a connecting duct;
the control slide valve and the housing together delimit a forth fluid space having a volume that is variable via movement of the control slide valve; and
the forth fluid space is fluidically connected to the return flow port via the connecting duct.

9. The pressure regulating valve of claim 1 , wherein at least sections of the return flow port are located at a longitudinal end of the housing facing away from the pole tube.

10. A pressure regulating valve, comprising:
a housing including:
an inflow port;
a return flow port; and
an outlet port;

a control slide valve positioned in the housing and movable along a direction of a longitudinal axis, the control slide valve and the housing together forming a first orifice and a second orifice that each have a cross-sectional area that is adjustable in opposite directions via movement of the control slide valve, wherein:
the inflow port is fluidically connected to the outlet port via the first orifice; and
the return flow port is fluidically connected to the outlet port via the second orifice;

a pole tube;
an armature that is positioned in the pole tube and movable along the direction of the longitudinal axis, and that demarcates a first fluid space and a second fluid space from each other within the pole tube such that the first fluid space and the second fluid space each have a volume that is adjustable in opposite directions via displacement of the armature;
a coupling rod that extends with a constant first outer cross-sectional shape in the direction of the longitudinal axis, and that motionally couples the armature with the control slide valve, wherein:
at least inner sections of the coupling rod and the control slide valve together at least partially delimit a third fluid space that extends in the direction of the longitudinal axis; and
the third fluid space fluidically connects the first fluid space to the outlet port; and

a pressure transmission pin that extends with a constant second outer cross-sectional shape in the direction of the longitudinal axis, and that includes:
a first end facing toward the armature and projecting into the control slide valve; and
a second end facing away from the armature and positioned so that the pressure transmission pin is at least indirectly supported against the housing;

wherein a hydraulically effective area of the second outer cross-sectional shape is larger than a hydraulically effective area of the first outer cross-sectional shape;
wherein the control slide valve, the coupling rod, and the armature are configured such that a pressure at the outlet port acts in the direction of the longitudinal axis on an effective area defined by a difference in area between the first outer cross-sectional shape and the second outer cross-sectional shape; and
wherein the control slide valve includes a first groove and a second groove that together delimit a first web having at least one first radial bore running transversely to the longitudinal axis and connecting the outlet port to the third fluid space.

11. The pressure regulating valve of claim 10 , wherein the control slide valve is configured such that a hydraulic force exerted on the control slide valve at the inflow port in the direction of the longitudinal axis is zero.

12. The pressure regulating valve of claim 10 , wherein the control slide valve is configured such that a hydraulic force exerted on the control slide valve at the return flow port in the direction of the longitudinal axis is approximately zero.

13. The pressure regulating valve of claim 10 , wherein movement of the control slide valve toward the pole tube causes a free cross-sectional area of the first orifice to decrease.

14. The pressure regulating valve of claim 10 , wherein the coupling rod and the control slide valve are separate elements that are fixedly connected to each other.

15. The pressure regulating valve of claim 10 , wherein the pole tube and the housing are separate elements that are fixedly connected to each other.

16. The pressure regulating valve of claim 10 , wherein:
the control slide valve further includes a

Assignees

• Bosch Gmbh Robert

Inventors

• Zaiser Liebhart

Classifications

• G05D16/2024

  the throttling means being a multiple-way valve · CPC title

• F16K11/0716

  with fluid passages through the valve member (F16K11/0704, F16K11/0708, F16K11/0712 take precedence) · CPC title

• F16K31/0613

  with cylindrical slides · CPC title

• Y10T137/86702

  With internal flow passage · CPC title

• F16K31/0693 Primary

  Pressure equilibration of the armature · CPC title