camshaft

简明释义

英[ˈkæmʃɑːft]美[ˈkæmʃæft]

n. [机] 凸轮轴

复 数 c a m s h a f t s

英英释义

单词用法

同义词

反义词

例句

1.A system of automated NC camshaft grinding machine with moderate price and high capability was developed.

为此，开发了一套价格适中的高性能数控凸轮磨床控制系统。

2.Other possible reasons include problems with the oil pump, rod and main bearing clearances, camshaft stopping playing, or cam bearings and lifters.

其他可能的原因包括油泵问题、杆和主轴承的空隙、凸轮轴停止工作、或者凸轮的方位和升降。

3.Applied to ductile iron crankshaft, camshaft and other parts of the grinding and other grinding.

适用于球墨铸铁曲轴，凸轮轴等工件的磨削及其它磨削。

4.The camshaft also fits inside the block, except on overhead-cam engines (OHC).

除了顶置凸轮（OHC）发动机以外，凸轮轴都安装在气缸体里面。

5.When you increase the RPM, however, this configuration for the camshaft does not work well.

当您增加转速时，但这种配置的凸轮轴不工作。

6.The isothermal quenching process of the ductile iron camshaft was analyzed.

对球铁凸轮轴的等温淬火工艺进行了分析。

7.The mechanic explained that the camshaft 凸轮轴 is crucial for controlling the timing of the engine's valves.

机械师解释说，凸轮轴 camshaft 对于控制发动机阀门的时机至关重要。

8.When rebuilding the engine, it's important to check the camshaft 凸轮轴 for wear and tear.

在重建发动机时，检查凸轮轴 camshaft 的磨损情况非常重要。

9.A performance upgrade often includes a new camshaft 凸轮轴 to improve horsepower.

性能升级通常包括更换新的凸轮轴 camshaft 以提高马力。

10.If the camshaft 凸轮轴 is misaligned, it can cause serious engine problems.

如果凸轮轴 camshaft 对齐不当，可能会导致严重的发动机问题。

11.The sound of the engine changed when the camshaft 凸轮轴 was replaced with a high-performance one.

当用高性能的凸轮轴 camshaft 替换后，发动机的声音发生了变化。

作文

The engine is often referred to as the heart of a vehicle, and one of the critical components that contribute to its functionality is the camshaft. The camshaft plays a vital role in controlling the timing of the engine's valves, which are essential for the intake of air and fuel and the exhaust of combustion gases. Understanding how a camshaft operates can provide valuable insights into the performance and efficiency of an engine. A camshaft is a rotating shaft that has several cam lobes attached to it. These lobes are shaped in a specific way to push against the engine's valves at precise intervals, allowing them to open and close at the right times during the four-stroke cycle of an internal combustion engine. This cycle includes the intake, compression, power, and exhaust strokes. The correct timing of these strokes is crucial; if the valves do not open and close at the right moments, the engine will not function efficiently. There are different types of camshafts, including overhead camshafts (OHC) and overhead valve (OHV) camshafts. OHC designs place the camshaft above the engine's cylinder head, directly operating the valves. This design allows for more precise control of valve timing and can improve performance. On the other hand, OHV designs have the camshaft located in the engine block, using pushrods to operate the valves. Each design has its advantages and disadvantages, impacting factors such as engine weight, complexity, and maintenance. Another aspect of the camshaft that is worth noting is its impact on the engine's performance characteristics. The shape and size of the cam lobes can significantly affect how the engine behaves at different RPMs (revolutions per minute). For example, a camshaft with aggressive lobes may provide better performance at higher RPMs, making it ideal for racing applications. Conversely, a milder camshaft might enhance low-end torque, making it more suitable for everyday driving conditions. In modern vehicles, the technology surrounding camshafts has evolved significantly. Many manufacturers now use variable valve timing (VVT) systems, which adjust the position of the camshaft based on engine speed and load. This technology allows for improved fuel efficiency and reduced emissions while maintaining optimal performance across a range of driving conditions. VVT systems can change the timing of the valves, allowing for better airflow and combustion efficiency, which is crucial in today’s environmentally conscious automotive market. In conclusion, the camshaft is an essential component of an internal combustion engine that significantly influences its performance and efficiency. By controlling the timing of the engine's valves, the camshaft ensures that the engine operates smoothly and effectively. With advancements in technology, the design and functionality of camshafts continue to evolve, making them a focal point for engineers aiming to improve engine performance and meet stringent emissions regulations. Understanding the role of the camshaft helps car enthusiasts and professionals alike appreciate the intricate mechanics behind the vehicles we drive every day.

发动机通常被称为车辆的心脏，而其中一个关键部件是凸轮轴。凸轮轴在控制发动机气门的时机方面起着重要作用，这对于空气和燃料的吸入以及燃烧气体的排放至关重要。了解凸轮轴的工作原理可以为我们提供有关发动机性能和效率的宝贵见解。 凸轮轴是一个旋转的轴，上面附有几个凸轮。 这些凸轮的形状经过精心设计，以便在精确的间隔内推动发动机的气门，使其在内燃机的四冲程循环中以正确的时间打开和关闭。 这个循环包括进气、压缩、动力和排气冲程。 这些冲程的正确时机至关重要；如果气门没有在正确的时刻打开和关闭，发动机将无法高效运行。 有不同类型的凸轮轴，包括顶置凸轮轴（OHC）和顶置气门（OHV）凸轮轴。 OHC设计将凸轮轴放在发动机气缸头上，直接操作气门。 这种设计允许对气门时机进行更精确的控制，并可以提高性能。 另一方面，OHV设计则将凸轮轴放置在发动机缸体中，使用推杆来操作气门。 每种设计都有其优缺点，影响发动机的重量、复杂性和维护。 值得注意的另一个关于凸轮轴的方面是它对发动机性能特征的影响。 凸轮的形状和大小会显著影响发动机在不同转速（RPM）下的表现。 例如，带有激进凸轮的凸轮轴可能在高转速时提供更好的性能，使其非常适合赛车应用。 相反，温和的凸轮轴可能增强低转速扭矩，使其更适合日常驾驶条件。 在现代车辆中，围绕凸轮轴的技术已经显著发展。 许多制造商现在使用可变气门正时（VVT）系统，根据发动机速度和负载调整凸轮轴的位置。 这种技术能够提高燃油效率并减少排放，同时在各种驾驶条件下保持最佳性能。 VVT系统可以改变气门的时机，从而改善气流和燃烧效率，这在当今环保意识日益增强的汽车市场中至关重要。 总之，凸轮轴是内燃机的一个重要组成部分，显著影响其性能和效率。 通过控制发动机气门的时机，凸轮轴确保发动机平稳有效地运行。 随着技术的进步，凸轮轴的设计和功能不断演变，使其成为工程师改善发动机性能和满足严格排放法规的焦点。 理解凸轮轴的作用有助于汽车爱好者和专业人士欣赏我们每天驾驶的车辆背后的复杂机械结构。