满足国ⅳ排放法规的某柴油机改进设计和试验.pdfVIP

ISSN 1674-8484 汽车安全与节能学报, 2013 年, 第4 卷 第4 期 11/ 12 CN 11-5904/U J Automotive Safety and Energy, 2013, Vol. 4 No. 4 372 —378 满足国Ⅳ排放法规的某柴油机改进设计和试验 郭洪辉，陆子平，潘明军，刘  涛 （北汽福田汽车股份有限公司，北京 102206，中国） 摘  要： 为满足国Ⅳ排放法规的要求，在某国产二气门国Ⅲ柴油机基础上，改进了增压器及燃烧系统 的设计：升级电控系统，设计燃烧室，优化喷油器、增压器，采用冷却废气再循环（EGR）和先进的 后处理技术等；并对增压器、燃烧室、供油提前角、轨压、EGR 进行排放优化选型及排放标定试验， 测量了功率、扭矩、油耗、烟度、气体排放和EGR率、噪声等排放和性能参数，确定了该EGR系统 及标定策略。对整机进行了车载故障诊断 (OBD) 标定。结果表明：这些措施改善了排放和性能；使该 柴油机达到了国Ⅳ排放标准，怠速噪声由原来的74 dB降到70 dB。 关键词： 柴油机；国Ⅳ排放法规；废气再循环(EGR)；燃烧室；喷油器；增压器；车载故障诊断 中图分类号： TK 421+.5 文献标志码： A DOI： 10.3969/j.issn.1674-8484.2013.04.011 Improved designs and tests for an China Ⅳ diesel engine GUO Honghui, LU Ziping, PAN Mingjun, LIU Tao BeiqiFoton Motor Co., Ltd （ , Beij ing 102206, China ） Abstract: A two-valve CN-III diesel engine was improved by designs and tests to meet the CN (China)-IV emission regulation. The improved designs involved upgrading the electronic control system, redesigning the combustion chamber, optimizing the injector and the turbocharger, adopting the exhaust gas recirculation (EGR) and the advanced after-treatment technology. The turbocharger, the combustion chamber, the fuel supply advance angle, the rail pressure and EGR were optimized and calibrated. The performance tests, the emission tests and the noise tests were completed. The EGR system and the calibration strategy were confirmed by measuring and analyzing the parameters ofpower, torque, fuel consumption, smoke, emission, EGR rates, and the idle speed noise. The vehicle was calibrated by OBD (on-board di