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Method and arrangement for controlling a self-igniting internal combustion engine

  • US 5,131,371 A
  • Filed: 09/07/1990
  • Issued: 07/21/1992
  • Est. Priority Date: 09/07/1989
  • Status: Expired due to Term
First Claim
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1. A method for controlling a self-igniting internal combustion engine having a plurality of cylinders and sensor means for measuring at least one of the variables including exhaust gas temperature, lambda value, engine speed and engine torque, an electronic closed-loop control unit for forming a quantity signal for metering fuel and an open-loop control unit for driving an actuator for a specific cylinder, the actuator determining the quantity of fuel injected by a pump element into a cylinder, the method comprising the steps of:

  • activating corrective means under specific conditions to make ready corrective vales specific to the cylinders for equalizing the cylinders;

    sequentially reducing or interrupting the fuel metered to each one of the cylinders and measuring the reaction on the one variable measured by said sensor means to determine the amount by which the measured variable is reduced;

    utilizing said corrective means to compute a corrective value for each one of said cylinders in dependence upon the amount determined for the cylinder;

    permanently storing the corrective values; and

    ,causing said open-loop control unit to charge said actuators with metering signals in dependence upon said quantity signal and said corrective values.

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