Bajaj Dominar 400 Service Manual page 54

2
Sistema de Combustible y EMS
Funcionamiento del Sistemas
Fuel Injector
Construcción
return spring Electrical
O-ring inlet
manifold
Functioning
The fuel injector supplies fuel sprayed from the injector pin which is located in the intake manifold.
The injector has nozzles that are opened and closed by a solenoid (coil) in the injector body. When the winding is energized, the
armature is attracted and become magnetically compresses the spring which lifts the valve needle. Thus the pivot atomize the
fuel into a fine spray with a
pressure close to 2.5 bar (36 lbf / in2) until the ECU cuts the electric solenoid signal.
The inward movement of the injector is restricted only <0.1mm. Also the period when the injector is open is very short (1.5 to 10
milliseconds).
Thus, the opening and closing time is critical to meter fuel accurately.
The fuel spray mixes with the incoming air since both move toward the intake valve giving a precise mixture for combustion.
Bajaj Auto International Business
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Fuel injector
Function
Injects fuel into the intake manifold until the electrical signal of the
solenoids is cut by the ECU.
Connection
Armature
Valve needle
Fuel supply
O-ring seal
Filter
Coil
Washer
Pivoting protective cover
Pivot