ENGINE
L3540-II, L4240-II, L5040-II, L5240-II, L5740-II , WSM
1-M3
[1] EGR VALVE
When the temperature of coolant rises above 65 °C
(149 °F), the thermo valve (1) opens and boost pressure
(B) flows to EGR valve.
This boost pressure (B) pushes down EGR valve's
diaphragm (5), and opens valve (16). Then exhaust gas
cooled by EGR cooler returns to the intake manifold.
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[2] EGR COOLER
The EGR cooler (1) is set between the exhaust
manifold (2) and the intake manifold of the engine and
returns the cooled exhaust gas to the engine suction
side.
The EGR cooler (1) has resistance to clogging up,
compact and efficient tubes (3) internally.
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(1) Thermo Valve
(2) Diaphragm Cover
(3) Retainer
(4) Diaphragm Plate
(5) Diaphragm
(6) Diaphragm Stay
(7) Valve Spring
(8) Diaphragm Plate
(9) Plate
(10) Plate
(11) Insulator
(12) Valve Shaft Bush
(13) Filter
(14) Shaft
(15) Sheet
(16) Valve
(17) Housing
A: Boost Pressure (from
Boost Compensator /
Intake Manifold)
B: Boost Pressure (from
Thermo Valve)
C: Cooled EGR Gas (from
EGR Gas)
D: Cooled EGR Gas (to Intake
Manifold)
(1) EGR Cooler
(2) Exhaust Manifold
(3) Tubes
(4) Coolant Passage
A: Coolant Outlet Port
B: Coolant Inlet Port
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