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

ENGINE 273.961 in MODEL 216, 221 up to Model Year 8

Shown on ENGINE 272

Fig 1: Identifying Fuel Injection Valves, Fuel Rail, Fuel Pressure Reservoir And Pressure Gauge Connection

Courtesy of MERCEDES-BENZ USA

Location

The fuel injection valves are mounted between fuel distribution tube and cylinder heads.

Task

Spraying the fuel onto the injectors in the form a finely atomized spray

Design

Fig 2: Sectional View Of Fuel Injection Valve

Courtesy of MERCEDES-BENZ USA

The diameter and number of the outlet holes (a) are adjusted to the fuel requirements of the engine.

Function

If solenoid winding is energized, the nozzle needle is raised by the solenoid armature about 0.1 mm against the force of the coil spring.

The fuel flows through an outlet opening and is sprayed onto the injectors in a finely atomized spray.

The supply voltage to the fuel injection valves is provided via fused terminal 87. Corresponding long electrical ground pulses from the ME control unit facilitate actuation.

The fuel injection valves are actuated by the ME-SFI control unit, in other words one injection valve is assigned to each cylinder which meters the quantity of fuel calculated for the cylinder.

In case of detected misfires, the actuation of the corresponding cylinder is interrupted.