Differences between gasoline and diesel
The most characteristic feature of the diesel engine is that it uses compression ignition engine to burn fuel that is injected into the combustion chamber during the final stage of compression. In a diesel engine is fuel injected at full stretch in the warm, compressed air in the cylinder, causing it to burn a
nd no spark is required for this. Thus, Aucompression ignition "is done instead of" positive ignition ". Petrol engine is known as one airpark ignition, the AU engine.
Gasoline engine uses Otto cycle where a fuel / air mixture is ignited by a spark plug. Air and fuel mixture when ignited by a spark burn and thereby expands forcing the piston down. In case of a gasoline engine, fuel and air are mixed usually before compression. Earlier pre-mix used to happen in a carburetor, but now (except in the smallest engines), electronically controlled injection is used to this. The pre-mixture of fuel and air does a gasoline engine to run at much higher speed than a diesel. But it limits greatly their compression and thus its effectiveness.
Diesel engines give better fuel economy over gasoline due to the fact that they have higher compression ratios. Another advantage is that a diesel engine can easily turbocharged than a gasoline engine because of the fact that if the compression ratio and pressure in the cylinder is high in the inlet stroke, the mixture begins to burn at once, while the piston is going up. Diesel engine has no fuel in the cylinder, thus making it possible turbocharger to suck as much air as it can without creating problems.
The higher compression ratio is useful to increase fuel efficiency. Diesel engines are far more efficient than gasoline engines when at low power and at idle. Diesel engines, unlike gasoline engines, missing a butterfly valve (throttle) in the fjord system, which closes at idle. This creates parasitic loss and destruction of the availability of incoming air, reducing the efficiency of gasoline engines at idle. This mechanism makes diesel engines an attractive choice for many. Diesel engines are idle for many hours or sometimes days, in many applications such as marine, agriculture and railways. Motors are more efficient compared to gasoline engines with the same effect. They use significantly less fuel and offer better mileage.
A diesel engine can relatively take longer given the fact that petrol destroys lubrication and diesel will not work AOT. While all the above support diesel engines, a great advantage of gasoline engines is that they are relatively lighter than diesel engines. The engine weight is an important factor affecting the speed and performance of a car. It is one of the reasons why some of the fastest cars in the world runs on gasoline. It should be noted that while diesel engines are heavier and make the car heavy, they have more torque.
Engines and Emissions
Diesel engines use about 30% less fuel than gasoline engines, and this results in much less carbon dioxide. The diesel engines produce almost no carbon monoxide and is much safer than gasoline engines. Tests performed on emissions from cars reveals that while nitrogen oxides are higher in a new diesel engine compared to a new gasoline engine. But by the time they cover 50,000 miles or so, it is the same, and after the petrol engine produces more oxides than diesel engine. Hydrocarbons contained in gasoline engine emissions significantly more than the diesel engine emissions. But diesel is certainly more dangerous from the viewpoint particulate matter (SPM). SPM refers to solid particles suspended in the air, such as soot generated by combustion of various fuels. They can cause respiratory problems because of their tendency to deposit in the lungs. Although much has been done to improve fuel economy and reduce emissions from gasoline engine, yet more to be done.
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