four-stroke marine diesel

简明释义

四冲程船用柴油机

英英释义

例句

1.The maintenance costs of a four-stroke marine diesel are generally lower compared to two-stroke engines.

与二冲程发动机相比，四冲程船用柴油机的维护成本通常较低。

2.Many modern cargo ships utilize a four-stroke marine diesel to reduce emissions.

许多现代货船使用四冲程船用柴油机来减少排放。

3.The ship's engine is powered by a four-stroke marine diesel, which provides excellent fuel efficiency.

这艘船的引擎由四冲程船用柴油机提供动力，具有出色的燃油效率。

4.The four-stroke marine diesel is designed to operate efficiently at various loads.

四冲程船用柴油机被设计为在不同负载下高效运行。

5.Engineers prefer four-stroke marine diesel for its reliability and longevity in maritime applications.

工程师们更喜欢四冲程船用柴油机，因为它在海事应用中的可靠性和耐用性。

作文

The world of marine engineering is vast and complex, with numerous components working together to ensure the smooth operation of vessels at sea. One of the most crucial elements in this field is the engine that powers these ships. Among the various types of engines, the four-stroke marine diesel stands out for its efficiency and reliability. Understanding how a four-stroke marine diesel engine operates can provide insights into its importance in maritime activities.A four-stroke marine diesel engine operates on a cycle that includes four distinct strokes: intake, compression, power, and exhaust. During the intake stroke, air is drawn into the cylinder as the piston moves down. This is followed by the compression stroke, where the piston moves back up, compressing the air within the cylinder. The high pressure and temperature caused by this compression lead to the ignition of the diesel fuel injected into the cylinder, resulting in a powerful explosion during the power stroke. Finally, in the exhaust stroke, the piston moves back down, expelling the burnt gases from the cylinder.One of the primary advantages of a four-stroke marine diesel engine is its fuel efficiency. Compared to two-stroke engines, which fire once every revolution of the crankshaft, the four-stroke marine diesel fires once every two revolutions. This allows for a more complete combustion of fuel, translating to lower fuel consumption and reduced emissions. In an era where environmental considerations are paramount, the four-stroke marine diesel engine offers a more sustainable option for marine transportation.Moreover, the design of a four-stroke marine diesel engine allows for a more controlled and stable operation. The longer cycle time provides ample opportunity for the combustion process to occur smoothly, which results in less vibration and noise compared to other engine types. This is particularly important for large vessels, where comfort and stability are critical for both crew and cargo.In addition to its operational benefits, the four-stroke marine diesel engine is also known for its durability and longevity. These engines are built to withstand the harsh conditions of marine environments, including saltwater corrosion and extreme weather. With proper maintenance, a four-stroke marine diesel can function efficiently for many years, making it a cost-effective choice for ship owners.However, it is essential to recognize that operating a four-stroke marine diesel engine requires a skilled workforce. Engineers and technicians must be well-trained to handle the intricacies of these engines, including troubleshooting and maintenance. As technology evolves, so too do the systems and components associated with four-stroke marine diesel engines, necessitating ongoing education and training for those in the field.In conclusion, the four-stroke marine diesel engine plays a vital role in the maritime industry. Its efficiency, reliability, and durability make it a preferred choice for many vessels navigating the world's oceans. As we continue to advance towards more sustainable practices in shipping and transportation, the four-stroke marine diesel engine will undoubtedly remain a cornerstone of marine engineering. Understanding its operation and benefits is crucial for anyone involved in the maritime sector, ensuring that we can harness its potential for years to come.

海洋工程的世界广阔而复杂，众多组件协同工作，以确保船只在海上的顺利运行。在这个领域中，驱动这些船只的引擎是最关键的元素之一。在各种类型的引擎中，四冲程船用柴油机因其高效性和可靠性而脱颖而出。理解四冲程船用柴油机的工作原理可以深入了解其在海事活动中的重要性。四冲程船用柴油机的工作周期包括四个不同的冲程：进气、压缩、动力和排气。在进气冲程中，空气在活塞下移时被吸入气缸。接下来是压缩冲程，活塞向上移动，压缩气缸内的空气。由于这种压缩造成的高压和高温，导致喷入气缸的柴油燃料点燃，在动力冲程中产生强大的爆炸。最后，在排气冲程中，活塞再次向下移动，将燃烧后的气体排出气缸。四冲程船用柴油机的主要优点之一是其燃油效率。与每转一圈曲轴就点火一次的二冲程引擎相比，四冲程船用柴油机每两圈才点火一次。这允许燃料更完全地燃烧，从而降低燃油消耗和减少排放。在环保问题至关重要的时代，四冲程船用柴油机为海洋运输提供了更可持续的选择。此外，四冲程船用柴油机的设计使其具有更可控和稳定的操作。较长的循环时间为燃烧过程的平稳进行提供了充分的机会，这导致相较于其他类型的引擎，振动和噪音更少。这对于大型船只尤其重要，因为船员和货物的舒适性和稳定性至关重要。除了操作上的好处外，四冲程船用柴油机还以其耐用性和长寿命而闻名。这些引擎旨在承受海洋环境的恶劣条件，包括盐水腐蚀和极端天气。经过适当的维护，四冲程船用柴油机可以高效运行多年，使其成为船主的经济选择。然而，必须认识到，操作四冲程船用柴油机需要熟练的劳动力。工程师和技术人员必须经过良好的培训，以处理这些引擎的复杂性，包括故障排除和维护。随着技术的发展，与四冲程船用柴油机相关的系统和组件也在不断演变，要求该领域的人员进行持续的教育和培训。总之，四冲程船用柴油机在海事行业中发挥着至关重要的作用。其效率、可靠性和耐用性使其成为许多航行于世界海洋的船只的首选。随着我们继续朝着更可持续的航运和运输实践迈进，四冲程船用柴油机无疑将继续成为海洋工程的基石。理解其操作和优点对于任何参与海事行业的人来说都是至关重要的，确保我们能够在未来几年充分利用其潜力。