Kubota D1803-CR-E4 - Function of Injection Pipe; Rail Assembly; Function of Rail Assembly; Outline of Rail Assembly

3.11.3 Function of injection pipe
Injection pipes
connect the supply pump and rail as
well as the rail and injectors.
3.12 Rail assembly
3.12.1 Outline of rail assembly
The rail stores high pressure fuel and delivers it to each
of the injectors.
3.12.2 Structure of rail assembly
The rail assembly is made up of a rail body, rail
pressure sensor, and pressure limiter
.
(1) Rail pressure sensor
(2) Rail body
(3)
Pressure limiter
Wiring diagram
(4) Terminal 5V
(5) T
erminal signal
(6) Terminal ground
(7) +5 V
(8) Engine ECU
(a) Rail pressure sensor con-
nector
3.12.3 Function of rail assembly
The rail assembly stores high pressure fuel fed from
the
supply
pump and while retaining the pressure,
delivers fuel to the injectors for each cylinder.
The pressure of the fuel in the rail is detected by the rail
pressure sensor, and optimal feedback control is
provided for the engine speed and load.
This greatly improves the ability to raise the pressure at
low speed and enables high-pressure injection from low
speed ranges.
4. ENGINE
MECHANISM
3. Fuel system
4-24
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
KiSC issued 12, 2018 A