EGR EXHAUST GAS RECYCLE SYSTEM
The exhaust gas can be partially recycled to cylinders to reduce maximum temperature values of combustion that produce nitrogen
oxides (NOx).
The exhaust gas recycle system (EGR) reduces combustion temperature and therefore is an efficient NOx emission control system.
Internal EGR operating on the intake valves (for F5CE9454, F5CE9484 engines)
The specific design of suction cams of the internal EGR system allows part of exhaust gas to be recycled to engine cylinders.
This type of EGR, called internal EGR, is not equipped with any electronic control, the system is always active. Its configuration requi-
res no additional parts such as control valves, pipelines or heat exchangers therefore engine profile remains unchanged
Besides main lobe, suction cam has an additional lobe as to configuration without EGR. During concerned cylinder exhaust phase,
this lobe allows a shaft advanced opening of intake valve (*). In this way, part of the exhaust gas is trapped in the suction duct and
later, during cylinder suction phase, this gas is recycled to cylinder inlet for combustion phase..
122430
X. Cam rotation angle (degrees) - Y. Cam lift mm
Figure 14
Intake cam profile
*
14
SECTION 1 - GENERAL SPECIFICATIONS
F32 SERIES
Base - April 2009 Print P2D32F005 E
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