Fuel Injector Classification

The fuel injectors used in this common rail injection engine are manufactured with various tolerances. Each fuel injector is classified based on its particular tolerance range. This injector classification is programmed into the ECM. The ECM incorporates different fuel timing and fuel quantity maps for each type of injector class. In doing this, the ECM is able to improve fuel injector control to enhance engine performance and reduce emissions outputs. Injector classification programming is performed using the DRBIII® whenever a fuel injector is replaced.