Robert Boschgmbh

Dieter-Andreas Dambach

Rainer Frank

Georg Mallebrein

Juergen Schiemann

Manfred Mezger

Rudi Mayer

Gudrun Menrad

Hans Hillner

Erich Schneider

Martin Klenk

Holger Bellmann

Rainer Bone

Jorg Lange

Holger Bellman

Heinz Mohl, Legal Representative

J&uuml;rgen Wolf

A control unit for a system and a method of operating a control unit have modules that are activated. Before activation of a certain module, inquiries are made to detect cross-dependencies with other modules that have already been activated. To do so, a first storage device and a second storage device containing this information are provided. A scheduler prevents modules which interfere with one another from being activated simultaneously.

System and method for a control unit with a scheduler preventing simultaneous activation of modules from interference

A fault diagnostic device for monitoring and detecting faults in technical functions, in particular in technical functions of a motor vehicle, includes a plurality of monitoring devices for monitoring technical functions, whether they have a fault or not. The fault diagnostic device also includes a storage device for storing (data concerning) direct mutual dependencies of the functions to be monitored, in the form of a matrix representation in the logical YES/NO form. Furthermore, the fault diagnostic device includes a processing device for determining the capacity for validation of faults in corresponding technical functions to be detected in the monitoring, in view of the matrix representation; for controlling the monitoring devices for carrying out the monitoring activities; and, assuming the capacity for validation, for validating the faults to be detected in the monitoring.

Fault diagnostic device and method

Device for detecting a fuel supply system leak during an engine

The invention relates to a method for monitoring blowing in secondary air to the exhaust gas in an internal combustion engine equipped with a measuring sensor for detecting the oxygen content in the exhaust gas. The method is based on the reaction of the measuring sensor to the switch in of the secondary air. The quantity of the air inducted by the engine is increased when the secondary air is supplied to the exhaust gas.

Method for monitoring the supply of secondary air to the exhaust gas of

The invention is directed to a method of detecting and documenting exhaust-gas relevant malfunctions of a vehicle equipped with an internal combustion engine utilizing onboard equipment. Malfunctions are detected by a sensor device and evaluated in a circuit unit. The malfunction is displayed by a warning lamp (fault announcement) and is stored in a fault memory. A pressure measurement in the fuel loop is made and the output as well as the storage of the fault announcement is made in dependence upon the measured pressure. This is done to differentiate fault announcements based on a fuel tank run to empty.

Method of detecting and documenting exhaust-gas relevant malfunctions of

In a method and device for monitoring a secondary-air system, a first value is determined which characterizes the secondary air stream blown by the secondary-air system into the exhaust-gas channel of an internal combustion engine. On the basis of this first value, the functioning of the secondary-air system is judged. If the first value lies within a predeterminable interval, it is concluded that the secondary-air system is operating properly. If the first value, on the other hand, lies outside of this predeterminable interval, it is concluded that a malfunction is present. The first value is determined from a second value which characterizes the stream of air fed to the internal combustion engine, from the air/fuel ratio of the mixture drawn in by the internal combustion engine, and from the air/fuel ratio prevailing in the exhaust-gas channel downstream of the place of introduction of the secondary-air line.

Method and device for monitoring a secondary-air system of a motor

A method for monitoring a system for delivering secondary air to an exhaust tube of an internal combustion engine. In the method a secondary air pump is switched on and builds up a pressure on the inlet side of a blocking valve which is normally closed and not being acted upon. The blocking valve has a valve closing member that is acted upon by a predetermined closing force of an elastic element. If the secondary air quantity pumped by the secondary air pump reaches a certain minimum air quantity and pressure, then with the then-opened blocking valve, a lambda sensor disposed in an exhaust tube detects a change in the lambda value in the exhaust tube that exceeds a predetermined threshold value. The method is suitable for monitoring the function of a system for delivering secondary air to the exhaust tube of an internal combustion engine.

Method for monitoring a system for delivering secondary air to the

An apparatus for monitoring a system for delivering secondary air to an exhaust tube of an internal combustion engine. In the method and apparatus, a secondary air pump is switched on and builds up a pressure on the inlet side of a blocking valve which is normally closed and not being acted upon. The blocking valve has a valve closing member that is acted upon by a predetermined closing force of an elastic element. If the secondary air quantity pumped by the secondary air pump reaches a certain minimum air quantity and pressure, then with the then-opened blocking valve, a lambda sensor disposed in an exhaust tube detects a change in the lambda value in the exhaust tube that exceeds a predetermined threshold value. The apparatus is suitable for monitoring the function of a system for delivering secondary air to the exhaust tube of an internal combustion engine.

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Stuttgart, Germany

Dieter-Andreas Dambach