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Dutch physicist , Chritsian Huygens designed (didnt bulid) an internal combustion engine. Fuled by gunpowder
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http://webcache.googleusercontent.com/search?q=cache:fRbxox9L_0AJ:inventors.about.com/library/weekly/aacarsgasa.htm+&cd=9&hl=en&ct=clnk&gl=us Francias Isaac de Riverz invented the internal combustion engine with a mixture that used hydrogen and oxygen as fuel.
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Engineer Lenoir invented and patented invented a double acting, spark-ignition internal combustion engine. Fuled by coal gas
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http://webcache.googleusercontent.com/search?q=cache:fRbxox9L_0AJ:inventors.about.com/library/weekly/aacarsgasa.htm+&cd=9&hl=en&ct=clnk&gl=us Alphonse Beau de Rochas patented the four stroke engine (did not build).
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Lenoir attached an improved engine to a three wheeledwagon and the wagon made a 50 mile road trip.
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http://webcache.googleusercontent.com/search?q=cache:fRbxox9L_0AJ:inventors.about.com/library/weekly/aacarsgasa.htm+evolution+of+the+engine&cd=3&hl=en&ct=clnk&gl=usenigeer seigfried marcus bulit a one cylinder engine with a crude carburetor and attached it to his engine
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http://webcache.googleusercontent.com/search?q=cache:fRbxox9L_0AJ:inventors.about.com/library/weekly/aacarsgasa.htm+&cd=9&hl=en&ct=clnk&gl=usGeorge Bayton invented an two-stroke korosene engine but was unsuccessful. It is still consider the frirst safe practical oil engine.
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Nikolous August Otto invented and later patened a four stroke engine (otto-cycle)
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http://webcache.googleusercontent.com/search?q=cache:fRbxox9L_0AJ:inventors.about.com/library/weekly/aacarsgasa.htm+&cd=9&hl=en&ct=clnk&gl=usSir Dougald Clerk invented the first susccessful two-stroke engine.
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http://webcache.googleusercontent.com/search?q=cache:fRbxox9L_0AJ:inventors.about.com/library/weekly/aacarsgasa.htm+evolution+of+the+engine&cd=3&hl=en&ct=clnk&gl=us Karl Benz got the first patent for a gas fuled car
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http://webcache.googleusercontent.com/search?q=cache:fRbxox9L_0AJ:inventors.about.com/library/weekly/aacarsgasa.htm+evolution+of+the+engine&cd=3&hl=en&ct=clnk&gl=us Daimler bulit an improved four stroke engine. it had mushroom shaped valves and two v-slant cyclinders
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http://webcache.googleusercontent.com/search?q=cache:fRbxox9L_0AJ:inventors.about.com/library/weekly/aacarsgasa.htm+&cd=9&hl=en&ct=clnk&gl=us Wilhelm Maybach created the first four-cylinder four-stroke engine.