camshafts

简明释义

英[ˈkæmʃɑːfts]美[ˈkæmˌʃæfts]

n. [机]凸轮轴（camshaft 的复数）

英英释义

单词用法

同义词

反义词

例句

1.Processing camshafts by the technique of high-speed-and-precision grinding can meet our satisfaction for high speed, efficiency and precision.

采用高速精密磨削方法和工艺加工凸轮轴可以满足高速、高效、高精度的加工要求。

2.The ignition pack consists of individual coils that are mounted directly onto the spark plugs and are housed in a 'cartridge' , located between the engine's camshafts.

点火包包含个人线圈，线圈被直接安装到火花塞和被放于墨盒里，位于发动机的凸轮轴之间。

3.Cylinder sleeves, camshafts and piston pins can be coated with the new method.

新涂层工艺适用于汽缸套，凸轮轴和活塞销。

4.Modern car engines that use rolling or sliding tappets for transmitting the rapid up-down lifting motion of the spinning camshafts-to open and close the engine's inlet and exhaust valves-seem immune.

使用滚柱挺杆或滑动挺杆来传动旋转凸轮轴做上下快速提升动作(开启和关闭发动机的进气阀和排气阀)的现代型汽车发动机似乎不会出现上述自动熄火的情况。

5.The sedan camshafts re-melting and chilling process and production technique of shell mold camshaft castings to be re-melted and chilled were introduced.

介绍重熔淬火硬化处理凸轮轴工艺，以及供重熔淬火用的壳型凸轮轴的生产工艺。

6.Some high-performance engines have two separate camshafts, one for each set of inlet and exhaust valves.

一些高性能发动机有两个单独的凸轮轴，分别负责开关进气门和排气门。

7.Distribution: two overhead camshafts, 16 valves.

分布：两个顶置凸轮轴，16气门。

8.The mechanic explained that the engine's performance heavily relies on the quality of its camshafts.

机械师解释说，发动机的性能在很大程度上依赖于其凸轮轴的质量。

9.Upgrading the camshafts can significantly improve the horsepower of your vehicle.

升级凸轮轴可以显著提高您车辆的马力。

10.Many high-performance cars use specially designed camshafts to enhance their efficiency.

许多高性能汽车使用特别设计的凸轮轴来提高其效率。

11.Regular maintenance of the camshafts is essential to prevent engine failure.

定期维护凸轮轴对于防止发动机故障至关重要。

12.The racing team invested in advanced camshafts to gain a competitive edge.

赛车队投资了先进的凸轮轴以获得竞争优势。

作文

The engine is often considered the heart of a vehicle, and within this complex system, various components work together to ensure optimal performance. One crucial element in the operation of an internal combustion engine is the camshafts, which play a vital role in controlling the timing and operation of the engine's valves. Understanding the function and importance of camshafts can provide insights into how engines operate and the advancements in automotive technology. At its core, a camshaft is a rotating shaft that has one or more cams attached to it. These cams are specially shaped pieces that push against the engine's valves, opening and closing them at precise intervals. The timing of these actions is essential for the engine to run smoothly and efficiently. If the camshafts are not functioning correctly, it can lead to poor engine performance, increased emissions, and even engine failure. There are typically two types of camshafts in modern engines: the overhead camshaft (OHC) and the overhead valve (OHV) configuration. In OHC engines, the camshafts are located above the engine's cylinders, allowing for a more direct connection to the valves. This design reduces the number of moving parts, leading to a lighter and more efficient engine. On the other hand, OHV engines have their camshafts located in the engine block, which requires pushrods to transfer motion to the valves. While OHV designs can be more compact, they often have more complexity due to the additional components. The material used for manufacturing camshafts is also significant, as it must withstand high levels of stress and heat. Most camshafts are made from cast iron or steel, providing the necessary durability and strength. However, advancements in materials science have led to the development of lightweight alloys and composite materials, which can improve performance and fuel efficiency. In recent years, the automotive industry has seen a trend towards variable valve timing (VVT) systems, which adjust the timing of the camshafts based on engine speed and load. This technology allows for better performance across a wider range of driving conditions. With VVT, the engine can optimize power output while maintaining fuel efficiency, making it an attractive option for manufacturers and consumers alike. In conclusion, the camshafts are integral components of an engine that significantly influence its performance and efficiency. Understanding their function and the advancements in technology surrounding them can help car enthusiasts and everyday drivers appreciate the intricate mechanics behind modern vehicles. As automotive technology continues to evolve, the role of camshafts will undoubtedly remain crucial in the quest for higher performance and lower emissions. Whether you are a mechanic, an engineer, or just a curious car owner, knowing about camshafts enhances your understanding of how vehicles operate and the innovations that shape the future of transportation.

发动机通常被认为是车辆的心脏，在这个复杂的系统中，各个组件共同工作，以确保最佳性能。在内燃机的运行中，一个至关重要的元素是凸轮轴，它在控制发动机阀门的时机和操作方面发挥着重要作用。理解凸轮轴的功能和重要性可以提供对发动机如何运作以及汽车技术进步的深入了解。 从根本上说，凸轮轴是一个旋转的轴，上面附有一个或多个凸轮。这些凸轮是特殊形状的部件，可以推动发动机的阀门，在精确的间隔内打开和关闭它们。这些动作的时机对于发动机的平稳和高效运行至关重要。如果凸轮轴未能正常工作，可能会导致发动机性能不佳、排放增加，甚至发动机故障。 现代发动机通常有两种类型的凸轮轴：顶置凸轮轴（OHC）和顶置阀（OHV）配置。在OHC发动机中，凸轮轴位于发动机气缸上方，允许与阀门之间有更直接的连接。这种设计减少了运动部件的数量，从而使发动机更轻、更高效。另一方面，OHV发动机的凸轮轴位于发动机块中，这需要推杆将运动传递给阀门。虽然OHV设计可能更紧凑，但由于额外部件的存在，通常会更加复杂。 制造凸轮轴所用的材料也很重要，因为它必须承受高水平的压力和热量。大多数凸轮轴由铸铁或钢制成，提供必要的耐用性和强度。然而，材料科学的进步导致轻质合金和复合材料的发展，这可以提高性能和燃油效率。 近年来，汽车行业出现了可变气门正时（VVT）系统的趋势，该系统根据发动机转速和负载调整凸轮轴的时机。这项技术使得发动机能够在更广泛的驾驶条件下优化功率输出，同时保持燃油效率，使其成为制造商和消费者都青睐的选择。 总之，凸轮轴是发动机的重要组成部分，对其性能和效率有显著影响。理解它们的功能以及围绕它们的技术进步可以帮助汽车爱好者和普通驾驶者欣赏现代车辆背后的复杂机制。随着汽车技术的不断发展，凸轮轴的作用无疑将在追求更高性能和更低排放的过程中继续发挥关键作用。无论你是机械师、工程师还是只是一个好奇的车主，了解凸轮轴都能增强你对车辆运作方式及塑造交通未来的创新的理解。