four stroke cycle

简明释义

四冲程循环

英英释义

例句

1.In a four stroke cycle, the intake, compression, power, and exhaust strokes occur in that order.

在四冲程循环中，进气、压缩、动力和排气冲程按此顺序发生。

2.Most modern motorcycles use a four stroke cycle engine for better fuel efficiency.

大多数现代摩托车使用四冲程循环发动机以提高燃油效率。

3.The four stroke cycle allows for smoother operation compared to two-stroke engines.

与二冲程发动机相比，四冲程循环允许更平稳的运行。

4.The engine operates on a four stroke cycle, which means it completes a power cycle in four distinct strokes of the piston.

该发动机采用四冲程循环，这意味着它在活塞的四个不同冲程中完成一个动力循环。

5.Understanding the four stroke cycle is crucial for anyone studying automotive engineering.

理解四冲程循环对于任何学习汽车工程的人来说都是至关重要的。

作文

The four stroke cycle is an essential concept in the field of internal combustion engines, which has revolutionized the way we think about power generation and mechanical efficiency. This cycle consists of four distinct strokes: intake, compression, power, and exhaust. Each of these strokes plays a crucial role in converting fuel into energy that can be harnessed for various applications, from powering vehicles to generating electricity. Understanding the four stroke cycle not only helps in grasping the fundamentals of engine operation but also provides insights into advancements in automotive technology.The first stroke in the four stroke cycle is the intake stroke, where the engine draws in a mixture of air and fuel. As the piston moves down the cylinder, the intake valve opens, allowing the air-fuel mixture to enter. This process is vital as it sets the stage for the subsequent steps in the cycle. A well-executed intake stroke ensures that the engine has the right amount of fuel and air to produce optimal power.Next comes the compression stroke. During this phase, the piston moves back up the cylinder, compressing the air-fuel mixture. This compression is crucial because it increases the temperature and pressure of the mixture, making it more combustible. When the piston reaches the top of its stroke, the spark plug ignites the compressed mixture, leading to the power stroke. This ignition is what ultimately generates the force that drives the piston back down the cylinder, creating the power needed to turn the crankshaft and propel the vehicle.The third stroke, known as the power stroke, is where the engine produces its power. The rapid expansion of gases from the combustion pushes the piston down with great force. This is the moment when the engine converts the chemical energy stored in the fuel into mechanical energy. The efficiency of this stroke is critical for the overall performance of the engine, as it directly affects the output power and fuel economy.Finally, the exhaust stroke completes the four stroke cycle. After the power stroke, the piston moves back up the cylinder again, this time pushing out the spent gases through the open exhaust valve. This stroke is essential for clearing the combustion chamber of exhaust gases, making room for a new intake of air and fuel in the next cycle. An effective exhaust stroke ensures that the engine runs smoothly and efficiently, minimizing emissions and maximizing performance.In conclusion, the four stroke cycle is a fundamental principle that underpins the operation of most modern internal combustion engines. Each stroke plays a significant role in ensuring that the engine operates efficiently and effectively. As technology continues to advance, understanding the four stroke cycle remains crucial for engineers and automotive enthusiasts alike. Innovations in engine design often aim to improve the efficiency of this cycle, leading to better fuel economy and reduced environmental impact. By mastering the intricacies of the four stroke cycle, one can appreciate the remarkable engineering feats that have shaped the automotive industry and continue to drive its evolution.

四冲程循环是内燃机领域的一个基本概念，它彻底改变了我们对动力生成和机械效率的认识。这个循环由四个不同的冲程组成：进气、压缩、动力和排气。这些冲程在将燃料转化为可以用于各种应用的能量中发挥着至关重要的作用，从驱动车辆到发电。理解四冲程循环不仅有助于掌握发动机操作的基本原理，还为汽车技术的进步提供了深入的见解。四冲程循环中的第一个冲程是进气冲程，此时发动机吸入空气和燃料的混合物。当活塞向下移动气缸时，进气阀打开，允许空气-燃料混合物进入。这个过程至关重要，因为它为循环中的后续步骤奠定了基础。良好的进气冲程确保发动机拥有最佳的燃料和空气，以产生最佳的动力。接下来是压缩冲程。在这个阶段，活塞再次向上移动气缸，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，使其更易燃。当活塞到达冲程的顶端时，火花塞点燃压缩的混合物，从而引发动力冲程。正是这种点燃产生了推动活塞向下运动的力量，创造出驱动曲轴并推进车辆所需的动力。第三个冲程，称为动力冲程，是发动机产生动力的地方。燃烧气体的快速膨胀推动活塞以极大的力量向下移动。此时，发动机将燃料中储存的化学能转化为机械能。这个冲程的效率对于发动机的整体性能至关重要，因为它直接影响输出功率和燃油经济性。最后，排气冲程完成了四冲程循环。在动力冲程之后，活塞再次向上移动气缸，这次将废气通过打开的排气阀推出。这个冲程对于清除燃烧室中的废气至关重要，为下一个循环的新进气和燃料腾出空间。有效的排气冲程确保发动机平稳高效地运行，最大限度地减少排放并提高性能。总之，四冲程循环是大多数现代内燃机运作的基本原理。每一个冲程在确保发动机高效、有效运行方面都发挥着重要作用。随着技术的不断进步，理解四冲程循环仍然对工程师和汽车爱好者至关重要。发动机设计中的创新往往旨在提高这一循环的效率，从而改善燃油经济性并减少环境影响。通过掌握四冲程循环的复杂性，人们可以欣赏到塑造汽车工业并继续推动其发展的卓越工程成就。