expansion stroke

简明释义

膨胀行程

英英释义

例句

1.Understanding the expansion stroke helps mechanics troubleshoot engine issues effectively.

理解膨胀冲程有助于机械师有效排查发动机问题。

2.Engine designers focus on optimizing the expansion stroke to improve performance.

发动机设计师专注于优化膨胀冲程以提高性能。

3.The efficiency of a steam engine relies heavily on the timing of the expansion stroke.

蒸汽机的效率在很大程度上依赖于膨胀冲程的时机。

4.In a four-stroke engine, the expansion stroke is crucial for converting fuel energy into mechanical work.

在四冲程发动机中，膨胀冲程对将燃料能量转化为机械功至关重要。

5.During the engine's expansion stroke, the piston moves down, increasing the volume inside the cylinder.

在发动机的膨胀冲程中，活塞向下移动，增大了气缸内的容积。

作文

The concept of the expansion stroke is crucial in understanding how various engines and mechanical systems operate. In simple terms, the expansion stroke refers to the phase in an engine cycle where the working fluid—typically a gas—expands, leading to a decrease in pressure and an increase in volume. This process is essential for converting thermal energy into mechanical work. To illustrate, let’s consider a typical four-stroke internal combustion engine. The cycle includes four distinct phases: intake, compression, power, and exhaust. During the power stroke, fuel is ignited, causing a rapid increase in temperature and pressure. Following this, the expansion stroke occurs as the gases produced from combustion push the piston down, thus converting the energy released during combustion into mechanical motion. This is the moment when the engine generates power to propel a vehicle forward.In addition to internal combustion engines, the expansion stroke is also present in other types of engines, such as steam engines and gas turbines. In a steam engine, for example, steam enters the cylinder and expands, pushing the piston. This expansion is what drives the mechanical parts of the engine, allowing it to perform work. Similarly, in gas turbines, the expansion stroke plays a vital role in the conversion of gas energy into rotational energy, which ultimately powers aircraft and other machinery.Understanding the expansion stroke is not just important for engineers and mechanics; it also has implications for efficiency and performance. The effectiveness of the expansion stroke can significantly impact an engine's overall efficiency. Engineers continuously strive to optimize this phase to improve fuel consumption and reduce emissions. Innovations such as turbocharging and variable valve timing are designed to enhance the expansion stroke, allowing for better engine performance under various conditions.Moreover, the principles behind the expansion stroke extend beyond traditional engines. In renewable energy technologies, such as compressed air energy storage systems, the concept of expansion is leveraged to store and release energy. When air is compressed, it heats up; when it is allowed to expand, it cools and can be used to drive turbines or generators. This innovative application showcases the versatility of the expansion stroke in modern technology.In conclusion, the expansion stroke is a fundamental aspect of many mechanical systems, particularly in engines. It represents a critical phase where energy conversion takes place, enabling machines to perform work efficiently. As technology advances, understanding and optimizing the expansion stroke will continue to be vital in enhancing performance and sustainability in various engineering fields. Knowledge of this concept is not only beneficial for those directly involved in engine design but also for anyone interested in the principles of energy conversion and mechanical efficiency.

“膨胀冲程”的概念对于理解各种发动机和机械系统的工作原理至关重要。简单来说，膨胀冲程是指发动机循环中工作流体（通常是气体）膨胀的阶段，这一过程导致压力降低和体积增加。这个过程对于将热能转化为机械功是至关重要的。为了说明这一点，让我们考虑一个典型的四冲程内燃机。该循环包括四个不同的阶段：进气、压缩、动力和排气。在动力冲程期间，燃料被点燃，导致温度和压力迅速上升。随后，膨胀冲程发生，燃烧产生的气体推动活塞向下，从而将燃烧释放的能量转化为机械运动。这是发动机产生动力以推动车辆前进的时刻。除了内燃机，膨胀冲程也存在于其他类型的发动机中，例如蒸汽机和燃气涡轮。在蒸汽机中，例如，蒸汽进入气缸并膨胀，推动活塞。这种膨胀驱动了发动机的机械部分，使其能够执行工作。同样，在燃气涡轮中，膨胀冲程在将气体能量转化为旋转能量方面发挥着至关重要的作用，最终为飞机和其他机器提供动力。理解膨胀冲程不仅对工程师和机械师重要；它还对效率和性能有影响。膨胀冲程的有效性会显著影响发动机的整体效率。工程师们不断努力优化这一阶段，以提高燃油消耗率并减少排放。涡轮增压和可变气门正时等创新旨在增强膨胀冲程，使发动机在各种条件下表现更好。此外，膨胀冲程背后的原理超越了传统的发动机。在可再生能源技术中，例如压缩空气储能系统，利用膨胀的概念来存储和释放能量。当空气被压缩时，它会升温；当它被允许膨胀时，它会降温，可以用于驱动涡轮或发电机。这一创新应用展示了膨胀冲程在现代技术中的多样性。总之，膨胀冲程是许多机械系统的基本方面，尤其是在发动机中。它代表一个关键阶段，在此阶段能量转换发生，使机器能够高效地执行工作。随着技术的进步，理解和优化膨胀冲程将继续在提高各个工程领域的性能和可持续性方面发挥重要作用。掌握这一概念不仅对直接参与发动机设计的人有益，也对任何对能量转换和机械效率原理感兴趣的人有益。