BOOST PRESSURE CONTROL OPERATION[MZ-CD 1.6 (Y6)]

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•  On a variable turbocharger, the boost pressure is regulated by adjusting the guide vanes. This means that optimum boost pressure can be set for any operating condition.
•  The actual boost pressure value is measured by the MAP sensor. The set value depends on the speed and injected fuel quantity, as well as on the BARO.
•  When a control deviation occurs, the guide vanes of the variable geometry turbocharger are adjusted via the VBC solenoid.
•  If the boost pressure control system should malfunction, engine power is reduced via the fuel metering system.
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1
VBC solenoid valve
2
MAP sensor
3
Charge air cooler
4
VBC valve actuator
5
Turbocharger
6
Vacuum chamber (High power-Euro 4)
7
Air cleaner
8
Vacuum hose (High power-Euro 4)
9
Vacuum hose (Standard power-Euro 4)