Turbocharger Systems

🧠 Part of the TuningBot ECU Knowledge Base — in-depth documentation on ECU logic, maps, emissions systems and safe calibration methods.

Turbocharger systems use exhaust energy to compress intake air, increasing air density and allowing more fuel to be burned for higher power output. The ECU manages boost pressure via wastegate, Variable Geometry Turbine (VGT), or compound turbo configurations.

Visão geral

The turbine converts exhaust energy into rotational energy that drives the compressor. The ECU controls boost by managing how much exhaust bypasses the turbine (wastegate) or by adjusting turbine geometry (VGT).

Turbo Types

  • Wastegate turbo — exhaust bypass for boost control
  • VGT/VNT — variable vanes adjust turbine characteristics
  • Twin-scroll — separated exhaust pulses for better response
  • Compound/Sequential — multiple turbos for broad power band

ECU Control

  • Wastegate duty cycle
  • VGT vane position
  • Boost pressure target
  • Turbo speed limiting
  • Compressor surge avoidance

Calibration Considerations

  • Larger turbos require fueling and timing adjustments
  • VGT calibration critical for response
  • Compound systems need coordinated control

Diagnóstico

  • Boost deviation faults
  • VGT position faults
  • Turbo speed overshoot
  • Actuator faults

Best Practices

  • Allow proper cool-down after hard driving
  • Use quality oil and change frequently
  • Inspect for shaft play during maintenance

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