ТОПЛИВНАЯ СИСТЕМА


  1. CONSTRUCTION


    1. A piezo type injector is used to precisely control the fuel injection volume and timing.

    2. This injector mainly consists of the piezo actuator, nozzle needle, valve bolt, amplifier piston and valve piston.

    3. An injector compensation value and Data Matrix Code (DMC) containing encoded characteristics of the injector are printed on each injector.

    4. The injector compensation value and DMC contains various pieces of information regarding the injector, such as model code, and injection volume correction.

      A00XRIMC01
      *1 Amplifier Piston *2 Valve Bolt
      *3 Nozzle Needle *4 Piezo Actuator
      *5 Valve Piston *6 DMC
      *a Injector Compensation Value - -

      Tech Tips


      • If an injector or the ECM is replaced, the injector compensation value can be entered in the ECM via the Global TechStream (GTS).


        • When an injector is replaced, enter the injector compensation value of the replaced injector only.


        • When the ECM is replaced, enter the injector compensation value of all injectors. The proper compensation will be made so that the injection volume precision prior to the replacement will remain unchanged.

      • The DMC, which requires a special scan tool, is not used at Toyota dealers.

  2. OPERATION


    1. Injector: Needle Opening (During Injection)


      1. The actuator is activated.

      2. The valve bolt opens (moves downwards) due to actuator lift.

      3. Pressure of the nozzle needle tip decreases.

      4. The nozzle needle opens (moves upwards).

    2. Injector: Needle Closing (While Stopped)


      1. The actuator is deactivated.

      2. The valve bolt closes (moves upwards) due to the valve spring.

      3. Pressure of the nozzle needle tip increases.

      4. The nozzle needle closes (moves downwards).

        A00XREBC01
        *1 Piezo Actuator *2 Amplifier Piston
        *3 Valve Piston *4 Valve Bolt
        *5 Nozzle Needle *6 Fuel
        *a During Injection *b While Stopped