4.2 Monitoring

4.2.1 Speed measurement

Bearing casing
Connecting cable
Axial bearing
Line amplifier (option)
Guide in the axial bearing
Speed transmitter
Gasket ring
Installation variant of the speed transmitter
Screw plug

The speed transmitter system for the measurement of the turbocharger speed also permits, in conjunction with the corresponding measuring instruments and/or monitoring systems (not included in the scope of delivery), a constant remote monitoring of the turbocharger speed. With continuous monitoring of the machine installation, the turbocharger speed can be used as a suitable control parameter. The line amplifier can be purchased as an optional addition to the described speed measuring system.
Possible reasons for failure of the speed indicator:

·     Defects in the speed transmitter, the connecting cable and plug to the measuring unit, in the measuring unit itself or the power supply.
·         Turbocharger damage.


Failure of the speed indicator
If the speed indication fails, it is recommended that the engine output be reduced to idling speed and the engine stopped. The cause of the failure should then be determined.


We recommend that subsequent assembly or replacement of the speed transmitter system should be carried out only by an official ABB Turbo Systems service station.

A reduction in speed of a charger can signify:

·         Damaged turbine or bearing
·         Defects in the connected pulse charging cylinders
·         Severe soiling of the turbine


Increased turbocharger speed With 4-stroke applications, heavy fouling of the turbine can also be a cause of an increase in the turbocharger speed.


It is to be observed absolutely, that the speed nBmax specified on the rating plate is not exceeded.

          1. Purpose of the manual
          2. Layout and function
          3. Correct use of the turbocharger
          4. Essential information
          5. Abbreviations and symbols
          6. Turbocharger rating plate
          1. Basic safety instructions
          2. General safety instructions
          3. Special safety instructions
          4. Safety instructions and hazard protection
          5. Warnings on the turbocharger
          1. Oil supply
          2. Inspection work
          3. Putting into operation after laying up
          1. Servicing work
          2. Monitoring
          3. Emergency mode TPL..VA
          4. Surging of turbocharger
          5. Contact with rotating parts
          6. Shutting the engine down
          1. Foreword to MaintenanceServicing work
          2. Cleaning the filter silencer
          3. Cleaning the compressor during operation
          4. Cleaning turbines and guide blades in operation
          1. Possible remedies for failures
          1. Turbocharger weights
          2. Remove the turbocharger
          3. Installing the turbocharger
          1. Module weights
          2. Remove filter silencer/air suction branch and compressor casing
          3. Removing cartridge group
          4. Axial clearance
          5. Disassembling and assembling the turbine diffuser
          6. Dismantle the VTG unit together with the gas inlet casing
          7. Installing the VTG unit and gas inlet casing
          8. Installing the cartridge group
          9. Install filter silencer/air suction branch and compressor casing
          10. Table of tightening torques
          1. Possibilities for emergency repair
          2. Fitting the cover plate
          3. Blocking the inlets and outlets
          4. Bypass the turbocharger
          1. Taking out of operation for up to 12 months
          2. Taking out of operation for more than 12 months
          1. Ordering spare parts
          2. Directory of part numbers
          3. General view of turbocharger
          4. General view of cartridge group
          5. General view of VTG unit

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