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DA 40 NG AFM

Airplane

Description

7.10.2 ENGINE CONTROL UNIT / ECU

Engine Control and Regulation

The Electrical ECU is used to control the engine actuator (e.g. fuel injector) according to the engine sensor information. The ECU monitors, controls and regulates all important parameters for engine operation.

Sensors installed are:

'

-

Oil temperature (lubrication system engine)

/

OIL TEMP (G1000, if installed),

'

 

 

 

 

OT (MED, if installed)

'

-

Oil pressure (lubrication system engine)

/

OIL PRES (G1000, if installed),

'

 

 

 

 

OP (MED, if installed)

'

-

Coolant temperature /

COOLANT TEMP (G1000, if installed),

'

 

 

CT (MED, if installed)

 

'

-

Gearbox temperature /

GEARBOX (G1000, if installed),

'

 

 

GT (MED, if installed)

 

-Camshaft RPM (twice)

-Crankshaft RPM (twice)

-Fuel pressure in the common rail

-Manifold pressure

-Manifold air temperature

-Ambient air pressure

-Propeller governor / oil pressure

-POWER lever position (twice)

-Voltage

-Starter switch signal

-Fuel pressure

-VOTER switch signal

-ECU TEST switch signal

Doc. # 6.01.15-E

Rev. 1

15-Mar-2011

Page 7 - 45

 

 

 

 

Airplane

DA 40 NG AFM

Description

In accordance with the received signals and a comparison with the programmed characteristic diagrams the necessary inputs are calculated and transmitted by the following signal lines to the engine:

-Signal for propeller governor pressure valve

-Signal for the rail-pressure regulation valve

-Signal for each of the 4 injection nozzles

-Activation of the glow plugs

-Signal for the waste gate valve

'The following alerts are displayed on the PFD of the G1000 (if installed) or White Wire

'annunciator panel (if installed):

-Glow sparks active

-Status ECU A

-Status ECU B

'- Low fuel pressure warning (on the G1000, if installed)

The Electrical ECU consists of two similar ECUs. A VOTER switch is integrated in the Electrical ECU and proposes an ECU to control the engine regarding the ECU operating hours or in case of a failure the ECU with better engine control capability.

'A fault in one of the ECUs is indicated by a caution message (ECU A/B FAIL on the PFD

'(if G1000 is installed) or ECU A/B on the White Wire annunciator panel (if installed)). After

'the indication of the ECU A/B FAIL or ECU A/B caution message, the engine must be serviced.

Page 7 - 46

Rev. 1

15-Mar-2011

 

Doc. # 6.01.15-E

 

 

 

 

 

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