smart Workshop Repair Guides

Smart Workshop Service and Repair Manuals

Fuel Injector|Service and Repair > < Fuel Injector|Description and Operation
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1

Fuel pressure fitting

2

Sealing ring (O-ring)

3

Fuel connector to fuel rail

4

Internal transfer tube

5

Adjusting sleeve

6

Housing

7

Coil spring

8

Plastic washer

9

Filter

10

Outlet hole

11

Nozzle needle

12

Armature

13

Solenoid winding

14

Electrical connection

Function

When the solenoid coil is energized, the nozzle needle is raised about 0.1 mm by the solenoid armature against the force of the coil spring.
Fuel escapes through the outlet hole and is sprayed into the intake port in a finely atomized spray.

Fuel injection valves are actuated by mass impulses from the ME-SFI [ME] control unit (N3/10).

Fuel Injector|Service and Repair > < Fuel Injector|Description and Operation