Robert Boschgmbh

Matthias Kuentzle

Uwe Neumann

Andreas Koring

Kersten Wehmeier

Andreas Pape

Richard Holberg

Joerg Kieser

Siyun Chu

Achim Jung

Martin Sternke

A method and a device for determining the oxygen storage capacity of an emission control system in an exhaust duct of an internal combustion engine. In a first phase, the internal combustion engine being operated using an air-fuel mixture having a rich air-to-fuel ratio, and in a second phase, the engine being operated at a lean air-to-fuel ratio; and an oxygen storage capacity of the emission control system being determined from an oxygen input into the emission control system during the second phase; and/or in order to determine a hydrocarbon gas storage capacity, the internal combustion engine being operated during the first phase at a lean air-to-fuel ratio, and operated in the second phase at a rich air-to-fuel ratio; and the hydrocarbon gas storage capacity being determined from the oxygen discharge from the emission control system during the second phase.

Method and device for determining the oxygen storage capacity of an emission control system

A method for diagnosing and/or adapting at least one system () of a device () is described, which method comprises the following steps:

Method for diagnosing and/or adapting at least one system of a device

A device and a method are provided for diagnosing a technical apparatus which is particularly developed as an internal combustion engine. When specified states of the technical apparatus are present, the means of diagnosis are activated, and when at least one of the specified technical states is no longer present, the means of diagnosis are deactivated. Upon the deactivation, information is stored that identifies which technical state is no longer present.

Device and method for diagnosing a technical apparatus

A method for checking the operational capability of a fuel tank ventilation valve () of a fuel tank ventilation system of a motor vehicle with an internal combustion engine () having an intake manifold pressure-based detection of filling levels is thereby characterized in that the fuel tank ventilation valve () is selectively activated to open or close and in correlation to this the operational capability of the fuel tank ventilation valve () is suggested from the thereby resulting intake manifold pressure (p).

Method for checking the operational capability of a fuel tank ventilation valve

In a method for operating a drive unit, for at least one operating quantity of the drive unit, a deviation from an initial value is represented by an adaptation value, which adaptation value is determined at various times. In an extreme value storage unit, a first adaptation value, determined at a first point in time, is stored. A second adaptation value, determined at a second point in time after the first point in time, is compared with the first adaptation value stored in the extreme value storage unit to determine whether the second adaptation value exceeds the first adaptation value in a prespecified direction. In this case, the extreme value storage unit is overwritten by the second adaptation value.

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Schwieberdingen, Germany

Matthias Kuentzle