Inlet and exhaust Description A Air filter.
B226 Turbocharger speed sensor.
A109 Turbocharger module.
C Recycled exhaust gas cooler (EGR).
B 'Intercooler' air cooler.
D Variable geometry turbocharger (VGT).
B1 Intake air temperature sensor.
E Exhaust.
B51 Intake air pressure sensor.
F Particulate rebreathing.
B221 Cooled exhaust gas temperature sensor.
G Air compressor .
B222 Fresh compressed air temperature sensor.
M38 Exhaust gas recycling valve (EGR valve).
B223 Mixed intake air temperature sensor.
Z69 Air filter clogging sensor.
Technical description A venturi system on the exhaust line allows re-extracting dust contained in the air filter.
The EGR system reduces emissions of Nox (nitrogen oxide).
Exhaust gas can flow in both directions :
The quantity of recycled gas is evaluated from the intake air T°, recycled gas T° and mixed air T° information.
– To the turbocharger through the orientable fins. – To the exhaust gas recycling system EGR if the "M38" actuator is in open position. In this case, burnt gases are cooled by crossing (C), then mixed with fresh gases in the intake manifold.
The "A15" engine module manages the turbo's geometry in order to control this quantity of recycled gas.
Arion 640-510 – 06.2008 – GB
A1.49
