Actuator , Iran

The Volvo injector bobbin is a precision electromagnetic actuator responsible for opening and closing the injector needle. This component consists of a copper winding with polyamide insulation and a movable ferromagnetic armature. The number of winding turns in Volvo diesel injector bobbins ranges from 150 to 300 turns with wire diameters of 0.1 to 0.3 millimeters. Electrical resistance of these bobbins typically falls between 0.2 and 0.5 ohms, indicating high currents of several amperes during activation. Response time of modern bobbins is less than 0.5 milliseconds to enable multiple injection events per engine cycle. The movable armature maintains an air gap of 0.05 to 0.1 millimeters relative to the fixed core for sufficient magnetic force. This magnetic force must overcome fuel pressure reaching up to 2000 bars to lift the needle.

Volvo injectors are classified into classes 1 through 6 with each bobbin having its class code laser etched on the body. This classification represents production tolerances in bobbin performance and the resulting fuel flow rate through each injector. When replacing an injector, the new bobbin class code must be programmed into the engine control unit using specialized diagnostic software. In the D5 engine family, using three different classes across different cylinders is permitted without software changes. However replacing three or more injectors to a single new class requires downloading dedicated software for that specific class. This coding precision ensures uniform engine operation and reduces vibration along with smoke during cold starts. The operating voltage for these bobbins is standard 12 volts with variable frequency control pulses from the ECU. Operating temperature range for the bobbin winding insulation is from minus 40 to plus 150 degrees Celsius.You can order and buy Actuator from Iran by contacting us through whatsaap and email.
WEBSITE: Actuator Iran