Low Temperature Combustion in a Heavy Duty Diesel Engine Using High Levels of EGR
Low Temperature Combustion in a Heavy Duty Diesel Engine Using High Levels of EGR
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DOI：
10.4271/2006-01-0075
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发表时间：
2006-04
期刊：
影响因子：
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通讯作者：
Malin Alriksson;I. Denbratt
中科院分区：
文献类型：
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作者：
Malin Alriksson;I. Denbratt
在使用单缸研究发动机的一系列实验中，研究了通过使用低温燃烧结合高水平EGR来扩大发动机负载范围的可能性，其中可以最大限度地减少碳烟和氮氧化物排放。结果表明，通过将压缩比降低到14并应用高水平的EGR（高达约60%），可以在高达50%的发动机负荷下实现非常低水平的碳烟和NOx排放。不幸的是，低温燃烧伴随着燃料消耗和HC和CO排放的增加。然而，这些缺点可以通过提前喷射正时来减少。研究发动机是2升直喷（DI）、增压、重型、单缸柴油发动机，其几何形状基于沃尔沃的12升发动机，并且通过调节排气背压同时保持增压空气压力恒定来增加EGR量。
The possibilities for extending the range of engine loads in which soot and NOx emissions can be minimised by using low temperature combustion in conjunction with high levels of EGR was investigated in a series of experiments with a single cylinder research engine. The results show that very low levels of both soot and NOx emissions can be achieved at engine loads up to 50 % by reducing the compression ratio to 14 and applying high levels of EGR (up to approximately 60 %). Unfortunately, the low temperature combustion is accompanied by increases in fuel consumption and emissions of both HC and CO. However, these drawbacks can be reduced by advancing the injection timing. The research engine was a 2 litre direct injected (DI), supercharged, heavy duty, single cylinder diesel engine with a geometry based on Volvo's 12 litre engine, and the amount of EGR was increased by adjusting the exhaust back pressure while keeping the charge air pressure constant.