cam shaft

简明释义

凸轮轴;

英英释义

例句

1.A worn cam shaft can lead to poor engine performance.

磨损的凸轮轴可能导致发动机性能下降。

2.The timing of the cam shaft is crucial for optimal engine operation.

对于最佳发动机运作，凸轮轴的时机至关重要。

3.He replaced the broken cam shaft with a new one during the engine rebuild.

在发动机重建过程中，他用新的凸轮轴替换了损坏的部分。

4.Regular maintenance can help prolong the life of the cam shaft.

定期维护可以帮助延长凸轮轴的使用寿命。

5.The mechanic inspected the cam shaft to ensure it was functioning properly.

机械师检查了凸轮轴以确保其正常运作。

作文

The engine is often regarded as the heart of a vehicle, and within this intricate system, one of the most crucial components is the cam shaft. The cam shaft plays a vital role in regulating the timing of the engine's valves, ensuring that they open and close at the correct intervals during the engine's cycle. This component is typically made of high-strength materials to withstand the intense pressures and temperatures generated within the engine. The operation of the cam shaft is closely linked to the overall efficiency and performance of an engine. When the engine is running, the cam shaft rotates, driven by the crankshaft, which is connected to the pistons. As the cam shaft turns, its lobes push against the valve lifters, causing the valves to open and close. This process is essential for allowing air and fuel to enter the combustion chamber and for expelling exhaust gases after combustion. One interesting aspect of the cam shaft is its design variation across different types of engines. For instance, some engines utilize a single cam shaft (SOHC), while others may employ dual cam shafts (DOHC) to enhance performance. The dual setup allows for more precise control over the intake and exhaust valves, which can significantly improve engine efficiency and power output. Moreover, advancements in technology have led to innovations such as variable valve timing systems, which adjust the timing of the cam shaft to optimize performance across various engine speeds. This technology enables engines to deliver better fuel economy and reduced emissions while maintaining power. In terms of maintenance, the cam shaft must be regularly inspected for wear and tear, as any damage could lead to catastrophic engine failure. Signs of a failing cam shaft may include unusual noises, decreased engine performance, or warning lights on the dashboard. Mechanics often recommend replacing timing belts or chains that drive the cam shaft at regular intervals to prevent potential issues. In conclusion, the cam shaft is an indispensable part of an engine's operation, influencing its performance, efficiency, and longevity. Understanding how the cam shaft functions within the broader context of the engine can help car owners appreciate the complexity of their vehicles. Regular maintenance and awareness of the cam shaft can contribute significantly to the overall health of an engine, making it a topic worth exploring for anyone interested in automotive mechanics.

发动机常被视为车辆的心脏，而在这个复杂的系统中，最重要的组成部分之一就是凸轮轴。凸轮轴在调节发动机气门的时机方面发挥着至关重要的作用，确保它们在发动机循环过程中以正确的间隔打开和关闭。这个组件通常由高强度材料制成，以承受发动机内部产生的巨大压力和温度。凸轮轴的运作与发动机的整体效率和性能密切相关。当发动机运转时，凸轮轴旋转，由曲轴驱动，曲轴与活塞连接。当凸轮轴转动时，它的凸轮推动阀杆，使气门打开和关闭。这个过程对于让空气和燃料进入燃烧室以及在燃烧后排出废气至关重要。一个有趣的方面是，不同类型的发动机在凸轮轴的设计上存在差异。例如，一些发动机使用单个凸轮轴（SOHC），而其他发动机可能采用双凸轮轴（DOHC）以增强性能。双重设置允许更精确地控制进气和排气气门，这可以显著提高发动机的效率和功率输出。此外，技术的进步导致了可变气门正时系统等创新，这种系统可以调整凸轮轴的时机，以优化各种发动机转速下的性能。这项技术使发动机能够在保持动力的同时提供更好的燃油经济性和减少排放。在维护方面，凸轮轴必须定期检查磨损情况，因为任何损坏都可能导致灾难性的发动机故障。凸轮轴故障的迹象可能包括异常噪音、发动机性能下降或仪表盘上的警告灯。机械师通常建议定期更换驱动凸轮轴的时序皮带或链条，以防止潜在问题。总之，凸轮轴是发动机运行中不可或缺的一部分，影响其性能、效率和寿命。了解凸轮轴在发动机更广泛背景下的功能，可以帮助车主欣赏他们车辆的复杂性。定期维护和对凸轮轴的关注可以显著促进发动机的整体健康，使其成为任何对汽车机械感兴趣的人值得探索的话题。