Method for operating a drive unit for a motor vehicle and corresponding drive unit

The method allows for precise fuel quantity adaptation during load changes in motor vehicle drive units by using crankshaft acceleration to adjust fuel quantities, addressing inefficiencies and discomfort in existing methods.

DE102020118173B4Active Publication Date: 2026-07-02AUDI AG
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Patent Information

Application Number
DE102020118173
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-07-09
Publication Date
2026-07-02
Estimated Expiration
2040-07-09

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Abstract

Method for operating a drive unit for a motor vehicle, which has an internal combustion engine with a crankshaft and a vehicle transmission whose input shaft is connected to the crankshaft for drive purposes, wherein a fuel quantity adaptation is temporarily carried out to adjust a quantity of fuel supplied to a cylinder of the internal combustion engine, characterized in that the fuel quantity adaptation is carried out during a load change within the drive unit by controlling a fuel injector to introduce a target quantity of fuel into the cylinder, wherein a resulting acceleration of the crankshaft counteracting the load change is detected and used to calculate an actual quantity of fuel supplied to the cylinder.where a difference between the actual fuel quantity and the target fuel quantity is used to adjust the amount of fuel supplied to the cylinder of the internal combustion engine.
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Citation Information

Patent Citations

  • fuel injection control device and learning method of fuel injection deviation

    DE102006035438A1

  • Modulated enhanced control signal determining method for magnetic valve injector of internal combustion engine, involves determining modulated control signal based on actual control signal when actual performance satisfies end condition

    DE102007057144A1

  • device for learning a deviation from a target fuel injection characteristic of an injector

    DE102008040099A1

  • Method for adapting an injection quantity

    WO2014173742A1