| 毕世英,付曦,董艳.电加热载体技术在未来柴油机后处理系统中的应用测试[J].内燃机工程,2026,47(1):143-150. |
| 电加热载体技术在未来柴油机后处理系统中的应用测试 |
| Application Testing of Electrically Heated Catalyst Technology in Future Diesel Engine Aftertreatment Systems |
| DOI：10.13949/j.cnki.nrjgc.2026.01.015 |
| 关键词:柴油机 排放控制 电加热载体 主动再生 后处理系统 冷起动 |
| Key Words:diesel engine emission control electrically heating catalyst（EHC） active regeneration aftertreatment system cold start |
| 基金项目:国家自然科学基金项目（52107231） |
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| 摘要点击次数: 90 |
| 全文下载次数: 29 |
| 摘要:为了研究电加热载体（electrically heating catalyst， EHC）加热策略对后处理系统主动再生性能和NOx转化效率的影响，按照当前国家第六阶段机动车污染物排放标准重型发动机台架测试的方法，设计了柴油机氧化催化器（diesel oxidation catalyst， DOC）温升能力测试方案，通过全球统一轻型车辆试验循环（worldwide harmonized light vehicles test cycle， WHTC）测试完成验证。结果表明：采用EHC可以显著提高DOC的温升特性，在更加苛刻的发动机工况下能快速起燃，从而可以优化DOC的体积或贵金属用量。在WHTC冷热态循环测试中，由于EHC的辅助加热作用，NOx尾气排放最多可分别降低59.3%和84.0%。EHC也会带来一定的能耗增加，为兼顾EHC的能耗和后处理系统的NOx排放，合理的加热策略应当是：EHC只在发动机冷起动和发动机负荷突然增加的阶段工作，且以较大功率输出。 |
| Abstract:To investigate the effect of electrically heated catalyst （EHC） heating strategies on the active regeneration performance and NOx conversion efficiency of aftertreatment systems， a diesel oxidation catalyst （DOC） temperature rise capability test protocol was designed using a China Ⅵ emission-compliant heavy-duty engine bench testing platform and validated through the worldwide harmonized light vehicle test cycle （WHTC）. The results demonstrate that the EHC significantly enhances the DOC’s thermal response characteristics， enabling rapid catalyst light-off under harsher engine operating conditions， thereby optimizing the DOC volume or precious metal loading. During WHTC cold- and hot-start cycles， NOx emissions are reduced by up to 59.3% and 84.0%， respectively， owing to EHC-assisted heating. However， the EHC increases energy consumption. To balance energy usage and NOx reduction， an optimal heating strategy is proposed. The EHC should operate only during cold starts and the abrupt increase of engine load， with high-power output in the critical phases. |
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