303-08B-215 Engine Emission Control — Diesel Engine 303-08B-215
DESCRIPTION AND OPERATION
E7849 EN 09/2001 2002 Bantam
Engine Emission Control
Item
Description
1 Exhaust manifold to exhaust gas
Recirculation (EGR) valve tube
2 EGR vacuum regulator solenoid
3 EGR valve
Positive Crankcase Ventilation
The positive crankcase ventilation system
recycles crankcase gases back through the
engine where they mix with the incoming air
charge. All the combustion gases, which enter
the crankcase, flow through hoses out of the
valve cover into the intake air system. It is a
completely sealed system, which helps to reduce
hydrocarbon emissions from the engine.
Exhaust Gas Re-circulation
The exhaust gas re-circulation system reduces
the formation of NOx (oxides of nitrogen) by
recycling measured quantities of exhaust gas
back through the engine where they mix with the
incoming air charge.
The exhaust gas re-circulation vacuum regulator
solenoid is controlled by the powertrain control
module with ground pulses. This regulates the
amount and duration of the signal supplied to the
exhaust gas re-circulation valve and therefore the
valve lift and opening times are controlled.
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