after bottom dead center

简明释义

下死点后在下止点后

英英释义

例句

1.The piston moves up quickly after bottom dead center to compress the fuel-air mixture.

活塞在下死点后迅速向上移动以压缩燃油-空气混合物。

2.The engine starts generating power after bottom dead center.

发动机在下死点后开始产生动力。

3.The crankshaft rotates smoothly after bottom dead center, providing a stable power output.

曲轴在下死点后平稳旋转，提供稳定的功率输出。

4.The torque curve peaks significantly after bottom dead center in this engine design.

在这种发动机设计中，扭矩曲线在下死点后显著达到峰值。

5.We need to adjust the ignition timing to fire after bottom dead center for better efficiency.

我们需要调整点火时机，以便在下死点后点火以提高效率。

作文

In the world of engineering and mechanics, understanding the various phases of motion is crucial. One such phase that engineers often refer to is the position known as after bottom dead center. This term describes a specific point in the cycle of a piston within an engine, particularly in internal combustion engines. To fully grasp its significance, one must first understand what the 'bottom dead center' means. The bottom dead center (BDC) is the lowest point the piston reaches in its stroke. When the piston moves past this point, it is said to be in the state of after bottom dead center.

When the piston is after bottom dead center, it begins to move upward in the cylinder, compressing the air-fuel mixture that has been drawn into the combustion chamber. This phase is critical for the efficiency and power output of the engine. If the engine timing is off, or if the piston does not reach the correct position at the right time, it can lead to a loss of power or even engine failure. Therefore, engineers pay close attention to this phase during the design and testing of engines.

In practical terms, the after bottom dead center position is essential for determining the optimal timing for ignition. If the spark plug fires too early or too late in relation to the piston's position, it can result in knocking or incomplete combustion. This not only affects the performance of the engine but can also cause long-term damage. Hence, tuning the engine to ensure that the ignition occurs at the precise moment when the piston is after bottom dead center is vital for achieving maximum efficiency.

Moreover, understanding this concept is not limited to just internal combustion engines. It also applies to various types of machinery and equipment that rely on similar principles of motion. For instance, in hydraulic systems, the after bottom dead center position can affect the operation of hydraulic cylinders and their efficiency in performing work. Engineers must ensure that all components are synchronized correctly to optimize performance.

The implications of being after bottom dead center extend beyond mere technicalities. It influences the broader context of energy consumption and environmental impact. As engineers strive to create more efficient engines, understanding the nuances of each phase in the piston's movement becomes increasingly important. By optimizing the after bottom dead center timing, they can reduce fuel consumption and emissions, contributing to a more sustainable future.

In conclusion, the phrase after bottom dead center encapsulates a critical moment in the operation of engines and machinery. Its importance cannot be overstated, as it directly impacts performance, efficiency, and environmental sustainability. As technology continues to advance, the understanding and application of this concept will remain a cornerstone of engineering practices, ensuring that machines operate at their best while minimizing their ecological footprint.

在工程和机械的世界中，理解运动的各个阶段至关重要。工程师们经常提到的一个阶段是称为底部死点之后的位置。这个术语描述了活塞在发动机内运动周期中的一个特定点，特别是在内燃机中。要充分理解其重要性，首先必须了解“底部死点”的含义。底部死点（BDC）是活塞在行程中达到的最低点。当活塞超过这一点时，就被称为处于底部死点之后的状态。

当活塞处于底部死点之后时，它开始在气缸内向上移动，压缩已被吸入燃烧室的空气-燃料混合物。这个阶段对发动机的效率和功率输出至关重要。如果发动机的时序不正确，或者活塞没有在正确的时间达到正确的位置，可能会导致动力损失甚至发动机故障。因此，工程师在设计和测试发动机时，会密切关注这个阶段。

在实际操作中，底部死点之后的位置对于确定点火的最佳时机至关重要。如果火花塞在活塞位置的相对时间上过早或过晚点火，可能会导致敲击或不完全燃烧。这不仅影响发动机的性能，还可能造成长期损坏。因此，调校发动机以确保点火在活塞处于底部死点之后的精确时刻发生，对于实现最大效率至关重要。

此外，理解这个概念并不仅限于内燃机。它也适用于依赖类似运动原理的各种类型的机器和设备。例如，在液压系统中，底部死点之后的位置可以影响液压缸的操作及其在执行工作时的效率。工程师必须确保所有组件正确同步，以优化性能。

处于底部死点之后的影响超出了单纯的技术细节。它影响着能源消耗和环境影响的更广泛背景。随着工程师努力创造更高效的发动机，理解活塞运动中每个阶段的细微差别变得越来越重要。通过优化底部死点之后的时机，他们可以减少燃料消耗和排放，为可持续未来做出贡献。

总之，短语底部死点之后概括了发动机和机器操作中的一个关键时刻。它的重要性不容小觑，因为它直接影响性能、效率和环境可持续性。随着技术的不断进步，对这一概念的理解和应用将继续成为工程实践的基石，确保机器在最佳状态下运行，同时最小化其生态足迹。