| 不同排放标准公交车燃用生物柴油颗粒物排放特性 |
| 摘要点击 3044 全文点击 1425 投稿时间：2016-12-05 修订日期：2016-12-27 |
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| 中文关键词 柴油公交车 生物柴油 颗粒排放 排放标准 中国典型城市公交循环 |
| 英文关键词 diesel bus biodiesel particulate emission emission standard China city bus driving cycle (CCBC) |
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| 中文摘要 |
| 基于重型底盘测功机，对比研究了满足国Ⅲ、国Ⅳ、国Ⅴ排放标准的柴油公交车分别燃用生物柴油与柴油混合燃料B0/B5/B10在中国典型城市公交车循环下的颗粒物排放特性.结果表明燃用B0/B5/B10时，国Ⅴ车相对国Ⅲ车总颗粒数量和质量排放分别降低约68.1%、56.2%、57.5%和52.7%、64.8%、88.5%，相对国Ⅳ车，总颗粒质量排放分别降低了约43.0%、47.3%和42.1%，但数量排放分别上升了约4.0%、7.6%和14.7%.国Ⅲ车核态颗粒排放主要来自高速行驶工况，而国Ⅳ、国Ⅴ车主要来自中低速行驶工况；国Ⅲ、国Ⅳ、国Ⅴ车聚集态颗粒排放主要都来自中低速行驶工况.其中在车速较低时，国Ⅴ、国Ⅳ车相对国Ⅲ车核态颗粒数量和质量排放明显降低，聚积态颗粒也有降低，但国Ⅴ车相对国Ⅳ车改善不明显，核态颗粒数量和质量排放反而增加，且随着生物柴油掺混比例的上升，增幅越明显.在高速时，国Ⅲ车核态颗粒数量和质量排放急剧增加，国Ⅴ、国Ⅳ车略有增加，且国Ⅳ车聚集态颗粒数量和质量排放明显大于国Ⅴ车和国Ⅲ车.燃用生物柴油掺混比例较大的B10时，国Ⅲ车较大粒径颗粒排放急剧恶化，聚集态颗粒数量和质量排放大幅增加，不适合推广应用较大生物柴油掺混比燃油. |
| 英文摘要 |
| Based on heavy chassis dynamometer, an experimental study was conducted in diesel buses compliant with China Ⅲ,Ⅳ,Ⅴ emissions standards respectively, fueled with three different blends of petroleum diesel/biodiesel (0%,5%and 10%, V/V biodiesel blends), which investigated the characteristics of particulate matter (PM) emission under CCBC driving cycle. Results of study showed that the total PM number and mass emission from China Ⅴ bus respectively decreased by 68.1%,56.2%,57.5% and 52.7%,64.8%, 88.5% compared to China Ⅲ bus. When compared to China Ⅳ bus, the PM mass emission decreased by 43.0%, 47.3% and 42.1%, while the number increased by 4.0%,7.6% and 14.7%. The nucleation mode PM emission of China Ⅲ bus was mainly from high-speed driving condition, while China Ⅳ and Ⅴ buses were from middle-low speed. The accumulation mode PM emissions of China Ⅲ, Ⅳ and V buses were all mainly from middle-low speed driving conditions. In relatively lower speed conditions, compared to China Ⅲ bus, the nucleation mode PM emissions of China Ⅳ and Ⅴ buses obviously decreased, so was accumulation mode PM. Compared to China Ⅳ bus, emission of China Ⅴ bus did not improve obviously and the nucleation mode PM emission even increased. In high-speed driving condition, the nucleation mode PM emission from China Ⅲ bus increased dramatically, while those from China Ⅴ and Ⅳ buses slightly increased. Meanwhile, the accumulation PM number and mass emission of China Ⅳ bus was obviously higher than those of China Ⅴ and Ⅲ buses. When fueled with B10, the relatively bigger sizes PM emission of China Ⅲ bus deteriorated rapidly, indicating that China Ⅲ bus was not suitable for fuel with high blending ratio of biodiesel. |
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