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Home >> Mercedes Benz >> 1982 >> 300D (123.133) L5-3.0L DSL Turbo (617.952) >> Repair and Diagnosis >> Powertrain Management >> Fuel Delivery and Air Induction >> Turbocharger >> Description and Operation >> Operation Engine Overload Protection

Operation Engine Overload Protection

OPERATION ENGINE OVERLOAD PROTECTION





Engine overload protection




The boost air pipe is provided with a pressure switch (3) At a boost pressure above 1.1 ± 0.15 bar gauge pressure, the pressure switch will close and will connect minus (negative) to changeover valve (2), which is connected to plus (positive) via terminal 15. The changeover valve interrupts the connection boost air pipe to ALDA aneroid capsule on injection pump. The aneroid capsule is connected to atmosphere and the injection fuel quantity is thereby reduced. If the pressure drops to below 1.1 ± 0.15 bar gauge pressure, the pressure switch will again interrupt the minus (negative) connection and will connect the ALDA aneroid capsule again to boost air pipe.

Model 123:




Model 126:




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