田茂军,邓力,税绍强,等.测试循环和曲轴箱废气对小功率非道路柴油机排放的影响[J].内燃机工程,2026,47(1):135-142.
测试循环和曲轴箱废气对小功率非道路柴油机排放的影响
Influences of Test Cycles and Crankcase Exhaust Gas on the Emissions of Small-Power Non-Road Diesel Engines
DOI：10.13949/j.cnki.nrjgc.2026.01.014
关键词:非道路  排放  测试循环  曲轴箱  柴油机
Key Words:non-road  emission  test cycle  crankcase  diesel engine
基金项目:
作者单位E-mail
田茂军* 中国汽车工程研究院股份有限公司，重庆 401122 tianmaojun@caeri.com.cn 
邓力 中国汽车工程研究院股份有限公司，重庆 401122 dengli@caeri.com.cn 
税绍强 中国汽车工程研究院股份有限公司，重庆 401122 shuishaoqiang@caeri.com.cn 
周圣凯 中国汽车工程研究院股份有限公司，重庆 401122 zhoushengkai@caeri.com.cn 
丁小荣 中国汽车工程研究院股份有限公司，重庆 401122 dingxiaorong@caeri.com.cn 
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摘要:采用两台满足美国Tier 4f标准要求的典型技术路线柴油机开展试验，分析了离散工况和斜坡过渡工况模式及曲轴箱废气对小功率非道路柴油机排放的影响。结果表明：稳态循环斜坡过渡工况模式较离散工况模式有更多的负荷加载过程，且为全过程采样，可更全面地考核配置柴油机颗粒捕集器对发动机排放的控制能力。稳态循环斜坡过渡工况模式对发动机负荷加载过程的污染物排放控制更有利，但对无后处理系统的发动机排放无显著影响。对于配置柴油机颗粒捕集器的最大功率介于19~37 kW功率段的柴油机，负荷加载过程会导致原机排放及颗粒捕集器后的CO、碳氢等污染物排放出现显著的突变峰值，但对NOx排放无显著影响。虽然曲轴箱废气量相对排气量较少，但由于该功率段柴油机的尾气通过了高效的后处理系统处理，使得曲轴箱废气污染物浓度明显比尾气排放高。随着法规限值的加严，有必要将曲轴箱废气纳入排放控制范围。
Abstract:Experimental investigations were conducted on two diesel engines that implement typical technological routes compliant with the U.S. Environmental Protection Agency （EPA） Tier 4f standards. The influences of the ramped modal cycle （RMC） and the discrete mode cycle （DMC）， along with crankcase emissions， on the exhaust performance of small-power non-road diesel engines were analyzed. Results indicate that， under steady-state conditions， compared to the DMC， the RMC incorporates more load-loading phases， and it’s a full-process sampling cycle which provides a more comprehensive assessment of the emission control capability of engines equipped with a diesel particulate filter （DPF）. The RMC is favorable for controlling pollutant emissions during engine load transients. However， it has no significant influences on engines without aftertreatment systems. For a DPF-equipped engine within the 19~37 kW maximum power range， the load-loading process induces significant peak emissions of CO and hydrocarbons in both raw and tailpipe exhaust， while it has no notable effects on NOx emissions. Although the volume of crankcase gases is relatively minor compared to that of the exhaust flow， owing to the high efficiency of the aftertreatment system， the pollutant concentration of crankcase emissions is significantly higher than that of the tailpipe exhaust. With tightening regulatory limits， crankcase emissions should be included in the emission control scope.
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