valve guide

简明释义

阀导块

英英释义

例句

1.If the valve guide is too loose, it can cause excessive valve noise.

如果气门导向过松，可能会导致气门噪音过大。

2.The valve guide helps maintain proper alignment of the valve stem.

气门导向有助于保持气门杆的正确对齐。

3.A faulty valve guide can lead to oil leaks in the engine.

故障的气门导向可能导致发动机漏油。

4.The mechanic replaced the worn-out valve guide to improve engine performance.

机械师更换了磨损的气门导向以提高发动机性能。

5.When rebuilding the engine, it's crucial to check the valve guide for wear.

在重建发动机时，检查气门导向是否磨损至关重要。

作文

The engine of a vehicle is an intricate system that relies on numerous components working together seamlessly. One critical component in this system is the valve guide, which plays a vital role in the overall performance and efficiency of the engine. Understanding what a valve guide is and how it functions can provide valuable insights into engine mechanics and maintenance. A valve guide is a cylindrical component located within the cylinder head of an engine. Its primary function is to support the valve stem, allowing the valve to open and close smoothly while maintaining proper alignment. The valve guide ensures that the valve operates efficiently, minimizing wear and tear on both the valve and the seat where it closes. This alignment is crucial because any misalignment can lead to improper sealing, resulting in loss of compression and reduced engine performance. The material used for valve guides is typically chosen based on its ability to withstand high temperatures and pressures. Common materials include bronze, cast iron, and sometimes even more advanced composites. Each material has its advantages and disadvantages, affecting factors such as durability, thermal conductivity, and friction characteristics. For instance, bronze valve guides are known for their excellent wear resistance, making them suitable for high-performance engines. Regular maintenance of the valve guide is essential for optimal engine performance. Over time, due to constant movement and exposure to heat, valve guides can wear out or become damaged. Signs of a failing valve guide include increased oil consumption, blue smoke from the exhaust, and a noticeable drop in engine power. Mechanics often recommend checking the condition of the valve guides during routine engine inspections, especially in older vehicles or those that have been subjected to heavy use. In addition to regular checks, understanding how to replace a worn valve guide can be beneficial for car enthusiasts and mechanics alike. The process typically involves removing the cylinder head from the engine block, extracting the old valve guides, and installing new ones with precision. This task requires specific tools and expertise, as improper installation can lead to further complications down the line. In conclusion, the valve guide is a small yet indispensable part of an engine's functionality. Its role in supporting the valve stems and ensuring proper alignment cannot be overstated. By maintaining the valve guides and addressing any issues promptly, vehicle owners can enhance their engine's performance and longevity. Understanding the significance of the valve guide not only helps in appreciating the complexity of automotive engineering but also underscores the importance of regular maintenance for optimal vehicle operation.

发动机是一个复杂的系统，依赖于众多组件的无缝协作。其中一个关键组件是气门导管，它在发动机的整体性能和效率中发挥着至关重要的作用。了解气门导管是什么以及它的功能，可以为我们提供关于发动机机械和维护的宝贵见解。气门导管是位于发动机气缸盖内的一个圆柱形部件。它的主要功能是支撑气门杆，使气门能够顺畅地打开和关闭，同时保持适当的对齐。气门导管确保气门高效运行，最大限度地减少气门和气门座之间的磨损。这种对齐至关重要，因为任何不对齐都可能导致密封不良，从而导致压缩损失和发动机性能降低。用于制造气门导管的材料通常根据其耐高温和高压的能力进行选择。常见的材料包括青铜、铸铁，有时甚至是更先进的复合材料。每种材料都有其优缺点，影响耐用性、热导率和摩擦特性等因素。例如，青铜气门导管以其出色的耐磨性而闻名，适合高性能发动机。定期维护气门导管对于优化发动机性能至关重要。随着时间的推移，由于持续运动和暴露于高温下，气门导管可能会磨损或受损。故障气门导管的迹象包括油耗增加、排气冒蓝烟以及发动机功率明显下降。机械师通常建议在例行发动机检查期间检查气门导管的状况，特别是在老旧车辆或经历重负荷使用的车辆中。除了定期检查，了解如何更换磨损的气门导管也对汽车爱好者和机械师有益。这个过程通常涉及将气缸盖从发动机块上拆下，提取旧的气门导管，并精确安装新的。这项任务需要特定的工具和专业知识，因为不当安装可能导致后续的进一步问题。总之，气门导管是发动机功能中一个小而不可或缺的部分。它在支撑气门杆和确保适当对齐方面的作用不容小觑。通过维护气门导管并及时解决任何问题，车主可以提升发动机的性能和寿命。了解气门导管的重要性不仅有助于我们欣赏汽车工程的复杂性，还强调了定期维护对优化车辆操作的重要性。