The present disclosure relates to isolation and reconfiguration schemes, architectures and methods for use in aircraft hydraulic systems. The main hydraulic system of each hydraulic section of the aircraft hydraulic system can be isolated from one or more consumers in the event of a leak without the
The present disclosure relates to isolation and reconfiguration schemes, architectures and methods for use in aircraft hydraulic systems. The main hydraulic system of each hydraulic section of the aircraft hydraulic system can be isolated from one or more consumers in the event of a leak without the use pressure from the backup system. Further, in some embodiments, the main hydraulic system of each hydraulic section of the aircraft hydraulic system can be isolated from one or more consumers in the event of a leak without the use pressure from the backup system and the main system.
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1. An isolation valve arrangement, comprising: a main port;a main return port;a backup port;a backup return port;a consumer port;a consumer return port;a first main fluid flow path for a main system that extends from the main port to the consumer port;a second main fluid flow path for the main syste
1. An isolation valve arrangement, comprising: a main port;a main return port;a backup port;a backup return port;a consumer port;a consumer return port;a first main fluid flow path for a main system that extends from the main port to the consumer port;a second main fluid flow path for the main system that extends from the consumer return port to the main return port;a first backup fluid flow path for a backup system that extends from the backup port to the consumer port;a second backup fluid flow path for the backup system that extends from the consumer return port to the backup return port;a first pilot operated shutoff valve located on the first main fluid flow path between the main port and the consumer port that in a first position provides fluid communication between the main port and the consumer port and in a second position prevents fluid communication between the main port to the consumer port;a first pilot port connected to the first pilot operated shutoff valve;a second pilot operated shutoff valve located on the second main fluid flow path between the consumer return port and the main return port that in a first position provides fluid communication between the consumer return port and the main return port and in a second position prevents fluid communication between the consumer return port and the main return port;a second pilot port connected to the second pilot operated shutoff valve; anda pilot flow path that extends from the main port to the first and the second pilot ports of the first and second pilot operated shut off valves; anda first solenoid valve located on the pilot flow path between the main port and the first and the second pilot ports of the first and the second pilot operated shutoff valves that in a first position provides fluid communication between the main port and the first and the second pilot ports and in a second position prevents fluid communication between the main port and the first and the second pilot ports,wherein the main system is isolated from a consumer without requiring backup pressure from the backup system. 2. The isolation valve arrangement of claim 1, wherein the first main fluid flow path is isolated from the consumer without requiring utilization of main pressure. 3. The isolation valve arrangement of claim 2, wherein the first main fluid flow path is isolated from the consumer by utilizing power from an electrical power source. 4. The isolation valve arrangement of claim 2, wherein the first main fluid flow path is isolated from the consumer when main pressure is not provided by the main system. 5. The isolation valve arrangement of claim 2, wherein the first solenoid valve is spring biased into the first position. 6. The isolation valve arrangement of claim 5, wherein the first pilot operated shutoff valve is spring biased into the second position and the second pilot operated shutoff valve is spring biased into the second position. 7. The isolation valve arrangement of claim 6, wherein the second position of the second pilot operated shutoff valve further provides fluid communication between the consumer return port and the backup return port. 8. The isolation valve arrangement of claim 7, wherein the second position of the first solenoid valve further provides fluid communication between the pilot flow path and the main return port. 9. The isolation valve arrangement of claim 1, wherein the first main fluid flow path is isolated from the consumer by utilizing main pressure and power from an electrical power source. 10. The isolation valve arrangement of claim 9, wherein the first main fluid flow path is isolated from the consumer by utilizing backup pressure. 11. The isolation valve arrangement of claim 10, wherein the first solenoid valve is spring biased into the second position. 12. The isolation valve arrangement of claim 11, wherein the first pilot operated shutoff valve is spring biased into the first position and the second pilot operated shutoff valve is spring biased into the first position. 13. The isolation valve arrangement of claim 12, further comprising: a third pilot operated shutoff valve located on the second backup fluid flow path between the consumer return port and the backup return port; anda third pilot port connected to the third pilot operated shutoff valve, wherein the third pilot port is located on a flow path selected from a group of: the pilot flow path adjacent to the second pilot port and the first backup fluid flow path adjacent to the backup port,wherein the third pilot operated shutoff valve prevents fluid communication between the consumer return port and the backup return port when the third pilot operated shutoff valve is in a spring biased position, andwherein the third pilot operated shutoff valve provides fluid communication between the consumer return port and the backup return port when the third pilot operated shutoff valve is in an actuated position. 14. The isolation valve arrangement of claim 13, wherein the second position of the first solenoid valve further provides fluid communication between the pilot flow path and the main return port. 15. The isolation valve arrangement of claim 14, further comprising a flow path valve located on the first main fluid flow path between the main port and the pilot flow path and located on the first backup fluid flow path between the backup port and the pilot flow path that in a first position provides fluid communication between the main port and the pilot flow path while further preventing fluid communication between the backup port and the pilot flow path and in a second position provides fluid communication between the backup port and the pilot flow path while further preventing fluid communication between the main port and the pilot flow path, wherein the flow path valve is selected from a group of: a shuttle valve and a second solenoid valve. 