Patent ID: 8239120
Filing Date: 2012-08-07
Classification: F02D

Abstract:
1. A device for operating an internal combustion engine, comparing: a triggering component which controls an injection of fuel for combustion in a combustion chamber of the internal combustion engine; a selection component which predefines a first fuel quantity to be injected; a first ascertaining component which ascertains a first value of the first quantity of the internal combustion engine, which allows a conclusion to be drawn on the behavior of an output quantity of the internal combustion engine, the first ascertaining component adapted to ascertain the first value of the first fuel quantity which results from a fuel injection according to the first fuel quantity to be injected wherein the triggering component is adapted to change the fuel quantity to be injected in relation to an air quantity to be supplied to the internal combustion engine based on the first fuel quantity to be injected, and the first ascertaining component ascertains a second value of the first fuel quantity which results due to a change in the fuel quantity to be injected; a comparator which compares the first value of the first fuel quantity with the second value of the first fuel quantity; and a second ascertaining component which ascertains, as a function of the comparison result, a value for an air/fuel mixture ratio for the first fuel quantity to be injected prevailing prior to the change in the fuel quantity to be injected, independently of a measured value of a sensor measuring the oxygen level in the exhaust gas.