Browse Topic: Fuel certification
A vital element of any vehicle-certification test is the use of representative values for the vehicle resistance forces. In most certification procedures, including the WLTP recently adopted by the EU, the latter is achieved mainly through coast down tests. Subsequently, the resistance values measured are used for setting up the chassis-dyno resistances applied during the laboratory measurements. These reference values are obtained under controlled conditions, while a series of corrections are applied to make the test procedure more repeatable and reproducible. In real driving, the actual vehicle road loads are influenced by a series of factors leading to a divergence between the certified fuel consumption values, and the real-world ones. An approach of calculating representative road loads during on-road tests can help to obtain a more unobstructed view of vehicle efficiency and, when needed, confirm the officially declared road loads. This approach is also essential for validating
The key to a vibrant aviation biofuels market is a reliable and plentiful supply of nonpetroleum feedstocks. There's a long way to go, but things are coming together for the aviation industry in its push to increase the amount of biofuel it uses. The U.S. agriculture industry is giving the aviation industry an assist in meeting the latter's self-imposed target of carbon-emissions neutrality by 2020. According to Richard Altman, Executive Director of the Commercial Aviation Alternative Fuels Initiative (CAAFI), the goal is to have 10 plants up and running, or close to it, by 2013. There are no production facilities producing aviation biofuel now, though some facilities are producing it in limited amounts for demonstration projects being carried out by airlines and other parties.
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