brake thermal efficiency

简明释义

实际热效率;

英英释义

例句

1.The research focused on enhancing the brake thermal efficiency 制动热效率 of diesel engines.

研究集中在提高柴油发动机的brake thermal efficiency 制动热效率上。

2.Improving the brake thermal efficiency 制动热效率 of a vehicle can lead to better fuel economy.

提高车辆的brake thermal efficiency 制动热效率可以带来更好的燃油经济性。

3.Engine designers aim to maximize brake thermal efficiency 制动热效率 to enhance overall vehicle performance.

发动机设计师旨在最大化brake thermal efficiency 制动热效率以提升整体车辆性能。

4.A higher brake thermal efficiency 制动热效率 indicates that more of the fuel's energy is converted into useful work.

更高的brake thermal efficiency 制动热效率表明更多的燃料能量被转化为有用的工作。

5.The engine's brake thermal efficiency 制动热效率 was measured to determine its performance under load.

发动机的brake thermal efficiency 制动热效率被测量以确定其在负载下的性能。

作文

Understanding the concept of brake thermal efficiency is crucial for anyone involved in the field of engineering, particularly in automotive and mechanical disciplines. This term refers to the effectiveness with which an engine converts the heat from fuel into useful work. In simpler terms, it measures how well an engine utilizes the energy produced during combustion to perform mechanical tasks. The higher the brake thermal efficiency, the more efficient the engine is at converting fuel into energy, which ultimately translates to better performance and lower fuel consumption.To grasp the importance of brake thermal efficiency, we must first understand the basic principles of thermodynamics that govern engine operation. When fuel combusts in an engine, it generates heat, which is then transformed into mechanical energy. However, not all the heat produced can be converted into work; some of it is inevitably lost to the environment through exhaust gases, coolant systems, and other means. The brake thermal efficiency quantifies this conversion process by comparing the useful work output to the total heat input from the fuel.Various factors influence the brake thermal efficiency of an engine, including its design, the type of fuel used, and operational conditions. For instance, modern engines often employ advanced technologies such as turbocharging, direct fuel injection, and variable valve timing to enhance their thermal efficiency. These innovations allow for more complete combustion of fuel and reduced energy losses, thereby improving the overall brake thermal efficiency.In addition to technological advancements, the choice of fuel can significantly impact an engine's brake thermal efficiency. Fuels with higher energy densities, such as diesel, tend to provide better thermal efficiency compared to gasoline. This is primarily due to the different combustion characteristics and energy content of these fuels. Consequently, understanding the relationship between fuel type and engine performance is essential for optimizing brake thermal efficiency.The implications of enhancing brake thermal efficiency extend beyond individual vehicle performance. On a larger scale, improved thermal efficiency contributes to reduced greenhouse gas emissions and lower fuel consumption, which are critical factors in addressing global climate change. As governments and organizations worldwide strive to meet stricter environmental regulations, the demand for more efficient engines will continue to grow.In conclusion, brake thermal efficiency serves as a vital metric in evaluating engine performance and efficiency. By understanding and improving this parameter, engineers and manufacturers can develop vehicles that not only perform better but also contribute to a more sustainable future. As technology continues to advance, the potential for achieving higher brake thermal efficiency will undoubtedly play a significant role in shaping the automotive industry and our approach to energy consumption.

理解制动热效率的概念对于任何参与工程领域的人，尤其是汽车和机械学科的人来说都是至关重要的。这个术语指的是发动机将燃料产生的热量转化为有用工作的有效性。简单来说，它衡量的是发动机利用燃烧过程中产生的能量来执行机械任务的能力。制动热效率越高，发动机在将燃料转化为能量方面就越有效，这最终转化为更好的性能和更低的燃料消耗。为了理解制动热效率的重要性，我们必须首先了解支配发动机运作的热力学基本原理。当燃料在发动机中燃烧时，会产生热量，然后转化为机械能。然而，并非所有产生的热量都能转化为工作；其中一部分不可避免地通过废气、冷却系统和其他方式损失到环境中。制动热效率通过将有用的工作输出与来自燃料的总热输入进行比较，量化这一转化过程。多种因素会影响发动机的制动热效率，包括其设计、使用的燃料类型和操作条件。例如，现代发动机通常采用先进技术，如涡轮增压、直接燃油喷射和可变气门正时，以提高其热效率。这些创新允许更完全的燃料燃烧和减少能量损失，从而改善整体制动热效率。除了技术进步外，燃料的选择也会显著影响发动机的制动热效率。具有较高能量密度的燃料，如柴油，相比于汽油，往往能提供更好的热效率。这主要是由于这些燃料的不同燃烧特性和能量含量。因此，理解燃料类型与发动机性能之间的关系对于优化制动热效率至关重要。提高制动热效率的影响超出了单个车辆的性能。在更大的范围内，热效率的提高有助于减少温室气体排放和降低燃料消耗，这些都是应对全球气候变化的关键因素。随着世界各国政府和组织努力满足更严格的环境法规，对更高效发动机的需求将继续增长。总之，制动热效率作为评估发动机性能和效率的重要指标。通过理解和改善这一参数，工程师和制造商可以开发出不仅性能更好，而且有助于更可持续未来的车辆。随着技术的不断进步，实现更高制动热效率的潜力无疑将在塑造汽车工业和我们对能源消费的方式中发挥重要作用。