four-cycle internal combustion engine

简明释义

四冲程内燃机

英英释义

例句

1.Understanding how a four-cycle internal combustion engine works is essential for any mechanic.

理解四冲程内燃机的工作原理对任何机械师来说都是至关重要的。

2.The four-cycle internal combustion engine operates in four distinct strokes: intake, compression, power, and exhaust.

这个四冲程内燃机在四个不同的行程中工作：进气、压缩、动力和排气。

3.Many motorcycles use a four-cycle internal combustion engine for its balance of power and efficiency.

许多摩托车使用四冲程内燃机，因为它在动力和效率之间取得了平衡。

4.An efficient four-cycle internal combustion engine can significantly reduce emissions.

高效的四冲程内燃机可以显著减少排放。

5.The car is powered by a four-cycle internal combustion engine, which provides better fuel efficiency.

这辆车由一个四冲程内燃机驱动，提供更好的燃油效率。

作文

The four-cycle internal combustion engine is a fundamental component in many modern vehicles, powering everything from cars to motorcycles. Understanding how this engine works is essential for anyone interested in automotive technology or engineering. The term 'four-cycle' refers to the four distinct strokes that the engine's piston goes through during one complete cycle of operation: intake, compression, power, and exhaust. Each of these strokes plays a crucial role in the engine's overall performance and efficiency.During the intake stroke, the engine draws in a mixture of air and fuel. This process begins when the piston moves down the cylinder, creating a vacuum that pulls the air-fuel mixture into the combustion chamber. The efficiency of this stroke is vital because it sets the stage for the subsequent processes. If the correct amount of air and fuel is not drawn in, the engine may not operate optimally, leading to decreased power and increased emissions.Next comes the compression stroke. Once the piston reaches the bottom of the cylinder, it moves back up, compressing the air-fuel mixture. This compression is critical because it raises the temperature and pressure of the mixture, making it more combustible. A well-compressed mixture ensures a more powerful explosion during the next phase, which is the power stroke. The compression ratio, which is the ratio of the cylinder's volume when the piston is at the bottom to the volume when it is at the top, is an important factor in determining the engine's efficiency and power output.The power stroke is where the magic happens. At the top of the compression stroke, a spark plug ignites the compressed air-fuel mixture. This ignition creates a rapid expansion of gases, forcing the piston down the cylinder. This movement is what ultimately powers the vehicle. The energy produced during this stroke is what drives the crankshaft, converting linear motion into rotational motion, which then propels the vehicle forward.Finally, we have the exhaust stroke. After the power stroke, the piston moves back up the cylinder again, pushing the spent gases out of the combustion chamber and into the exhaust system. This process is essential for maintaining engine efficiency, as any leftover gases can hinder the intake of fresh air-fuel mixtures in the next cycle. Properly functioning exhaust systems are crucial for reducing emissions and improving overall engine performance.In summary, the four-cycle internal combustion engine operates through a series of well-coordinated strokes that maximize power and efficiency. Each stroke has its own unique function, contributing to the engine's ability to convert fuel into motion. Understanding this process is not only important for automotive enthusiasts but also for engineers who design and innovate new technologies. As we move towards a more sustainable future, the principles behind the four-cycle internal combustion engine will continue to play a significant role in the evolution of transportation technologies, even as we explore alternative energy sources. Therefore, grasping the mechanics of this engine type is essential for anyone looking to make a mark in the automotive industry or related fields.

四冲程内燃机是许多现代车辆中的基本组成部分，为汽车到摩托车等各种交通工具提供动力。理解这种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至关重要的。“四冲程”这个术语指的是发动机活塞在一个完整的工作循环中经历的四个不同的行程：进气、压缩、做功和排气。每一个行程在发动机的整体性能和效率中都起着至关重要的作用。在进气行程中，发动机吸入空气和燃料的混合物。当活塞向下移动时，气缸内形成真空，拉动空气-燃料混合物进入燃烧室。这个行程的效率至关重要，因为它为后续的过程奠定了基础。如果未能吸入正确数量的空气和燃料，发动机可能无法最佳运行，导致功率下降和排放增加。接下来是压缩行程。一旦活塞到达气缸底部，它便向上移动，压缩空气-燃料混合物。这个压缩过程至关重要，因为它提高了混合物的温度和压力，使其更容易燃烧。良好的压缩混合物确保在下一个阶段产生更强大的爆炸，即做功行程。压缩比，即活塞在底部时气缸的体积与在顶部时的体积之比，是决定发动机效率和功率输出的重要因素。做功行程是魔法发生的地方。在压缩行程的顶部，火花塞点燃压缩的空气-燃料混合物。这种点燃产生了快速扩张的气体，迫使活塞向下移动气缸。这一运动最终为车辆提供动力。此行程产生的能量驱动曲轴，将线性运动转化为旋转运动，从而推动车辆前进。最后，我们有排气行程。在做功行程之后，活塞再次向上移动气缸，将废气推出燃烧室并送入排气系统。这个过程对于保持发动机效率至关重要，因为任何残留的废气都会妨碍下一循环中新鲜空气-燃料混合物的吸入。正常运作的排气系统对减少排放和提高整体发动机性能至关重要。总之，四冲程内燃机通过一系列协调良好的行程运作，最大限度地提高功率和效率。每个行程都有其独特的功能，为发动机将燃料转化为运动的能力做出贡献。理解这一过程不仅对汽车爱好者很重要，而且对设计和创新新技术的工程师也至关重要。随着我们朝着更可持续的未来发展，四冲程内燃机背后的原理将在交通技术的演变中继续发挥重要作用，即使我们探索替代能源。因此，掌握这种发动机类型的机械原理对于任何希望在汽车行业或相关领域留下印记的人来说都是必不可少的。