Original: Nikolaus August Otto ( 14 June 1832 , Holzhausen an der Haide , Nassau - 26 January 1891 , Cologne ) was the German inventor of the first internal-combustion engine to efficiently burn fuel directly in a piston chamber .
Simplified: Nikolaus August Otto ( June 14 , 1832 - January 28 , 1891 ) was a German engineer .