four stroke ic engine
TRANSCRIPT
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Presentation By:Panchal Brothers
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Engine is a device which transforms one form of energy
into the other form.
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Heat engine is a modified form of engine used for transforming chemical energy of fuel into
thermal energy and subsequently for producing work.
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A four-stroke engine: Is an internal combustion engine Converts gasoline into motion Is the most common car engine type Is relatively efficient Is relatively inexpensive
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Two-stroke enginesDiesel enginesRotary enginesTurbine enginesSteam engines
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Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
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A. Intake Valve- opens at the proper time to let in air and fuel.
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B. Valve Cover- Protects the valves and the valve springs. Keeps dirt out and lubricating oil in.
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C. Intake Port- the passageway in a cylinder head for the fuel and air to pass through.
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D. Head- a platform containing most of the parts of the combustion chamber.
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E. Coolant- circulating water and antifreeze to keep the temperature regulated.
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F. Engine Block- cast in one piece. The basis for most of the parts of the engine.
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G. Oil Pan- where the oil is collected and recirculated.
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H. Oil Sump- the collected oil primarily for lubricating the crankshaft and rod bearing
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I. Camshaft- a round shaft with lobes, that rotates to open and close the fuel and exhaust valves.
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J. Exhaust Valve- open at the proper time to release the exhaust
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K. Spark Plug- a device, inserted into the combustion chamber for firing an electrical spark to ignite air-fuel mixture
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L. Exhaust Port- the passageway in a cylinder head, for the exhaust to pass through
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M. Piston- the part of the engine that moves up and down in the cylinder converting the gasoline into motion
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N. Connecting Rod- links the piston to the crankshaft.
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O. Rod Bearing- used to reduce friction to the rod and crankshaft
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P. Crankshaft- converts the up and down motion of the piston into a turning, or rotating motion
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1. 2. 3. 4.
IntakeCompressionCombustion
Exhaust
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Intake- process of filling the cylinder with the proper air-fuel mixture through the intake valve.
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Compression- the process of compressing the air-fuel mixture in the cylinder to make it more combustible
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Combustion-the process of igniting the compressed air-fuel mixture to create motion and the over all power of the engine.
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Exhaust- the process of releasing the exhaust out of the cylinder through the exhaust valve.
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