FADEC全权限数字式电子控制专用课件.pptVIP

* * * * HSA lights cont’d PPWR FAIL: Primary Battery is not being charged, will be accompanied by EBAT FAIL…you will start draining both batteries and have at least 60 minutes to land. Your secondary battery will only power FADEC, AI, and Turn Coordinator EBAT FAIL: Backup Battery not being charged, everything can run from Primary Power Source/Battery HSA Lights cont’d FUEL PUMP: illuminates when Fuel Boost Pump Mode Switch is in ON or OFF. If this light is illuminated it means that you are manually controlling the fuel pump or that the fuel pressure is out of the 20-40 psi range. Illuminates for electric driven fuel pump as well as engine driven pump WOT: below HSA panel. Illuminates when Throttle Position Switch (TPS) is contacted (full throttle), signal sent to ECU that max power is req’d which causes FADEC to set fuel to air ratio for Best Power FADEC Ignition System Consists of high voltage harness and spark plugs (2 plugs per cylinder) Employs a waste spark ignition system- plugs fire once on compression and once on exhaust... this keeps plugs clean ECU#1 fires top and bottom spark plugs for cylinders 1 2 ECU#2 fires top and bottom spark plugs for cylinders 3 4 Power Supplies Primary Power Source (PPS)- 14v 60amp alternator and 12v 25Ah Lead Acid type battery (located aft baggage compartment) Secondary Power Source (SPS)- 12v 7Ah Lead Acid type battery PPS and SPS have separate set of breakers and the power supply circuits are separated Battery condition monitor will illuminate HSA with PPWR FAIL or EBAT FAIL to alert pilot of possible power supply loss Power Supplies cont’d FADEC operates off of primary power source with alternator indefinitely Alternator fails- FADEC will use primary battery until 12v then will cycle between using PPS and SPS every volt (FADEC always looking for best power source) until batteries are drained FADEC can operate on SPS (aka backup or emergency battery) for at least 1 hour SPS is only to supply power to FADEC (AI an