So, the year 1864-th. German designer and inventor Nikolaus Otto, one of the first creators of an efficient internal combustion engine, gets acquainted with an entrepreneur from Cologne, Evgeny Longen, a very wealthy and technically competent man, and inspires him to create a company that would manufacture industrial combustion engines-atmospheric gas engines. Longen helps Otto to obtain a patent for the engine and conducts a "wide advertising campaign", demonstrating the motor at many exhibitions in the Old and New World. Finally, in 1867, the sample was awarded a gold medal at an exhibition in Paris, and interest in it reached the level at which it was worth starting its production. In 1869, launched a large plant near Cologne, in the suburbs of Doitz. The new enterprise is named after the names of its owners "Longen, Otto and Roosen". At the same time, the license for the production of the internal combustion gas engine of the English company Crossley is being sold. So, in the Old World a new compact energy source appeared on the market, ready to compete with bulky steam engines. In 1872 a new technical director - Gottlieb Daimler (the future inventor of the car) was appointed to the reconstructed enterprise, and Wilhelm Maybach - the person no less legendary in the automotive industry - became the head of the design department. The company receives the new name Gasmotoren-Fabrik Deutz AG and expands the scope of application of engines. In 1879 Nikolaus Otto successfully completes the experiment to create the world's first four-stroke engine with compression of the fuel-air mixture before its ignition - the prototype of most modern gasoline engines. Encouraged by the success, the enterprise is again being reconstructed and preparing for a new round of development, despite the departure of G. Daimler and V. Maybach from it. In 1886, Otto received his Ph.D. from the University of Wurzburg and, together with Robert Bosch, developed an electrical ignition system.