User Manual

Chapter 5
BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER
32
II - COMPONENTS COMMON WITH DOCUMENT "BOSCH EDC 15C2 HDI
INJECTION SYSTEM"
Components common with the document:
• air flowmeter (1310),
• exhaust gas recycling valve (EGR),
• recycling regulation electrovalve (EGR) (1253).
III - SPECIFIC COMPONENTS
Specific features of the DW12 TED4 engine:
• water/exhaust gas exchanger (EGR),
• recycling regulation electrovalve (EGR) (1253),
• throttle housing (EGR),
• throttle housing control electrovalve (EGR) (1263).
IV - WATER/EXHAUST GAS EXCHANGER (EGR)
A - ROLE
The water/exhaust gas heat exchanger cools the recycled exhaust gases let into
the cylinders.
B - LOCATION
Location: on the rear of the cylinder head (bulkhead side).
V - THROTTLE HOUSING (EGR)
A - ROLE
In addition to the EGR valve, the throttle housing, depending on its position, is
used to improve exhaust gas recycling. The throttle housing is controlled
progressively and using a cartographic map (injection ECU).
Warning: The throttle housing is open when it is not controlled pneumatically.
B - LOCATION
The throttle housing is located at the inlet to the inlet manifold.
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