ТОПЛИВНАЯ СИСТЕМА


  1. CONSTRUCTION


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

    2. This injector mainly consists of the solenoid valve, nozzle needle, valve bolt, and 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.

      B0040ALC01
      *1 Solenoid *2 Piston
      *3 Nozzle Needle - -
      *a Injector Compensation Value *b DMC

      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. When electrical current is applied to the solenoid coil, it pulls the solenoid valve up.

    2. The orifice of the control chamber opens, allowing the fuel to flow out.

    3. The fuel pressure in the control chamber drops.

    4. Simultaneously, fuel flows from the orifice to the bottom of the piston and raises the piston up (to enhance response).

    5. As a result, the piston raises the nozzle needle to inject fuel.

      B0040D5C01
      *1 Solenoid Coil *2 Solenoid Valve
      *3 Control Chamber *4 Piston
      *5 Nozzle Needle - -
      *a Fuel - -