Injector; Outline Of Injector; Structure Of Injector - Kubota D1803-CR-E4 Workshop Manual

4. ENGINE

3.13 Injector

3.13.1 Outline of injector

The injector injects high pressure fuel from the rail into
the combustion chamber.

3.13.2 Structure of injector

The injector is made up of a solenoid, command piston,
and nozzle body and the like.
(1) Valve ball
(2) Discharge orifice
(3) Control chamber
(4) Valve body
(5) Command piston
(6) Nozzle body
(7) Needle valve
(8) Valve spring
(14) ID code
4-26
(9) Solenoid
(10) Two way valve (TWV)
(11) Suction orifice
(12) Nozzle spring
(13) Nozzle nut
(A) To fuel tank
(B) From rail
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
Wiring diagram
(15) Injector
(16) Rated amperage circuit
(17) High-voltage generating cir-
cuit
MECHANISM
3. Fuel system
(18) Control circuit
(19) Engine ECU
KiSC issued 12, 2018 A