auto ignition

简明释义

自燃

英英释义

例句

1.In diesel engines, auto ignition occurs due to high compression temperatures.

在柴油发动机中，自燃是由于高压缩温度引起的。

2.Understanding auto ignition is crucial for designing safer engines.

理解自燃对设计更安全的发动机至关重要。

3.Some fuels have a higher tendency for auto ignition than others.

某些燃料比其他燃料更容易发生自燃。

4.The mechanic explained how auto ignition can lead to engine knocking.

机械师解释了如何导致发动机敲击的自燃。

5.The engine relies on auto ignition for efficient fuel combustion.

发动机依赖于自燃来实现高效的燃料燃烧。

作文

The concept of auto ignition refers to the process where a fuel-air mixture ignites spontaneously without the need for an external ignition source, such as a spark plug. This phenomenon is particularly significant in the field of internal combustion engines and plays a crucial role in various applications, including automotive technology and industrial machinery. Understanding auto ignition is essential for engineers and scientists who aim to improve engine efficiency and reduce emissions.In a typical internal combustion engine, fuel is mixed with air and compressed within the cylinder. When the pressure and temperature reach a certain threshold, the mixture can ignite on its own due to the heat generated by compression. This self-ignition is known as auto ignition, and it occurs at a specific temperature called the auto-ignition temperature. This temperature varies depending on the type of fuel used. For instance, diesel fuel has a higher auto ignition temperature compared to gasoline, which is why diesel engines operate differently than gasoline engines.One of the primary advantages of auto ignition is that it can lead to more efficient combustion. In diesel engines, the fuel is injected into the compressed air, which is already at a high temperature due to compression. This allows for a more complete burn of the fuel, resulting in better fuel efficiency and lower carbon emissions. Conversely, gasoline engines rely on a spark plug to ignite the fuel-air mixture, which can lead to incomplete combustion and higher emissions.However, auto ignition also presents challenges. If the fuel-air mixture ignites too early, before the piston reaches its optimal position, it can cause knocking or pinging, which can damage the engine over time. This phenomenon is known as pre-ignition, and it is a significant concern for engine designers. To mitigate this issue, engineers often use additives in fuels to raise the auto ignition temperature or design engines that can withstand higher pressures and temperatures.Moreover, the study of auto ignition extends beyond just automotive applications. It is also relevant in industries such as aerospace and manufacturing, where understanding the ignition characteristics of various fuels can enhance safety and performance. For example, in rocket propulsion, the ability to control auto ignition is crucial for optimizing thrust and ensuring reliable launches.In conclusion, auto ignition is a fundamental concept in combustion science that has profound implications for engine design and efficiency. By harnessing the principles of auto ignition, engineers can create more effective and environmentally friendly engines. As technology continues to evolve, the understanding of auto ignition will undoubtedly play a pivotal role in shaping the future of transportation and energy production. Therefore, it is imperative for professionals in the field to stay informed about advancements related to this phenomenon and its applications across various industries.

“自动点火”这一概念是指燃料-空气混合物在没有外部点火源（如火花塞）的情况下，自发点燃的过程。这一现象在内燃机领域尤为重要，并在汽车技术和工业机械等多个应用中发挥着关键作用。理解“自动点火”对于旨在提高发动机效率和减少排放的工程师和科学家至关重要。在典型的内燃机中，燃料与空气混合并在气缸内被压缩。当压力和温度达到一定阈值时，混合物能够由于压缩产生的热量而自发点燃。这种自我点燃的现象称为“自动点火”，它在特定温度下发生，这个温度被称为自动点火温度。该温度因所用燃料类型而异。例如，柴油燃料的“自动点火”温度高于汽油，这就是为什么柴油发动机的工作方式与汽油发动机不同。“自动点火”的主要优点之一是可以导致更高效的燃烧。在柴油发动机中，燃料在已经因压缩而达到高温的压缩空气中喷入。这允许燃料更完全地燃烧，从而提高燃油效率并降低碳排放。相反，汽油发动机依赖火花塞来点燃燃料-空气混合物，这可能导致不完全燃烧和更高的排放。然而，“自动点火”也带来了挑战。如果燃料-空气混合物过早点燃，即在活塞达到最佳位置之前，就会导致敲击或嗡嗡声，随着时间的推移可能会损坏发动机。这种现象被称为预点火，是发动机设计者面临的一大关注点。为了减轻这一问题，工程师通常在燃料中使用添加剂以提高“自动点火”温度，或设计能够承受更高压力和温度的发动机。此外，“自动点火”的研究不仅限于汽车应用。在航空航天和制造等行业，了解各种燃料的点火特性可以增强安全性和性能。例如，在火箭推进中，控制“自动点火”的能力对优化推力和确保可靠发射至关重要。总之，“自动点火”是燃烧科学中的基本概念，对发动机设计和效率有深远影响。通过利用“自动点火”的原理，工程师可以创造出更有效和环保的发动机。随着技术的不断发展，对“自动点火”的理解无疑将在塑造未来交通和能源生产中发挥关键作用。因此，相关领域的专业人士必须及时了解与这一现象及其在各行业应用相关的进展。