Diesel Engines

By: Douglas Aycock

April 8, 2009

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HistoryHistory

• Named after Dr. Rudolf Diesel

• Originally replaced the stationary steam engine

– 75% efficient compared to10% by steam engine

• 1894 filed for a paten for his new invention

• By 1898 Diesel was a millionaire

– Used to power anything from electrical and water plants to marine craft

• About 50 % of new cars in Europe are Diesel (2007)

Diesel Engines, By: Douglas Aycock

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How the Diesel Engine WorksHow the Diesel Engine Works

Diesel Engines, By: Douglas Aycock

• Four Stroke

– Intake - air enters

– Compression – compresses and heats air

– Combustion – fuel combusts, and pushes piston down

– Exhaust – pushes exhaust out

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DifferencesDifferences

Diesel Engines

• Compression Ignition

• Higher compression ratio

– 14:1 - 25:1

• Can burn petroleum diesel, synthetic, and biodiesel

• Fuel ignites when mixed with air

Gas Engines

• Spark plug ignited

• Lower compression ratio

– Up to 14:1 (high performance)

• Can burn gasoline

• Fuel and air mixed then ignites

Diesel Engines, By: Douglas Aycock

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Advantages Over Gas EnginesAdvantages Over Gas Engines

• More torque and less RPM’s (revolutions per minute)

• Better fuel economy – 20% - 30% over gas

• Easier maintenance - no tune-ups

• Tougher engine components

• Last longer – average 350,000 miles (gas – 250,000)

• Higher energy density fuel– one gallon Diesel fuel = 147,000 BTU – One gallon Gasoline = 125,000 BTU

Diesel Engines, By: Douglas Aycock

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Applications Applications

Diesel Engines, By: Douglas Aycock

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ReferencesReferences

• http://images.google.com/imgres?imgurl=http://static.howstuffworks.com/gif/diesel-two-stroke.gif&imgrefurl=http://auto.howstuffworks.com/diesel-two-stroke1.htm&usg=__U-ArfF9KrIRBCIaeZDkhroCzPmk=&h=412&w=325&sz=26&hl=en&start=1&um=1&tbnid=jPMiIyCBKY-m3M:&tbnh=125&tbnw=99&prev=/images%3Fq%3DDiesel%2BEngines%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26channel%3Ds%26rls%3Dorg.mozilla:en-US:official%26sa%3DN%26um%3D1Sample slide bullet one

• http://images.google.com/imgres?imgurl=http://www.rkm.com.au/ANIMATIONS/animation-graphics/Diesel-model.jpg&imgrefurl=http://www.rkm.com.au/ANIMATIONS/animation-diesel-engine.html&usg=__EH4PSNVRM8w_jFT-0ukVAXn_vW8=&h=300&w=400&sz=24&hl=en&start=3&um=1&tbnid=m8gNjACUXInLWM:&tbnh=93&tbnw=124&prev=/images%3Fq%3DDiesel%2BEngines%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26channel%3Ds%26rls%3Dorg.mozilla:en-US:official%26sa%3DN%26um%3D1

• http://images.google.com/imgres?imgurl=http://static.howstuffworks.com/gif/diesel-two-stroke.gif&imgrefurl=http://auto.howstuffworks.com/diesel-two-stroke1.htm&usg=__U-ArfF9KrIRBCIaeZDkhroCzPmk=&h=412&w=325&sz=26&hl=en&start=1&um=1&tbnid=jPMiIyCBKY-m3M:&tbnh=125&tbnw=99&prev=/images%3Fq%3DDiesel%2BEngines%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26channel%3Ds%26rls%3Dorg.mozilla:en-US:official%26sa%3DN%26um%3D1

• http://en.wikipedia.org/wiki/Diesel_engine

Diesel Engines, By: Douglas Aycock