ENGINE
L3301, L3901, L4701, WSM
1-M20
[2] EGR COOLER
The EGR (Exhaust Gas Recirculation) cooler (1) is
used to lower combustion temperature and efficiently
cool EGR gas, with the aim of reducing the NOx that is
in the exhaust gas of diesel engine.
The EGR cooler (1) is placed between the cylinder
head and the EGR valve and returns the cooled exhaust
gases to the engine suction side.
The EGR cooler (1) has resistant to clogging up,
compact and efficient tubes (2) internally.
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[3] EGR VALVE
Water Cooled EGR Valve
This is a device that regulates EGR gas flow. The
degree the valve is open is detected using a lift sensor
and a motor is used to set this to the degree of open
calculated using signals including the engine speed.
Also, passing engine coolant through the housing
enables controlling temperature rise of the EGR valve.
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EGR Valve Lift Sensor
How far the EGR valve is open is detected by a
contact type of position sensor that detects the
movement of the motor's shaft. The motor's shaft opens
and closes the valve by changing the rotation of the
motor into linear motion via a screw deceleration
mechanism.
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(1) EGR Cooler
(2) Tube
A: Coolant Inlet Port
B: Coolant Outlet Port
(1) CAN H
(2) CAN L
(3) GND (−)
(4) Power (+)
(5) Exhaust Gas Flow
(6) CAN Communication Data
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