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How Does a Gasoline Engine Work?

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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  1. How Does a Gasoline Engine Work? by Ryan Cramer… 6th grade

  2. 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

  3. 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

  4. 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/

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. Four Stroke Cycle ffden-2.phys.uaf.edu

  13. 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…………

  14. 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.

  15. Cool YouTube Engine Video: http://www.youtube.com/watch?v=60QX5RY_ohQ http://www.origo.hu/i/0907/20090728ferrari455.jpg

  16. 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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