compression stroke

简明释义

压缩冲程

英英释义

例句

1.The efficiency of an engine largely depends on the compression stroke and how well it compresses the mixture.

发动机的效率在很大程度上取决于压缩行程以及它压缩混合物的效果。

2.If the compression stroke is too weak, the engine will not generate enough power.

如果压缩行程过弱，发动机将无法产生足够的动力。

3.During the engine's compression stroke, the piston moves upward, compressing the air-fuel mixture.

在发动机的压缩行程中，活塞向上移动，压缩空气-燃料混合物。

4.Proper maintenance ensures that the compression stroke functions optimally.

适当的维护确保压缩行程的最佳功能。

5.In a four-stroke engine, the compression stroke follows the intake stroke.

在四冲程发动机中，压缩行程紧随进气行程之后。

作文

The internal combustion engine is a marvel of engineering that has transformed the way we travel and transport goods. At the heart of this engine's operation lies a series of carefully orchestrated movements, one of which is the compression stroke. This phase is critical in the engine cycle, as it directly influences the efficiency and power output of the engine. Understanding the compression stroke is essential for anyone interested in automotive technology or mechanical engineering.During the compression stroke of an engine, the piston moves upward within the cylinder, compressing the air-fuel mixture that was drawn in during the previous intake stroke. This compression increases the temperature and pressure of the mixture, making it more combustible. The importance of this process cannot be overstated; a higher compression ratio generally leads to better fuel efficiency and increased power. However, there is a fine balance to maintain, as too high a compression can lead to knocking, which can damage the engine.The compression stroke begins when the piston reaches the bottom dead center (BDC) and starts its ascent toward the top dead center (TDC). As the piston rises, the intake valve remains closed, sealing the combustion chamber. The air-fuel mixture is effectively trapped, and as the piston continues to move upward, the volume of the chamber decreases. This reduction in volume results in an increase in pressure and temperature, which prepares the mixture for ignition.Once the piston reaches TDC, the spark plug ignites the compressed air-fuel mixture, resulting in a rapid expansion of gases that pushes the piston back down during the power stroke. This sequence illustrates how the compression stroke plays a pivotal role in the overall performance of the engine. It not only prepares the mixture for combustion but also sets the stage for the energy release that propels the vehicle forward.In modern engines, various technologies have been developed to optimize the compression stroke. For instance, variable valve timing systems can adjust the timing of the intake and exhaust valves to improve the efficiency of the compression process. Additionally, turbocharging can enhance the density of the air entering the cylinder, allowing for a more powerful compression stroke without increasing the size of the engine.Understanding the mechanics of the compression stroke is crucial for diagnosing engine problems. Mechanics often look for signs of wear or damage during this phase, as issues such as worn piston rings or a blown head gasket can lead to decreased compression, resulting in poor engine performance. Regular maintenance and inspections can help ensure that the compression stroke operates smoothly, contributing to the longevity and reliability of the engine.In conclusion, the compression stroke is a fundamental aspect of the internal combustion engine's operation. It is a complex process that requires precise engineering and timing to achieve optimal performance. By understanding the significance of the compression stroke, automotive enthusiasts and professionals can better appreciate the intricacies of engine design and function. This knowledge not only enhances our understanding of vehicles but also informs future innovations in automotive technology, paving the way for more efficient and powerful engines.

内燃机是一项工程奇迹，改变了我们的出行和货物运输方式。在这台发动机运作的核心，存在着一系列精心协调的运动，其中之一就是压缩行程。这个阶段在发动机周期中至关重要，因为它直接影响着发动机的效率和功率输出。理解压缩行程对于任何对汽车技术或机械工程感兴趣的人来说都是必不可少的。在发动机的压缩行程中，活塞在气缸内向上移动，压缩之前吸入的空气-燃料混合物。这个压缩过程提高了混合物的温度和压力，使其更易燃。这一过程的重要性不容小觑；更高的压缩比通常意味着更好的燃油效率和更大的功率。然而，必须保持一个微妙的平衡，因为过高的压缩可能导致敲缸，这会损坏发动机。压缩行程开始于活塞到达下止点（BDC）并开始向上升起，直到到达上止点（TDC）。随着活塞的上升，进气阀保持关闭，密封了燃烧室。空气-燃料混合物被有效地困住，随着活塞继续向上移动，腔体的体积减少。这种体积的减少导致压力和温度的增加，为点火做好准备。一旦活塞到达TDC，火花塞点燃压缩的空气-燃料混合物，导致气体迅速膨胀，推动活塞在动力行程中向下移动。这个序列展示了压缩行程在发动机整体性能中的关键作用。它不仅为燃烧准备混合物，还为释放能量铺平了道路，从而推动车辆前进。在现代发动机中，已经开发出多种技术来优化压缩行程。例如，可变气门正时系统可以调整进气和排气阀的时机，以提高压缩过程的效率。此外，涡轮增压可以增强进入气缸的空气密度，在不增加发动机尺寸的情况下实现更强大的压缩行程。理解压缩行程的机械原理对于诊断发动机问题至关重要。机械师通常在这一阶段寻找磨损或损坏的迹象，因为活塞环磨损或气缸垫片破裂等问题会导致压缩降低，从而导致发动机性能下降。定期维护和检查可以确保压缩行程的顺利进行，促进发动机的耐久性和可靠性。总之，压缩行程是内燃机运作的基本方面。这是一个复杂的过程，需要精确的工程和时机来实现最佳性能。通过理解压缩行程的重要性，汽车爱好者和专业人士可以更好地欣赏发动机设计和功能的复杂性。这一知识不仅增强了我们对车辆的理解，也为未来汽车技术的创新提供了信息，为更高效、更强大的发动机铺平了道路。