16. The isolation valve arrangement of claim 15, further comprising: a fourth pilot operated shutoff valve located on the first main fluid flow path between the first solenoid valve and the flow path valve that in a spring biased position provide fluid communication between the main port and the flow path valve and in an actuated position prevents fluid communication between the main port and the flow path valve; anda fourth pilot port connected to the fourth pilot operated shutoff valve, wherein the fourth pilot port is located on the second backup fluid flow path adjacent to the backup port. 17. A zonal hydraulic system comprising: a power source;a main port;a main return port;a backup port;a backup return port;a consumer port;a consumer return port;a first circuit for a main system that extends from the main port to the consumer port through a consumer and back from the consumer return port to the main return port;a main pump connected to the main port and the main return port, the main pump is configured to pump main fluid through the main port and to receive the main fluid returned through the main return port;a second circuit for a backup system that extends from the backup port to the consumer port through the consumer and back from the consumer return port to the backup return port;a backup pump connected to the backup port and the backup return port, the backup pump is configured to pump backup fluid through the backup port and to receive the backup fluid returned through the backup return port;a first pilot operated shutoff valve located on the first circuit between the main port and the consumer port that in a first position provides fluid communication between the main port and the consumer port and in a second position prevents fluid communication between the main port and the consumer port;a first pilot port connected to the first pilot operated shutoff valve;a second pilot operated shutoff valve located on the first circuit between the consumer return port and the main return port that in a first position provides fluid communication between the consumer return port and the main return port and in a second position prevents fluid communication between the consumer return port and the main return port;a second pilot port connected to the second pilot operated shutoff valve; anda pilot flow path that extends from the main port to the first and the second pilot ports of the first and second pilot operated shut off valves;a first solenoid valve connected to an electrical power source and located on the pilot flow path between the main port and the first and the second pilot ports of the first and the second pilot operated shutoff valves that in a first position provides fluid communication between the main port and the first and the second pilot ports and in a second position prevents fluid communication between the main port and the first and the second pilot ports,wherein the first circuit is isolated from the consumer without requiring utilization of the backup fluid. 18. The zonal hydraulic system of claim 17, wherein the first circuit is isolated from the consumer without requiring utilization of the main fluid. 19. The zonal hydraulic system of claim 18, wherein the first circuit is isolated from the consumer by utilizing power from the power source. 20. The zonal hydraulic system of claim 18, wherein the first circuit is isolated from the consumer when the main pump does not pump the main fluid through the main port. 21. The zonal hydraulic system of claim 18, wherein the first solenoid valve is spring biased into the first position. 22. The zonal hydraulic system of claim 21, wherein the first pilot operated shutoff valve is spring biased into the second position and the second pilot operated shutoff valve is spring biased into the second position. 23. The zonal hydraulic system of claim 22, wherein the second position of the second pilot operated shutoff valve further provides fluid communication between the consumer return port and the backup return port. 24. The zonal hydraulic system of claim 23, wherein the second position of the first solenoid valve further provides fluid communication between the pilot flow path and the main return port. 25. The zonal hydraulic system of claim 18, wherein the first circuit is isolated from the consumer by utilizing the main fluid and power from the power source. 26. The zonal hydraulic system of claim 25, wherein the first circuit is isolated from the consumer by utilizing the backup fluid. 27. The zonal hydraulic system of claim 26, wherein the first solenoid valve is spring biased into the second position. 28. The zonal hydraulic system of claim 27, wherein the first pilot operated shutoff valve is spring biased into the first position and the second pilot operated shutoff valve is spring biased into the first position. 29. The zonal hydraulic system of claim 28, further comprising: a third pilot operated shutoff valve located on the second circuit between the consumer return port and the backup return port; anda third pilot port connected to the third pilot operated shutoff valve, wherein the third pilot port is located on a flow path selected from a group of: the pilot flow path adjacent to the second pilot port and the second circuit adjacent to the backup port,wherein the third pilot operated shutoff valve prevents fluid communication between the consumer return port and the backup return port when the third pilot operated shutoff valve is in a spring biased position, andwherein the third pilot operated shutoff valve provides fluid communication between the consumer return port and the backup return port when the third pilot operated shutoff valve is in an actuated position. 30. The zonal hydraulic system of claim 29, wherein the second position of the first solenoid valve further provides fluid communication between the pilot flow path and the main return port. 31. The zonal hydraulic system of claim 30, further comprising a flow path valve located on the first circuit between the main port and the pilot flow path and located on the second circuit between the backup port and the pilot flow path that in a first position provides fluid communication between the main port and the pilot flow path while further preventing fluid communication between the backup port and the pilot flow path and in a second position provides fluid communication between the backup port and the pilot flow path while further preventing fluid communication between the main port and the pilot flow path, wherein the flow path valve is selected from a group of: a shuttle valve and a second solenoid valve. 32. The zonal hydraulic system of claim 31, further comprising: a fourth pilot operated shutoff valve located on the first circuit between the first solenoid valve and the flow path valve that in a spring biased position provide fluid communication between the main port and the flow path valve and in an actuated position prevents fluid communication between the main port and the flow path valve,a fourth pilot port connected to the fourth pilot operated shutoff valve, wherein the fourth pilot port is located on the second circuit adjacent to the backup port.
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