5.5.5 Injection control unit
For each cylinder there is one injection control unit (ICU) installed on the fuel rail.
The ICU changes the electrical signal from the ECS to the required fuel quantity for the
injection.
The solenoid valve (002, Figure 5-37) opens the servo oil supply and thus moves the piston in
the sleeve (003) of the ICU. This releases the fuel through the connection (001) to the injection
valves. When the solenoid valve closes, the piston moves back and thus stops the fuel supply.
Fig 5-37 Injection control unit (ICU)
Legend
001 Connection to HP pipe 003 Sleeve
002 Solenoid valve
X92DF
AA00-5564-00AAA-043A-A
Operation Manual Injection control unit
Winterthur Gas & Diesel Ltd.
- 214 - Issue 002 2020-08
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