Reservoir with variable charge pressure
AssigneeCNH Industrial America LLC
InventorsJerry L. Brinkley, Matthew Klopfenstein, Michelle Lass Sterrett, Joshua Zimmerman, Hossein Gholizadeh
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Abstract
A fluid system includes a reservoir having a first reservoir chamber and a second reservoir chamber separated by a movable barrier, the first reservoir chamber being configured to contain a working fluid. The fluid system includes a piston housing defining an internal volume and a piston movable within the internal volume, the piston separating the internal volume into a first piston chamber and a second piston chamber, the second piston chamber being fluidly coupled to the second reservoir chamber. The fluid system includes a fluid supply configured to provide a control fluid to the first piston chamber.
Claims20
A fluid system, comprising:
- a reservoir having a first reservoir chamber and a second reservoir chamber separated by a movable barrier, the first reservoir chamber being configured to contain a working fluid;
- a piston housing defining an internal volume;
- a piston movable within the internal volume, the piston separating the internal volume into a first piston chamber and a second piston chamber, the second piston chamber being fluidly coupled to the second reservoir chamber;
- and
- a fluid supply configured to provide a control fluid to the first piston chamber.
A vehicle, comprising:
- a chassis;
- a tractive element coupled to the chassis;
- an actuator coupled to the chassis;
- and
- a fluid system including:
- a reservoir having a first chamber and a second chamber separated by a first movable barrier, the first chamber being fluidly coupled to the actuator and containing a first hydraulic fluid;
- a housing defining an internal volume;
- a second movable barrier within the internal volume, the second movable barrier separating the internal volume into a third chamber and a fourth chamber, the third chamber being fluidly coupled to the second chamber, and the second and third chambers containing a gas;
- and
- a fluid supply configured to provide a second hydraulic fluid to the fourth chamber.
A fluid system, comprising:
- a first chamber fluidly coupled to an actuator;
- a second chamber containing a gas;
- a first movable barrier at least partially defining the first chamber and the second chamber;
- a third chamber fluidly coupled to the second chamber and containing the gas;
- a fourth chamber;
- a second movable barrier at least partially defining the third chamber and the fourth chamber;
- a first valve fluidly coupled to the fourth chamber and configured to direct a control fluid into the fourth chamber to move the second movable barrier in a first direction that decreases a volume of the third chamber;
- and
- a second valve fluidly coupled to the fourth chamber and configured to direct the control fluid out of the fourth chamber to move the second movable barrier in a second direction that increases the volume of the third chamber.
Dependencies are inferred from the claim text.