exhaust stroke

简明释义

排气冲程

英英释义

例句

1.The efficiency of an engine can be affected by how effectively the exhaust stroke removes gases.

发动机的效率可能会受到排气冲程有效去除气体能力的影响。

2.A malfunctioning valve can hinder the exhaust stroke, leading to decreased power.

故障的阀门会妨碍排气冲程，导致功率下降。

3.Proper timing during the exhaust stroke ensures optimal performance of the engine.

在排气冲程期间适当的时机确保发动机的最佳性能。

4.In a four-stroke engine, the exhaust stroke is the final phase of the cycle.

在四冲程发动机中，排气冲程是循环的最后阶段。

5.During the exhaust stroke, the piston pushes out the burnt gases from the cylinder.

在排气冲程中，活塞将燃烧的废气从气缸中推出。

作文

The internal combustion engine is a marvel of engineering that powers many of the vehicles we use today. Understanding the various strokes involved in this engine's operation is essential for anyone interested in mechanics or automotive technology. One of the critical phases in the four-stroke cycle of an internal combustion engine is the exhaust stroke, which plays a vital role in ensuring the engine runs efficiently and effectively. During this phase, the engine expels the burnt gases from the combustion chamber, making way for fresh air and fuel to enter during the next intake stroke.The exhaust stroke occurs after the power stroke, where the engine has already converted the energy from the fuel into mechanical power. At this point, the piston moves upward in the cylinder, pushing the spent gases out through the open exhaust valve. This process is crucial because it helps to maintain the engine's performance and prevents the accumulation of harmful gases that could lead to engine knocking or reduced efficiency.In a typical four-stroke engine, the cycle begins with the intake stroke, where the piston moves down, drawing in a mixture of air and fuel. Following this, the compression stroke occurs, compressing the air-fuel mixture to prepare for ignition. The power stroke follows, where the spark plug ignites the mixture, forcing the piston down and generating power. Finally, the exhaust stroke completes the cycle by clearing the chamber of exhaust gases, allowing the whole process to start anew.The efficiency of the exhaust stroke can significantly influence the overall performance of the engine. If the exhaust gases are not expelled effectively, they can create back pressure, which may hinder the intake of fresh air and fuel. This can lead to a decrease in power output and fuel efficiency. Engineers often focus on optimizing the exhaust system to ensure that the gases exit the engine smoothly and quickly, enhancing the engine's performance.Moreover, the design of the exhaust system, including components like mufflers and catalytic converters, also plays a significant role in managing emissions and noise. Modern engines are designed to meet stringent environmental regulations, and the exhaust stroke is integral to ensuring that harmful pollutants are minimized before they are released into the atmosphere.In conclusion, the exhaust stroke is a fundamental component of the internal combustion engine's operation. It ensures that spent gases are efficiently removed, paving the way for optimal performance and compliance with environmental standards. Understanding this stroke not only aids in grasping the mechanics of engines but also highlights the importance of engineering advancements in creating cleaner and more efficient vehicles for the future.

内燃机是一项工程的奇迹，它为我们今天使用的许多车辆提供动力。理解这种发动机运行中涉及的各种冲程对于任何对机械或汽车技术感兴趣的人来说都是至关重要的。在内燃机的四冲程循环中，一个关键阶段是排气冲程，它在确保发动机高效且有效地运行中发挥着重要作用。在这个阶段，发动机将燃烧后的气体从燃烧室中排出，为下一次进气冲程进入新鲜的空气和燃料腾出空间。排气冲程发生在功率冲程之后，此时发动机已经将燃料中的能量转化为机械动力。在这一点上，活塞向上移动，推动废气通过打开的排气阀排出。这个过程至关重要，因为它有助于保持发动机的性能，并防止有害气体的积累，这可能导致发动机敲击或效率降低。在典型的四冲程发动机中，循环始于进气冲程，活塞向下移动，吸入空气和燃料的混合物。随后发生压缩冲程，压缩空气-燃料混合物以准备点火。功率冲程随之而来，火花塞点燃混合物，迫使活塞向下运动并产生动力。最后，排气冲程通过清除排气气体完成循环，使整个过程重新开始。排气冲程的效率可以显著影响发动机的整体性能。如果废气未能有效排出，可能会造成背压，从而妨碍新鲜空气和燃料的吸入。这可能导致功率输出和燃油效率的降低。工程师们通常专注于优化排气系统，以确保气体顺利迅速地排出发动机，从而提升发动机性能。此外，排气系统的设计，包括消声器和催化转化器等组件，也在管理排放和噪音方面发挥着重要作用。现代发动机被设计成符合严格的环境法规，而排气冲程在确保有害污染物在释放到大气之前被最小化方面至关重要。总之，排气冲程是内燃机运行的基本组成部分。它确保废气被有效地排除，为最佳性能和遵守环境标准铺平道路。理解这个冲程不仅有助于掌握发动机的机械原理，还突出了工程进步在创造更清洁、更高效的未来车辆中的重要性。