octane number

简明释义

辛烷值

英英释义

例句

1.The higher the octane number, the more resistant the fuel is to knocking.

燃料的辛烷值越高，对爆震的抵抗力越强。

2.The octane number is a measure of a fuel's ability to resist knocking during combustion.

辛烷值是衡量燃料在燃烧过程中抵抗爆震能力的指标。

3.Most premium gasoline has an octane number of 91 or higher.

大多数高档汽油的辛烷值为91或更高。

4.Racing cars often require fuel with a very high octane number for optimal performance.

赛车通常需要具有非常高的辛烷值的燃料以获得最佳性能。

5.Using fuel with a lower octane number than recommended can damage the engine.

使用低于推荐的辛烷值的燃料可能会损坏发动机。

作文

The importance of fuel quality in modern automobiles cannot be overstated. One of the key indicators of fuel quality is its octane number, which measures a fuel's ability to resist knocking during combustion. Knocking occurs when fuel burns unevenly in an engine's cylinder, leading to decreased performance and potential damage. Therefore, understanding the concept of octane number is essential for both manufacturers and consumers alike.The octane number is a standard measurement used to compare the performance of different fuels. Higher octane numbers indicate a greater resistance to knocking, allowing for more efficient combustion. This is particularly important in high-performance engines, which operate under higher pressures and temperatures. Using fuel with an inadequate octane number can result in engine knock, which not only reduces efficiency but can also lead to severe engine damage over time.In general, gasoline sold at the pump has an octane number ranging from 87 to 93 in the United States. Regular unleaded gasoline typically has an octane number of 87, while premium fuels may have an octane number of 91 or 93. Consumers often choose premium fuels believing they will enhance performance, but it's essential to consult the vehicle's owner manual to determine the required octane number. Using a fuel with a higher octane number than necessary does not provide additional benefits for most vehicles and can lead to unnecessary expenses.The science behind octane number is quite fascinating. It is determined through tests that involve comparing the fuel's performance to that of two reference fuels: iso-octane and heptane. Iso-octane, which has an octane number of 100, represents high resistance to knocking, while heptane, with an octane number of 0, indicates low resistance. The resulting octane number of a fuel is calculated based on the percentage of iso-octane and heptane mixed to match the fuel's performance.Moreover, advancements in technology have led to the development of various additives that can improve the octane number of fuels. These additives are designed to enhance the combustion process, reduce emissions, and improve overall engine performance. For instance, ethanol is often blended with gasoline to increase its octane number and reduce harmful emissions. However, the use of ethanol must be carefully balanced, as excessive amounts can lead to issues such as water absorption and corrosion in the fuel system.In conclusion, the octane number is a critical factor in determining the quality and performance of gasoline. Understanding this concept helps consumers make informed decisions about fuel choices, ensuring their vehicles operate efficiently and safely. As automotive technology continues to evolve, the significance of the octane number will remain paramount in optimizing engine performance and reducing environmental impact. By prioritizing fuel quality and being aware of the octane number, we can contribute to a more sustainable future for our planet while enjoying the benefits of modern transportation.

现代汽车中燃油质量的重要性不容小觑。燃油质量的关键指标之一是其辛烷值，它衡量燃料在燃烧过程中抵抗爆震的能力。爆震发生在发动机气缸内燃料燃烧不均匀时，这会导致性能下降和潜在损坏。因此，理解辛烷值的概念对制造商和消费者都至关重要。辛烷值是一种用于比较不同燃料性能的标准测量。更高的辛烷值表示对爆震的更大抵抗力，从而实现更高效的燃烧。这在高性能发动机中尤为重要，因为它们在更高的压力和温度下运行。使用不足的辛烷值的燃料可能导致发动机爆震，这不仅降低效率，还可能导致发动机随着时间的推移受到严重损坏。一般来说，在美国，加油站出售的汽油的辛烷值范围从87到93不等。普通无铅汽油通常具有87的辛烷值，而高级燃料的辛烷值可能达到91或93。消费者通常选择高级燃料，认为这会提升性能，但咨询车辆用户手册以确定所需的辛烷值是至关重要的。对于大多数车辆而言，使用高于必要的辛烷值的燃料不会提供额外的好处，反而可能导致不必要的开支。关于辛烷值的科学原理相当迷人。它是通过将燃料的性能与两种参考燃料进行比较来确定的：异辛烷和庚烷。异辛烷的辛烷值为100，代表对爆震的高抵抗力，而庚烷的辛烷值为0，表示低抵抗力。燃料的最终辛烷值是根据混合的异辛烷和庚烷的百分比计算得出的，以匹配燃料的性能。此外，技术的进步导致了各种添加剂的开发，这些添加剂可以提高燃料的辛烷值。这些添加剂旨在增强燃烧过程，减少排放，并改善整体发动机性能。例如，乙醇通常与汽油混合以提高其辛烷值并减少有害排放。然而，乙醇的使用必须谨慎平衡，因为过量可能导致水分吸收和燃油系统腐蚀等问题。总之，辛烷值是决定汽油质量和性能的关键因素。理解这一概念有助于消费者在燃料选择上做出明智的决策，确保他们的车辆高效安全地运行。随着汽车技术的不断发展，辛烷值的重要性将在优化发动机性能和减少环境影响方面继续保持重要。通过优先考虑燃料质量并意识到辛烷值，我们可以为地球的可持续未来做出贡献，同时享受现代交通的好处。