AIRCRAFT
Engine Fuel and Control
DA 42 NG AMM
Page 4
15 Mar 2018
73-00-00
Doc # 7.02.15
Rev. 4
2. Description and Operation
Figure 1 shows the schematic diagram for DA 42 NG with the AE E4-B engine. Figure 2 shows the
schematic diagram for DA 42 NG with the AE E4-C engine (if MÄM 42-600 is installed).
The power generation system has two main parts:
)
An air intake system. This system supplies air from the inlet to the air filter to the engine inlet
manifold.
)
An engine fuel system. The engine fuel system takes fuel from the airplane fuel system and injects
it into the cylinders.
A. Air Intake System
The air intake system has an air filter located on the right of each engine nacelle, just forward of
the firewall. If MÄM 42-600 is installed, the air intake system has an air filter located in the aft
middle of the engine compartment. The filter attaches to the forward face of the alternate air valve.
The alternate air valve also has an inlet direct from the engine compartment. The valve can select
either filtered air or warm, unfiltered air. Refer to Section 71-60 for more data on the air filter and
alternate air valve. If MÄM 42-600 is installed, refer to Section 71-61 for more data on the air filter
and alternate air valve.
The outlet from the alternate air valve connects to the turbo charger. The outlet from the turbo-
charger connects to an intercooler. The outlet from the intercooler connects to the engine intake
manifold. Refer to Section 81-00 for more data on the turbo charger and intercooler. If MÄM 42-600
is installed refer to Section 81-01 for more data on the turbo charger and intercooler.
B. Engine Fuel System
The fuel from the main tank flows through the pre-filter to the electrically driven low pressure fuel
pumps. These fuel pumps supply the high pressure pump with the required fuel pressure and fuel
flow. A fine fuel filter is installed upstream of the high pressure pump to assure clean fuel supply
to the engine.
The high-pressure pump supplies fuel via the common rail to the injectors. A combined pressure
relief and regulator valve at the end of the common rail controls the fuel pressure within the rail.
Surplus fuel returns to the airplane main fuel tanks. The fuel returning from the engine is hot. The
hot fuel passes through a fuel cooler located at the rear of each engine nacelle (in the engine
compartment, if MÄM 42-600 is installed). From the fuel cooler the fuel returns to the main fuel
tanks.
Summary of Contents for DA 42 NG
Page 933: ...AIRCRAFT DA 42 NG AMM Fuel Doc 7 02 15 Rev 4 28 TITLE Page 1 15 Mar 2018 CHAPTER 28 FUEL ...
Page 1459: ...AIRCRAFT DA 42 NG AMM Lights Doc 7 02 15 Rev 4 33 TITLE Page 1 15 Mar 2018 CHAPTER 33 LIGHTS ...
Page 1711: ...AIRCRAFT DA 42 NG AMM Doors Doc 7 02 15 Rev 4 52 TITLE Page 1 15 Mar 2018 CHAPTER 52 DOORS ...
Page 1853: ...AIRCRAFT DA 42 NG AMM Wings Doc 7 02 15 Rev 4 57 TITLE Page 1 15 Mar 2018 CHAPTER 57 WINGS ...
Page 2071: ...AIRCRAFT DA 42 NG AMM Engine Doc 7 02 15 Rev 4 72 TITLE Page 1 15 Mar 2018 CHAPTER 72 ENGINE ...
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