four-stroke engine

简明释义

四冲程发动机

英英释义

例句

1.Compared to a two-stroke engine, a four-stroke engine produces fewer emissions.

与两冲程发动机相比，四冲程发动机产生的排放更少。

2.A four-stroke engine completes its power cycle in four distinct strokes: intake, compression, power, and exhaust.

四冲程发动机在四个不同的行程中完成其动力循环：进气、压缩、动力和排气。

3.The four-stroke engine in my car allows it to run smoothly and quietly.

我车里的四冲程发动机使其运行平稳且安静。

4.Many lawn mowers use a four-stroke engine for its reliability and ease of maintenance.

许多割草机使用四冲程发动机，因为它的可靠性和维护简便。

5.The motorcycle is powered by a four-stroke engine, which provides better fuel efficiency.

这款摩托车由一个四冲程发动机驱动，提供更好的燃油效率。

作文

The four-stroke engine is one of the most widely used types of internal combustion engines. It operates on a cycle that consists of four distinct strokes: intake, compression, power, and exhaust. Each of these strokes plays a crucial role in the overall functioning of the engine. Understanding how a four-stroke engine works is essential for anyone interested in automotive technology or engineering.During the intake stroke, the engine draws in a mixture of air and fuel through the intake valve. This is followed by the compression stroke, where the piston moves upward, compressing the air-fuel mixture to increase its temperature and pressure. This compression is vital for ensuring efficient combustion. Once the piston reaches the top of its stroke, a spark plug ignites the compressed mixture, resulting in a powerful explosion that drives the piston down during the power stroke. Finally, during the exhaust stroke, the exhaust valve opens, allowing the spent gases to escape from the cylinder, making way for a new cycle.The efficiency of a four-stroke engine is one of its significant advantages. Compared to two-stroke engines, which complete a power cycle in just two strokes, four-stroke engines are generally more fuel-efficient and produce fewer emissions. This is primarily because the design allows for better control over the combustion process and more effective exhaust removal. As a result, four-stroke engines are commonly found in cars, motorcycles, lawnmowers, and many other applications where reliability and efficiency are paramount.Moreover, the four-stroke engine has become synonymous with modern automotive engineering. The principles behind its operation have led to advancements in various technologies, including turbocharging and fuel injection systems. These innovations have further enhanced the performance and efficiency of four-stroke engines, making them even more appealing to manufacturers and consumers alike.In terms of maintenance, four-stroke engines typically require regular oil changes and periodic checks of components like spark plugs and filters. While they may be more complex than their two-stroke counterparts, the benefits they provide in terms of longevity and performance make them a popular choice. Understanding the intricacies of a four-stroke engine can empower vehicle owners to take better care of their engines and make informed decisions regarding repairs and upgrades.In conclusion, the four-stroke engine represents a critical development in the field of mechanical engineering. Its design and operational principles have paved the way for advancements in automotive technology, leading to more efficient and environmentally friendly vehicles. Whether you are a car enthusiast, an aspiring engineer, or simply someone curious about how machines work, grasping the fundamentals of the four-stroke engine is an invaluable part of understanding modern transportation. As we continue to innovate and seek more sustainable energy solutions, the four-stroke engine will likely remain a key player in the automotive landscape for years to come.

四冲程发动机是最广泛使用的内燃机类型之一。它的工作周期包括四个不同的冲程：进气、压缩、动力和排气。这些冲程在发动机的整体运行中发挥着至关重要的作用。理解四冲程发动机的工作原理对于任何对汽车技术或工程感兴趣的人来说都是必不可少的。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。接下来是压缩冲程，活塞向上移动，压缩空气-燃料混合物以增加其温度和压力。这个压缩对于确保高效燃烧至关重要。一旦活塞到达冲程的顶部，火花塞就会点燃压缩混合物，产生强大的爆炸力，使活塞向下运动，进入动力冲程。最后，在排气冲程中，排气阀打开，允许废气从气缸中排出，为新一轮循环腾出空间。四冲程发动机的效率是其显著的优势之一。与仅需两个冲程完成动力循环的二冲程发动机相比，四冲程发动机通常更省油，排放更少。这主要是因为其设计允许更好地控制燃烧过程和更有效地排放废气。因此，四冲程发动机常见于汽车、摩托车、割草机以及其他许多需要可靠性和效率的应用中。此外，四冲程发动机已成为现代汽车工程的代名词。其工作原理的基础促进了各种技术的进步，包括涡轮增压和燃油喷射系统。这些创新进一步提升了四冲程发动机的性能和效率，使其对制造商和消费者都更加具有吸引力。在维护方面，四冲程发动机通常需要定期更换机油，并定期检查火花塞和过滤器等部件。虽然它们可能比二冲程发动机更复杂，但在耐用性和性能方面所提供的好处使其成为一种受欢迎的选择。理解四冲程发动机的复杂性可以使车主更好地保养他们的发动机，并在维修和升级方面做出明智的决定。总之，四冲程发动机代表了机械工程领域的一项关键发展。它的设计和操作原理为汽车技术的进步铺平了道路，导致更高效和环保的车辆的出现。无论你是汽车爱好者、未来的工程师，还是仅仅对机器如何运作感到好奇，掌握四冲程发动机的基本知识都是理解现代交通的重要部分。随着我们继续创新并寻求更可持续的能源解决方案，四冲程发动机可能在未来几年内仍将是汽车领域的关键角色。