Why are carburetors not used in diesel engines

Heat engines

1Similar to an injection system, a carburetor is used to supply a gasoline engine with the correct fuel-air mixture in all load conditions. A flammable liquid is evaporated ('gasified') or injected into the intake duct or the combustion chamber itself (injection system) and mixed with a precisely adjusted amount of ambient air in order to obtain an optimally ignitable mixture.


Advantages of the diesel engine:
The most important argument for the diesel engine is the lower fuel consumption. Thanks to the introduction of direct injection, it was possible to significantly reduce consumption once again. Another argument in favor of the diesel engine is the high torque, especially in the lower speed range, which is most commonly used. It is no longer necessary to shift down to accelerate rapidly from low speeds.

Advantages of the gasoline engine:
The low power-to-weight ratio (kg / kW) and above all the larger usable speed range speak in favor of the petrol engine. More sporty driving (e.g. with motorcycles) is more likely to be possible with gasoline engines. As a rule, gasoline engines are cheaper than diesel engines, so that the advantage of lower fuel consumption with diesel engines only becomes effective for those who drive a lot.

Exhaust gas pollution

The exhaust gas pollution caused by the two types of engine is different: one could casually say: "The gasoline engine threatens the climate with the high CO2 Emission is particularly high, the diesel engine the lungs by emitting soot particles (fine dust) and nitrogen oxides. "However, current developments lead to shifts here. Modern gasoline direct injection engines are often also very economical, which reduces the CO2 Reduced disadvantage. At the same time, however, such models emit more soot particles (free dust) and more nitrogen oxides. Soot particle filters are now standard in modern diesel engines, but the high nitrogen oxide emissions are currently causing problems and discussions about driving bans.