Operation Section
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Diesel Engine
Engine and After-treatment System
DM03P/V Diesel Engine Introduction
The DM03P/V engine which is a high-power engine in compliance with the Required Engine Emissions Standard is
provided with various systems(DM03P: T4F, DM03V: Stage5). The DM03P/V engine is equipped with a turbo-charger
intercooler system that compresses and cools air and feed it to the intake manifold. Here, AMF sensor and
temperature/pressure sensors detect the air condition and transmit the data to the ECU which controls fuel injection rate
according to the engine load, speed and air quantity. Fuel is supplied to a high pressure pump through a fuel filter. The fuel
compressed in the high pressure pump is transferred to common rail and injected by injectors in controlled order. Surplus
fuel after injection returns to the fuel tank via a return hose. The exhaust gas recirculation (EGR) system controls the
quantity of recirculating air according to the engine speed and load in order to comply with applicable exhaust gas emission
standards.
The DOC (Diesel Oxidation Catalyst) uses a chemical process to reduce hydrocarbons (HC) and carbon monoxide (CO).
DPF (Diesel Particulate Filter),only for Stage5, is after-treatment to trap the PM(Paticulate Matters)/Soot in exhaust gas.
DPF Regeneration and Ash Cleaning is regualy required to maintain proper performance.
The figure below shows the positions of the electronic control system and sensors
NOTICE
It is normal to hear a slight operating sound after Key Switch On/Off.
This is the ECU checking the actuator before/after engine running.
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