cetane number

简明释义

十六烷值

英英释义

例句

1.The engine performance is highly dependent on the fuel's cetane number.

发动机性能在很大程度上依赖于燃料的十六烷值。

2.A higher cetane number generally leads to smoother engine operation.

更高的十六烷值通常会导致发动机运行更平稳。

3.Manufacturers often specify the required cetane number for optimal engine performance.

制造商通常会指定最佳发动机性能所需的十六烷值。

4.Diesel fuels with a low cetane number can cause hard starting in cold weather.

低十六烷值的柴油在寒冷天气中可能导致发动机难以启动。

5.Testing the cetane number of diesel fuel is crucial for quality assurance.

测试柴油燃料的十六烷值对于质量保证至关重要。

作文

The cetane number is a crucial parameter in the evaluation of diesel fuels. It is a measure of the ignition quality of diesel fuel, essentially indicating how quickly and efficiently the fuel will ignite when injected into an engine's combustion chamber. A higher cetane number signifies that the fuel ignites more readily and burns more completely, leading to improved engine performance and reduced emissions. This characteristic is particularly important for diesel engines, which rely on compression ignition rather than spark ignition like gasoline engines. In practical terms, a diesel fuel with a cetane number of 40 is considered the minimum acceptable value for most diesel engines, while premium fuels may have a cetane number of 50 or higher. The increase in cetane number can lead to several benefits, including smoother engine operation, reduced noise, and lower levels of unburned hydrocarbons in the exhaust. Furthermore, higher cetane numbers are associated with better cold-start performance, which is particularly advantageous in colder climates where diesel engines may struggle to start. To improve the cetane number, fuel manufacturers often blend high-cetane components into their diesel fuels. Common additives include cetane improvers, which can significantly enhance the ignition quality of the fuel. Additionally, the choice of feedstock used in the production of biodiesel can also influence its cetane number. For instance, fuels derived from certain vegetable oils tend to have higher cetane numbers compared to those made from animal fats or recycled cooking oils. The importance of the cetane number extends beyond just performance; it also has implications for environmental sustainability. Diesel engines with higher cetane numbers produce fewer harmful emissions, contributing to cleaner air and a healthier environment. As governments around the world implement stricter emissions regulations, the demand for high-quality diesel fuels with elevated cetane numbers is expected to rise. In conclusion, the cetane number is a vital factor in determining the quality and efficiency of diesel fuels. It plays a significant role in the performance of diesel engines, influencing everything from ignition timing to emissions output. As technology advances and the automotive industry evolves, understanding the implications of the cetane number will be essential for both consumers and manufacturers alike. By prioritizing fuels with higher cetane numbers, we can ensure better engine performance and contribute to a more sustainable future for our planet.

十六烷值是评估柴油燃料的重要参数。它是柴油燃料点火质量的一个指标，基本上表明燃料在喷入发动机燃烧室时点燃的速度和效率。更高的十六烷值意味着燃料更容易点燃，燃烧更完全，从而提高发动机性能并减少排放。这一特性对于依靠压缩点火而非火花点火的柴油发动机尤为重要。在实际应用中，十六烷值为40的柴油燃料被认为是大多数柴油发动机可接受的最低值，而优质燃料的十六烷值可能达到50或更高。提高十六烷值可以带来多种好处，包括发动机运行更平稳、噪音降低以及废气中未燃烃的水平降低。此外，更高的十六烷值与更好的冷启动性能相关，这在寒冷气候下尤其有利，因为柴油发动机在低温下可能难以启动。为了提高十六烷值，燃料制造商通常将高十六烷成分混合到他们的柴油燃料中。常见的添加剂包括十六烷改进剂，可以显著增强燃料的点火质量。此外，生产生物柴油所用的原料选择也会影响其十六烷值。例如，某些植物油衍生的燃料往往比动物脂肪或回收烹饪油制成的燃料具有更高的十六烷值。十六烷值的重要性不仅体现在性能上；它还对环境可持续性产生影响。具有更高十六烷值的柴油发动机产生的有害排放较少，有助于清洁空气和更健康的环境。随着世界各国实施更严格的排放法规，对高质量柴油燃料（具有更高十六烷值）的需求预计将会上升。总之，十六烷值是决定柴油燃料质量和效率的关键因素。它在柴油发动机的性能中发挥着重要作用，影响从点火时间到排放输出的方方面面。随着技术的进步和汽车行业的发展，理解十六烷值的影响将对消费者和制造商都至关重要。通过优先选择具有更高十六烷值的燃料，我们可以确保更好的发动机性能，并为我们星球的可持续未来做出贡献。