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Method and device for controlling an internal combustion engine

  • US 9,599,043 B2
  • Filed: 09/21/2012
  • Issued: 03/21/2017
  • Est. Priority Date: 10/06/2011
  • Status: Active Grant
First Claim
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1. A method for stopping an internal combustion engine, comprising:

  • supplying an air flow via an air metering device of the internal combustion engine;

    after a stopping requested is ascertained;

    reducing the air flow supplied by the air metering device after the stopping request has been ascertained;

    ascertaining an undershoot point in time, the undershoot point in time being a point in time at which an ascertained speed of the internal combustion engine falls below a predefinable speed threshold value; and

    after the undershoot point in time;

    ascertaining a coasting speed of the internal combustion engine, the coasting speed being a speed of the internal combustion engine at a point in time when an intake cylinder of the internal combustion engine is at a top dead center following the underfoot point in time;

    selecting a degree of opening of the air metering device as a function of the coasting speed of the internal combustion engine; and

    increasing the air flow supplied via the air metering device by adjusting the air metering device to the selected degree of opening;

    wherein the predefined speed threshold is selected in such a way that an intake cylinder no longer enters a power stroke after the increase of the supplied air flow until the internal combustion engine is at a standstill.

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