Denso 4M41 - Comparison to the Conventional System; Composition

Operation Section
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3
2.3 Comparison to the Conventional System
< NOTE >
*1 : TWV: Two Way Valve
*2 : SCV: Suction Control Valve
2.4 Composition
z The common rail system consists primarily of a supply pump, rail, injectors, and engine ECU.
In-line, VE Pump Common Rail System
System
Injection
Quantity
Control
Pump (Governor) Engine ECU, Injector (TWV)
*1
Injection
Timing
Control
Pump (Timer) Engine ECU, Injector (TWV)
*1
Rising
Pressure
Pump Engine ECU, Supply Pump
Distributor Pump Engine ECU, Rail
Injection
Pressure
Control
Dependent upon Speed and Injection Quantity Engine ECU, Supply Pump (SCV)
*2
Q001224E
High-pressure Pipe
Momentary
High Pressure
Nozzle
Governor
Timer
In-line Pump
VE Pump
Q001225E
Rail
Usually High Pressure
Supply Pump
Injector
Feed Pump
SCV (Suction Control Valve)
Delivery Valve
Fuel Tank