Anti-lock brake relief valve with integrated flow control orifice
AssigneeDelphi Technologies, Inc.
InventorsSterling Charles Pepper, Denise Ann Quinnette, Rick Lee Nawman, Daniel H. Anderson
Life of this patent
Estimating the term…
Abstract
A relief valve for an anti-lock braking system includes a plunger-operated ball and a valve body that defines a seat for receiving the ball thereon. The valve body also defines a relief passageway for relieving hydraulic fluid through the passageway at a rate that is appropriate for prevent brake locking, i.e., skidding. To establish the rate, an orifice is integrally formed on the valve body in the passageway, thereby obviating the need for a separate orifice cup.
Claims20
A relief valve for an anti-lock brake system, comprising:
- a valve body formed with a relief passageway terminating at a valve opening circumscribed by a valve seat, the valve body being integrally formed with an orifice in the relief passageway, the orifice being smaller than the valve opening;
- and
- a solenoid-actuated valve element movable between a pressure hold configuration, wherein the valve element contacts the valve seat to prevent fluid flow through the relief passageway, and a pressure relief configuration, wherein the valve element is distanced from the valve seat to permit fluid flow through the passageway.
A method for forming a relief valve for an anti-lock brake system (ABS), comprising the acts of:
- establishing an orifice diameter and valve seat opening diameter;
- establishing a valve body length bearing a predetermined relationship to the orifice diameter;
- forming a relief valve body having the valve body length, the relief valve body defining an orifice having the orifice diameter;
- and
- assembling the relief valve body into an ABS system.
A relief valve system for an ABS system, comprising:
- a hydraulic fluid line;
- a valve housing disposed in the line;
- a valve body disposed in the valve housing, the valve body being formed with an open valve seat and a relief passageway extending away from the seat, the relief passageway defining a diameter;
- and
- an orifice in the valve body distanced from the valve seat to establish a predetermined rate of fluid flow through the relief passageway, the orifice defining a diameter that is smaller than the diameter of the relief passageway.
A relief valve for an anti-lock brake system, comprising:
- a valve body formed with a relief passageway terminating at a valve opening circumscribed by a valve seat, the valve body being integrally formed with an orifice in the relief passageway, the valve body defining a length, the orifice defining a diameter that is smaller than the valve opening, the ratio of the length to the diameter being between seven (7) and twenty (20) inclusive;
- and
- a solenoid-actuated valve element movable between a pressure hold configuration, wherein the valve element contacts the valve seat to prevent fluid flow through the relief passageway, and a pressure relief configuration, wherein the valve element is distanced from the valve seat to permit fluid flow through the passageway.
A method for forming a relief valve for an anti-lock brake system (ABS), comprising the acts of:
- establishing an orifice diameter and valve seat opening diameter larger than the orifice diameter;
- establishing a valve body length that is between seven (7) and twenty (20) times, inclusive, larger than the orifice diameter;
- forming a relief valve body having the valve body length, the relief valve body defining an orifice having the orifice diameter;
- and
- assembling the relief valve body into an ABS system.
A relief valve system for an ABS system, comprising:
- a hydraulic fluid line;
- a valve housing disposed in the line;
- a valve body disposed in the valve housing, the valve body being formed with an open valve seat and a relief passageway extending away from the seat, the valve body defining a length;
- and
- an orifice in the valve body to establish a predetermined rate of fluid flow through the relief passageway, the orifice defining a diameter, the ratio of the valve body length to the orifice diameter being between seven (7) and twenty (20) inclusive.
Dependencies are inferred from the claim text.