5-111.bk Page 19 Monday, July 10, 2006 2:26 PM ASET™ AC (CEGR) Engine Features and Components COOLED EXHAUST GAS RECIRCULATION The ASET™ AC engine with cooled exhaust gas recirculation (CEGR) incorporates an EGR valve and cooler along with the necessary piping and mixer tube (Figure 8). This hardware is controlled via an engine electronic control unit (EECU) that regulates the amount of exhaust gas recirculated into the engine air inlet. Before passing into the air inlet, the exhaust is cooled from 1200 ° F (649 ° C) to 350 ° F (178 ° C), enhancing the effectiveness of the recirculated gases in reducing the emission of nitrogen oxides (NOx).
The primary external features that identify the AC (CEGR) engine include the following items: Cooled Exhaust Gas Recirculation (CEGR) system Variable Turbine Geometry (VTG) Turbocharger Modified cooling system with a redesigned water pump and housing Front fan and accessory drive arrangement with dual poly-V belts Increased capacity oil pan Relocation of the oil dipstick tube to the oil pan at the left side of the engine Enhanced engine electronic control unit (EECU) with increased capacity to measure and manage additional sensor inputs Page 19 DESCRIPTION AND OPERATION