gf1510d2000h

Component description for spark plugs

Type gf · topic 15.10 · version 0101 · 2009-02-18

Applies to: ENGINE 272.979 in MODEL 906 ENGINE 272.978 in MODEL 639

Where it sits

Function group 1 Engine › 15 Electrical system - engine › 15.10 Ignition system, general — Series 639 · Series 906

Also applies to engines/gearboxes: 272 978, 272 979

GF15.10-D-2000H

Component description for spark plugs

20.1.09

ENGINE 272.979 in MODEL 906

ENGINE 272.978 in MODEL 639

Component description for spark plugs

P15.10-2094-02

Shown on model 906

R4 Spark plug

Location

In the cylinder head, each cylinder has a spark plug located in the center between the engine valves.

Task

The compacted fuel/air mixture is combusted by sparks between the electrodes according to actuation by the ME-SFI [ME] control unit (N3/23).

Design

All spark plug characteristics are defined by type symbols provided by the manufacturer (e.g. heat rating, seat shape, thread, width across flats, electrode material, spark position).

Function

The ignition voltage passes from the directly plugged in ignition coils: ignition coils for cylinder 1 (T1/1), ignition coils for cylinder 2 (T1/2), ignition coils for cylinder 3 (T1/3), ignition coils for cylinder 4 (T1/4), ignition coils for cylinder 5 (T1/5) and ignition coils for cylinder 6 (T1/6) to the respective spark plug and causes the arcing in the air gap between the center and ground electrode.

Spark plug table, see IS, Group 15.