286 Diesel Technology Copyright Goodheart-Willcox Co., Inc. Fuel Emulsion Water Diesel injector Injector pump Fuel pump Fuel tank Fuel filter Fuel pressure regulator Water pressure regulator Electronic control unit Water filter Water pump Water tank Mixing unit Water injector Figure 13-12. The components of the diesel/water emulsion system. (Harrier Inc.) Heated Line DEF Tank Unit including Supply Module (heated), Temperature and Level Sensor, Heated Reservoir and Splashing Measures Engine Control Units Exhaust Sensors Exhaust Sensors Diesel Oxidation Catalyst Diesel Particulate Filter Selective Catalytic Reduction Chamber DEF Dosing Module CAN Pressure Sensor Actuators Sensors Figure 13-11. Selective catalytic reduction system. (Ford)