In the world of Manufacturing, Bosch is considered the epitome of engineering, with its many pioneering inventions and innovations. Robert Bosch invented a magneto for stationary engines in 1887, which was used to generate a spark to ignite the air-fuel mixture in the engine. In 1897 he adapted his magneto device and invented the first spark plug, a magneto-based ignition system; an invention which revolutionized the operation of automobiles due to its reliability.
Source: www.famousscientists.org