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Diagnostic method and device for diagnosing an intake system of an internal combustion engine

  • US 8,353,198 B2
  • Filed: 05/20/2008
  • Issued: 01/15/2013
  • Est. Priority Date: 05/21/2007
  • Status: Active Grant
First Claim
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1. A diagnostic method for performing diagnostics on the intake tract of an internal combustion engine with exhaust gas turbocharger comprising a compressor disposed in the intake tract and a turbine disposed in an exhaust tract of the internal combustion engine for the purpose of driving said compressor, the method comprising the steps of:

  • determining a boost pressure of the compressor in a predefined operating state of the internal combustion engine,comparing the determined boost pressure to a predefined base boost pressure in the predefined operating state, anddetecting a leak in the intake tract downstream of the compressor in response to determining that the determined boost pressure is less than the predefined base boost pressure in the predefined operating state.

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