Injection timing device function - GF07.12-P-3139-01H

Engine 605, 606 

As engine speed increases, the flyweights (40/4) on the curved track at the segment flange (40/2) move slowly outwards against the tension of the compression springs (40/10). The weights rotate the segment flange (40/2) of the camshaft (10/1) of the IFI [ERE] inline injection pump in the "ADVANCE" direction, thereby causing the flange to move ahead the drive hub (40/9) of the sprocket (40/6).

Fig 1: Identifying Injection Timing Device Function

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

At engine speeds of 1500 rpm and higher, start of delivery is moved in the "ADVANCE" direction in order to compensate for ignition lag.

The advance angle is at most 23° crank angle (CKA [KW])

Fig 2: Identifying Advance Angle Of Injection Pump Timing Device

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.