two stroke cycle

简明释义

二冲程循环

英英释义

例句

1.The two stroke cycle is often less fuel-efficient than a four-stroke cycle engine.

与四冲程发动机相比，两冲程循环通常燃油效率较低。

2.Many small motorcycles use a two stroke cycle for increased power-to-weight ratio.

许多小型摩托车使用两冲程循环以提高功率与重量比。

3.In a two stroke cycle, fuel and air mix in the crankcase before entering the combustion chamber.

在两冲程循环中，燃料和空气在曲轴箱中混合，然后进入燃烧室。

4.The simplicity of the two stroke cycle design makes it popular for chainsaws and leaf blowers.

由于设计简单，两冲程循环在链锯和吹叶机中很受欢迎。

5.The engine operates on a two stroke cycle, which means it completes a power stroke every two revolutions.

这台发动机采用两冲程循环，这意味着它每两圈完成一次动力冲程。

作文

The two stroke cycle is a fundamental concept in the world of engines, particularly in small engines used for motorcycles, chainsaws, and lawnmowers. Unlike the more common four-stroke cycle, which requires four distinct strokes to complete one power cycle, the two stroke cycle accomplishes this in just two strokes of the piston. This efficiency makes it a popular choice for applications where weight and simplicity are critical factors.In a two stroke cycle, the process begins with the downward motion of the piston. As the piston moves down, it creates a vacuum that draws in a mixture of air and fuel into the crankcase. At the same time, the exhaust from the previous cycle is expelled through the exhaust port. This simultaneous intake and exhaust process is what differentiates the two stroke cycle from its four-stroke counterpart, where these actions occur separately.Once the piston reaches the bottom of its stroke, it reverses direction and moves upward. During this upward motion, the compressed air-fuel mixture in the crankcase is forced into the combustion chamber above the piston. As the piston approaches the top of its stroke, the spark plug ignites the mixture, causing an explosion that forces the piston back down. This entire process happens rapidly, allowing the two stroke cycle engine to produce power with every revolution of the crankshaft.One of the main advantages of the two stroke cycle engine is its power-to-weight ratio. Because it produces power on every revolution, it can generate more power in a smaller, lighter package compared to a four-stroke engine. This is particularly beneficial in applications like racing motorcycles, where performance and weight are crucial. Additionally, the design of a two stroke cycle engine is often simpler, with fewer moving parts and less complexity in the valvetrain. This simplicity not only makes it easier to manufacture but also to repair and maintain.However, the two stroke cycle engine is not without its downsides. One significant drawback is its environmental impact. Because the engine burns oil mixed with fuel, it tends to produce more emissions and consume more fuel than a comparable four-stroke engine. Furthermore, the lubrication system in a two stroke cycle engine is less efficient, leading to increased wear and tear over time.In recent years, advancements in technology have led to the development of cleaner and more efficient two stroke cycle engines. Manufacturers are now exploring ways to reduce emissions while maintaining the power and efficiency that these engines are known for. Innovations such as direct fuel injection and improved exhaust systems are helping to mitigate some of the environmental concerns associated with traditional two stroke cycle designs.In conclusion, the two stroke cycle remains an important part of engine technology, particularly for applications where weight, simplicity, and power are paramount. While there are challenges to overcome regarding emissions and longevity, ongoing advancements in engineering continue to improve the efficiency and environmental impact of these engines. Understanding the mechanics and advantages of the two stroke cycle is essential for anyone interested in the field of mechanics or automotive engineering. With the right knowledge and innovations, the future of two stroke cycle engines looks promising and full of potential.

两冲程循环是发动机世界中的一个基本概念，特别是在摩托车、链锯和割草机等小型发动机中。与更常见的四冲程循环不同，四冲程循环需要四个不同的冲程来完成一个动力循环，而两冲程循环只需两个活塞冲程即可实现这一点。这种高效性使其成为在重量和简易性至关重要的应用中的热门选择。在两冲程循环中，过程始于活塞向下运动。当活塞向下移动时，它会产生一个真空，将空气和燃料的混合物吸入曲轴箱。同时，上一个循环的废气通过排气口排出。这种同时进气和排气的过程就是将两冲程循环与其四冲程对立的地方，在四冲程中，这些动作是分开进行的。一旦活塞到达冲程的底部，它就会反转方向并向上移动。在这个向上的运动过程中，曲轴箱中压缩的空气-燃料混合物被迫进入活塞上方的燃烧室。当活塞接近冲程的顶部时，火花塞点燃混合物，导致爆炸将活塞再次向下推动。整个过程迅速发生，使得两冲程循环发动机能够在每次曲轴旋转中产生动力。两冲程循环发动机的主要优点之一是其功率与重量的比率。由于它在每次旋转时都会产生动力，因此可以在较小、更轻的包装中生成比四冲程发动机更多的动力。这在赛车摩托车等对性能和重量至关重要的应用中尤为有利。此外，两冲程循环发动机的设计通常更简单，活动部件更少，气门机构的复杂性较低。这种简单性不仅使其制造更容易，还使维修和维护变得更加方便。然而，两冲程循环发动机也不是没有缺点的。一个显著的缺点是其对环境的影响。由于发动机燃烧混合了油的燃料，它往往会产生比可比的四冲程发动机更多的排放并消耗更多的燃料。此外，两冲程循环发动机的润滑系统效率较低，导致随着时间的推移磨损加剧。近年来，技术进步导致了更清洁和更高效的两冲程循环发动机的发展。制造商现在正在探索减少排放的方法，同时保持这些发动机所知的动力和效率。诸如直接燃油喷射和改进的排气系统等创新正在帮助减轻与传统两冲程循环设计相关的一些环境问题。总之，两冲程循环仍然是发动机技术的重要组成部分，特别是在重量、简单性和动力至关重要的应用中。尽管在排放和耐久性方面面临挑战，但工程领域的持续进步仍在改善这些发动机的效率和环境影响。理解两冲程循环的机械原理及其优势对于任何对机械或汽车工程感兴趣的人来说都是至关重要的。凭借正确的知识和创新，两冲程循环发动机的未来看起来充满希望和潜力。