Line pressure valve to selectively control distribution of pressurized fluid
AssigneeEaton Corporation
InventorsAdam C. Maurer, Jerry J. Brittan, Robert J. Kanda, Darren Firth, Melissa M. Koenig
Life of this patent
Estimating the term…
Abstract
A line pressure valve includes a valve housing having a central cavity and a plurality of inlet and outlet ports, and a spool positioned within the central cavity and axially displaceable therein, the spool having a plurality of radial cutouts that fluidly connect respective inlet and outlet ports based on an axial position of the spool with respect to the valve housing. First and second pumps are fluidly connectable and disconnectable respectively to and from the fluid circuit based on the axial position of the spool via the inlet and outlet ports.
Claims18
A line pressure valve comprising:
- a valve housing having a central cavity and a plurality of inlet and outlet ports;
- and
- a spool positioned within the central cavity and axially displaceable therein, the spool having a plurality of radial cutouts that fluidly connect respective inlet and outlet ports based on an axial position of the spool with respect to the valve housing;
- wherein:
- first and second pumps are fluidly connectable and disconnectable respectively to and from the fluid circuit based on the axial position of the spool via the inlet and outlet ports;
- the first pump is configured to be fluidly disconnected from the fluid circuit when the spool is arranged in a first, a second, and a first intermediate position between the first and second positions, and the first pump is configured to be fluidly connected to the fluid circuit when the spool is arranged in a third position and a second intermediate position between the second and third positions;
- and
- the second pump is configured to be fluidly disconnected from the fluid circuit when the spool is arranged in the first position, and the second pump is configured to be fluidly connected to the fluid circuit when the spool is arranged in the second position, the third position, the first intermediate position, and the second intermediate position.
A hydraulic system comprising:
- a first fluid circuit;
- a second fluid circuit;
- a first pump fluidly connected to the first fluid circuit and selectively connectable to the second fluid circuit;
- a second pump selectively fluidly connectable to the first fluid circuit and the second fluid circuit;
- a line pressure valve comprising:
- a valve housing having a central cavity and a plurality of inlet and outlet ports;
- and
- a spool positioned within the central cavity and axially displaceable therein, the spool having a plurality of radial cutouts that fluidly connect respective inlet and outlet ports based on an axial position of the spool with respect to the valve housing;
- wherein:
- the first and second pumps are fluidly connectable and disconnectable respectively to and from the first and second fluid circuits based on the axial position of the spool via the inlet and outlet ports;
- the first pump is configured to be fluidly disconnected from the second fluid circuit when the spool is arranged in a first, a second, and a first intermediate position between the first and second positions, and the first pump is configured to be fluidly connected to the second fluid circuit when the spool is arranged in a third position and a second intermediate position between the second and third positions;
- and
- the second pump is configured to be fluidly disconnected from the second fluid circuit when the spool is arranged in the first position, and the second pump is configured to be fluidly connected to the second fluid circuit when the spool is arranged in the second position, the third position, the first intermediate position, and the second intermediate position.
Dependencies are inferred from the claim text.