cylinder scavenging

简明释义

气缸扫气

英英释义

例句

1.A well-designed exhaust system can improve cylinder scavenging efficiency.

良好的排气系统可以提高气缸排气效率。

2.Improving cylinder scavenging can lead to better fuel economy.

改善气缸排气可以提高燃油经济性。

3.The efficiency of the engine largely depends on the effectiveness of cylinder scavenging.

发动机的效率在很大程度上取决于气缸排气的有效性。

4.Engine designers focus on cylinder scavenging to enhance performance.

发动机设计师专注于气缸排气以提升性能。

5.The two-stroke engine operates on the principle of cylinder scavenging.

二冲程发动机的工作原理是基于气缸排气。

作文

Cylinder scavenging is a critical process in the operation of two-stroke engines, which are widely used in various applications, from motorcycles to lawn mowers. In simple terms, cylinder scavenging (气缸清扫) refers to the method by which exhaust gases are expelled from the combustion chamber and replaced with fresh air-fuel mixture. This process is essential for maintaining engine efficiency and performance. In a two-stroke engine, the cycle consists of two strokes of the piston, completing one power cycle. Unlike four-stroke engines, where the intake and exhaust processes are separated into different strokes, two-stroke engines combine these processes, leading to a more compact design and lighter weight. However, this design also presents challenges, particularly in the scavenging process. The effectiveness of cylinder scavenging (气缸清扫) directly impacts the engine's power output and emissions. If the scavenging process is inefficient, remnants of exhaust gases can linger in the cylinder, leading to a phenomenon known as 'short-circuiting.' This occurs when the fresh charge is lost through the exhaust port before it can fully combust, resulting in a loss of power and an increase in unburned hydrocarbons in the exhaust. To optimize cylinder scavenging (气缸清扫), engineers have developed various methods. One common technique is the use of multiple exhaust ports, which allows for better expulsion of exhaust gases and improved intake of fresh air-fuel mixture. Another method involves tuning the shape and size of the ports to enhance the flow dynamics within the cylinder, creating a more effective scavenging action. In addition to mechanical modifications, the timing of the intake and exhaust events plays a crucial role in cylinder scavenging (气缸清扫). The synchronization of these events ensures that the maximum amount of exhaust gas is removed before the new charge enters the cylinder. Advanced electronic engine management systems can help optimize this timing, further improving engine performance and reducing emissions. Moreover, the fuel used in two-stroke engines can also influence the efficiency of cylinder scavenging (气缸清扫). Fuels with lower volatility may not vaporize effectively, leading to poor combustion and increased emissions. Therefore, selecting the right fuel is vital for achieving optimal scavenging and overall engine performance. In conclusion, cylinder scavenging (气缸清扫) is a fundamental aspect of two-stroke engine operation that significantly affects performance, efficiency, and emissions. Understanding the principles behind this process is essential for anyone involved in engine design or maintenance. By optimizing scavenging techniques, engineers can enhance engine performance, reduce environmental impact, and ensure that these engines meet the demands of modern applications. As technology continues to advance, the methods for improving cylinder scavenging (气缸清扫) will likely evolve, leading to even more efficient and cleaner-running engines in the future.

气缸清扫是两冲程发动机运作中的一个关键过程，这种发动机广泛应用于从摩托车到割草机的各种设备中。简单来说，cylinder scavenging（气缸清扫）指的是将废气排出燃烧室并用新鲜的空气-燃料混合物替换的方式。这个过程对于维持发动机的效率和性能至关重要。在两冲程发动机中，循环由活塞的两个行程组成，完成一个动力循环。与四冲程发动机不同，四冲程发动机将进气和排气过程分开到不同的行程中，而两冲程发动机将这些过程结合在一起，从而实现了更紧凑的设计和更轻的重量。然而，这种设计也带来了挑战，特别是在清扫过程中。cylinder scavenging（气缸清扫）的有效性直接影响发动机的功率输出和排放。如果清扫过程效率低下，废气残留在气缸中，就会出现一种现象，称为“短路”。当新鲜混合气体在完全燃烧之前就通过排气口流失时，就会导致功率损失，并且排放中未燃烧的碳氢化合物增加。为了优化cylinder scavenging（气缸清扫），工程师们开发了多种方法。一种常见的技术是使用多个排气口，这可以更好地排出废气并改善新鲜空气-燃料混合物的吸入。另一种方法涉及调整气口的形状和大小，以增强气缸内的流动动态，从而创造出更有效的清扫作用。除了机械改进，进气和排气事件的时机在cylinder scavenging（气缸清扫）中也起着至关重要的作用。这些事件的同步确保在新混合气进入气缸之前，尽可能多的废气被去除。先进的电子发动机管理系统可以帮助优化这一时机，进一步提高发动机性能并减少排放。此外，用于两冲程发动机的燃料也会影响cylinder scavenging（气缸清扫）的效率。挥发性较低的燃料可能无法有效蒸发，导致燃烧不良和排放增加。因此，选择合适的燃料对于实现最佳清扫和整体发动机性能至关重要。总之，cylinder scavenging（气缸清扫）是两冲程发动机运作的一个基本方面，对性能、效率和排放有显著影响。理解这一过程背后的原理对于任何参与发动机设计或维护的人来说都是至关重要的。通过优化清扫技术，工程师可以提升发动机性能，减少环境影响，并确保这些发动机满足现代应用的需求。随着技术的不断进步，改善cylinder scavenging（气缸清扫）的方法可能会不断演变，从而使未来的发动机更加高效和清洁。