Diesel Exhaust Fluid (Def) Injector

The DEF injector is located in the exhaust system downstream of the DPF and it is secured to the SCR exhaust pipe with a clamp. Due to the position of the injector on the SCR exhaust pipe, the DEF is injected axially to the exhaust gas flow direction ensuring the DEF is mixed well and distributed evenly within the exhaust gas. The DEF injector consists of an injector and a passive cooling heat sink, this is to protect the injector from overheating due to the high exhaust temperatures.

The DEF injector works at high pressures to obtain the complete atomization of the injected DEF, this ensures the SCR catalytic converter is working to its optimum performance. The DEF injector is controlled by the PCM with PWM signals.