Introdution of engines
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This document discusses different types of engines including internal and external engines. It describes the main components of engines such as cylinders, cooling systems, fuel used, ignition methods, and cycles of operation. Specifically, it covers common engine configurations like inline, V-shaped, and radial engines. It also discusses the four-stroke and two-stroke cycles and subtypes of each. Finally, it lists conventional and alternative fuels that can be used in engines, including petroleum-based fuels as well as biofuels.
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The suction of air (also known as breathing or aspiration).
Mixing of the fuel with air after breaking the liquid fuel into highly atomized / mist form.
Igniting the air-fuel mixture with a spark (petrol engine).
Burning of highly atomized fuel particles which results in releasing / ejection of heat energy.
How does an Engine work?
The engine converts Heat Energy into Kinetic Energy in the form of „Reciprocating Motion‟. The expansion of heated gases and their forces act on the engine pistons. The gases push the pistons downwards which results in reciprocating motion of pistons.
This motion of the piston enables the crank-shaft to rotate. Thus, it finally converts the reciprocating motion into the 'Rotary motion' and passes on to wheels.
A petrol engine (known as a gasoline engine in American English) is an internal combustion engine with spark-ignition, designed to run on petrol (gasoline) and similar volatile fuels.
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- 2. •ENGINE Mechanical device which converts one form of energy into another form TYPE OF ENGINE 1 : INTERNAL ENGINE 2 : EXTERNAL ENGINE A: Reciprocating engine B : Rotary engine 1: METHOD OF IGITION spark-ignition engine (SI) compression-ignition engine (CI) 2 : CYCLE OF OPERATION Two strake engine Four stroke engine
- 3. 2 : THERMODYNAMICSCYCLE 6 : SPEED otto cycle high speed diesel cycle low speed dual cycle medium speed 3 : NO OF CYLANDERS APPLICATION single automotive engine multi aircraft engines marine application (I) In-line generator sets (ii) V Engine 4 : COOLING SYSTEM (iii) Radial air cooled (iv) Opposed Cylinder oil cooled (v) Opposed Piston 5 : FUEL USED petrol diesel gas
- 7. • 1. Four Stroke Cycle:- (a) Naturally Aspirated (b)Supercharged/Turbocharged • 2. Two Stroke Cycle:- (a) Crankcase Scavenged (b) Uniflow Scavenged (i) Inlet valve/Exhaust Port (ii) Inlet Port/Exhaust Valve (iii) Inlet and Exhaust Valve May be Naturally Aspirated Turbocharged
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