Intake Pressure Control Task/Function

Model 210.020 except (USA)






Model 210.020 (USA)


Task
Regulating intake manifold pressure.

Function
The intake pressure is regulated as a function of a map in the IFI control module (N3/7) as soon as the following conditions are met:
- coolant temperature between 60 °C and 110 °C
- battery voltage 11 - 14 V
- fuel rack travel < 9 mm
- engine speed < 3500 rpm

The pressure-regulating flap vacuum transducer (Y31/2) is actuated with a variable current by the IFI control module (N3/7) on the basis of the input signals and as a function of the intake manifold pressure, measured by the pressure sensor (B28).
The pressure-regulating flap vacuum unit (102) is pressurized as a result with an exactly measured vacuum. The vacuum unit sets the pressure-regulating flap in the mixture housing (103) accordingly, as a result of which a defined intake manifold pressure is achieved.
The actuating current of the pressure-regulating flap vacuum transducer (Y31/2) is altered for as long as necessary until the intake manifold pressure required by the control module has been obtained.