Question

With the aid of a graph, explain the term Diesel Dilemma, stating why it is not possible to have high efficiency and low emissions.

Answer 1

Diesel engines have high efficiency, durability, and reliability together with their low-operating cost. These important features make them the most preferred engines especially for heavy-duty vehicles. The interest in diesel engines has risen substantially day by day. In addition to the widespread use of these engines with many advantages, they play an important role in environmental pollution problems worldwide. Diesel engines are considered as one of the largest contributors to environmental pollution caused by exhaust emissions, and they are responsible for several health problems as well.They are the power source of commercial transport, being employed in trucks, buses, trains, and ships as well as off-road industrial vehicles such as excavation machinery and mining equipment. Although they have many advantages, they have a significant impact upon environmental pollution problems worldwide.However, many reasons (the air–fuel ratio, ignition timing, turbulence in the combustion chamber, combustion form, air–fuel concentration, combustion temperature, etc.) make this out of question, and a number of harmful products are generated during combustion.Many emission control systems have been kept by researchers but they have been failed significantly.The graph shows the diesel vehicles are increasing from year to year this means the diesel consumption is increasing day by day.

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