User Manual

Chapter 4
BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER
22
V - VARIABLE GEOMETRY TURBOCHARGER
A - ROLE
The turbocharger is used to turbocharge the air entering the engine.
The variable geometry turbocharger is used:
• to increase the speed of the exhaust gases which strike the turbine at low
engine speeds,
• to reduce the speed of the exhaust gases which strike the turbine at high
engine speeds,
• to adapt the turbine to a variation in exhaust gas flow.
B - DESCRIPTION
SDI006D
g
f
16
29
16
12
11
14
14
11 - Finned diffuser piston control diaphragm: vacuum controlled
12 - Finned diffuser piston
14 - Exhaust turbine
16 - Inlet air turbine
29 - Thermal housing
f - Gases from the exhaust manifold
g - To inlet manifold
The turbocharger has two separate chambers.
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