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首页> 外文会议>JSAE/SAE International Fuels and Lubricants Meeting >Effects of fuel properties on premixed charge compression ignition combustion in a direct injection diesel engine
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Effects of fuel properties on premixed charge compression ignition combustion in a direct injection diesel engine

机译：燃料特性对直喷柴油发动机中预混电荷压缩点火燃烧的影响

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Effects of fuel distillation characteristics and cetane number on premixed charge compression ignition (PCCI) combustion were investigated for the purpose of reducing NO{sub}x and PM emissions from a direct injection diesel engine. The test engine had a hole-type injection nozzle for conventional diesel combustion at high load operation. A low compression ratio and cooled EGR were applied to the test engine in order to reduce the compression temperature for avoiding pre-ignition. The investigation results show that, in the case of ignition control by EGR, a light fuel with lower distillation characteristics had an advantage of reducing smoke at higher loads. This means that high volatility fuel is effective in promoting lean mixture formation of fuel and air during the ignition delay. Moreover, lowering the cetane number was effective in reducing NO{sub}x emissions by suppression of combustion temperature. But it was understood that an optimum cetane number exists, because excessive suppression of ignitability induced an increase in HC emissions and fuel consumption under a light load. From these results, it was found that PCCI combustion could be achieved up to middle load by using a fuel with low distillation temperatures and an optimum cetane number.
机译：研究了燃料蒸馏特性和十六烷数对预混合电荷燃烧点火（PCCI）燃烧的目的，目的是从直喷式柴油发动机减少NO {SUB} X和PM排放。测试引擎在高负荷操作下具有用于传统柴油燃烧的孔型注射喷嘴。将低压缩比和冷却的EGR施加到测试发动机上，以减小避免预点火的压缩温度。研究结果表明，在EGR的点火控制的情况下，具有较低蒸馏特性的轻型燃料具有在更高负载下减少烟雾的优点。这意味着高挥发性燃料在点火延迟期间促进燃料和空气的稀释混合物形成有效。此外，降低十六烷值是通过抑制燃烧温度来减少NO {Sub} X排放的有效性。但是，据了解，存在最佳的十六烷数，因为在轻负载下，对可燃性的过度抑制引起了HC排放量和燃料消耗的增加。从这些结果来看，发现通过使用具有低蒸馏温度和最佳十六烷数的燃料，可以通过燃料实现PCCI燃烧。

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