Born Oct. 9, 1833, in Cologne; died there Oct. 2, 1895. German engineer; one of the inventors of the internal combustion engine.
Together with another German inventor, N. Otto, Langen developed a silent gas engine, which became known and accepted after the Paris Exposition of 1867. The efficiency attained by the engine was 14–15 percent, significantly exceeding that of other, similar engines.
REFERENCESRadtsig, A. A. Istoriia teplotekhniki. Moscow-Leningrad, 1936.
“Eugen Langen.” Engineering, 1933, vol. 136, no. 3533, pp. 359–60.