Diamond DA 42 NG, Maintenance Manual

Page: 2233 / 2339

AIRCRAFT
DA 42 NG AMM Turbo Charger
Doc # 7.02.15
Rev. 4
81-00-00
Page 3
15 Mar 2018
3. Operation
Figure 1 shows the turbo charger system schematic diagram.
When the engine is running the exhaust gases from the engine flow through a manifold to the turbo
charger turbine. A waste gate in the turbo charger turbine inlet can open to allow some of the exhaust
gases from the engine to bypass the turbine and flow directly in to the engine exhaust pipe. The waste
gate opening is controlled by the engine EECU.
Ambient air flows through the air filter (normal operation) or from the engine nacelle (alternate air
operation) into the turbo charger compressor. The air gains heat while being compressed in the turbo
charger. The hot compressed air flows through an aluminum tube and a flexible hose to the intercooler.
In the intercooler the hot compressed air is cooled down.
To provide cooling of the hot compressed air the intercooler is supplied with cold outside air via a
composite air intake duct.
The cool compressed air from the intercooler flows through a flexible hose to the engine intake
manifold.