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Français- What is diesel engine?
Diesel engines are internal-combustion engines that use compressed air to ignite diesel fuel injected into the combustion chamber. Combustion and expansion actuate a piston to generate mechanical energy, used for powering freight trucks, large tractors, locomotives and marine vessels.
The internal combustion cycle of a diesel engine consists of induction, compression, combustion and exhaust strokes. The compression stroke involves moving the piston from bottom dead center (BDC) to top dead center (TDC).
Combustion of diesel fuel is a highly efficient process. This is because the high compression ratio allows for combustion without pre-ignition problems that plague spark-ignition engines.
Compression creates heat that atomizes diesel fuel and self-ignites it, without using spark plugs.
- Advantages and disadvantages of diesel engines
Diesel engines are a great choice for anyone looking for performance. They can power trucks and heavy equipment, as well as many other types of vehicles.
The most obvious advantage is that they produce better fuel economy than gas engines. They typically deliver 25 to 30 percent better mileage than similar-performing gasoline engines.
They also provide more torque than most gasoline-powered engines, which allows them to pull loads and accelerate faster. This is why diesels are used in large trucks and semis.
Another advantage is that they require less maintenance than gasoline-powered cars and SUVs. They don't need spark plugs or distributor caps like a gas engine, so they won't need to be inspected or repaired as often.
But despite their advantages, diesel engines still have a few disadvantages. For example, they can develop black ooze in the exhaust when operating under cold conditions or with too much or too little fuel.
- Applications of diesel engines
Diesel engines come in a variety of types. They are used in heavy-duty vehicles, ships and locomotives as well as for portable power generators.
They are also used in the mining and mineral extraction industries. Diesel-powered shovels and drills excavate materials such as iron ore, oil, gas and coal.
In the agricultural industry, tractors, pumps and threshing machines are powered by diesel. Construction vehicles such as pavers, rollers, scrapers and trenchers are also heavily dependent on diesel power.
