SFI SYSTEM


  1. CONSTRUCTION


    1. The 2UR-GSE engine is provided with 2 injector drivers (EDU: Electronic Driver Units) to control the injectors. One injector driver (EDU) controls the fuel injector assemblies (for direct injection) of the number 1, 4, 6, and 7 cylinders and the fuel pump spill control valve (for high-pressure) on the left bank. The other injector driver (EDU) controls the fuel injector assemblies (for direct injection) of the number 2, 3, 5, and 8 cylinders and the fuel pump spill control valve (for high-pressure) on the right bank.

    2. The injector drivers (EDUs) each use an internal DC/DC converter that converts 12 V into 50 V enabling them to operate the fuel injectors under high-pressure conditions. The DC/DC converter provides the injector drivers (EDUs) with a high-voltage, quick-charging system (the "quick-charging system" refers to the ability of the injector drivers (EDUs) to "recharge" their internal high-voltage power source).

    3. The ECM constantly monitors the injector drivers (EDUs) and stops the engine if an abnormal condition is detected.