diiselmootoris

Diiselmootoris is the Estonian term for a diesel engine. A diesel engine is a type of internal combustion engine that uses the heat of compression to ignite fuel. Unlike gasoline engines, which use spark plugs, diesel engines rely on the high temperature generated by compressing air in the cylinder to ignite the diesel fuel when it is injected. This process is known as compression ignition.

Rudolf Diesel patented the diesel engine in 1893. His original design aimed to burn various fuels, including coal dust. The first successful diesel engines were developed in the late 19th century. Diesel engines are known for their high thermal efficiency, meaning they convert a larger proportion of the fuel's energy into useful work compared to gasoline engines. This efficiency contributes to their reputation for better fuel economy.

The operation of a four-stroke diesel engine involves four distinct piston movements: intake, compression, power, and exhaust. During the intake stroke, air is drawn into the cylinder. In the compression stroke, the air is compressed to a high temperature and pressure. The power stroke occurs when diesel fuel is injected into the hot, compressed air, causing it to ignite and expand, pushing the piston down. Finally, during the exhaust stroke, the burnt gases are expelled from the cylinder.

Diesel engines are widely used in heavy-duty applications such as trucks, buses, trains, ships, and agricultural machinery due to their torque output and durability. They are also found in some passenger cars, particularly in Europe, where their fuel efficiency and lower CO2 emissions are advantageous. However, diesel engines can produce higher levels of nitrogen oxides (NOx) and particulate matter, leading to stricter emissions regulations and the development of advanced exhaust after-treatment systems.