Robert Boschgmbh

Christian Horn

Andreas Michalske

Bernhard Ledermann

Bernhard Matrohs

Klaus Theiss

A method for ascertaining the absolute fuel injection quantity of the injectors of an internal combustion engine including a cylinder number, the average absolute total injection quantity of the injectors being ascertained based on a run-up test in which all cylinders of the engine are active, recorded measurement data, and a predetermined engine-specific factor which is proportional to the moment of inertia of the engine when all cylinders are active, and the measurement data being essentially suited for describing the chronological progression of the engine speed during the run-up test, in particular a reached maximum engine speed, a first rate of change of the engine speed during the run-up with active injection, a second rate of change of the engine speed with inactive injection, and an idling speed of the engine.

Method for ascertaining the absolute injection quantity in an internal combustion engine and the system for this purpose

In a method for determining the lambda value with a broadband lambda sensor of an internal combustion engine, a measurement current is supplied by the lambda sensor, which measurement current is proportional to the oxygen content or rich gas content in the exhaust gas of the internal combustion engine, and the corresponding proportionality factor is determined by a thrust comparison. The thrust comparison uses the Oconcentration of dry air as reference, independent of an actually present air humidity, and the lambda value is calculated on the basis of a modified Pischinger conversion equation in which a signal supplied by a humidity sensor is taken into account.

Method and device for determining the lambda value with a broadband lambda sensor of an internal combustion engine, particularly of a motor vehicle

In a method for calibrating a measuring signal of an exhaust gas probe or a control signal of a fuel dosing device of a vehicle equipped with a hybrid drive including an internal combustion engine and at least one electric motor, the vehicle being able to be driven also by an electric motor exclusively, the gas transport for calibrating the signal of the exhaust gas probe or the fuel dosing device is induced by an engine drag operation of the vehicle, in which the internal combustion engine is dragged by the at least one electric motor while the fuel supply is deactivated.

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Esslingen, Germany

Christian Horn