Materials Science and Nanotechnology

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Materials Science and Nanotechnology 44 7897 074717

Engine-Efficiency

Basically the engine efficiency is defined as ratio of the useful work done to the heat provided. It means the friction and other losses are subtracted from the work done by thermodynamic expansion. Therefore an engine not delivering any work to the outside environment has zero efficiency. Diesel engine is so compressed; the engine gets greater efficiency from the fuel. Specifically diesel engine is generally 20 per cent more efficient than an equivalent petrol engine. Diesel produces more CO2 emissions per liter of fuel burnt; about 17 per cent more than petrol. As the gasoline engines often blow more than 80% of the energy produced out the tailpipe or lose that energy to the environment around the engine.

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