The boost pressure is determined by the rotation speed of the supercharger turbine. The turbine speed is regulated by signals from the CDL ECU
The boost pressure sensor (B5/1) transmits pressure data to the CDI control unit, which controls the turbocharger control actuator vacuum converter.
In vehicles with equipment codes (MF4)n (MF8), the boost pressure is controlled by turning the turbine guide vanes, while in Euro 3 engines, a bypass valve control is used.
Boost pressure control function (Mercedes-Benz Vito W639)
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