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A diesel cycle engine can be as much as 40% to 50% efficient at converting fuel into work, [2] where a typical automotive gasoline engine's efficiency is about 25% to 30%. [3] [4] In general, an engine is designed to run on a single fuel source and substituting one fuel for another may affect the thermal efficiency.
The proposed design and final content for two options of the new sticker label that would be introduced in 2013 model year cars and trucks were consulted for 60 days with the public in 2010, and both include miles per gallon equivalent and kWh per 100 miles as the fuel economy metrics for plug-in cars, but in one option MPGe and annual ...
For example, hydrogen fuel cell vehicles that are in the early stages of development are more expensive and receive a larger tax credit than a diesel car that is cheaper to make. Existing incentive programs are also set to phase out after a given maker sells 60,000 hybrid vehicles, so more popular models like the Toyota Prius are no longer ...
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Example energy flows for a late-model (pre-2009) midsize passenger car: (a) urban driving; (b) highway driving. Source: U.S. Department of Energy [4] [5] Most of the fuel energy loss in cars occurs in the thermodynamic losses of the engine. Specifically, for driving at an average of 60 kilometres per hour (37 mph), approximately 33% of the ...
There are two different heat values for any hydrogen-containing fuel which can differ by several percent (see below). When comparing transportation energy costs, a kilowatt hour of electric energy may require an amount of fuel with heating value of 2 or 3 kilowatt hours to produce it.
They determined that the cost of a ton of oil fuel used in steam engines was $5.04 and yielded 20.37 train miles system wide on average. Diesel fuel cost $11.61 but produced 133.13 train miles per ton. In effect, diesels ran six times as far as steamers utilizing fuel that cost only twice as much.
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