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Boosted engine system of a motor vehicle

  • US 10,458,317 B2
  • Filed: 10/06/2017
  • Issued: 10/29/2019
  • Est. Priority Date: 10/21/2016
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • responsive to a demanded torque being above a threshold while providing boosted air at a first pressure to an engine via a turbocharger compressor, operating an electric compressor via an electronic controller, wherein the electric compressor is arranged in parallel with the turbocharger compressor and wherein the electric compressor is fluidly disconnected from the engine, to increase a second pressure in a recirculation circuit around the electric compressor;

    wherein the recirculation circuit comprises an electrically controlled first valve arranged to connect at a position between a shut-off valve and an outlet of the electric compressor; and

    responsive to the second pressure reaching the first pressure, fluidly connecting the electric compressor to the engine.

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