four-stroke cycle

简明释义

四冲程循环

英英释义

例句

1.Understanding the four-stroke cycle can help you troubleshoot engine problems more effectively.

理解四冲程循环可以帮助你更有效地排查发动机问题。

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

该发动机采用四冲程循环，这意味着它每两圈完成一次动力冲程。

3.Many lawn mowers use a four-stroke cycle engine to reduce emissions.

许多割草机使用四冲程循环发动机以减少排放。

4.The four-stroke cycle consists of intake, compression, power, and exhaust strokes.

四冲程循环包括进气、压缩、动力和排气冲程。

5.In a typical motorcycle, the four-stroke cycle is essential for achieving better fuel efficiency.

在典型的摩托车中，四冲程循环对实现更好的燃油效率至关重要。

作文

The internal combustion engine is a remarkable invention that has transformed the way we live and work. One of the most common types of internal combustion engines is the four-stroke engine. The term four-stroke cycle refers to the process by which these engines operate, and understanding this cycle is crucial for anyone interested in mechanics or automotive technology.The four-stroke cycle consists of four distinct strokes: intake, compression, power, and exhaust. Each stroke corresponds to a specific phase in the engine's operation, allowing it to convert fuel into mechanical energy efficiently. During the intake stroke, the engine draws in a mixture of air and fuel through the intake valve. This is the first step in the four-stroke cycle, where the piston moves downwards, creating a vacuum that pulls the fuel-air mixture into the cylinder.Next comes the compression stroke. As the piston moves back up, it compresses the fuel-air mixture, raising its temperature and pressure. This is a critical phase in the four-stroke cycle because a higher compression ratio leads to more efficient combustion. When the piston reaches the top of its stroke, the spark plug ignites the compressed mixture, resulting in a powerful explosion that forces the piston down during the power stroke.The power stroke is where the engine generates its power. The explosion pushes the piston down, turning the crankshaft and ultimately powering the vehicle. This is the most significant part of the four-stroke cycle, as it transforms the chemical energy stored in the fuel into mechanical energy that can be harnessed to move the vehicle.Finally, we arrive at the exhaust stroke. After the power stroke, the piston moves back up again, pushing the spent gases out of the cylinder through the exhaust valve. This clears the way for the next cycle to begin, completing the four-stroke cycle.Understanding the four-stroke cycle is not just important for mechanics; it also helps us appreciate the efficiency and design of modern engines. Innovations in engine technology have focused on optimizing each of these four strokes to maximize power output while minimizing fuel consumption and emissions. For example, advancements like variable valve timing and turbocharging have improved the performance of the four-stroke cycle engine, making it more powerful and environmentally friendly.In conclusion, the four-stroke cycle is a fundamental concept in the world of internal combustion engines. By breaking down the process into its four strokes—intake, compression, power, and exhaust—we can better understand how these engines work and the importance of each phase. As technology continues to evolve, so too will the four-stroke cycle, leading to even more efficient and powerful engines in the future. Whether you are a car enthusiast or simply someone who relies on vehicles for daily transportation, a basic understanding of the four-stroke cycle can enhance your appreciation for the intricate machinery that powers our modern world.

内燃机是一项了不起的发明，改变了我们的生活和工作方式。最常见的内燃机类型之一是四冲程发动机。术语四冲程循环指的是这些发动机的工作过程，理解这个循环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。四冲程循环由四个不同的冲程组成：进气、压缩、动力和排气。每个冲程对应于发动机操作中的特定阶段，使其能够高效地将燃料转化为机械能。在进气冲程中，发动机通过进气阀吸入空气和燃料的混合物。这是四冲程循环的第一步，活塞向下移动，产生真空，将燃料-空气混合物吸入气缸。接下来是压缩冲程。当活塞再次向上移动时，它压缩燃料-空气混合物，提高其温度和压力。这是在四冲程循环中一个关键的阶段，因为更高的压缩比会导致更高效的燃烧。当活塞到达冲程的顶部时，火花塞点燃压缩混合物，导致强大的爆炸，迫使活塞在动力冲程中向下移动。动力冲程是发动机产生动力的地方。爆炸将活塞向下推，转动曲轴，最终为车辆提供动力。这是四冲程循环中最重要的部分，因为它将储存在燃料中的化学能转化为可以用来移动车辆的机械能。最后，我们进入排气冲程。在动力冲程之后，活塞再次向上移动，通过排气阀将废气推出气缸。这为下一个循环的开始清除了道路，完成了四冲程循环。理解四冲程循环不仅对机械师重要，它也帮助我们欣赏现代发动机的效率和设计。发动机技术的创新集中在优化这四个冲程，以最大化输出功率，同时最小化燃料消耗和排放。例如，像可变气门正时和涡轮增压这样的进步改善了四冲程循环发动机的性能，使其更强大且更环保。总之，四冲程循环是内燃机世界中的一个基本概念。通过将这一过程分解为四个冲程——进气、压缩、动力和排气，我们可以更好地理解这些发动机的工作原理以及每个阶段的重要性。随着技术的不断发展，四冲程循环也将不断演变，未来将出现更高效、更强大的发动机。无论你是汽车爱好者还是只是依赖车辆进行日常交通的人，基本了解四冲程循环都能增强你对推动我们现代世界复杂机械的欣赏。