Denso-Common Rail System – Fuel injectors
A Fuel injector nozzle
B Hydraulic servo system
C Solenoid valve
1 Combustion chamber seal
2 Electrical connection – solenoid valve
3 High pressure fuel line connection
NOTE: The combustion chamber sealing rings must not be reused.
The exact procedure for the correct installation of the fuel injectors can be found in the current service literature.
Start of injection and injected fuel quantity are adjusted via the fuel injectors.
In order to achieve the optimal injection timing and precise injected fuel quantity, special fuel injectors with a hydraulic servo system and electrical actuator unit (solenoid valve) are used.
The injectors are actuated directly by the PCM. The PCM specifies the injected quantity and the injection timing.
The fuel injectors are divided into different function blocks:
• injector nozzle,
• hydraulic servo system,
• solenoid valve.
Operating principle of the fuel injectors The operating principle of the fuel injectors is similar to that of the fuel injectors in the Bosch common rail system.