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Dutch physicist, Christian Huygens designed (but never built) the combustion engine.
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Nicolas Joseph Cugnot of France built the first automobile.
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Francois Isaac De Rivaz of Switzerland invented the internal combustion engine.
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English engineer, Samuel Brown adapted an old steam engine to burn gas to briefly power a vehicle.
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Belgian born engineer, Jean Joseph Etienne Lenoir invented a spark- ignition internal combustion engine fueled by coal gas, which was patented in 1860.
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Alphonse Beau de Rochas, a French civil engineer, patented but did not build a four stroke engine
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Australian engineer, Siegfried Marcus built a one-cylinder engine with a crude carburetor which is the worlds first gasoline-powered vehicle.
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German engineers, Eugen Langen and Nikolaus August Otto improved Lenoir's and de Rochas' designs and invented a more efficient gas engine.
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George Brayton, an American engineer, developed an unsuccessful two-stroke kerosene engine, but it was considered the first safe and practical oil engine.
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Nikolaus August Otto invented and later patented the four stroke engine, it was known as the ''Otto cycle''.
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The very first successful two-stroke was invented by Sir Dougald Clerk.
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French engineer, Edouard Delamare-Debouteville, built a single cylinder four-stroke that ran on stove gas, but it is not certain that he built a car.
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Gottlieb Daimler invented what is often known as the prototype of the modern gas engine and built a two wheeled car and later built the world's first four-wheeled motor vehicle.
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Karl Benz recieved the first patent for a gas-fueled car.
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Gattlieb Daimler built an improved four-stroke engine with mushroom shaped valves and two V-slant cylinders
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Wilhelm Maybach built the first four-cylinder four-stoke engine.