公开(公告)号：US20020059797A1

公开(公告)日：2002-05-23

申请号：US10010089

申请日：2001-12-06

申请人： Detroit Diesel Corporation

发明人： Admir M. Kreso

IPC分类号： F02D023/00

CPC分类号： F02D41/0072 ,  F02B37/24 ,  F02D2041/0067 ,  F02D2200/0406 ,  F02D2200/0414 ,  G01F1/36 ,  G01F1/42 ,  Y02T10/144 ,  Y02T10/47

摘要： A system and method for measuring the flow rate of recirculated exhaust gas in a compression ignition engine including a plurality of engine sensors having outputs indicative of current engine conditions and a turbocharger. The system includes an exhaust gas recirculation (EGR) valve mounted in the exhaust pipe upstream of the turbocharger for diverting a selectable portion of the exhaust gas for recirculation and combination with the charge air, one or more sensors for sensing current conditions of the recirculated exhaust gas, including temperature and pressure, one or more sensors for sensing current conditions of the intake air, and control logic for determining the flow rate of the recirculated exhaust gas as a function of the sensed conditions. In one embodiment, the system includes an obstruction in the flow path of the recirculated exhaust gas and a differential pressure sensor for determining the pressure differential between a point upstream of the obstruction and a point downstream of the obstruction and control logic for determining the flow rate of the recirculated exhaust gas as a function of the current intake manifold pressure, the recirculated exhaust gas temperature, and the differential pressure drop across the obstruction.

摘要翻译： 一种用于测量压缩点火发动机中再循环废气的流量的系统和方法，包括具有指示当前发动机状况的输出的多个发动机传感器和涡轮增压器。 该系统包括安装在涡轮增压器上游的排气管中的排气再循环（EGR）阀，用于转向排气的可选择部分以再循环并与增压空气组合，一个或多个传感器，用于感测再循环排气的当前状况 气体，包括温度和压力，用于感测进气的当前状况的一个或多个传感器，以及用于根据感测到的条件确定再循环废气的流量的控制逻辑。 在一个实施例中，系统包括在再循环废气的流动路径中的障碍物和差压传感器，用于确定障碍物上游的点与障碍物下游点之间的压力差和用于确定流量的控制逻辑 作为当前进气歧管压力，再循环排气温度和阻塞上的差压压力的函数的再循环废气。