24 ENGINE SYSTEMS The EGR system is closed loop control, using EGR position signals. Exhaust piping Muffler and catalytic converter dependent on application The EGR drive module receives the desired EGR valve position from the ECM across the CAN 2 datalink to activate the EGR valve for exhaust gas recirculation. The EGR drive module provides feedback to the ECM on the valve position, interprets the ECM command, and sends the command using three pulse width modulated signals to the DC motor. Catalyzed Diesel Particulate Filter (CDPF) if equipped. The exhaust system removes exhaust gases from the engine.
Exhaust gases exit from exhaust ports, through exhaust valves, and flow into the exhaust manifolds. Expanding exhaust gases are directed through the exhaust tubes. The right exhaust tube directs some exhaust gases into the Exhaust Gas Recirculation (EGR) cooler. Exhaust gases flowing into the VGT drive the turbine wheel. Exhaust gases exit the VGT and flow into the exhaust piping, through the muffler and catalytic converter or CDPF, and out the discharge pipe to the atmosphere. Exhaust System The exhaust system includes the following:
Exhaust valves Exhaust manifolds Turbocharger EGES295-2 Read all safety instructions in the "Safety Information" section of this manual before doing any procedures. Follow all warnings, cautions, and notes. ©2006 International Truck and Engine Corporation