Engines Introduction

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INTERNAL COMBUSTION ENGINES AN OVERVIEW

description

classification and working of engine is explained

Transcript of Engines Introduction

Page 1: Engines Introduction

INTERNAL COMBUSTION ENGINES AN OVERVIEW

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Engine

• Transforms one form of energy into another• Heat engine converts chemical energy into thermal energy which is turned utilized to do mechanical work•Heat engine two types :-

External combustion engine Internal combustion engine

•IC engine most widely used in automobiles

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Simple external and internal combustion engine

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IC ENGINE CLASSIFICATION

• Number of cylinders. a) Single-cylinder. b) Multi-cylinder.

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• Arrangement of the cylinders. 1. In-line cylinders. 2. V-shaped cylinders. 3. Opposed cylinders. 4. Horizontal cylinders. 5. Radial cylinders. 6. Vertical cylinders.

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• Type of fuel used. 1  Petrol engine. 2  Diesel engine. • Type of cooling system.

1.  Air-cooled. 2.  Water-cooled.

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• Stroke of the engine.

1. Four-stroke engine. 2. Two-stroke engine. 3. Rotary engine.

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• Application of the engine. 1. Constant speed engine. 2. Variable speed engine.

• Types of ignition system. 1. Spark-ignition. 2. Compression -ignition.

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IC ENGINE CLASSIFICATION BASED ON ARRANGEMENTOF CYLINDERS

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ENGINE CONSTRUCTION

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The engine works on 4-stroke, 5-event principle, viz.

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Suction

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Compression &

Combustion

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Expansion

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Exhaust

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ACTION INSIDE SI ENGINE

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COMBUSTION CHAMBER

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Nicolaus August Otto Born June 10, 1832 - Died

January 26, 1891 Gas-Motor Engine Patent No. 4315

Inducted 1885

Inventor of the four-stroke spark-ignition internal combustion engineIn 1876 Otto built an engine in which air-fuel mixture could be compressed and ignited by a spark.

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WORKING PRINCIPLE OF SI ENGINE (4- STROKE)

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SI ENGINE

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MULTI CYLINDER SI ENGINE

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2 STROKE ENGINE

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WORKING PRINCIPLE OF SI ENGINE (2- STROKE)

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SCAVENGING

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WORKING OF SI ENGINE

4-Stroke Cycle Spark Ignition Engine

2-Stroke Cycle Spark Ignition Engine

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4-Stroke Cycle Spark Ignition Engine

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2-Stroke Cycle Spark Ignition Engine

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Rudolf Diesel(1858 - 1913)Oil Engine German

Patent No. 67207 Inducted 1919

Inventor of the four-stroke Compression-ignition internal combustion engine

In 1893 Diesel was issued a patent for a proposed engine, in which air would be compressed so much that the temperature would far exceed the ignition temperature of the fuel.

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First CI Engine built by Diesel

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AUTOMOTIVE CI ENGINE

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WORKING PRINCIPLE OF CI ENGINE (4- STROKE)

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SECTION OF (2- STROKE) CI ENGINE

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WORKING PRINCIPLE OF CI ENGINE (2- STROKE)

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VALVE TIMING DIAGRAM

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VALVE TIMING DIAGRAM FOR SI ENGINE

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VALVE TIMING DIAGRAM FOR CI ENGINE

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PORT TIMING DIAGRAM FOR SI ENGINE


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