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首页> 外文期刊>The International Journal of Environmental Studies >Increasing the efficiency of lean-burn automotive engines
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Increasing the efficiency of lean-burn automotive engines

机译：提高稀燃汽车发动机的效率

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摘要

Transportation is responsible for a large fraction of all of the energy consumed, in the world today, and most of this energy is derived from fossil fuels. The combustion of fossil fuels in motor vehicle engines is therefore a major contributor to greenhouse gas emissions and smog production. Improved engine designs, which would provide higher efficiency and lower emissions, would therefore be very beneficial for the global environment. This paper describes two different techniques aimed at increasing the thermal efficiency, and reducing the exhaust emissions from lean-burn spark-ignited internal combustion engines by extending the lean-limit of operation. The first technique relies on a unique architecture for the 'bowl-in-piston' combustion chamber design to enhance turbulence generation, while the second technique introduces a small quantity of fuel through the spark plug to provide a relatively rich mixture near the spark electrodes during the ignition process. Both techniques were found to increase the burning rate of very lean air-fuel mixtures, thereby providing greater specific power output with a corresponding reduction in brake specific fuel consumption.
机译：在当今世界，运输消耗的所有能源中有很大一部分是能源，而且这种能源中的大部分来自化石燃料。因此，机动车辆发动机中化石燃料的燃烧是导致温室气体排放和烟雾产生的主要因素。因此，改进的发动机设计将提供更高的效率和更低的排放，因此对全球环境将非常有益。本文介绍了两种不同的技术，旨在通过扩展运行的稀薄极限来提高热效率，并减少稀薄火花点火式内燃机的废气排放。第一种技术依赖于“活塞碗式”燃烧室设计的独特体系结构，以增强湍流的产生，而第二种技术则通过火花塞引入少量燃料，从而在点火期间在火花电极附近提供了相对较浓的混合物。点火过程。发现这两种技术都可以增加非常稀薄的空气燃料混合物的燃烧速率，从而提供更大的比功率输出，并相应地降低了制动器的比燃料消耗。

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