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System for estimating absolute boost pressure in a turbocharged internal combustion engine

  • US 6,698,203 B2
  • Filed: 03/19/2002
  • Issued: 03/02/2004
  • Est. Priority Date: 03/19/2002
  • Status: Active Grant
First Claim
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1. System for estimating absolute boost pressure in a turbocharged internal combustion engine, comprising:

  • a turbocharger having a compressor defining a inlet and an outlet fluidly coupled via an intake conduit to an intake manifold of an internal combustion engine;

    a pressure sensor producing a pressure signal indicative of pressure of air entering said compressor inlet;

    a temperature sensor producing a temperature signal indicative of temperature of air entering said compressor inlet;

    a first speed sensor producing a first speed signal indicative of engine rotational speed;

    a second speed sensor producing a second speed signal indicative of rotational speed of said turbocharger; and

    a control computer estimating absolute boost pressure within said intake conduit as a function of said first and second speed, pressure and temperature signals.

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