User Manual

Chapter 4
BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER
24
C - OPERATION AT LOW ENGINE SPEED
SDI007D
12
14
The gas flow passing through the exhaust turbine (14) is low.
To increase the turbocharging pressure, a maximum amount of energy must be
converted in the turbine.
The exhaust gases must be made to pass through a small cross section: the
finned diffuser piston (12) is closed.
Note: The finned diffuser piston is closed when it is not controlled
pneumatically.
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