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FUEL FLOW Fuel flow US gal/hr
OIL TEMP Engine oil temperature °C
OIL PRES Oil pressure bar
COOLANT TEMP Coolant temperature °C
FUEL TEMP. Fuel temperature °C
FUEL QTY GAL Fuel quantity US gal
VOLTS Volts V
AMPS Ampères A
GEARBOX Gearbox temperature °C
Doc. No. 7.01.05-E Rev. 5 15-Nov-2007 Page 7 - 33
7.9.5 FUEL SYSTEM
General
'
TAE 125
' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
fuel tank vent
sensor
low fuel sensor
probe switch probe
Page 7 - 34 Rev. 5 15-Nov-2007 Doc. No. 7.01.05-E
Fuel is stored in the tanks which are located in the wings.
Normally fuel for the right engine is taken from the right wing main tank and for the left engine from the left wing main tank.
On each engine fuel is injected with high pressure directly into the cylinders. The injection nozzles (one per cylinder) are supplied with fuel by the common rail. Pressure inside the rail is generated by a high pressure pump which receives fuel from a low pressure pump. Depending on the power setting the rail pressure is controlled by the ECU through an electric valve. Both pumps are powered mechanically by the engine. Fuel that is not injected is fed back into the appropriate wing tank.
Both sides of the fuel system are interconnected by crossfeed lines.
' In each engine nacelle an auxiliary fuel tank may be installed (O.M 42-056 carried out).
Doc. No. 7.01.05-E Rev. 5 15-Nov-2007 Page 7 - 35
Fuel selector valves
For each engine one fuel selector valve is provided. The control levers for the fuel selector valves are situated on the center console behind the power levers. The positions are ON, Crossfeed and OFF. During normal operation each engine takes the fuel from the tank on the same side as the engine. When Crossfeed is selected, the engine will draw fuel from the tank on the opposite side in order to extend range and keep fuel weight balanced during single engine operation. With the fuel selector valve both the feeding and the return line are switched.
The desired position is reached by pulling the lever back. To reach the OFF position a safety guard must be twisted. This is to ensure that this selection is not made unintentionally.
NOTE
If one engine is inoperative the fuel selector valve for this engine must be in the OFF position.
CAUTION
Do not operate with both fuel selector valves in Crossfeed Position. Do not take-off with a fuel selector valve in Crossfeed Position.
CAUTION
Do not shut down an engine with the fuel selector valve. The high pressure fuel pump can otherwise be damaged.
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本文链接地址：钻石42飞机飞行手册 DA 42 Airplane Flight Manual(104)
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