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发表时间 : 2018-6-19 15:32:02 | 浏览 : 13496    评论 : 1

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Oil pressure and oil temperature indications are displayed with a round dial/moving pointer. Operating and caution ranges and limits are displayed with green and yellow bands and red radials.

The oil quantity indicator displays a digital readout of quantity as a percentage of full. The airborne vibration monitor indications are displayed with a round dial/moving pointer. N1, N2, oil quantity, and engine vibration are displayed directly from the engine sensors.
滑油压力和滑油温度通过圆形刻度盘/移动指针显示,操作限制和警告范围通过绿色和黄色条带以及红色线表示出来。

滑油量通过数字读出满油量的百分比显示得知。空中震动监视指示通过圆盘/指针显示。高压转子转速、低压转子转速、滑油量和发动机震动则直接通过发动机传感器显示。

The thrust control system consists of a hydro-mechanical MEC unit and a PMC unit mounted on each engine.The PMC is an electronic system with limited authority over the MEC. The PMC uses MEC power lever angle, N1 speed, and inlet temperature and pressure to adjust, or trim, the MEC to obtain the desired N1 speed. The PMC adjusts fuel flow as a function of thrust lever angle.

The PMC provides a constant thrust climb feature once the thrust lever is set as the beginning of climb. Thus, when thrust is set for the climb, the PMC automatically maintains that thrust throughout the climb profile with no further thrust lever adjustments. If the thrust lever is repositioned, the PMC maintains the setting corresponding to the new thrust lever angle. The PMC includes failure detection and annunciation modules which detect PMC failures and provide a signal to the crew. The PMC INOP light, the ENG system annunciator, and the MASTER CAUTION lights illuminate. For a PMC failure, the PMC can be selected OFF by a switch on the aft overhead panel. The engine speed is then controlled by the hydro-mechanical MEC only. The PMC INOP Light is suppressed below starter cutout engine speed.
推力控制系统包括一个液压机械式的主发动机控制单元和一个动力管理控制单元,这两个单元在每个发动机上都有安装。动力管理控制系统是一套电子系统,该系统有超控主发动机的适当权限。动力管理控制系统使用主发动机控制系统的操纵杆角度、高压转子速度、进气温度和进气压力来调整或配平主发动机控制系统以获得想要的低压转子速度。动力管理控制系统根据推力杆角度来调整燃油流量。

一旦在初始爬升时设置好推力杆,动力管理控制系统就可以提供连续的推力爬升性能。因此,当推力被设置为爬升状态时,动力管理控制系统就会在整个爬升剖面自动保持设置的推力而不用进一步调整推力杆。如果推力杆位置改变,动力管理控制则会按照新的推力杆角度来保持新的设置。动力管理控制系统包括故障探测和显示模块,它们会检测动力管理控制系统的故障并向机组发出信号。这时,动力管理控制系统失效灯、发动机系统信号器以及主警告灯会闪烁。当动力管理控制系统失效时,可以通过顶板后部的开关关闭。而后,发动机速度只由液压机械式的主发动机控制系统来控制。动力管理系统失效灯会在起动机关断引擎速度之下被关闭。

Fuel is delivered under pressure from fuel pumps located in the fuel tanks. The fuel enters the engine through the fuel shutoff valve. The fuel passes through the first stage engine fuel pump where pressure is increased. It then passes through two fuel/oil heat exchangers where engine oil heats the fuel. A fuel filter then removes contaminants. Fuel automatically bypasses the filter if the filter becomes saturated. Before the fuel bypass occurs, the fuel FILTER BYPASS alert illuminates on the fuel control panel.

The second stage engine fuel pump provides high pressure fuel to the main engine control (MEC). As the fuel leaves the second stage pump, a portion of the fuel is diverted to run the hydro-mechanical portion of the MEC. This fuel is filtered again and then routed through the fuel heater a second time. The MEC meters the correct amountof fuel to the combustor.
燃油通过油箱中燃油泵的压力进行输送,通过燃油关断活门进入发动机。燃油通过一级发动机燃油泵时压力增加,然后它通过两个燃油/滑油热交换器,在这里发动机滑油会加热燃油,而后燃油滤会移除污染物。如果油滤饱和,燃油会自动绕开油滤。在燃油旁通发生之前,燃油控制板上的燃油滤旁通警示灯会亮。

二级发动机燃油泵向主发动机控制系统提供高压燃油。当燃油离开二级燃油泵时,一部分燃油会用于运作主发动机控制系统的液压机械部分,这部分燃油会再次过滤然后第二次通过燃油加热器。主发动机控制系统会量取恰当数量的燃油输送进燃烧室。

The engine fuel shutoff valve and MEC fuel shutoff valve allow fuel flow to the engine when both valves are open. The valves are open when the engine fire warning switch is in OFF and the start lever is in IDLE.

Fuel flow is measured after the MEC fuel shutoff valve and is displayed on the center instrument panel. Fuel flow information is also provided to the FMS. (883 words)
当发动机燃油关断活门和主发动机控制系统燃油关断活门打开时会向发动机提供燃油。当发动机火情警报开关关闭以及启动杆在慢车位时这两个活门也会打开。

主发动机控制燃油关断活门测量燃油量并显示在中央仪表板上。燃油流量信息也会提供给飞行管理系统。
【飞行英语ICAO考试】答云友提问!Powerplant句型(二) - 临云行 - 153202gnruxc1xxv10r82n.jpg
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狼...之舞 评论于2018-6-19 15:32:21 |私信
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