ENGINE <NON-TURBO>
-
Control System
I-49
Exhaust Gas Recirculation Monitor
WlAK45AA
L
Background
Exhaust Gas Recirculation (EGR) is a method of
reduce the high cylinder operating temperatures
reducing oxides of nitrogen
(NOx)
emissions by
where
NOx
is most likely to occur. Lower combustion
introducing non-combustible exhaust gases into the
chamber temperatures result in lower
NOx
emis-
combustion chamber. These gases absorb heat and
sions.
Upstream (primary)
02
sensor
--.
.
Exhaust gas
AFU0006