ENGINE
L3560, L4060, L4760, L5060, L5460, L6060, WSM
1-M21
6. EGR SYSTEM
[1] OVERVIEW
The EGR (Exhaust Gas Recirculation) system is a device that captures a part of the exhaust gas and returns it
to the intake side reducing the amount of oxygen entering the engine and lowers combustion temperature
suppressing generation of nitrogen oxides (NOx).
The EGR being used on this engine is electronic and is made up of an EGR cooler (4), EGR lift sensor (5), EGR
valve motor (6), and reed valve (15).
The exhaust gas that is returned to the intake side (hereafter EGR gas) is cooled in the EGR cooler (4), adjusted
to a suitable flow by an EGR valve motor that is controlled by the engine ECU, and is sent to the intake manifold (14).
The reed valve prevents reverse flow of air from the air cleaner (1) to the EGR valve motor (6).
9Y1210824ENM0035US0
(1) Air Cleaner
(2) Turbocharger
(3) EGR Pipe
(4) EGR Cooler
(5) EGR Lift Sensor
(6) EGR Valve Motor
(7) Injector
(8) Glow Plug
(9) Boost Sensor
(10) Coolant Temperature Sensor
(11) Crankshaft Position Sensor
(12) Camshaft Position Sensor
(13) Exhaust-manifold
(14) Intake-manifold
(15) Reed Valve
(16) Intake Throttle Valve
A: Exhaust Gas Flow
B: Intake Air Flow
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