exhaust stroke

简明释义

排气行程

英英释义

例句

1.In a four-stroke engine, the exhaust stroke follows the power stroke.

在四冲程发动机中，排气冲程紧随动力冲程之后。

2.The efficiency of an engine can be affected by how well it performs the exhaust stroke.

发动机的效率可能会受到其执行排气冲程的效果影响。

3.The timing of the exhaust stroke is crucial for optimal engine performance.

对于最佳发动机性能来说，排气冲程的时机至关重要。

4.During the exhaust stroke, the engine expels the burnt gases from the combustion chamber.

在排气冲程中，发动机将燃烧后的气体从燃烧室排出。

5.If the exhaust stroke is not completed properly, it can lead to increased emissions.

如果排气冲程没有正确完成，可能会导致排放增加。

作文

The internal combustion engine is a marvel of engineering, and understanding its operation can reveal the intricacies of modern machinery. One of the critical phases in the four-stroke cycle of an engine is the exhaust stroke, which plays a significant role in ensuring that the engine runs efficiently. To comprehend the importance of the exhaust stroke, it is essential to first understand the entire four-stroke process: intake, compression, power, and exhaust.During the intake stroke, the engine draws in a mixture of air and fuel. This mixture is essential for combustion, which occurs in the next phase, the compression stroke. Here, the piston moves up in the cylinder, compressing the fuel-air mixture to prepare it for ignition. Once the mixture is compressed, the spark plug ignites it, leading to the power stroke where the explosion pushes the piston down, generating power to turn the crankshaft.After the power stroke, the engine must expel the burnt gases from the combustion process. This is where the exhaust stroke comes into play. During this phase, the piston moves back up the cylinder, forcing the spent gases out through the exhaust valves. The efficiency of this process is crucial; if the exhaust stroke is not executed properly, residual gases can remain in the cylinder, which can lead to poor engine performance and increased emissions.The exhaust stroke is often overlooked, but it is just as vital as the other strokes in the cycle. It ensures that the engine can breathe properly, allowing fresh air and fuel to enter for the next cycle. If the exhaust system is clogged or damaged, it can hinder the exhaust stroke, leading to a decrease in overall engine efficiency. Mechanics and engineers must pay close attention to this phase during maintenance and repairs.In modern engines, advancements in technology have led to the development of more efficient exhaust systems. Turbochargers and catalytic converters are designed to maximize the effectiveness of the exhaust stroke, improving performance while reducing harmful emissions. Understanding the dynamics of the exhaust stroke is essential for anyone involved in automotive engineering or maintenance.Furthermore, the concept of the exhaust stroke extends beyond just internal combustion engines. Similar principles apply to other types of engines, such as those used in aviation or even in certain industrial applications. Recognizing the significance of this stroke can help engineers design better systems that promote efficiency and sustainability.In conclusion, the exhaust stroke is a fundamental aspect of the internal combustion engine's operation. It may seem like a simple movement, but its implications are far-reaching. For optimal engine performance, a thorough understanding of each component of the four-stroke cycle, especially the exhaust stroke, is essential. This knowledge not only aids in better engine design but also contributes to the ongoing efforts to make engines cleaner and more efficient, ultimately benefiting both the environment and the economy.

内燃机是一项工程奇迹，理解其运作可以揭示现代机械的复杂性。在发动机的四冲程循环中，一个关键阶段是排气行程，它在确保发动机高效运行方面发挥着重要作用。要理解排气行程的重要性，首先需要了解整个四冲程过程：进气、压缩、动力和排气。在进气行程中，发动机吸入一混合空气和燃料。这种混合物是燃烧所必需的，燃烧发生在下一个阶段，即压缩行程。在这个阶段，活塞在气缸内向上移动，压缩燃料-空气混合物，为点火做准备。一旦混合物被压缩，火花塞点燃它，导致动力行程，其中爆炸将活塞向下推动，产生转动曲轴的动力。在动力行程之后，发动机必须排出燃烧过程中产生的废气。这就是排气行程发挥作用的地方。在这个阶段，活塞再次向上移动，迫使废气通过排气阀排出。这个过程的效率至关重要；如果排气行程没有正确执行，残余气体可能会留在气缸中，这会导致发动机性能下降和排放增加。排气行程往往被忽视，但它与循环中的其他行程同样重要。它确保发动机能够正常呼吸，使新鲜空气和燃料能够进入下一循环。如果排气系统堵塞或损坏，可能会阻碍排气行程，导致整体发动机效率下降。机械师和工程师在维护和修理时必须特别注意这个阶段。在现代发动机中，技术的进步促使更高效的排气系统的发展。涡轮增压器和催化转换器旨在最大限度地提高排气行程的有效性，提高性能，同时减少有害排放。对于任何参与汽车工程或维护的人来说，理解排气行程的动态至关重要。此外，排气行程的概念不仅限于内燃机。类似的原理适用于其他类型的发动机，例如航空发动机或某些工业应用中的发动机。认识到这一行程的重要性可以帮助工程师设计出更好的系统，促进效率和可持续性。总之，排气行程是内燃机操作的基本方面。它看似简单的运动，但其影响深远。为了获得最佳发动机性能，彻底理解四冲程循环的每个组成部分，尤其是排气行程，是至关重要的。这种知识不仅有助于更好的发动机设计，还有助于持续努力使发动机更加清洁和高效，最终使环境和经济受益。