Method for fuselage leak monitoring and detection by an integrated APU-ECS-CPCS system

    公开(公告)号:US10755493B2

    公开(公告)日:2020-08-25

    申请号:US16025507

    申请日:2018-07-02

    Abstract: A system of pressure control for an environment to be pressurized includes a controller configured to calculate an environment leakage effective area CdALEAK according to: CdALEAK=f(Pc, Tc, Pa, WLEAK) wherein Pc is an environment pressure; Tc is an environment temperature; Pa is an ambient pressure outside of the environment; WLEAK=WECS−WOFV−WAPU; wherein WECS=air pressure inflow into the environment; WOFV=air pressure outflow to ambient that is outside of the environment; WAPU=f(Tin, Pin, APURPM, Flowfuel); wherein Tin=inlet temperature to a power source; Pin=inlet pressure to the power source; APURPM=rotational speed of the power source; Flowfuel=power source fuel flow. A processor is in communication with the controller and configured to compare a current CdALEAK value with a control limit; wherein the control limit is based on historical CdALEAK values.

    METHOD FOR FUSELAGE LEAK MONITORING AND DETECTION BY AN INTEGRATED APU-ECS-CPCS SYSTEM

    公开(公告)号:US20190287321A1

    公开(公告)日:2019-09-19

    申请号:US16025507

    申请日:2018-07-02

    Abstract: A system of pressure control for an environment to be pressurized includes a controller configured to calculate an environment leakage effective area CdALEAK according to: CdALEAK=f(Pc, Tc, Pa, WLEAK) wherein Pc is an environment pressure; Tc is an environment temperature; Pa is an ambient pressure outside of the environment; WLEAK=WECS−WOFV−WAPU; wherein WECS=air pressure inflow into the environment; WOFV=air pressure outflow to ambient that is outside of the environment; WAPU=f(Tin, Pin, APURPM, Flowfuel); wherein Tin=inlet temperature to a power source; Pin=inlet pressure to the power source; APURPM=rotational speed of the power source; Flowfuel=power source fuel flow. A processor is in communication with the controller and configured to compare a current CdALEAK value with a control limit; wherein the control limit is based on historical CdALEAK values.

    CABIN PRESSURE CONTROL SYSTEM ARCHITECTURE USING CABIN PRESSURE AIR FOR INLET TO APU CORE COMPRESSOR

    公开(公告)号:US20190283884A1

    公开(公告)日:2019-09-19

    申请号:US16055089

    申请日:2018-08-04

    Abstract: A pressure control system includes an overboard valve in indirect communication with a first enclosed environment and in direct communication with a second enclosed environment. The first environment is suitable for human occupancy and configured to receive pressurized air from an environmental control system. The second environment is configured to receive the pressurized air from the first environment. An inboard valve is configured to supply a discharge of pressurized air from the second environment. An outflow valve is configured to regulate a discharge of air from the first environment to an area outside the first and second environments. A positive pressure relief valve configured to regulate a discharge of air from the first environment. A negative pressure relief valve configured to regulate an ingress of air into the first environment. A control valve is configured to regulator and supply pressurized air from the first environment to a compressor.

    Cabin pressure control system with selection of rate of change

    公开(公告)号:US12129034B2

    公开(公告)日:2024-10-29

    申请号:US17326655

    申请日:2021-05-21

    CPC classification number: B64D13/04 G05D16/202

    Abstract: A cabin pressure control and monitoring system includes an outflow valve and a manual control panel comprising a selector switch and configured to generate a signal, wherein a value encoded in the signal is dependent on a position of the selector switch. The cabin pressure control and monitoring system also includes a controller configured to receive the signal from the manual control panel, determine a target rate of change for a cabin pressure based on the value encoded in the signal, and control the outflow valve based on the target rate of change.

    CABIN PRESSURE CONTROL SYSTEM WITH SELECTION OF RATE OF CHANGE

    公开(公告)号:US20220289391A1

    公开(公告)日:2022-09-15

    申请号:US17326655

    申请日:2021-05-21

    Abstract: In some examples, a cabin pressure control and monitoring system includes an outflow valve and a manual control panel comprising a selector switch and configured to generate a signal, wherein a value encoded in the signal is dependent on a position of the selector switch. The cabin pressure control and monitoring system also includes a controller configured to receive the signal from the manual control panel, determine a target rate of change for a cabin pressure based on the value encoded in the signal, and control the outflow valve based on the target rate of change.

    Cabin pressure control system architecture using cabin pressure air for inlet to APU core compressor

    公开(公告)号:US10988262B2

    公开(公告)日:2021-04-27

    申请号:US16055089

    申请日:2018-08-04

    Abstract: A pressure control system includes an overboard valve in indirect communication with a first enclosed environment and in direct communication with a second enclosed environment. The first environment is suitable for human occupancy and configured to receive pressurized air from an environmental control system. The second environment is configured to receive the pressurized air from the first environment. An inboard valve is configured to supply a discharge of pressurized air from the second environment. An outflow valve is configured to regulate a discharge of air from the first environment to an area outside the first and second environments. A positive pressure relief valve configured to regulate a discharge of air from the first environment. A negative pressure relief valve configured to regulate an ingress of air into the first environment. A control valve is configured to regulator and supply pressurized air from the first environment to a compressor.

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