Egr Valve; Egr Solenoid Valve; Bpt - Subaru SVX 1992 Manual

2-1 [08A2) EMISSION CONTROL SYSTEM AND VACUUM FITTING
2. EGR VALVE
The EGR valve is situated between the exhaust manifold
and collector . After opening EGR solenoid valve, EGR
valve is opened for receiving throttle port pressure on
diaphragm . Then, part of the exhaust gas is recirculated
into collector chamber .
Intake manifold
pressure
I l k
IN
OUT
C2-054
Fig. 6
3. EGR SOLENOID VALVE
The EGR solenoid valve is situated between the throttle
body and EGR valve . EGR solenoid valve is opened by
a signal emitted from the ECU . Therefore, throttle port
pressure is transmitted to diaphragm of EGR valve.
4. BPT
The EGR solenoid valve is either ON or OFF . The EGR
vacuum controller performs control corresponding to a
change in the engine operating condition after the
solenoid valve is opened .
Throttle body f- R
EGR solenoid- p
Q
-~ EGR
valve
valve
0
0
i
EGR port
(Exhaust gas pressure)
C2-056
Fig. 7
8