How does a gasoline engine work
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How Does a Gasoline Engine Work? PowerPoint PPT Presentation


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How Does a Gasoline Engine Work?. by Ryan Cramer… 6 th grade. How Gasoline Powers an Engine. A gasoline engine works on the concept of Internal Combustion Internal Combustion is the burning of a mixture of air and fuel inside the engine cylinders to create power to move the vehicle

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How Does a Gasoline Engine Work?

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How does a gasoline engine work

How Does a Gasoline Engine Work?

by Ryan Cramer… 6th grade


How gasoline powers an engine

How Gasoline Powers an Engine

  • A gasoline engine works on the concept of Internal Combustion

  • Internal Combustion is the burning of a mixture of air and fuel inside the engine cylinders to create power to move the vehicle

  • Four Stroke Cycle (also know as the Otto Cycle): includes intake, compression, power and exhaust strokes

www.howstuffworks.com/engine


Brief history of the internal combustion engine

Brief History of the Internal Combustion Engine

  • 1860- Jean Joseph Etienne Lenoir: designed the first gas-fired internal combustion engine. His design included cylinders, pistons, connecting rods and a flywheel.

http://www.outrefranc.com/shows/ol/img/lenoir.jpg


History of the internal combustion engine cont

History of the Internal Combustion Engine Cont.

  • 1862- Nikolaus Otto: was the first to build and sell the four-cycle engine. His design at this time was a free-piston, non-compression engine.

  • 1876- Otto improved on his previous design and developed the first four-cycle, internal combustion engine that compressed the air and fuel mixture prior to the power stroke or combustion.

http://www.vezess.hu/hirek/180_eves_lenne_benzinmotor/37544/


History of the internal combustion engine cont1

History of the Internal Combustion Engine Cont.

  • 1885/1886 Karl Benz: Developed and patented the first high-speed, four stroke engine with a controlled exhaust valve, spark plug, high-voltage electrical vibrator and water cooling system. This is considered by some to be the “birth” of the first automobile.

http://imguol.com/2012/09/24/benz-model-1-1348527291472_615x470.jpg


Main components of the modern internal combustion engine

Main Components of the Modern Internal Combustion Engine

  • Engine Block & Cylinder Head

  • Cylinders

  • Crankshaft

  • Connecting Rods

  • Pistons

  • Spark Plugs

  • Fuel Injectors

  • Intake & Exhaust Valves

  • Cam Shaft

  • Timing Belt/Chain

www.carbibles.com


The four stroke cycle

The Four Stroke Cycle

  • Intake Stroke

  • Compression Stroke

  • Power Stroke

  • Exhaust Stroke

ffden-2.phys.uaf.edu

http://en.wikipedia.org/wiki/4_stroke_engine


Step 1 intake stroke

Step 1: Intake Stroke

  • 1. The intake stroke begins by the intake camshaft rotating which make some valves open and some close.

  • 2. As the piston moves downward, the chamber fills with a mixture of air and fuel while the exhaust valve remains closed. When the piston reaches the lowest point, the intake valve closes.

http://xorl.wordpress.com/2011/03/05


Step 2 compression stroke

Step 2: Compression Stroke

  • 1. Both the intake and exhaust valves close.

  • 2. The fuel and air mixture is pushed upward by the piston while compressing the air and fuel.

http://xorl.wordpress.com/2011/03/05


Step 3 power stroke

Step 3: Power Stroke

  • 1. Both the intake and exhaust valves remain closed and the piston is at the top of the chamber.

  • 2. The power stroke begins when the spark plug fires and ignites the compressed fuel and air mixture.

  • 3. The pressure of the explosion will force the piston in a downward stroke.

  • 4. The controlled explosion (or combustion) transmits power to the crankshaft. This “mechanical energy” is transferred to the axles and ultimately makes the wheels of the vehicle move.

http://xorl.wordpress.com/2011/03/05


Step 4 exhaust stroke

Step 4: Exhaust Stroke

  • 1. As the piston moves in an upward motion, the exhaust valve opens.

  • 2. This releases the smoke or exhaust from the combustion process.

  • 3. The 4 stroke cycle begins again.

http://xorl.wordpress.com/2011/03/05


Four stroke cycle

Four Stroke Cycle

ffden-2.phys.uaf.edu


Just imagine

Just Imagine………

  • Most car engines idle (run without the gas being depressed) between 600 rpm-1000 rpm

  • Trucks and buses idle around 540 rpm.

  • Rpm= Revolutions per minute... That’s how many times the crankshaft turns…. There are 2 revolutions per cycle.

  • If your car idles at 800 rpm….. That would mean the cycle repeats 400 times per minute or 6.67 cycles per second.

  • If your car is going around 65 mph at 3000 rpm…… That would mean the cycle repeats 1500 times per minute or 25 cycles per second.

  • That’s really fast…………


How does a gasoline engine work

Examples of Engines:4, 6 and 8 CylindersMost vehicles today have one of these three types of engines.The more cylinders it has, the more powerful the vehicle.


Cool youtube engine video

Cool YouTube Engine Video:

http://www.youtube.com/watch?v=60QX5RY_ohQ

http://www.origo.hu/i/0907/20090728ferrari455.jpg


References

References:

  • www.autolife.umd.umich.edu

  • www.Daimler.com

  • www.ehow.com

  • www.xorl.wordpress.com

  • www.youtube.com/watch?v=zA_19bHxEYg

  • www.wikianswers.com

  • www.Wikipedia.org

  • www.howstuffworks.com/engine


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