valve lift

简明释义

阀升程

英英释义

例句

1.Racing engines often have a modified valve lift 阀门升程 for maximum performance on the track.

赛车发动机通常会修改valve lift 阀门升程以在赛道上获得最佳性能。

2.The engine's performance can be significantly improved by optimizing the valve lift 阀门升程 during high RPM.

通过优化高转速下的valve lift 阀门升程，可以显著提高发动机的性能。

3.Adjusting the valve lift 阀门升程 can lead to better fuel efficiency in modern vehicles.

调整valve lift 阀门升程可以提高现代车辆的燃油效率。

4.The mechanic explained that the valve lift 阀门升程 directly affects the engine's torque characteristics.

机械师解释说，valve lift 阀门升程直接影响发动机的扭矩特性。

5.A higher valve lift 阀门升程 allows more air into the combustion chamber, enhancing power output.

更高的valve lift 阀门升程允许更多空气进入燃烧室，从而增强功率输出。

作文

In the world of automotive engineering, one of the critical aspects that significantly influences an engine's performance is the concept of valve lift. This term refers to the distance a valve opens during the engine's operation, allowing air and fuel to enter the combustion chamber and exhaust gases to exit. The valve lift is a crucial parameter that directly affects the engine's efficiency, power output, and overall performance. Understanding how valve lift works can provide insights into the intricate dynamics of engine design and operation.When we talk about valve lift, we are essentially discussing the movement of the engine's intake and exhaust valves. These valves are opened and closed by camshafts, which are driven by the engine's crankshaft. The amount of lift generated by the camshaft determines how much air or fuel mixture can enter the cylinder and how effectively exhaust gases can be expelled. A higher valve lift typically allows for greater airflow, which can lead to increased power and performance.However, it is important to note that simply increasing the valve lift is not always the best solution. There are several factors to consider when optimizing valve lift for an engine. For instance, the duration of the valve opening (how long the valve stays open) also plays a significant role in engine performance. An optimal combination of valve lift and duration is essential for achieving the desired balance between power, efficiency, and emissions.Moreover, the type of engine also influences the ideal valve lift characteristics. For example, high-performance engines, such as those found in racing cars, often utilize aggressive valve lift profiles to maximize airflow and power output. In contrast, engines designed for fuel efficiency may employ more moderate valve lift to enhance combustion efficiency and reduce emissions.Additionally, the design of the intake and exhaust systems can affect how effective the valve lift is at improving engine performance. A well-designed intake manifold can help ensure that air flows smoothly into the cylinders, while an efficient exhaust system can facilitate quicker expulsion of exhaust gases. Together, these components work in harmony with the valve lift to optimize engine performance.Another aspect worth mentioning is the impact of technology on valve lift systems. Modern engines increasingly employ variable valve timing (VVT) technologies, which allow for adjustments in valve lift and timing based on engine speed and load conditions. This adaptability helps improve performance across various driving conditions, enhancing both power and fuel efficiency.In conclusion, valve lift is a fundamental concept in automotive engineering that plays a pivotal role in determining an engine's performance characteristics. By understanding how valve lift interacts with other engine components and design elements, engineers can create more efficient and powerful engines. Whether for racing or daily driving, the optimization of valve lift remains a critical focus in the pursuit of automotive excellence.

在汽车工程的世界中，一个显著影响发动机性能的关键因素是“阀门提升”（valve lift）的概念。这个术语指的是在发动机运行期间，阀门打开的距离，允许空气和燃料进入燃烧室，并使废气排出。“阀门提升”（valve lift）是一个至关重要的参数，直接影响发动机的效率、功率输出和整体性能。理解“阀门提升”（valve lift）的工作原理可以为我们提供关于发动机设计和运行复杂动态的见解。当我们谈论“阀门提升”（valve lift）时，我们实际上是在讨论发动机的进气阀和排气阀的运动。这些阀门由凸轮轴开启和关闭，凸轮轴由发动机的曲轴驱动。凸轮轴产生的提升量决定了有多少空气或燃料混合物可以进入气缸，以及废气可以多有效地被排出。更高的“阀门提升”（valve lift）通常允许更大的气流，这可以导致功率和性能的增加。然而，仅仅增加“阀门提升”（valve lift）并不总是最佳解决方案。在优化发动机的阀门提升时，有几个因素需要考虑。例如，阀门开启的持续时间（阀门保持开启的时间）也在发动机性能中发挥着重要作用。阀门提升（valve lift）和持续时间的最佳组合对于实现功率、效率和排放之间的理想平衡至关重要。此外，发动机类型也会影响理想的“阀门提升”（valve lift）特性。例如，高性能发动机，如赛车中的发动机，通常利用激进的阀门提升（valve lift）配置来最大化气流和功率输出。相比之下，旨在提高燃油效率的发动机可能采用更适中的阀门提升（valve lift），以增强燃烧效率并减少排放。此外，进气和排气系统的设计也会影响“阀门提升”（valve lift）在改善发动机性能方面的有效性。设计良好的进气歧管可以确保空气顺利流入气缸，而高效的排气系统可以加速废气的排出。所有这些组件与“阀门提升”（valve lift）共同协作，以优化发动机性能。另一个值得一提的方面是技术对“阀门提升”（valve lift）系统的影响。现代发动机越来越多地采用可变气门正时（VVT）技术，可以根据发动机转速和负载条件调整阀门提升（valve lift）和时机。这种适应性有助于在各种驾驶条件下改善性能，提高功率和燃油效率。总之，“阀门提升”（valve lift）是汽车工程中的一个基本概念，在决定发动机性能特征方面发挥着关键作用。通过理解“阀门提升”（valve lift）如何与其他发动机组件和设计元素相互作用，工程师可以创造出更高效和更强大的发动机。无论是用于赛车还是日常驾驶，阀门提升（valve lift）的优化仍然是追求汽车卓越的重要焦点。