overhead valve engine

简明释义

顶阀式发动机

英英释义

例句

1.The mechanic explained that the overhead valve engine 顶置气门发动机 allows for better airflow and efficiency.

机械师解释说，overhead valve engine 顶置气门发动机可以改善气流和效率。

2.Many classic cars are equipped with a reliable overhead valve engine 顶置气门发动机 design.

许多经典汽车都配备了可靠的overhead valve engine 顶置气门发动机设计。

3.With its overhead valve engine 顶置气门发动机, this motorcycle delivers impressive horsepower.

这款摩托车配备的overhead valve engine 顶置气门发动机提供了令人印象深刻的马力。

4.The new sports car features an advanced overhead valve engine 顶置气门发动机 that enhances its performance.

这款新跑车配备了一台先进的overhead valve engine 顶置气门发动机，提升了其性能。

5.The overhead valve engine 顶置气门发动机 is known for its durability and low maintenance needs.

overhead valve engine 顶置气门发动机以其耐用性和低维护需求而闻名。

作文

The automotive industry has seen a significant evolution over the decades, with various innovations enhancing engine performance and efficiency. One of the key advancements in engine design is the development of the overhead valve engine. An overhead valve engine (OHV) is a type of internal combustion engine where the valves are located in the cylinder head, above the combustion chamber. This design contrasts with older engine types where the valves were placed in the engine block. The overhead valve engine provides several advantages that have made it a popular choice among manufacturers and enthusiasts alike.First and foremost, the overhead valve engine allows for better airflow into and out of the combustion chamber. With the valves positioned closer to the combustion area, the engine can breathe more efficiently, leading to improved power output. This increased airflow is crucial for optimizing combustion, which ultimately enhances the engine's performance. Additionally, the overhead valve engine typically features a simpler valve train design, reducing the number of moving parts. This simplification not only decreases the overall weight of the engine but also contributes to improved reliability and easier maintenance.Moreover, the overhead valve engine design often results in a more compact engine layout. By placing the valves in the cylinder head, engineers can create smaller engine blocks without sacrificing power. This compactness is particularly advantageous in modern vehicles, where space is at a premium. A smaller engine can lead to lighter vehicles, which in turn can enhance fuel efficiency and handling characteristics.Another noteworthy aspect of the overhead valve engine is its adaptability to various fuel types. Many OHV engines are designed to run on different fuels, including gasoline, diesel, and even alternative fuels. This versatility makes them suitable for a wide range of applications, from passenger cars to heavy-duty trucks and machinery. As the automotive industry moves towards more sustainable practices, the ability of the overhead valve engine to accommodate various fuel types becomes increasingly important.In terms of performance, the overhead valve engine is known for its strong low-end torque. This characteristic is particularly beneficial for vehicles that require quick acceleration or towing capabilities. The engine's design allows it to deliver power smoothly at lower RPMs, making it ideal for trucks and SUVs. Furthermore, advancements in technology have enabled the overhead valve engine to achieve higher compression ratios, further enhancing its efficiency and power output.Despite these advantages, the overhead valve engine does have some limitations. For instance, it may not reach the same high RPMs as other engine designs, such as overhead camshaft (OHC) engines. This limitation can affect peak power output, particularly in racing applications where maximum RPM is critical. However, for everyday driving and utility applications, the benefits of the overhead valve engine often outweigh this drawback.In conclusion, the overhead valve engine represents a significant advancement in engine technology, offering numerous benefits in terms of performance, efficiency, and adaptability. Its design allows for improved airflow, a compact layout, and strong low-end torque, making it a favored choice in the automotive world. As the industry continues to evolve, the overhead valve engine will likely remain a key player in the quest for more efficient and powerful vehicles.

汽车工业在几十年间经历了显著的演变，各种创新提升了发动机的性能和效率。发动机设计中的一个关键进展是<overhead valve engine>的开发。<overhead valve engine>（OHV）是一种内燃机类型，其中气门位于气缸头上方，位于燃烧室之上。这种设计与较旧的发动机类型形成对比，后者将气门放置在发动机块中。<overhead valve engine>提供了几个优势，这使其成为制造商和爱好者的热门选择。首先，<overhead valve engine>允许更好的空气流入和流出燃烧室。由于气门位置靠近燃烧区域，发动机可以更有效地呼吸，从而提高功率输出。这种增加的空气流动对优化燃烧至关重要，最终增强了发动机的性能。此外，<overhead valve engine>通常具有更简单的气门传动系统设计，减少了运动部件的数量。这种简化不仅降低了发动机的整体重量，还提高了可靠性并便于维护。此外，<overhead valve engine>设计通常导致更紧凑的发动机布局。通过将气门放置在气缸头中，工程师可以在不牺牲功率的情况下创建更小的发动机块。这种紧凑性在现代车辆中尤为有利，因为空间非常有限。更小的发动机可以导致更轻的车辆，进而提高燃油效率和操控特性。<overhead valve engine>的另一个值得注意的方面是其对各种燃料类型的适应性。许多OHV发动机被设计为可以使用不同的燃料，包括汽油、柴油甚至替代燃料。这种多功能性使它们适用于从乘用车到重型卡车和机械的广泛应用。随着汽车工业向更可持续的实践发展，<overhead valve engine>能够适应各种燃料类型的重要性日益凸显。在性能方面，<overhead valve engine>以其强大的低速扭矩而闻名。这一特性对需要快速加速或拖曳能力的车辆尤其有利。发动机的设计使其能够在较低的转速下平稳输出功率，非常适合卡车和SUV。此外，技术的进步使<overhead valve engine>能够实现更高的压缩比，进一步增强了其效率和功率输出。尽管有这些优点，<overhead valve engine>确实存在一些局限性。例如，它可能无法达到其他发动机设计（如顶置凸轮轴（OHC）发动机）的相同高转速。这一限制可能会影响峰值功率输出，特别是在赛车应用中，最大转速至关重要。然而，对于日常驾驶和实用应用而言，<overhead valve engine>的好处往往超过了这一缺点。总之，<overhead valve engine>代表了发动机技术的重大进步，在性能、效率和适应性方面提供了众多好处。其设计允许改善空气流动、紧凑布局和强大的低速扭矩，使其成为汽车世界中的热门选择。随着行业的不断发展，<overhead valve engine>可能仍将是追求更高效、更强大车辆的关键参与者。