Powered one-way solenoid valve and brake system using same

Patent metadata

Field	Value
Publication number	US-12590643-B2
Application number	US-202418421463-A
Country	US
Kind code	B2
Filing date	Jan 24, 2024
Priority date	Jan 24, 2024
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A powered one-way solenoid valve includes a valve cavity defining a one-way valve fluid path. A valve seat is located along the one-way valve fluid path. A valve poppet is configured for reciprocal motion between poppet open and closed positions. When the valve poppet is in the poppet closed position, a valve poppet shoulder selectively contacts the valve seat to substantially occlude fluid flow therepast along the one-way valve fluid path. The valve poppet shoulder includes a resilient annular seal contained within a sealing groove extending circumferentially around the valve poppet shoulder. The sealing groove is cooperatively defined at least partially longitudinally between a distal valve poppet flange of the valve poppet body and an annular poppet collar. The annular poppet collar is a separate piece from the valve poppet body and is maintained proximal to the distal valve poppet flange by a collar flange.

First claim

I claim:

1 . A powered one-way solenoid valve, comprising:
a valve cavity placing an input port and an output port in selective fluid communication via a one-way valve fluid path; a valve seat located along the one-way valve fluid path and at least partially defined by an interior wall of the valve cavity; and a valve poppet configured for reciprocal motion between a poppet open position and a poppet closed position wherein, when the valve poppet is in the poppet closed position, a valve poppet shoulder selectively contacts the valve seat to substantially occlude fluid flow therepast along the one-way valve fluid path, the valve poppet having a valve poppet body; wherein the valve poppet shoulder includes a resilient annular seal contained within a sealing groove extending circumferentially around the valve poppet shoulder, the sealing groove being cooperatively defined at least partially longitudinally between a distal valve poppet flange of the valve poppet body and an annular poppet collar; wherein the annular poppet collar is a separate piece from the valve poppet body and is maintained proximal to the distal valve poppet flange by a collar flange defined by a portion of the valve poppet body spaced apart from the valve poppet shoulder; and wherein a leak fluid path is at least partially defined cooperatively by the sealing groove, an inner surface of the annular poppet collar disposed laterally adjacent the valve poppet body, and a proximal surface of the annular poppet collar disposed longitudinally adjacent the collar flange, the leak fluid path permitting a predetermined amount of hydraulic fluid flow therepast between the input port and the output port responsive to a fluid pressure differential therebetween, at least a portion of the leak fluid path being separate from the one-way valve fluid path.

2 . The solenoid valve of claim 1 , wherein the valve poppet body is comprised substantially of a first material and the annular poppet collar is comprised substantially of a second material, different from the first material.

3 . The solenoid valve of claim 2 , wherein the first material is a metal and the second material is a polymer.

4 . The solenoid valve of claim 1 , wherein reciprocal motion of the one-way valve poppet occurs at least partially responsive to a predetermined amount of fluid pressure differential between the input port and the output port.

5 . The solenoid valve of claim 1 , including an armature for selective longitudinally reciprocating motion with respect to valve cavity between first and second armature positions, wherein the valve poppet is held into engagement with the valve seat, in the poppet closed position, responsive to the armature being in the first armature position, and wherein the valve poppet is permitted to selectively reciprocate between the poppet closed position and the poppet open position responsive to the armature being in the second armature position.

6 . The solenoid valve of claim 5 , including a core for selectively magnetically attracting the armature, the core being located longitudinally directly adjacent a core-activated surface of the armature, the armature being longitudinally interposed between the core and the valve poppet, the core being selectively energized to magnetically drive the armature between the first and second armature positions.

7 . The solenoid valve of claim 5 , including a poppet spring biasing the valve poppet toward the poppet closed position and sealing engagement with the valve seat when the armature is in the second armature position, the poppet spring being at least partially contained within a longitudinal poppet spring bore of the poppet and exerting an expansion force between the poppet and the armature.

8 . The solenoid valve of claim 6 , wherein a core sleeve is received at least partially in a housing also at least partially defining the input port and the output port, the core sleeve being configured to maintain the core in spaced relationship with the armature, the armature being at least partially enclosed within the core sleeve and guided thereby for selective longitudinal reciprocating motion with respect to the core responsive to energization of the core.

9 . The solenoid valve of claim 8 , wherein the core sleeve completely encloses the valve poppet, with a reduced-diameter sleeve shoulder, located on an opposite end of the valve poppet from the core, at least partially defining the valve seat by comprising at least a portion of an interior wall of the valve cavity.

10 . The solenoid valve of claim 6 , including a core spring biasing the armature toward the valve poppet, the core spring being at least partially contained within a longitudinal core spring bore of the armature and exerting an expansion force between the armature and the core.

11 . The solenoid valve of claim 10 , including a poppet spring biasing the valve poppet toward the poppet closed position and sealing engagement with the valve seat when the armature is in the second armature position, the poppet spring being at least partially contained within a longitudinal poppet spring bore of the poppet and exerting an expansion force between the poppet and the armature,
wherein the core spring bore of the armature extends completely longitudinally through the armature and has a stepped inner bore surface and defines a vent path to place the core spring bore in fluid communication with the poppet spring bore, and wherein an outer surface of the armature includes at least one longitudinally extending flow slot placing a proximalmost end of the core spring bore in fluid communication with the output port and accordingly into fluid communication with the vent path, via the core spring bore.

12 . An accumulator assembly, comprising:
a medium pressure accumulator, including
an MPA cavity including at least one brake-side passage adjacent a first end thereof and including at least one pump-side passage adjacent the first end thereof,
an MPA piston for reciprocal longitudinal motion within the MPA cavity responsive to a predetermined amount of hydraulic fluid flow through at least one of the pump-side passage and the brake-side passage, and
an MPA biasing spring for urging the MPA piston toward the first end of the MPA cavity;
a nonpowered MPA fill valve interposed fluidically between the pump-side passage of the MPA cavity and a source of pressurized hydraulic fluid; and a powered MPA one-way valve interposed fluidically between the brake-side passage of the MPA cavity and the at least one corresponding wheel brake, the MPA one-way valve being a powered solenoid valve including
a valve cavity placing an input port, configured to accept hydraulic fluid from the brake-side passage of the MPA cavity, and an output port, configured to supply hydraulic fluid to the at least one corresponding wheel brake, in selective fluid communication via a one-way valve fluid path,
a valve seat located along the one-way valve fluid path and at least partially defined by an interior wall of the valve cavity, and
a valve poppet configured for reciprocal motion between a poppet open position and a poppet closed position wherein, when the valve poppet is in the poppet closed position, a valve poppet shoulder selectively contacts the valve seat to substantially occlude fluid flow therepast along the one-way valve fluid path, the valve poppet having a valve poppet body,
wherein the valve poppet shoulder includes a resilient annular seal contained within a sealing groove extending circumferentially around the valve poppet shoulder, the sealing groove being cooperatively defined at least partially longitudinally between a dista

Assignees

• Zf Active Safety Us Inc

Inventors

• Ganzel Blaise

Classifications

• B60T15/028

  in hydraulic systems · CPC title

• B60T8/341

  Systems characterised by their valves (B60T8/36, B60T8/38 take precedence) · CPC title

• F16K1/46

  Attachment of sealing rings · CPC title

• B60T13/686

  in hydraulic systems or parts thereof · CPC title

• B60T13/662 Primary

  characterised by specified functions of the control system components · CPC title