发动机引气系统操作/故障排除指南In Service Information Ref: ISI 36.11.00090 A319/A320/A321 CEO ATA 36-11

In Service Information Ref: ISI 36.11.00090 A319/A320/A321 CEO ATA 36-11 Engine bleed air system Operation / troubleshooting guidelines服务信息参考：ISI 36.11.00090/A320/A321 CEO ATA 36-11 发动机引气系统操作/故障排除指南

Operation / troubleshooting guidelines

General

The purpose of the engine bleed air supply system is to:

• select one of two compressor stages of the engine HP compressor in agreement with the supplied pressure

• regulate the bleed air pressure to 44 ± 3 psig.

• regulate the bleed air temperature to 200 ± 15 deg.C.

The engine bleed air system supplies user systems and is monitored by Bleed Monitoring Computer (BMC). The engine of each wing supply air to one of the two air conditioning systems and their associated wing ice protection systems. Both wing systems operate in parallel. A cross-bleed valve isolates one system from the other.

概述_

发动机引气系统的主要功能包括：

• 根据设定压力选择发动机高压压气机的两个压气机级之一；

• 将引气压力调节至44±3psig；

• 将引气温度调节至200±15℃。

该系统为各用户系统提供引气，并由引气监控计算机（BMC）进行实时监测。每侧机翼的发动机均向两个空调系统及其配套的防冰系统供气，两套系统并行运行。通过交输活门实现系统间的隔离。

System description

系统描述

System functions

系统功能

Pressure regulation

压力调节

• PRV: Allows air bleed from engine and regulates bleed air pressure to 44 ± 3 psig.

• PRV ：允许发动机引气，并将引气压力调节至44±3 psig。

• TLT: Controls the PRV. The PRV also operates pneumatically but opening and closing can be controlled by the TLT. The solenoid is installed in the duct downstream of the PCE. The solenoid controls the PRV which controls the HP bleed valve at the same time.

• TLT ：控制 PRV 。该 PRV 同样采用气动驱动，但打开和关闭操作可由 TLT 控制。电磁恒温器安装在PCE下游管道中，同时控制 PRV 及HPV。

• S/L 2: Transmits the PRV upstream pressure to a pressure transducer.

• S/L 2：将 PRV 上游压力传输至压力传感器。

• S/L 3: Receives a pressure signal from the control solenoid (bleed valve closure).

• S/L 3：接收来自控制电磁阀（引气活门PRV关闭）的压力信号。

• OPV: Provides overpressure protection of PRV. Starts to close at 75 psig to reduce air flow and pressure. Fully closed at 85 psig and reopens when upstream pressure ≤ 35 psig.

• OPV ：为 PRV 提供超压保护。当压力达到75 psig时开始关闭以减少气流和压力，85 psig时完全关闭，当上游压力≤35 psig时重新开启。

• S/L 6: Provides reference pressure to PRV for regulation and back flow protection.

• S/L 6：为 PRV 提供参考压力以实现调节和反流保护。

• Pr: Measures air pressure downstream of PRV (regulated pressure) and provides BMC with an associated electric signal.

• Pr：测量 PRV 下游气压（调节压力），并向BMC提供相关电信号。

• S/L 4: Transmits air pressure to Pr from downstream duct of PRV.

• S/L 4：将 PRV 下游管道的气压传输至Pr。

IP to HP transfer (engine air source)

IP至HP的气路切换（发动机气源）

• HPV: Allows air bleed from HP port at low engine power. Pressure downstream limitation to 36 psig and reverse flow protection of the HP stage. Closes when upstream static pressure reaches 105 ± 5 psig.

HPV：允许发动机低功率运行时从高压级引气。下游压力限制为36 psig，并对高压级提供反流保护。当上游静压达到105 ± 5 psig时关闭。

• S/L 1: Permits HPV opening (when pressurized) and closing (when vented to ambient).

• S/L 1：允许HPV开启（加压时）和关闭（通向环境时）。

• IPCV: Bleeds air from IP stage when HP bleed valve in closed position. Prevents reverse flow to IP port.

• IPCV ：当HPV处于关闭位置时，从IP引气，防止空气逆流至IP。

• Pt: Measures air pressure upstream of PRV (transferred pressure) and provides BMC with an associated electric signal.

•Pt：测量 PRV 上游的气压（切换压力），并向BMC提供相应的电信号。

Temperature control

温度控制

• PCE: Cools engine air bleed using fan air.

•PCE：利用风扇空气冷却发动机引气。

• TCT: Controls engine fan cooling airflow through FAV to maintain it at 200 ± 15 deg.C.

• TCT ：通过FAV控制发动机风扇冷却气流，维持温度在200±15℃。

• S/L 5: Permits FAV opening when pressurized.

•S/L5：允许FAV在加压时开启。

• FAV: Provides cold fan air to PCE upon pressure signal from TCT to regulate temp to 200 ± 15 deg.C.

