air-fuel ratio

简明释义

空气燃料比

英英释义

例句

1.An incorrect air-fuel ratio (空气燃料比) can cause engine knocking.

不正确的空气燃料比（air-fuel ratio）可能导致发动机敲击。

2.Monitoring the air-fuel ratio (空气燃料比) is crucial for reducing emissions.

监测空气燃料比（air-fuel ratio）对减少排放至关重要。

3.The engine's performance can be improved by optimizing the air-fuel ratio (空气燃料比).

通过优化空气燃料比（air-fuel ratio），可以提高发动机的性能。

4.Adjusting the air-fuel ratio (空气燃料比) can help in tuning the vehicle for better performance.

调整空气燃料比（air-fuel ratio）可以帮助调校车辆以获得更好的性能。

5.A lean air-fuel ratio (空气燃料比) can lead to higher fuel efficiency.

偏瘦的空气燃料比（air-fuel ratio）可以提高燃油效率。

作文

The concept of air-fuel ratio is fundamental in understanding how internal combustion engines operate efficiently. The air-fuel ratio refers to the proportion of air to fuel that is mixed and burned in an engine. This ratio plays a critical role in determining the performance, efficiency, and emissions of the engine. When the air-fuel ratio is balanced correctly, the engine can achieve optimal combustion, which maximizes power output while minimizing waste and harmful emissions.In an ideal scenario, the air-fuel ratio is maintained at a stoichiometric level, which is approximately 14.7 parts of air to 1 part of fuel for gasoline engines. This ratio ensures that all the fuel is burned completely and efficiently. However, various factors such as engine load, temperature, and altitude can affect this ratio. For instance, at higher altitudes, the air density decreases, which means there is less oxygen available for combustion. Consequently, the air-fuel ratio must be adjusted to ensure the engine continues to perform well under these conditions.When the air-fuel ratio is too rich, meaning there is too much fuel relative to air, it can lead to incomplete combustion. This results in a loss of power, increased fuel consumption, and higher emissions of unburned hydrocarbons. On the other hand, if the air-fuel ratio is too lean, meaning there is too much air relative to fuel, it can cause the engine to run hotter and may lead to knocking or pre-ignition, which can damage engine components over time.Modern vehicles are equipped with sophisticated engine management systems that continuously monitor and adjust the air-fuel ratio based on real-time data from various sensors. These systems help maintain the optimal balance, ensuring that the engine operates efficiently across different driving conditions. Additionally, advancements in technology have led to the development of alternative fuels and hybrid systems, which also require careful management of the air-fuel ratio to optimize performance and reduce environmental impact.Understanding the air-fuel ratio is crucial not only for automotive engineers but also for car owners who wish to maintain their vehicles in peak condition. Regular maintenance, including checking and replacing air filters and fuel injectors, can help keep the air-fuel ratio within the desired range. Moreover, being aware of how driving habits affect fuel consumption and emissions can empower drivers to make more informed choices, contributing to a cleaner environment.In conclusion, the air-fuel ratio is a key parameter in the operation of internal combustion engines. It influences performance, fuel efficiency, and emissions. A proper understanding and management of the air-fuel ratio can lead to better engine performance and a reduced environmental footprint. As technology continues to evolve, the importance of maintaining an optimal air-fuel ratio will only grow, making it essential knowledge for anyone involved in the automotive industry or simply interested in vehicle maintenance.

空气-燃料比的概念在理解内燃机如何高效运作方面至关重要。空气-燃料比是指在发动机中混合并燃烧的空气与燃料的比例。这个比率在决定发动机的性能、效率和排放方面起着关键作用。当空气-燃料比正确平衡时，发动机可以实现最佳燃烧，从而最大化功率输出，同时最小化废物和有害排放。在理想情况下，空气-燃料比保持在化学计量水平，对于汽油发动机而言，大约是14.7份空气对1份燃料。这个比例确保所有燃料都被完全有效地燃烧。然而，诸如发动机负荷、温度和海拔等各种因素会影响这个比例。例如，在较高的海拔，空气密度降低，这意味着可用于燃烧的氧气减少。因此，必须调整空气-燃料比以确保发动机在这些条件下继续良好运行。当空气-燃料比过于丰富，即相对于空气来说燃料过多时，会导致不完全燃烧。这会导致动力损失、燃油消耗增加以及未燃烃的排放增加。另一方面，如果空气-燃料比过于稀薄，即相对于燃料来说空气过多，可能会导致发动机运行过热，并可能导致敲缸或预点火，这可能会随着时间的推移损坏发动机部件。现代车辆配备了复杂的发动机管理系统，这些系统持续监测并根据各种传感器的实时数据调整空气-燃料比。这些系统帮助维持最佳平衡，确保发动机在不同驾驶条件下高效运行。此外，技术的进步导致了替代燃料和混合动力系统的发展，这些系统也需要仔细管理空气-燃料比以优化性能并减少环境影响。理解空气-燃料比对汽车工程师来说至关重要，对于希望保持其车辆处于最佳状态的车主来说也是如此。定期维护，包括检查和更换空气滤清器和燃油喷射器，可以帮助将空气-燃料比保持在所需范围内。此外，了解驾驶习惯如何影响燃油消耗和排放可以使驾驶者做出更明智的选择，从而有助于创造一个更清洁的环境。总之，空气-燃料比是内燃机运作中的关键参数。它影响性能、燃油效率和排放。适当理解和管理空气-燃料比可以带来更好的发动机性能和减少环境足迹。随着技术的不断发展，保持最佳空气-燃料比的重要性只会增加，使其成为任何涉及汽车行业或仅对车辆维护感兴趣的人的基本知识。