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ECM controls injection amount and injection timing through Electrical control injector in order to control system pressure which is required for measuring and injection of diesel fuel. Injectors on CRDi injects atomized fuel with highly pressurized directly into the combustion chamber corresponding to fuel amount ECM decided. Fuel injected into combustion chamber generates power through the explosion.

There are 2 different fuel injection on the S engine. One is 2 time pilot injection for reducing explosion noise during fuel control, another is main injection for generating power. In addition, those are controlled independently by ECM and injection time (injection amount) as well. Injector is newly adopted new technology. that are hydraulic coupler which transfer operating force of actuator as quickly as possible and PIEZO actuator what is operating response better than solenoid actuator. Both PIEZO actuator and hydraulic coupler realized to increase the fuel pressure to 250 ~ 1600bar. That makes high combustion efficiency resulting to reduced smog and improved engine power and fuel efficiency.

P0611 is set when the problems of more than 2 injector circuits are detected thus, it is difficult to find abnormal injector. Check "Circuit Inspection" of all injectors .