城市公交车用柴油机掺烧LPG技术策略

Technology of blending LPG in diesel engines of urban buses

School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China

摘要: 针对车用柴油机的运行特点, 研究了柴油机掺烧LPG(液化石油气)的技术策略, 采用一种以型板为特征的双燃料供给系统, 由台架试验确定柴油/LPG掺烧比例。台架试验和发动机装车试验表明, 采用该技术策略改装的柴油/LPG双燃料发动机, 能够满足城市公交汽车的使用要求
- 车用柴油机 /
- 液化石油气 /
- 公交汽车
Abstract: Aiming at the working characteristics of bus diesel engines, the tech-strategy on blending LPG in diesel engines was presented.Using a type of bi-fuel supply system that was characterized by a mould pattern, the content ratios of diesel /LPG fuel were determined by engine experiments. The engine experiments and the bus engine tests indicate that the strategy is able to meet the demands of the urban buses.
- vehicle diesel engine /
- LPG /
- bus

图 1 柴油/LPG双燃料发动机系统

Figure 1. The diesel/LPG dual fuel engine system

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图 2 2000 r/min 90%负荷气缸压力

Figure 2. Pressure curve in cylinder under high load

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图 3 不同LPG掺烧比例的烟度

Figure 3. Soot emission in different proportion of LPG

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图 4 全负荷工况掺烧LPG前后能耗对比

Figure 4. Energy consumption curve under full load

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图 5 全负荷工况掺烧LPG前后排气温度

Figure 5. Temperature curve of exhaust under full load

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图 6 2000 r/min, 25%负荷气缸压力

Figure 6. Pressure curve in cylinder under low load

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图 7 25%负荷工况的能耗对比

Figure 7. Energy consumption curve under low load

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图 8 10辆样车排放烟度测试结果

Figure 8. The soot emission of experimental buses

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表 1 动力性试验结果

Table 1. Experimental results of power performance

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表 2 燃料消耗试验结果

Table 2. Experimental results of energy consumption

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