Aiming at the problem that the exhaust temperature of the engine under the condition of medium and low speed and low torque cannot meet the requirements of SCR system,this paper studies the engine thermal management method from the basic principle of SCR technology and the characteristics of engine exhaust temperature.In this paper,intake throttling scheme,intake bypass scheme and non-intercooled EGR scheme are respectively adopted to study the effect of different schemes on the increase of exhaust temperature and the influence trend on fuel consumption,and finally determine the most appropriate thermal management scheme for the engine.The ideal engine thermal management measures are:non-intercooled EGR+intake throttling,mainly non-intercooled EGR scheme,assisted by intake throttling scheme.
air admission chokeair admission bypasshot-EGRincrease the exhaust temperature
万方数据
维普
