COMPONENTS The primary purpose of the EGR cooler (see Figure 2-10), is to cool the exhaust gases by: Providing a coolant flow to remove heat from the gas side core. Delta Pressure Sensor/EGR Temperature Sensor Figure 2-11 Venturi Monitoring the pressure differential across the venturi (adjacent to outlet of EGR cooler see Figure 2-11 and see Figure 2-12) and the temperature of the exhaust gases (see Figure 2-13) determine precise Mass Flow Rate Measurement. The ECM uses the delta pressure and exhaust temperature to determine the rate of EGR flow. 2-10 All information subject to change without notice. (Rev. April 2004) 7SE60 0404 Copyright © 2004 DETROIT DIESEL CORPORATION