Comparison To The Conventional System; Composition - Denso 4D56 Service Manual

2.3 Comparison to the Conventional System

System
Timer
In-line Pump
VE Pump
Injection Pump (Governor)
Quantity
Control
Injection Pump (Timer)
Timing
Control
Rising Pump
Pressure
Distributor Pump
Injection Dependent upon Speed and Injection Quantity
Pressure
Control
< NOTE >
*1 : TWV: Two Way Valve
*2 : SCV: Suction Control Valve

2.4 Composition

The common rail system consists primarily of a supply pump, rail, injectors, and engine ECU.
In-line, VE Pump
High-pressure Pipe
Momentary
High Pressure
Nozzle
Governor
Q001224E
Operation Section
Common Rail System
Supply Pump
Usually High Pressure
Feed Pump SCV (Suction Control Valve)
Fuel Tank
Engine ECU, Injector (TWV)
Engine ECU, Injector (TWV)
Engine ECU, Supply Pump
Engine ECU, Rail
Engine ECU, Supply Pump (SCV)
1
Rail
Delivery Valve
Injector
Q001225E
*1
*1
*2
3
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