Diesel Exhaust Fluid Injector - EU6 Only
The Diesel Exhaust Fluid (DEF) injector is located in the exhaust system, downstream of the Diesel Particulate Filter (DPF). The DEF injector delivers a metered amount of DEF into the exhaust system, upstream of the Selective Catalyst Reduction (SCR) catalytic converter.
The DEF injector works at high pressures to provide complete atomization of the injected DEF.
This ensures the Selective Catalyst Reduction (SCR) catalytic converter performs at its optimum performance. The DEF injector is activated by a Pulse With Modulation (PWM) signal, controlled by the Powertrain Control Module (PCM). A signal duty cycle of 3.33 - 4 Hz determines the opening duration of the injector. The injector is designed to operate at a nominal operating pressure of 4.4 and 8.6 bar (64 and 125 psi). Heat, generated by the exhaust system, is dissipated through the injector by cooling fins built into the body of the injector.
For additional information, refer to: EXHAUST SYSTEM