Exhaust Gas Recirculation (Egr) System (Turbo) - Mazda 626 MX-6 Workshop Manual

4B
EGR SYSTEM
EXHAUST GAS RECIRCULATION (EGR) SYSTEM
Solenoid
valves
EGR position
sensor
EGR
control
valve
This system introduces exhaust gas into the intake manifold to reduce NOx in the exhaust gas.
It operates depending on the throttle valve opening, driving condition, engine coolant temperature
(above 40°C, 104°F), and radiator coolant temperature (above 17°C, 63°F).
4B—90
Vent side
1
Vacuum
V a c u u m
side chamber
r
f
by
Throttle sensor
c
3
O
E
to
cc
o
LU
Engine coolant temperature
r
Engine control unit
Water thermo
sensor
Air flow meter
Water
) thermo
switch
Distributor
(Ne signal)
86U04B-105