Component description for the fuel injection valves - GF07.03-P-6010CY

ENGINE 272.911 in MODEL 204.0 up to Model Year 8

ENGINE 272.921 in MODEL 204.0 /2 up to Model Year 8

ENGINE 272.947 in MODEL 204.0 /2 up to Model Year 8

ENGINE 272.948 in MODEL 204.0 up to Model Year 8

ENGINE 272.961 in MODEL 204.0 /2 up to Model Year 8

ENGINE 272.971 in MODEL 204.0 up to Model Year 8

Location

Fig 1: Identifying Fuel Injection Valves Components Location

Courtesy of MERCEDES-BENZ USA

Injection valves are inserted below the fuel manifold into the intake ports of cylinder heads.

Design

Fig 2: Identifying Fuel Injection Valve Design

Courtesy of MERCEDES-BENZ USA

The diameter and number of outlet holes in the multi-hole nozzle (a) are adjusted to fuel requirements of the respective engine (engine performance).

Function

When the solenoid coil (5) is energized, the nozzle needle (8) is raised about 0.1 mm by the solenoid armature (6) against the force of the coil spring (13).

Sequential actuation means that each cylinder is allocated a fuel quantity (injection quantity) specifically calculated for it.

The fuel escapes through the multi-hole nozzle (a) and is sprayed into the intake port in a finely atomized spray.

Each of the injection values are directly actuated sequentially by correspondingly long mass impulses from the ME-SFI [ME] control unit (N3/10).

The voltage is supplied via the ME-SFI [ME] control unit from "circuit 87 M".