bore-stroke ratio

简明释义

缸径行程比

英英释义

例句

1.A typical motorcycle engine has a bore-stroke ratio that favors high RPMs for better acceleration.

典型的摩托车发动机具有偏向高转速的缸径行程比，以获得更好的加速性能。

2.The bore-stroke ratio can affect the engine's torque characteristics, making it crucial for heavy-duty vehicles.

缸径行程比会影响发动机的扭矩特性，因此对于重型车辆至关重要。

3.When designing an engine, engineers must consider the bore-stroke ratio to optimize fuel efficiency.

在设计发动机时，工程师必须考虑缸径行程比以优化燃油效率。

4.A higher bore-stroke ratio often results in a more powerful engine, suitable for racing applications.

较高的缸径行程比通常会导致更强大的发动机，适合赛车应用。

5.The engine's performance can greatly depend on its bore-stroke ratio, which is the ratio of the diameter of the cylinder to its stroke length.

发动机的性能很大程度上取决于其缸径行程比，即气缸直径与行程长度的比率。

作文

The performance of an engine is influenced by various factors, one of which is the bore-stroke ratio (缸径与行程比). This term refers to the relationship between the diameter of the cylinder bore and the length of the piston stroke. Understanding the significance of this ratio can provide insights into engine design and performance characteristics.In internal combustion engines, the bore-stroke ratio plays a crucial role in determining how the engine operates. A higher bore-stroke ratio indicates that the bore is larger than the stroke, which can lead to a short-stroke design. This configuration typically allows for higher engine speeds, making it suitable for applications where rapid acceleration and high RPMs are desired, such as in sports cars and racing vehicles.Conversely, a lower bore-stroke ratio means that the stroke is longer than the bore, resulting in a long-stroke engine. Such engines are generally characterized by better torque at lower RPMs, making them ideal for heavy-duty applications like trucks and commercial vehicles. The choice between a high or low bore-stroke ratio ultimately depends on the intended use of the engine and the desired performance traits.Moreover, the bore-stroke ratio also affects fuel efficiency and emissions. Engines designed with a higher bore-stroke ratio may achieve better thermal efficiency due to their ability to operate at higher speeds. However, they might also produce higher levels of nitrogen oxides (NOx) emissions, which are harmful pollutants. On the other hand, engines with a lower bore-stroke ratio may have lower emissions but could sacrifice some performance capabilities.Another aspect to consider is how the bore-stroke ratio interacts with other engine parameters, such as compression ratio and valve timing. Engineers must balance these factors during the design phase to optimize engine performance while adhering to emission regulations and fuel economy standards. For example, modifying the bore-stroke ratio can influence the compression ratio, which is critical for maximizing power output and efficiency.In conclusion, the bore-stroke ratio (缸径与行程比) is a fundamental concept in engine design that significantly impacts performance, efficiency, and emissions. By understanding this ratio, engineers can tailor engines to meet specific needs, whether for speed, power, or fuel economy. As automotive technology continues to evolve, the importance of optimizing the bore-stroke ratio will remain a key focus for manufacturers aiming to produce more efficient and environmentally friendly vehicles.

发动机的性能受到多种因素的影响，其中之一就是bore-stroke ratio（缸径与行程比）。这个术语指的是气缸缸径的直径与活塞行程长度之间的关系。理解这一比率的意义可以为我们提供有关发动机设计和性能特征的深入见解。在内燃机中，bore-stroke ratio起着至关重要的作用，决定了发动机的运行方式。较高的bore-stroke ratio表示缸径大于行程，这通常会导致短行程设计。这种配置通常允许更高的发动机转速，使其适用于需要快速加速和高转速的应用，例如跑车和赛车。相反，较低的bore-stroke ratio意味着行程长于缸径，从而导致长行程发动机。这种发动机通常在较低转速下具有更好的扭矩，使其理想用于卡车和商用车辆等重型应用。选择高或低的bore-stroke ratio最终取决于发动机的预期用途和所需的性能特征。此外，bore-stroke ratio还影响燃油效率和排放。设计时采用较高bore-stroke ratio的发动机可能由于能够在更高速度下运行而实现更好的热效率。然而，它们也可能产生更高水平的氮氧化物（NOx）排放，这些都是有害污染物。另一方面，具有较低bore-stroke ratio的发动机可能具有更低的排放，但可能牺牲一些性能能力。另一个需要考虑的方面是bore-stroke ratio如何与其他发动机参数（如压缩比和气门正时）相互作用。工程师在设计阶段必须平衡这些因素，以优化发动机性能，同时遵循排放法规和燃油经济性标准。例如，修改bore-stroke ratio可以影响压缩比，这是最大化功率输出和效率的关键。总之，bore-stroke ratio（缸径与行程比）是发动机设计中的一个基本概念，显著影响性能、效率和排放。通过理解这一比率，工程师可以根据特定需求定制发动机，无论是速度、动力还是燃油经济性。随着汽车技术的不断发展，优化bore-stroke ratio的重要性将继续成为制造商生产更高效和环保车辆的关键焦点。