cylinder mean pressure

简明释义

气缸平均压力

英英释义

例句

1.A higher cylinder mean pressure often results in increased power output from the engine.

更高的气缸平均压力通常会导致发动机功率输出增加。

2.The engine's performance can be evaluated by measuring the cylinder mean pressure, which indicates the average pressure in the combustion chamber.

通过测量气缸平均压力，可以评估发动机的性能，这表明燃烧室内的平均压力。

3.During the test, we recorded the cylinder mean pressure at various RPMs to analyze engine efficiency.

在测试过程中，我们在不同转速下记录了气缸平均压力以分析发动机效率。

4.Engine knock can occur if the cylinder mean pressure exceeds safe limits.

如果气缸平均压力超过安全限制，可能会发生发动机敲击。

5.To optimize fuel combustion, engineers monitor the cylinder mean pressure closely.

为了优化燃料燃烧，工程师密切监测气缸平均压力。

作文

In the field of thermodynamics and engine design, the term cylinder mean pressure plays a crucial role in understanding the performance and efficiency of internal combustion engines. The cylinder mean pressure refers to the average pressure exerted on the piston within the cylinder during the power stroke of the engine cycle. This parameter is vital because it directly influences the engine's output power and torque characteristics.To elaborate, the engine operates through a series of cycles, typically known as the Otto or Diesel cycles, depending on the type of fuel used and the ignition method. During these cycles, fuel-air mixtures are compressed within the cylinder, and upon ignition, they expand rapidly, pushing the piston downwards. The pressure generated during this process is not constant; it fluctuates due to various factors such as combustion efficiency, engine speed, and load conditions. Therefore, the cylinder mean pressure serves as an important averaged value that helps engineers gauge the overall performance of the engine.The significance of cylinder mean pressure cannot be overstated. It is instrumental in determining the thermal efficiency of an engine. Higher mean pressures generally lead to better thermal efficiency, as they indicate that more energy is being extracted from the fuel. However, achieving high cylinder mean pressure requires careful tuning of the engine parameters, including compression ratio, fuel type, and ignition timing. Too high a pressure can lead to engine knocking, which can cause severe damage to engine components and reduce overall efficiency.Moreover, the cylinder mean pressure is also a critical factor in emissions control. Modern engines are designed with stricter emission regulations in mind, and maintaining optimal cylinder mean pressure can help minimize harmful exhaust gases. By optimizing the combustion process and ensuring that the fuel burns efficiently, engineers can reduce the formation of nitrogen oxides (NOx) and particulate matter, which are significant contributors to air pollution.In practical applications, measuring cylinder mean pressure can be done using various methods, such as pressure transducers or piezoelectric sensors. These devices provide real-time data that can be analyzed to assess engine performance and make necessary adjustments. For instance, if the cylinder mean pressure is found to be lower than expected, it may indicate issues such as incomplete combustion or valve leakage, prompting further investigation and corrective measures.In conclusion, the concept of cylinder mean pressure is integral to the study and optimization of internal combustion engines. It encompasses the average pressure experienced by the piston during the power stroke, serving as a key indicator of engine performance, thermal efficiency, and emissions control. As technology evolves and the demand for more efficient and cleaner engines increases, understanding and managing cylinder mean pressure will remain a fundamental aspect of engine design and engineering. By focusing on this parameter, engineers can enhance engine performance while meeting environmental standards, ultimately contributing to a more sustainable future for transportation technology.

在热力学和发动机设计领域，术语缸均压在理解内燃机的性能和效率方面起着至关重要的作用。缸均压是指在发动机循环的动力冲程中施加在气缸内活塞上的平均压力。这个参数至关重要，因为它直接影响发动机的输出功率和扭矩特性。进一步阐述，发动机通过一系列循环工作，通常称为奥托循环或柴油循环，这取决于所使用的燃料类型和点火方式。在这些循环中，燃油-空气混合物在气缸内被压缩，点火后迅速膨胀，推动活塞向下移动。在此过程中产生的压力并不恒定；由于燃烧效率、发动机转速和负载条件等各种因素，它会波动。因此，缸均压作为一个重要的平均值，帮助工程师评估发动机的整体性能。缸均压的重要性不容小觑。它在确定发动机的热效率方面至关重要。较高的均压通常意味着更好的热效率，因为它表明从燃料中提取了更多的能量。然而，实现高缸均压需要仔细调整发动机参数，包括压缩比、燃料类型和点火时机。过高的压力可能导致发动机敲击，这会对发动机组件造成严重损害并降低整体效率。此外，缸均压也是排放控制的关键因素。现代发动机的设计考虑了更严格的排放法规，保持最佳的缸均压可以帮助减少有害的废气。通过优化燃烧过程，确保燃料有效燃烧，工程师可以减少氮氧化物（NOx）和颗粒物的形成，这些都是空气污染的重要来源。在实际应用中，可以使用多种方法测量缸均压，例如压力传感器或压电传感器。这些设备提供实时数据，可以分析以评估发动机性能并进行必要的调整。例如，如果发现缸均压低于预期，可能表明存在未完全燃烧或气门泄漏等问题，从而促使进一步调查和纠正措施。总之，缸均压的概念对于内燃机的研究和优化至关重要。它涵盖了在动力冲程期间活塞所经历的平均压力，是发动机性能、热效率和排放控制的重要指标。随着技术的发展和对更高效、更清洁发动机需求的增加，理解和管理缸均压将始终是发动机设计和工程的基本方面。通过关注这一参数，工程师可以提高发动机性能，同时满足环境标准，最终为交通技术的可持续未来做出贡献。