Carburetor
The first carburetor was invented by Samuel Morey in 1826. The first person to patent a carburetor for use in a petroleum engine was Siegfried Marcus with his 6 July 1872 patent for a device which mixes fuel with air.
De Rivaz engine
Towards the end of the 18th century Isaac de Rivaz, a Franco-Swiss artillery officer and inventor, designed several successful steam powered carriages, or charettes as he called them in the French language. His army experience with cannon had led him to think about using an explosive charge to drive a piston instead of steam. In 1804 he began to experiment with explosions created inside a cylinder with a piston. His first designs were for a stationary engine to power a pump. The engine was powered by a mixture of hydrogen and oxygen gases ignited to create an explosion within the cylinder and drive the piston out. The gas mixture was ignited by an electric spark in the same manner as a modern internal combustion engine. In 1806 he moved on to apply the design to what became the world's first internal combustion engine driven automobile.