基于电控集成智能控制的柴油机降油耗技术研究

摘要

为了进一步降低商用车的燃油消耗和CO2排放,开展基于发动机工况需求的电控集成优化控制研究.以某直列4缸电控共轨柴油机为研究对象,以发动机水温为反馈,对发动机水泵、节温器等电控冷却系统零部件进行综合调节,实现快速暖机升温以及正常行驶中发动机水温恒定在最佳温度,并通过优化VGT,改善燃烧过程.试验结果表明,采用智能控制系统可将冷却水温控制在各工况所对应的最优冷却水温附近,基于发动机工况需求的电控集成优化控制可以降低柴油机油耗3.51％,充分验证了智能控制方案的可行性和有效性.%In order to reduce the fuel consumption of commercial vehicle and resulting CO2 emissions further,the research on electronic integrated control based on engine operating conditions was conducted.Taking an in-line 4-cylinder common rail diesel engine as the research object,the electronic cooling system including engine water pump and thermostat was regulated according to the engine water temperature to warm the engine quickly and keep the optimal temperature during the driving.In addition,the combustion process could be improved through the optimization of VGT.The test results show that the cooling water temperature can be controlled near the corresponding optimal value under various conditions by the control system.The system can improve the fuel consumption of diesel engine by about 3.51 ％,which verifies the feasibility and effectiveness of intelligent control scheme.