valve scavenging

简明释义

阀扫气

英英释义

例句

1.We implemented a new design that enhances valve scavenging efficiency.

我们实施了一种新设计，以提高阀门清扫效率。

2.Proper valve scavenging can reduce emissions in two-stroke engines.

适当的阀门清扫可以减少二冲程发动机的排放。

3.The engine's performance improved significantly after optimizing the valve scavenging process.

在优化了阀门清扫过程后，发动机的性能显著提高。

4.The research focused on how valve scavenging affects power output in racing engines.

研究集中在阀门清扫如何影响赛车发动机的功率输出。

5.Engine tuners often discuss the importance of valve scavenging for peak performance.

发动机调校师经常讨论阀门清扫对最佳性能的重要性。

作文

In the world of internal combustion engines, one term that often comes up is valve scavenging. This process is crucial for ensuring that an engine runs efficiently and produces the desired power output. To understand valve scavenging, we must first look at how internal combustion engines operate. These engines rely on a series of complex interactions between various components, including the pistons, valves, and fuel-air mixture. The primary purpose of the valves is to control the flow of this mixture into the combustion chamber and to allow exhaust gases to exit after combustion has taken place.During the intake stroke, the intake valve opens, allowing the air-fuel mixture to enter the cylinder. Once the piston moves back up during the compression stroke, the intake valve closes, and the mixture is compressed. After combustion occurs, the exhaust valve opens to let the burnt gases escape. However, if the exhaust gases are not effectively removed from the cylinder, they can mix with the incoming air-fuel mixture, leading to inefficient combustion and reduced engine performance. This is where valve scavenging comes into play.Valve scavenging refers to the process of clearing out exhaust gases from the combustion chamber to make room for fresh air-fuel mixture. This is particularly important in two-stroke engines, where the timing of the valve openings is critical to ensure that exhaust gases do not linger in the cylinder. If these gases are not adequately expelled, it can lead to a phenomenon known as 'reversion,' where the exhaust gases flow back into the intake system, contaminating the fresh mixture.There are various methods of valve scavenging utilized in modern engines. One common technique involves the use of tuned exhaust systems that create negative pressure waves, effectively pulling exhaust gases out of the cylinder as the piston moves down. Another method is the implementation of supercharging or turbocharging, which increases the intake pressure, helping to push out the exhaust gases more efficiently.Understanding valve scavenging is essential for engineers and mechanics alike, as it directly affects the performance, efficiency, and emissions of an engine. Properly designed scavenging systems can enhance engine output and reduce fuel consumption, making them a critical component in the design of high-performance engines.In summary, valve scavenging is a vital aspect of engine operation that ensures the effective removal of exhaust gases from the combustion chamber. By optimizing this process, engineers can significantly improve engine performance, reduce emissions, and enhance overall efficiency. As technology continues to advance, the methods and techniques used for valve scavenging will likely evolve, further pushing the boundaries of what internal combustion engines can achieve.

阀门清扫是内燃机领域中一个常见的术语。这个过程对于确保发动机高效运转和产生所需的功率输出至关重要。要理解阀门清扫，我们必须首先了解内燃机的工作原理。这些发动机依赖于各个组件之间复杂的相互作用，包括活塞、阀门和燃料-空气混合物。阀门的主要功能是控制这种混合物进入燃烧室的流动，并在燃烧发生后让废气排出。在进气冲程中，进气阀打开，允许空气-燃料混合物进入气缸。当活塞在压缩冲程中向上移动时，进气阀关闭，混合物被压缩。燃烧发生后，排气阀打开，让燃烧后的气体逸出。然而，如果废气没有有效地从气缸中排出，它们可能会与进入的空气-燃料混合物混合，导致燃烧效率降低和发动机性能下降。这就是阀门清扫发挥作用的地方。阀门清扫是指清除燃烧室内废气以腾出空间供新鲜空气-燃料混合物进入的过程。这在两冲程发动机中特别重要，因为阀门开启的时机对于确保废气不会滞留在气缸中至关重要。如果这些废气没有得到充分排出，就会导致一种现象称为“逆流”，即废气流回进气系统，污染新鲜的混合物。现代发动机中使用了多种阀门清扫方法。一种常见的技术是使用调谐排气系统，创造负压波，有效地在活塞向下移动时将废气抽出气缸。另一种方法是实施增压或涡轮增压，增加进气压力，有助于更有效地排出废气。理解阀门清扫对于工程师和机械师来说都是至关重要的，因为它直接影响发动机的性能、效率和排放。精心设计的清扫系统可以提高发动机输出并减少燃料消耗，使其成为高性能发动机设计中的关键组成部分。总之，阀门清扫是发动机运行的一个重要方面，确保有效去除燃烧室内的废气。通过优化这一过程，工程师可以显著改善发动机性能，减少排放，并提高整体效率。随着技术的不断进步，用于阀门清扫的方法和技术可能会不断演变，进一步推动内燃机所能达到的边界。