•FAV：根据 TCT 的压力信号向PCE提供冷风扇空气，将温度调节至200±15℃。

• T: Measures air temperature downstream of PCE and provides BMC with an associated electrical signal.

•T：测量PCE下游空气温度，并向BMC提供相关电信号。

Monitoring

监测

BMC: Controls and monitors bleed air temperature, bleed air pressure and IP to HP transfer. Receives info about the three systems and supplies indications and warnings to ECAM and CFDS.

BMC：控制并监测引气温度、引气压力及从IP到HP的气压转换。接收三个系统的信息，并向 ECAM 和 CFDS 提供指示与警告。

Additional information

补充信息

• Use of the bleed test set P/N 98L36103002000 and associated tools or equivalent is recommended for valve test, S/L leakage or troubleshooting. For the latest bleed test standards, refer to the AMM.

•建议使用引气测试套装P/N98L36103002000及配套工具或等效设备进行活门测试、S/L泄漏检测或故障排查。最新测试标准请参阅AMM。

• Valve (HPV, PRV) position indication (including wiring) can be checked by manually actuating the valve and checking the position indication displayed on ECAM bleed page is in accordance.

•通过手动操作活门并核对 ECAM 引气页面显示的位置指示，可确认活门（HPV、 PRV）位置指示（含线路）是否准确。

• To reduce the number of NFF replacements and avoid repetitive faults, consider:

– troubleshooting practises: application of advanced troubleshooting tasks before BMC removal

– preventive maintenance practises: application on Engine Bleed Air System Health Check program. ISI 36.11.00022 refers.

•为减少 NFF 更换次数并避免重复故障，建议采取以下措施：

– 故障排除操作规范：在移除BMC前实施先进的故障排除任务

– 预防性维护操作规范：应用于发动机引气系统健康检查程序。参见ISI 36.11.00022。

Refer to the following ISI for more information:

更多信息请参阅以下ISI：

ISI 36.11.00021: Engine Bleed Air System Components Evolution and Interchangeability

ISI 36.11.00039: Preventive Cleaning / Replacement of the temperature control thermostat filter

ISI 36.11.00020: Air & Bleed Working Group Activities

ISI 36.11.00001: Engine Bleed Air System Health Check Maintenance Program

for maintenance

维护

Electrical connectors

电气连接器

• Damage of an electrical connector can lead to a faulty valve position indication or a faulty open/close command.

• 电气连接器损坏可能导致活门位置指示异常或开关指令故障。

• Specific attention should be paid condition of harness connectors to avoid unjustified valve removals and repetitive faults on aircrafts.

• 应特别关注线束连接器的状态，避免不必要的活门拆除和飞机重复故障。

Pneumatic connectors

气动连接器

• Damage of a sense line connection can lead to leaks which results into drift in regulation, and/or valves locked closed. S/L6 (if installed) are particularly sensitive to leaks.

• 感应管路连接损坏可能导致泄漏，引发调节波动和/或活门卡在关闭位。S/L6（如已安装）对泄漏尤为敏感。

• In order to prevent sense line leak and connector damage tighten then connector by hand.

• 为防止感应管路泄漏和连接器损坏，请手动拧紧连接器。

• Then torque to the adequate value with pliers if necessary.

• 如有必要，可用钳子将扭矩调整至适当值。

• For flexible sense lines use a second plier to prevent sense line twisting when torquing (S/L 3 is particularly affected).

• 对于柔性感应管，需使用第二把钳子以防止拧紧时发生缠绕（S/L 3型号尤为易受影响）。

• If connection by hand is not possible, do not force torquing with a pliers as it would result in further damages, try with a new sense line.

• 若无法手动连接，请勿强行使用钳子拧紧，以免造成进一步损坏，建议更换新感应管。

Torque values

扭矩值

Sense line nuts ：1.6 m·daN (140 lbf. inch)

感应管螺母：1.6 m·daN（140 lbf. inch）。

Sense line/valve connections shall be carefully aligned and hand tightened first to avoid thread damage. Refer to ISI 36.11.00023 for Bleed Sense Lines Maintenance Recommendations

感应管/活门连接需仔细对准并手动拧紧，以避免螺纹损坏。关于引气感应管维护建议，请参阅ISI 36.11.00023。

Duct clamps

管道夹具

CFM Hot air ：1.29 to 1.41 m. daN (115 to 125 lbf. inch)

CFM热气：1.29至1.41 m. daN（115至125 lbf. inch）；

Cooling air ：0.56 to 0.79 m. daN (50 to 70 lbf. inch)

冷气：0.56至0.79 m. daN（50至70 lbf. inch）；

IAE Hot air ：0.84 to 0.96 m. daN (75 to 85 lbf. inch)

IAE 热气：0.84至0.96 m. daN（75至85 lbf. inch）；

Cooling air ：0.56 to 0.79 m. daN (50 to 70 lbf. inch)

冷气：0.56至0.79 m. daN（50至70 lbf. inch）