中国机械工程Issue(9)：1268-1272,5.DOI:10.3969/j.issn.1004-132X.2014.09.024
发动机辅助制动性能仿真研究
Performance Simulation of Engine Supplementary Brake
摘要
Abstract
A mathematical model of the engine supplementary brake was set up through discussing the working processes of engine supplementary brake.According to reference parameters of the sup-plementary brake (including the exhaust valve lash,engine speed,exhaust back pressure,etc.),the engine supplementary brake was analyzed with univariate and multivariate conditions by the method of numerical simulations and experimental tests.The results show that the cylinder pressure increases with speed and the peak pressure phase is more near the top dead center(TDC)under the higher speed conditions.The brake torque increases with the engine speed increase.The de-compressure brake has a maximum brake torque while the engine brake has the minimum brake torque.When the engine speed is constant,the bleeding brake and the de-compressure brake have a corresponding optimal ex-haust valve lash,respectively.The higher the speed is,the bigger the exhaust valve lash is.The higher the exhaust back pressure is,the more the brake torque is.关键词
发动机/辅助制动/制动扭矩/排气背压Key words
engine/supplementary brake/brake torque/exhaust back pressure分类
交通工程引用本文复制引用
龚金科,颜胜,黄张伟,贾国海..发动机辅助制动性能仿真研究[J].中国机械工程,2014,(9):1268-1272,5.基金项目
国家高技术研究发展计划(863计划)资助项目(2008AA11A116) （863计划）
汽车车身先进设计制造国家重点实验室自主课题(61075002) （61075002）
