The present paper addresses the optimal heat release （HR） law in a single cylinder engine operated under reactivity controlled compression ignition （RCCl） combustion mode to minimise the indicated specific fuel co...The present paper addresses the optimal heat release （HR） law in a single cylinder engine operated under reactivity controlled compression ignition （RCCl） combustion mode to minimise the indicated specific fuel consumption （ISFC） subject to different constraints including pressure related limits （maximum cylinder pressure and maximum cylinder pressure gradient）. With this aim, a 0-dimensional （OD） engine combustion model has been identified with experimental data. Then, the optimal control problem of minimising the ISFC of the engine at different operating conditions of the engine operating map has been stated and analytically solved. To evaluate the method viability a data-driven model is developed to obtain the control actions （gasoline fraction） leading to the calculated optimal HR, more precisely to the optimal ratio between premixed and diffusive combustion. The experimental results obtained with such controls and the differences with the optimal HR are finally explained and discussed.展开更多
为解决机械喷油泵双燃料发动机燃气替代率低、排放指标差的问题,采用燃油、燃气双电子控制单元(electronic control unit,ECU)控制技术,开发Z6180/S油气双ECU双燃料发动机。发动机台架和2500 h排放耐久性试验结果表明:双ECU控制技术可...为解决机械喷油泵双燃料发动机燃气替代率低、排放指标差的问题,采用燃油、燃气双电子控制单元(electronic control unit,ECU)控制技术,开发Z6180/S油气双ECU双燃料发动机。发动机台架和2500 h排放耐久性试验结果表明:双ECU控制技术可以实现对发动机全工况及不同工作模式下的燃料精确喷射和燃烧优化调节,Z6180/S油气双ECU双燃料发动机燃气替代率可达90%,污染物排放满足国家相关标准要求。展开更多
文摘The present paper addresses the optimal heat release （HR） law in a single cylinder engine operated under reactivity controlled compression ignition （RCCl） combustion mode to minimise the indicated specific fuel consumption （ISFC） subject to different constraints including pressure related limits （maximum cylinder pressure and maximum cylinder pressure gradient）. With this aim, a 0-dimensional （OD） engine combustion model has been identified with experimental data. Then, the optimal control problem of minimising the ISFC of the engine at different operating conditions of the engine operating map has been stated and analytically solved. To evaluate the method viability a data-driven model is developed to obtain the control actions （gasoline fraction） leading to the calculated optimal HR, more precisely to the optimal ratio between premixed and diffusive combustion. The experimental results obtained with such controls and the differences with the optimal HR are finally explained and discussed.
文摘为解决机械喷油泵双燃料发动机燃气替代率低、排放指标差的问题,采用燃油、燃气双电子控制单元(electronic control unit,ECU)控制技术,开发Z6180/S油气双ECU双燃料发动机。发动机台架和2500 h排放耐久性试验结果表明:双ECU控制技术可以实现对发动机全工况及不同工作模式下的燃料精确喷射和燃烧优化调节,Z6180/S油气双ECU双燃料发动机燃气替代率可达90%,污染物排放满足国家相关标准要求。
