Engines Introduction
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Transcript of Engines Introduction
INTERNAL COMBUSTION ENGINES AN OVERVIEW
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
Simple external and internal combustion engine
IC ENGINE CLASSIFICATION
• Number of cylinders. a) Single-cylinder. b) Multi-cylinder.
• Arrangement of the cylinders. 1. In-line cylinders. 2. V-shaped cylinders. 3. Opposed cylinders. 4. Horizontal cylinders. 5. Radial cylinders. 6. Vertical cylinders.
• Type of fuel used. 1 Petrol engine. 2 Diesel engine. • Type of cooling system.
1. Air-cooled. 2. Water-cooled.
• Stroke of the engine.
1. Four-stroke engine. 2. Two-stroke engine. 3. Rotary engine.
• Application of the engine. 1. Constant speed engine. 2. Variable speed engine.
• Types of ignition system. 1. Spark-ignition. 2. Compression -ignition.
IC ENGINE CLASSIFICATION BASED ON ARRANGEMENTOF CYLINDERS
ENGINE CONSTRUCTION
The engine works on 4-stroke, 5-event principle, viz.
Suction
Compression &
Combustion
Expansion
Exhaust
ACTION INSIDE SI ENGINE
COMBUSTION CHAMBER
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.
WORKING PRINCIPLE OF SI ENGINE (4- STROKE)
SI ENGINE
MULTI CYLINDER SI ENGINE
2 STROKE ENGINE
WORKING PRINCIPLE OF SI ENGINE (2- STROKE)
SCAVENGING
WORKING OF SI ENGINE
4-Stroke Cycle Spark Ignition Engine
2-Stroke Cycle Spark Ignition Engine
4-Stroke Cycle Spark Ignition Engine
2-Stroke Cycle Spark Ignition Engine
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.
.
First CI Engine built by Diesel
AUTOMOTIVE CI ENGINE
WORKING PRINCIPLE OF CI ENGINE (4- STROKE)
SECTION OF (2- STROKE) CI ENGINE
WORKING PRINCIPLE OF CI ENGINE (2- STROKE)
VALVE TIMING DIAGRAM
VALVE TIMING DIAGRAM FOR SI ENGINE
VALVE TIMING DIAGRAM FOR CI ENGINE
PORT TIMING DIAGRAM FOR SI ENGINE