air fuel ratio

简明释义

空气燃料比

英英释义

例句

1.A rich air fuel ratio can lead to poor combustion and increased soot production.

富裕的空气燃料比可能导致燃烧不良和烟尘增加。

2.An ideal air fuel ratio ensures that the engine runs smoothly and efficiently.

理想的空气燃料比确保发动机平稳高效运行。

3.Adjusting the air fuel ratio can help reduce emissions in a vehicle.

调整空气燃料比可以帮助减少车辆的排放。

4.Engine tuners often monitor the air fuel ratio during performance testing.

发动机调校人员在性能测试期间通常会监测空气燃料比。

5.The optimal air fuel ratio is crucial for achieving maximum engine efficiency.

最佳空气燃料比对于实现发动机的最大效率至关重要。

作文

The concept of air fuel ratio is fundamental in the field of combustion and engine performance. It refers to the ratio of air to fuel that is mixed and burned in an engine or combustion system. Understanding the air fuel ratio is crucial for optimizing engine efficiency, reducing emissions, and improving overall performance. In internal combustion engines, achieving the right air fuel ratio is essential for maximizing power output while minimizing harmful exhaust gases.The air fuel ratio can be expressed in various ways, but it is commonly represented as a mass ratio. For instance, a typical stoichiometric air fuel ratio for gasoline engines is around 14.7:1. This means that for every unit of fuel, approximately 14.7 units of air are required for complete combustion. When the air fuel ratio is too rich (more fuel than air), it can lead to incomplete combustion, resulting in higher emissions of unburned hydrocarbons and carbon monoxide. Conversely, a lean mixture (more air than fuel) can cause engine knocking and overheating, ultimately damaging the engine.To illustrate the importance of the air fuel ratio, consider the impact of modern fuel injection systems. These systems are designed to precisely control the amount of fuel injected into the engine based on real-time measurements of the air fuel ratio. By optimizing this ratio, manufacturers can enhance fuel efficiency and reduce pollutants. For example, during acceleration, a richer mixture may be used to provide extra power, while a leaner mixture is often employed during cruising conditions to save fuel.Moreover, the air fuel ratio also plays a significant role in alternative fuel vehicles, such as those powered by compressed natural gas (CNG) or hydrogen. Each fuel type has its own optimal air fuel ratio, which must be carefully monitored and adjusted to ensure efficient combustion. In addition, advancements in technology, such as lambda sensors, allow for real-time adjustments to the air fuel ratio, ensuring that engines operate at their most efficient levels under varying conditions.In summary, the air fuel ratio is a critical parameter in the design and operation of combustion engines. It directly influences engine performance, fuel economy, and emissions. As automotive technology continues to evolve, understanding and optimizing the air fuel ratio will remain a key focus for engineers and researchers. The ongoing pursuit of cleaner and more efficient engines highlights the importance of this concept in shaping the future of transportation and environmental sustainability.

空气燃料比的概念在燃烧和发动机性能领域中至关重要。它是指在发动机或燃烧系统中混合和燃烧的空气与燃料的比例。理解空气燃料比对于优化发动机效率、减少排放和提高整体性能至关重要。在内燃机中，实现正确的空气燃料比对于最大化功率输出，同时最小化有害废气至关重要。空气燃料比可以用多种方式表示，但通常以质量比表示。例如，汽油发动机的典型化学计量空气燃料比约为14.7:1。这意味着每单位燃料大约需要14.7单位的空气才能完全燃烧。当空气燃料比过于丰富（燃料比空气多）时，会导致不完全燃烧，从而导致未燃烃和一氧化碳的排放增加。相反，稀混合物（空气比燃料多）可能会导致发动机敲击和过热，最终损坏发动机。为了说明空气燃料比的重要性，可以考虑现代燃油喷射系统的影响。这些系统旨在根据实时测量的空气燃料比精确控制喷入发动机的燃料量。通过优化这个比率，制造商可以提高燃油效率并减少污染物。例如，在加速过程中，可能会使用更丰富的混合物来提供额外的动力，而在巡航条件下通常会采用更稀的混合物以节省燃料。此外，空气燃料比在替代燃料车辆中也发挥着重要作用，例如那些由压缩天然气（CNG）或氢气驱动的车辆。每种燃料类型都有其自身的最佳空气燃料比，这必须仔细监测和调整以确保高效燃烧。此外，技术的进步，例如 Lambda 传感器，允许对空气燃料比进行实时调整，确保发动机在不同条件下以最高效率运行。总之，空气燃料比是设计和操作燃烧发动机的关键参数。它直接影响发动机性能、燃油经济性和排放。随着汽车技术的不断发展，理解和优化空气燃料比将仍然是工程师和研究人员关注的重点。对更清洁、更高效发动机的持续追求凸显了这一概念在塑造未来交通和环境可持续性方面的重要性。