Pedal modulating valve assembly including multiple gain states
AssigneeZf Off-Highway Solutions Minnesota Inc.
InventorsPeter Backes, Craig Lapoint
Life of this patent
Estimating the term…
Abstract
A valve assembly is provided. The valve assembly includes a valve body defining a bore. The valve assembly further includes a plunger adjacent the valve body. The valve assembly further includes a modulating biasing member abutting the plunger. The valve assembly further includes a spool disposed in the bore and adjacent the plunger with the modulating biasing member disposed therebetween. The plunger is configured to move the spool between a neutral position and an energized position. The spool defines a socket. The valve assembly further includes a piston disposed in the socket and configured to move between a first piston position and a second piston position within the socket.
Claims18
A valve assembly, comprising:
- a valve body defining a bore;
- a plunger adjacent to the valve body;
- a modulating biasing member disposed in the bore and abutting the plunger;
- a spool disposed in the bore and adjacent the plunger with the modulating biasing member disposed therebetween, the plunger configured to move the spool between a neutral position and an energized position, and the spool defining a socket;
- a piston disposed in the socket and configured to move between a first piston position and a second piston position within the socket;
- and
- a dowel extending through the spool and the piston with the spool and piston operatively arranged with the dowel so as to slide relative to the dowel.
A system having a first gain state and a second gain state, the system comprising:
- a fluid source configured to provide a fluid force;
- a valve assembly in fluid communication with the fluid source, the valve assembly comprising:
- a plunger,
- a modulating biasing member abutting the plunger;
- a spool adjacent the plunger with the modulating biasing member disposed therebetween, the plunger configured to move the spool between a neutral position and an energized position;
- a piston in fluid communication with the fluid source via a port, the piston configured to move between a first piston position and a second piston position;
- and
- a dowel extending through the spool and the piston with the spool and piston operatively arranged with the dowel so as to slide relative to the dowel;
- and
- a working unit in fluid communication with the valve assembly and configured to activate in response to the fluid force;
- wherein the system is in the first gain state when the piston is in the first piston position and the system is in the second gain state when the piston is in the second piston position.
Dependencies are inferred from the claim text.