exhaust gas recirculation

简明释义

废气再循环

英英释义

例句

1.Many modern vehicles utilize exhaust gas recirculation to reduce nitrogen oxide emissions.

许多现代车辆利用废气再循环来减少氮氧化物排放。

2.The engine's performance improved significantly after the introduction of exhaust gas recirculation.

在引入废气再循环后，发动机的性能显著提高。

3.During the emissions test, the exhaust gas recirculation system was found to be functioning well.

在排放测试中，发现废气再循环系统运作良好。

4.The exhaust gas recirculation system helps in improving fuel efficiency.

废气再循环系统有助于提高燃油效率。

5.Proper maintenance of the exhaust gas recirculation valve is crucial for optimal engine function.

正确维护废气再循环阀对发动机的最佳功能至关重要。

作文

The automotive industry is continuously evolving, driven by the need for more efficient and environmentally friendly vehicles. One of the key technologies that has emerged in recent years is exhaust gas recirculation. This innovative system plays a crucial role in reducing harmful emissions from internal combustion engines, thereby contributing to cleaner air and a healthier environment.Exhaust gas recirculation (EGR) is a process that involves redirecting a portion of the engine's exhaust gases back into the combustion chamber. This may sound counterintuitive at first, as one might assume that reintroducing exhaust gases would decrease engine performance. However, the opposite is true. By recirculating exhaust gases, the combustion temperature is lowered, which in turn reduces the formation of nitrogen oxides (NOx), one of the primary pollutants produced during combustion.The mechanism of exhaust gas recirculation is relatively straightforward. During the intake stroke of an engine cycle, a valve allows a specific amount of exhaust gas to mix with the incoming air-fuel mixture. This mixture then enters the combustion chamber, where it is ignited. The presence of exhaust gases displaces some of the oxygen in the intake air, which leads to lower combustion temperatures. Consequently, this reduction in temperature results in a significant decrease in NOx emissions, which are a major contributor to smog and acid rain.Adopting exhaust gas recirculation systems has become increasingly important as governments worldwide implement stricter emission regulations. For instance, in the United States, the Environmental Protection Agency (EPA) has set stringent guidelines for vehicle emissions. Automakers must comply with these regulations to avoid hefty fines and maintain their market position. Therefore, the integration of EGR technology is not just beneficial for the environment; it is also essential for manufacturers to remain competitive.Moreover, exhaust gas recirculation can enhance fuel efficiency. By optimizing the combustion process and reducing the amount of energy wasted in the form of heat, engines can operate more efficiently. This means that vehicles equipped with EGR systems can achieve better mileage, which is a significant advantage for consumers looking to save on fuel costs.However, despite its advantages, exhaust gas recirculation is not without challenges. The introduction of exhaust gases into the intake system can lead to increased carbon buildup in the engine over time. This can result in reduced performance and higher maintenance costs if not properly managed. Manufacturers have developed various solutions to mitigate these issues, such as using advanced materials and coatings to reduce wear and tear on engine components.In conclusion, exhaust gas recirculation is a vital technology that contributes significantly to reducing vehicle emissions and improving fuel efficiency. As the automotive industry continues to innovate and adapt to new environmental standards, EGR systems will likely play an increasingly prominent role in shaping the future of transportation. Understanding the principles and benefits of exhaust gas recirculation is essential for both consumers and industry professionals alike, as we work towards a more sustainable and eco-friendly future.

汽车工业正在不断发展，受到对更高效和环保车辆需求的驱动。近年来出现的关键技术之一是废气再循环。这个创新系统在减少内燃机有害排放方面发挥着至关重要的作用，从而有助于清洁空气和更健康的环境。废气再循环（EGR）是一个将发动机排放气体的一部分重新引导回燃烧室的过程。乍一看，这听起来可能不合常理，因为人们可能会认为重新引入废气会降低发动机性能。然而，事实恰恰相反。通过再循环废气，燃烧温度降低，从而减少氮氧化物（NOx）的形成，氮氧化物是燃烧过程中产生的主要污染物之一。废气再循环的机制相对简单。在发动机循环的进气冲程中，一个阀门允许一定量的废气与进入的空气-燃料混合物混合。然后，这种混合物进入燃烧室，在那里被点燃。废气的存在取代了进气空气中的一些氧气，从而导致燃烧温度降低。因此，这种温度降低显著减少了NOx排放，而NOx是烟雾和酸雨的主要成因。采用废气再循环系统变得越来越重要，因为全球各国政府实施了更严格的排放法规。例如，在美国，环境保护署（EPA）已制定了严格的车辆排放标准。汽车制造商必须遵守这些法规，以避免巨额罚款并保持市场地位。因此，EGR技术的整合不仅对环境有益，也是制造商保持竞争力的必要条件。此外，废气再循环还可以提高燃油效率。通过优化燃烧过程和减少以热量形式浪费的能量，发动机可以更高效地运行。这意味着配备EGR系统的车辆可以实现更好的油耗，这对希望节省燃料成本的消费者来说是一个重要优势。然而，尽管有其优点，废气再循环也面临挑战。将废气引入进气系统可能导致随着时间推移发动机内部碳积聚增加。如果不加以妥善管理，这可能导致性能下降和维护成本上升。制造商已经开发出各种解决方案来缓解这些问题，例如使用先进材料和涂层以减少发动机部件的磨损。总之，废气再循环是一项重要技术，对减少车辆排放和提高燃油效率具有重要贡献。随着汽车工业继续创新并适应新的环境标准，EGR系统可能会在塑造未来交通方面发挥越来越重要的作用。理解废气再循环的原则和好处对消费者和行业专业人士来说都是至关重要的，因为我们共同努力实现一个更加可持续和环保的未来。