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| 冷热启动方式和后处理对细颗粒物排放的影响 |
| Effect of cold and hot start and catalytic on fine particulate emissions |
| 关键词:细颗粒物 实际行驶污染物放 冷启动 热启动 颗粒捕集器 |
| Key Words:fine particulate matter real drive emission cold start hot start gasoline particulate filter |
| 基金项目: |
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| 摘要:采用实际行驶污染物排放测试的方法，对 2 辆国六轻型汽油车的细颗粒物排放进行研究，重点分析冷、热启动 和 GPF 对细颗粒物的影响。结果表明，PN10nm 主要产生在冷启动阶段，且排放峰值易出现在急加速和急减速工况，最高排 放峰值为 8.10×1011 个/s。带 GPF 车辆的 PN23nm 和 PN10nm 在各速度段的占比分布差异较大，总行程的 PN10nm 数量较 PN23nm 增长 30.9%，增长率为不配备 GPF 车辆的 3 倍左右。低温下细颗粒物排放较常温大幅度上升，且带有 GPF 车的增 长幅度明显较高。研究发现，冷启动阶段的细颗粒排放控制是未来监管的重点 |
| Abstract:Using real drive emission test, the fine particulate emissions of two China VI light-duty gasoline vehicles were investigated, focused on analyzing the effects of cold and hot start and GPF on fine particulate. The results showed that PN10nm is mainly generated in the cold start, and the emission peak is prone to occur in the rapid acceleration and deceleration conditions, with the highest emission peak of 8.10×1011 #/s.The distribution of the percentage of PN23nm and PN10nm in the speed bands of the vehicles with GPF is widely different, and the number of PN10nm in the total trip is increased by 30.9% compared with that of PN23nm, a growth rate about three times that of vehicles without GPF. Particulate matter emissions increase significantly at low temperatures, with vehicles equipped with GPF showing a notably higher growth rate. The study concludes that controlling particulate emissions during cold starts will be a key focus of future particulate matter regulations. |
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