Fuel System; Overview Of Common Rail System - Kubota WSM L3560 Workshop Manual

L3560, L4060, L4760, L5060, L5460, L6060, WSM

5. FUEL SYSTEM

[1] OVERVIEW OF COMMON RAIL SYSTEM

The common rail system is an electronically controlled fuel injection device, with a supply pump (9) that
pressurizes the fuel, a rail (11) that stores the high-pressure fuel, injectors (14) that inject the fuel under high-pressure
based on solenoid operation into each cylinder and an engine ECU that controls all of these components.
The injection amount and injection timing by the injectors (14) and pressure of fuel stored in the rail are controlled
by the engine ECU (18) based on signals from each sensor (15) and instructions sent by CAN communication (19)
from the main ECU (20) on the tractor.
Therefore, fuel is injected under optimal conditions at all times enabling suppressing of that which is a
characteristic of diesel engines, generation of black smoke on start up and under acceleration achieving reduction in
exhaust gas and higher output power.
1-M6
ENGINE
(1) Fuel Tank
(2) Water Separator
(3) Electromagnetic Pump
(4) Check Valve
(5) Fuel Sub Tank
(6) Fuel Cooler
(7) Feed Pump
(8) Fuel Filter
(9) Supply Pump
(10) Pressure Limiter
(11) Rail
(12) Injection Pipe
(13) Rail Pressure Sensor
(14) Injector
(15) Sensor
(16) SCV (Suction Control Valve)
(17) Fuel Cam Shaft
(18) Engine ECU
(19) CAN Communication
(20) Main ECU
(a) High Pressure Circuit
9Y1210824ENM0007US0
KiSC issued 03, 2016 A