A diesel engine is an internal combustion engine that uses light petroleum fuel. This is a gasoline-type piston engine, but only air (not the fuel-air mixture) enters the cylinder during the first stroke of the piston. The piston rises and compresses the air to a very high temperature. At this moment, the pump injects fuel, and due to the high temperature of the air, it ignites. While the fuel is burning, the piston goes down (working stroke). The engine is economical, named after its inventor, Rudolph Diesel. The operation cycle of an internal combustion engine consists of the following processes: compression, combustion, expansion, release of exhaust gases. In theoretical cycles, it is assumed that the fuel mixture is injected instantaneously, which corresponds to the compression start point. The cycles of carburetor and diesel engines differ in the nature of the process of heat supply (combustion). It should be noted that in practice the cycle of real internal combustion engines corresponds to a combined or generalized cycle, in which the first part of heat is supplied at V=const., and the second at P=const. Diesel engines have a longer service life before overhaul — 200,000 to 800,000. km The sound of the pump, which under pressure injects fuel into the cylinders, is characteristic. In 2018, a number of countries (primarily Germany — Hamburg and Aachen) began banning diesel cars from entering cities. Diesel cars are sometimes mistakenly considered to be more environmentally friendly than gasoline cars, although this is not the case. With the development of electric vehicles, more and more manufacturers are reducing the production of diesel cars, and some are abandoning them altogether. In 2018, Toyota, followed by Nissan, announced the gradual but complete cessation of sales of diesel cars in Europe. The new Kia Seltos will also be equipped with a 1.5-liter diesel engine. [2] Among other things, this is due to the drop in demand for diesel cars: in 2011, the demand level was 54.9%, and in 2017, it was 43.8%. Otto four-stroke engine. How it works, or a completely true story: • Otto's four-stroke engine. How it works... Official pages: https://www.facebook.com/profile.php?.... / romaniv_2809​​ / mechanics_ukr​​ Many interesting videos: https://www.mozaweb.com/uk /index.php