The cars based on diesel engined compared to petrol engines are more powerful, it is not surprising that the current market appetite switch to diesel cars with all the advantages that exist in the diesel-engined cars.

The main reason is the increasing price of fuel that inevitably force consumers to use a car with a fuel that is cheaper or even leave the conventional cars and switch to hybrid cars. Diesel cars with diesel fuel are more efficient than gasoline cars. But how about the pollution between diesel and gasoline cars, is it higher in diesel? Lets have a look below and break the myth about diesel engine based cars.
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Eco-driving or economic driving, its time to pay more attention on environment we live. We all know that fossil resources for making fuels will run out eventually, other than that pollution that being contributed mostly from our vehicles are very concerning. Not to mention that the numbers of vehicle kept on increasing each years.

Although we do know that fuels could be produced from chemical mix or bio-fuels, and its reducing the amount of pollution, but at the end it would be more better if we do eco-driving as well.
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Fuel cell vehicles have the potential to significantly reduce greenhouse gas emissions (depending on how hydrogen is produced) as well as U.S. dependence on imported oil over the long term. However, fuel cell vehicle technologies have technical challenges that are severe enough to convince the committee that it is unlikely such vehicles will be deployed in significant numbers within the time horizon of this study.

A recent report states that under the following set of very optimistic assumptions, 2 million fuel cell vehicles could be part of the U.S. fleet in 2020:
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Light-duty compression-ignition (CI) engines operating on diesel fuels have the highest thermodynamic cycle efficiency of all light-duty engine types. The CI diesel thermodynamic cycle efficiency advantage over the more common SI gasoline engine stems from three major factors: the CI’s use of lean mixtures, its lack of throttling of the intake charge, and its higher compression ratios. In a CI diesel engine-equipped vehicle, there is an additional benefit of reduced volumetric fuel consumption (e.g., gal/100 miles) because diesel fuel provides more energy per gallon than gasoline.

Lean mixtures, whose expansions are thermodynamically more efficient because of their higher ratio of specific heats, are enabled by the CI diesel combustion process. In this process, diesel fuel, which has chemical and physical properties such that it self-ignites readily, is injected into the cylinder late in the compression stroke. Ignition occurs following atomization of the fuel jet into small droplets that vaporize and mix, creating pockets of heterogeneous combustible mixtures.
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As a general rule, reduced fuel consumption comes at a cost. The cost may be due to more expensive materials, increased manufacturing complexity, or a tradeoff with other vehicle attributes such as power or size. In addition to increased manufacturing costs, other costs of doing business are likely to be affected to a greater or lesser degree.

These indirect costs include research and development (R&D), pensions and health care, warranties, advertising, maintaining a dealer network, and profits. The most appropriate measure of cost for the purpose of evaluating the costs and benefits of fuel economy regulations is the long-run increase in retail price paid by consumers under competitive market conditions. The retail price equivalent (RPE) cost of decreasing fuel consumption includes not only changes in manufacturing costs but also any induced changes in indirect costs and profit.
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