Troubleshooting on the turbocharger: Notes

For charged engines, turbochargers are of significant importance to the power development. The turbochargers deliver the charging pressure that is required by the engines. Depending on the system (one-phase or multi-phase), one or more turbochargers are installed. However, the function of the turbocharger greatly depends on the proper function of other components in the periphery.

This document describes the sources of fault on the actual turbocharger as well as the factors influencing and causing faults in the periphery.

The following figures show examples of the schematic structure of one-stage or two-stage systems with the required actuators.

Fig 1: Turbocharger Schematic Diagram (One-Phase System)

Courtesy of BMW OF NORTH AMERICA, INC.

One-phase system

Fig 2: Turbocharger Schematic Diagram (Two-Phase System)

Courtesy of BMW OF NORTH AMERICA, INC.

Two-phase system

Fig 3: Identifying Turbocharger Components

Courtesy of BMW OF NORTH AMERICA, INC.

Sectional view of turbocharger