ENGINE
L3301, L3901, L4701, WSM
1-M12
[4] INJECTOR
General
The injectors inject high-pressure fuel sent from the
rail into the combustion chamber of the engine.
The injections are controlled by the signal of engine's
ECU to produce the ideal timing, amount of fuel, mixture
and spray.
The injector injects a finely turned spray in three
pulses during the combustion stage. First a small
amount is injected, mitigating the effect of the initial burn
and reducing NOx (oxides of nitrogen) and noise. The
main injection follows with the real burn, and in the last
stage, a diffuse combustion is induced, thus reducing
particulate matter (PM) generated by the main injection.
9Y1211012ENM0018US0
(1) Engine ECU
(2) Rail Pressure Sensor
(3) Rail
(4) Supply Pump
(5) TWV (Two-way Valve)
(6) Discharge Orifice
(7) Control Chamber
(8) Command Piston
(9) Needle Valve
(10) Nozzle
(11) Injection Amount
(12) T.D.C (Top Dead Center)
(13) B.D.C (Bottom Dead Center)
(14) Crank Angle
A: Pre-injection
B: Main Injection
C: After Injection
D: Post Injection
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