four-cycle engine

简明释义

四冲程发动机

英英释义

例句

1.Many motorcycles utilize a four-cycle engine 四冲程发动机 for better fuel efficiency.

许多摩托车采用四冲程发动机以提高燃油效率。

2.The four-cycle engine 四冲程发动机 is known for its smooth operation and lower emissions.

四冲程发动机以其平稳的运行和较低的排放而闻名。

3.The four-cycle engine 四冲程发动机 is commonly used in most modern cars.

大多数现代汽车都使用四冲程发动机。

4.When buying a lawn mower, you might want to choose one with a four-cycle engine 四冲程发动机 for quieter performance.

在购买割草机时，您可能希望选择一款配有四冲程发动机的型号，以获得更安静的性能。

5.A four-cycle engine 四冲程发动机 operates on four distinct strokes: intake, compression, power, and exhaust.

四冲程发动机的工作过程包括四个不同的行程：进气、压缩、功率和排气。

作文

The concept of a four-cycle engine is fundamental in the world of internal combustion engines. This type of engine operates on a four-stroke cycle, which includes intake, compression, power, and exhaust strokes. Each of these strokes plays a crucial role in the overall functioning of the engine, allowing it to convert fuel into mechanical energy efficiently.To begin with, the first stroke in the four-cycle engine process is the intake stroke. During this phase, the engine draws in a mixture of air and fuel through the intake valve as the piston moves down the cylinder. This is a critical step because the quality and quantity of the air-fuel mixture directly influence the engine's performance. A well-timed intake stroke ensures that the engine receives the optimal amount of fuel and air for combustion.Following the intake stroke is the compression stroke. In this phase, the piston moves back up the cylinder, compressing the air-fuel mixture. This compression is vital because it increases the temperature and pressure of the mixture, making it more combustible. The efficiency of the four-cycle engine largely depends on how effectively this compression occurs; a higher compression ratio typically results in more power output.Next comes the power stroke, which is arguably the most critical part of the four-cycle engine cycle. At the top of the compression stroke, a spark plug ignites the compressed air-fuel mixture. This ignition causes a rapid expansion of gases, forcing the piston down the cylinder and producing power. This power is what ultimately drives the vehicle or machinery connected to the engine. The efficiency of this power stroke can significantly impact the overall performance and fuel economy of the engine.Finally, the exhaust stroke completes the cycle. As the piston moves back up the cylinder, the exhaust valve opens, allowing the spent gases to escape. This step is essential for maintaining the engine's efficiency; if exhaust gases are not expelled properly, they can interfere with the intake of fresh air-fuel mixtures in the next cycle. Thus, the design and timing of the exhaust system are crucial for the optimal operation of a four-cycle engine.In conclusion, understanding how a four-cycle engine works is vital for anyone interested in automotive technology or mechanics. Each stroke in the cycle has its own importance and contributes to the overall efficiency and performance of the engine. Modern advancements have led to the development of various types of four-cycle engines, including those used in cars, motorcycles, and lawn equipment. As technology continues to evolve, the principles behind the four-cycle engine will remain a cornerstone of engine design, ensuring that we continue to benefit from reliable and efficient power sources for years to come.

四冲程发动机的概念在内燃机的世界中是基础。这种类型的发动机在四个冲程循环中运行，包括进气、压缩、动力和排气冲程。每个冲程在发动机的整体运作中都发挥着至关重要的作用，使其能够有效地将燃料转化为机械能。首先，四冲程发动机过程中的第一个冲程是进气冲程。在这个阶段，随着活塞向下移动，发动机通过进气阀吸入空气和燃料的混合物。这是一个关键步骤，因为空气-燃料混合物的质量和数量直接影响发动机的性能。及时的进气冲程确保发动机接收到最佳量的燃料和空气进行燃烧。接下来是压缩冲程。在这一阶段，活塞向上移动，压缩空气-燃料混合物。这个压缩是至关重要的，因为它提高了混合物的温度和压力，使其更易燃。四冲程发动机的效率在很大程度上取决于这种压缩的有效性；较高的压缩比通常会导致更高的功率输出。接下来是动力冲程，这无疑是四冲程发动机循环中最关键的部分。在压缩冲程的顶部，火花塞点燃压缩的空气-燃料混合物。这次点燃导致气体迅速膨胀，迫使活塞向下移动并产生动力。这个动力最终驱动连接到发动机的车辆或机械。这个动力冲程的效率可以显著影响发动机的整体性能和燃油经济性。最后，排气冲程完成了整个循环。当活塞再次向上移动时，排气阀打开，允许废气排出。这个步骤对于保持发动机的效率至关重要；如果废气没有被妥善排出，它们可能会干扰下一个循环中新鲜空气-燃料混合物的进气。因此，排气系统的设计和时机对四冲程发动机的最佳运行至关重要。总之，理解四冲程发动机的工作原理对于任何对汽车技术或机械感兴趣的人来说都是至关重要的。循环中的每个冲程都有其重要性，并对发动机的整体效率和性能做出贡献。现代技术的进步导致了各种类型的四冲程发动机的开发，包括用于汽车、摩托车和草坪设备的发动机。随着技术的不断发展，四冲程发动机背后的原理将继续成为发动机设计的重要基石，确保我们在未来几年继续受益于可靠和高效的动力源。