TECHNICAL TERMS OF I.C ENGINES EXPLAINED (PART - 2)

1.)COMBUSTION SWIRL – Air motion created by the ejection of the combustion products from the precombustion chamber into the clearance space above the piston.

2.)COMMON RAIL SYSTEM – The fuel injection system which consists of a high pressure pump which distributes the fuel to a common rail or header to which injectors are connected.

3.)CONSTANT PRESSURE COMBUSTION – Combustion which occurs without a change in pressure. In an engine, this is obtained by a slower rate of burning than with constant volume combustion.

4.)DIESEL KNOCK – Sudden, steep pressure rise due to instantaneous
uncontrolled combustion of the fuel that has got accumulated during delay period. The pressure wave hitting piston and cylinder walls produce knocking sound.

5.)ENGINE DERATING – Reducing maximum fuel flow to the engine.

6.)GLOW PLUG– is an electrical heater, which is switched on for quick starting
in cold weather. Its heating element protrudes directly into the combustion chamber in DI engines.

7.)INJECTION TIMING – Crank angle with respect to TDC at which fuel
injection starts, during the compression stroke.

8.)PHYSICAL DELAY PERIOD – The time that elapses between the begining
of fuel injection and the beginning of preflame reactions.

9.)PILOT INJECTION– is the early injection of a small quantity of fuel to
initiate combustion of the injected main fuel, in a diesel engine.

10.)TURBULENCE CHAMBER – A combustion chamber connected to the
cylinder through a throat. Fuel is injected across the chamber and turbulence is produced in the chamber by the air entering during compression.