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3.5 ENGINE SYSTEMS AND ITS FUNCTION:
As we all know, Diesel engine is a prime mover developing useful power. Air and fuel is required to produce
power. Lubrication is necessary for the moving parts of the engine. Continuous cooling is required to
dissipate heat generated during combustion. Electrical system is required for engine starting, battery
charging and sensing of critical engine operating parameters.
The construction of Eicher diesel engine is divided in to five parts as below.
1 Air intake and Exhaust System
2 Lubrication System
3 Fuel System
4 Cooling System
5 Electrical System
The below section provides details of function, key components and working principle of respective system
to understand better about Engine aspects.
3.5.1 AIR INTAKE AND EXHAUST SYSTEM
TURBO CHARGED INTERCOOLED ENGINES:
The function of air system is to supply clean, cool and sufficient quantity air required for proper combustion
of the fuel which results in designed power output of the engine and maintains emissions as per statutory
norms.
Air intake system facilitates cleaning of air, induction of air, compression of air through turbocharger and
cooling by intercooler.
Air is sucked from atmosphere and passed through the Air filter to restrict dust and other foreign particles
from entering into air intake system. Clean air is then induced and compressed by the turbocharger
compressor wheel. Turbocharger increases the temperature of the air. This high temperature air is then
passed through an intercooler which decreases its temperature. As air inducted cools down its density is
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