At the end of the 19th century As mechanical engineering developed, the question of replacing steam engines with motors of a new type became acute In Europe, experiments in this direction began in 1870 by engineer Rudolf Christian Karl Diesel Having abandoned the idea of using coal dust, the inventor decided to use heavy fractions of oil The first tests of the internal combustion engine were carried out in Augsburg in 1897 at a local engineering plant The experiment was completed successfully, and the whole world learned about the German engineer of French origin In honor of this event, the birthday of the diesel engine is celebrated on January 28 The engineer received a patent for his invention “Method and apparatus for converting high temperature into work” on January 28, 1893 However, it was the practical use of the engine that confirmed that it is a cost-effective, powerful and economically viable analogue of a gasoline engine Initially, to operate diesel engines they tried to use not only coal dust, which was abundant in Germany at that time, but also peanut oil However, it was difficult to feed small powder particles into the cylinders, unlike liquid fuel Vegetable oil has a low calorific value and low volatility, which means it requires higher consumption compared to diesel fuel Therefore, in 1897, the choice was made in favor of petroleum products The first diesel engine, named after the inventor, was a four-stroke, had 1 cylinder and a power of about 19 horsepower And fuel consumption per 1 hp was 258 grams of fraction per hour A modern single-cylinder engine consumes 2516 g Unlike a gasoline internal combustion engine, in a diesel engine the combustible mixture is ignited by pressure in the cylinder, rather than being set on fire Diesel oil is cheaper than traditional fuel In addition, the dense oil fraction causes less harm to the environment compared to gasoline engine exhaust On average, the efficiency of Rudolf Diesel's invention is 40% Its motor is not only economical, but also practical, durable and easy to maintain Over the past 120 years since their invention, diesel engines have taken pride of place in the automotive industry They are produced and installed in cars and trucks by the largest companies - industry leaders The first to do this was in 1936 by the Mercedes concern in the Mercedes Benz-260D car model Diesel engines are used in the production of heavy equipment, since 1903 they have been used in marine transport, and since 1908 in railway transport The German engineer took 17 years to achieve his goal, but still created a motor with excellent performance characteristics The engine immediately found application in many countries However, in his homeland, Diesel did not gain deserved recognition during his lifetime The inventor was very worried about this Paying tribute to his talent and perseverance, every year on January 28, car enthusiasts and equipment manufacturers celebrate the birthday of the diesel engine