A control circuit for controlling the pressure of a tire wheel
AssigneeCNH Industrial America LLC
InventorsAlessandro Benevelli, Riccardo Morselli
Life of this patent
Estimating the term…
Abstract
A control circuit includes a controlled pressure line, connectable to a compressor, a first line, connectable to the controlled pressure line and connected to the first volume for introducing air inside the first volume, and a second line, connectable to the controlled pressure line and connected to the second volume for introducing air inside the second volume. The control circuit also includes a first spool valve, which is a three way-two positions valve, configured to switch from a first position to a second position if the pressure in the first volume exceeds a predetermined pressure.
Claims11
1-5. (canceled)
A control circuit for controlling the pressure of a tire wheel comprising a rim, an inner tube that encloses a first volume, a tire fixed to the rim that encloses the inner tube and a second volume external to the inner tube, the control circuit comprising:
- a controlled pressure line connected to a compressor;
- a first line configured to connect to the controlled pressure line and connected to the first volume for introducing air inside the first volume;
- a second line configured to connect to the controlled pressure line and connected to the second volume for introducing air inside the second volume;
- a first spool valve, which is a three way-two positions valve, and
- configured to switch between a first position in which the controlled pressure line is connected to the first line and a second position in which the controlled pressure line is connected to the second line;
- and
- an outlet spool valve connected to the second line and to an outlet line, wherein the outlet spool valve is a two way-two position valve, the outlet spool valve is configured to switch between a first position that closes a connection between the second line and the outlet line and a second position that opens the connection between the second line and the outlet line, and wherein the outlet spool valve is configured to switch from the first position to the second position when a pressure in the second volume exceeds a predetermined pressure.
A wheel, comprising:
- a rim;
- an inner tube, which encloses a first volume;
- a tire, fixed to the rim, which encloses the inner tube and a second volume external to the inner tube;
- an inflate valve configured to introduce air into the first volume and the second volume;
- and
- a control circuit connected to the rim and interposed between the inflate valve and the first and second volume, the control circuit comprising:
- a controlled pressure line connected to a compressor;
- a first line configured to connect to the controlled pressure line and connected to the first volume for introducing air inside the first volume;
- a second line configured to connect to the controlled pressure line and connected to the second volume for introducing air inside the second volume;
- a first spool valve, which is a three way-two positions valve, and configured to switch between a first position in which the controlled pressure line is connected to the first line and a second position in which the controlled pressure line is connected to the second line;
- and
- an outlet spool valve connected to the second line and to an outlet line, wherein the outlet spool valve is a two way-two position valve, the outlet spool valve is configured to switch between a first position that closes a connection between the second line and the outlet line and a second position that opens the connection between the second line and the outlet line, and wherein the outlet spool valve is configured to switch from the first position to the second position when a pressure in the second volume exceeds a predetermined pressure.
Dependencies are inferred from the claim text.