actual compression ratio

简明释义

实际压缩比

英英释义

例句

1.A lower actual compression ratio 实际压缩比 can lead to increased emissions in some engines.

较低的实际压缩比可能导致某些发动机排放增加。

2.The engine's performance can be significantly improved by optimizing the actual compression ratio 实际压缩比.

通过优化实际压缩比，可以显著提高发动机的性能。

3.Engineers often calculate the actual compression ratio 实际压缩比 to ensure optimal combustion.

工程师们通常计算实际压缩比以确保最佳燃烧效果。

4.The actual compression ratio 实际压缩比 of this diesel engine is higher than that of a gasoline engine.

这款柴油发动机的实际压缩比高于汽油发动机。

5.To achieve better fuel efficiency, we must monitor the actual compression ratio 实际压缩比 during operation.

为了实现更好的燃油效率，我们必须在运行过程中监测实际压缩比。

作文

In the world of engineering and automotive design, the term actual compression ratio is crucial for understanding the performance of internal combustion engines. The actual compression ratio refers to the ratio of the volume of the combustion chamber when the piston is at the bottom of its stroke (BDC) to the volume of the combustion chamber when the piston is at the top of its stroke (TDC). This measurement is vital because it directly influences the engine's efficiency and power output. A higher actual compression ratio typically means that the engine can extract more energy from the fuel, resulting in better fuel economy and increased horsepower.To grasp the significance of the actual compression ratio, one must first understand the theoretical compression ratio. The theoretical compression ratio is calculated based on the geometric dimensions of the engine's cylinders. However, this value does not always represent the real-world performance of the engine due to various factors such as combustion chamber design, valve timing, and the properties of the fuel being used. Therefore, the actual compression ratio provides a more accurate representation of an engine's operational characteristics.For instance, consider two engines with the same theoretical compression ratio. If one engine has a well-designed combustion chamber that promotes efficient mixing of air and fuel while the other has a poorly designed chamber, the actual compression ratio of the first engine may be significantly higher than that of the second. This difference can lead to substantial variations in performance, even though the theoretical ratios appear identical.Moreover, the actual compression ratio can be affected by external factors such as altitude and temperature. At higher altitudes, the air density decreases, which can reduce the amount of oxygen available for combustion. As a result, the engine may not achieve its intended actual compression ratio, leading to a decrease in power and efficiency. Similarly, extreme temperatures can impact fuel properties, further influencing the actual compression ratio and overall engine performance.In practical applications, engineers often strive to optimize the actual compression ratio to maximize engine performance while minimizing emissions. This optimization process involves a careful balance between various design elements, including cylinder head shape, piston design, and fuel delivery systems. By fine-tuning these components, engineers can achieve an ideal actual compression ratio that enhances the engine’s capabilities.In conclusion, the actual compression ratio is a fundamental concept in engine design that plays a significant role in determining an engine's efficiency and power output. Understanding the differences between the theoretical and actual compression ratios allows engineers to make informed decisions about engine design and performance tuning. As technology continues to advance, the ability to accurately measure and manipulate the actual compression ratio will remain pivotal in the development of more efficient and powerful engines. This knowledge not only benefits automotive manufacturers but also leads to improved fuel economy and reduced environmental impact for consumers worldwide.

在工程和汽车设计的领域中，术语实际压缩比对于理解内燃机的性能至关重要。实际压缩比是指当活塞处于行程底部（BDC）时，燃烧室的体积与当活塞处于行程顶部（TDC）时燃烧室的体积之间的比率。这个测量值至关重要，因为它直接影响发动机的效率和功率输出。较高的实际压缩比通常意味着发动机可以从燃料中提取更多的能量，从而导致更好的燃油经济性和增加的马力。要理解实际压缩比的重要性，首先必须了解理论压缩比。理论压缩比是根据发动机气缸的几何尺寸计算得出的。然而，由于燃烧室设计、阀门定时和所用燃料的性质等各种因素，这个值并不总能代表发动机的实际性能。因此，实际压缩比提供了更准确的发动机操作特性的表现。例如，考虑两个具有相同理论压缩比的发动机。如果一个发动机有一个设计良好的燃烧室，促进空气和燃料的有效混合，而另一个则有一个设计不良的燃烧室，那么第一个发动机的实际压缩比可能会显著高于第二个。这种差异可能导致性能的重大变化，即使理论比率看起来相同。此外，实际压缩比还可以受到外部因素的影响，例如海拔和温度。在较高的海拔，空气密度降低，这可能减少可用于燃烧的氧气量。因此，发动机可能无法达到其预期的实际压缩比，导致功率和效率的下降。同样，极端温度也会影响燃料特性，进一步影响实际压缩比和整体发动机性能。在实际应用中，工程师通常努力优化实际压缩比，以最大化发动机性能，同时最小化排放。这个优化过程涉及对各种设计元素的精心平衡，包括气缸头形状、活塞设计和燃料供给系统。通过微调这些组件，工程师可以实现理想的实际压缩比，增强发动机的能力。总之，实际压缩比是发动机设计中的一个基本概念，在决定发动机的效率和功率输出方面发挥着重要作用。理解理论压缩比与实际压缩比之间的差异使工程师能够对发动机设计和性能调优做出明智的决策。随着技术的不断进步，准确测量和操控实际压缩比的能力将继续在开发更高效、更强大的发动机中发挥关键作用。这一知识不仅使汽车制造商受益，还为全球消费者带来了更好的燃油经济性和减少环境影响。