Robert Boschgmbh

Lu Chen

Eberhard Schnaibel

Michael Fey

Guido Porten

Andreas Koring

Timo Koenig

Klaus Herz

Hans Hillner

Richard Holberg

Michael Ebert

Marc Schott

The invention relates to a method and device for diagnosing deviations in a single cylinder lambda control in an internal combustion engine having at least two cylinders and an exhaust gas sensor designed as a broadband lambda sensor, wherein a pump current is evaluated by means of a pump cell and the pump current is used at least temporarily for an individual cylinder lambda control. According to the invention, a pump voltage or a pump voltage change is determined via the pump cell in addition to the pump current and the value is transmitted to a diagnosis apparatus. Deviations in the single cylinder lambda control can thus be better diagnosed without additional material expense according to the invention, which provides advantages in particular in respect of tightened rulemaking in on-board diagnosis. A preferred application of the method is the use in internal combustion engines having multi-bank exhaust systems.

Method and device for diagnosing deviations in a single cylinder lambda control

A device, a method, a computer program and a computer program product for diagnosing an internal combustion engine (), in which a first cylinder () includes a combustion chamber (), a fuel quantity and a fresh air quantity being supplied to the combustion chamber () for combustion; a torque contribution (D), generated by the combustion, of the first cylinder () in a first operating mode (B) of the internal combustion engine () being a function of the fresh air quantity supplied, and in a second operating mode (B) of the internal combustion engine () being essentially a function of the fuel quantity, wherein a first variable (L) characterizing a smooth running of the internal combustion engine () in the first operating mode (B) is ascertained, a second variable (L) characterizing the smooth running of the internal combustion engine () in the second operating mode is ascertained, the first variable (L) is compared to the second variable (L), a diagnosis of the internal combustion engine () is made as a function of the result of the comparison.

Device and method for cylinder-torque equalization of an internal combustion engine, computer program, computer program product

A method for controlling the sequence of a plurality of functions which are executable on at least two interacting devices is provided, first of the functions being implemented on a first device and the second of the functions being implemented on a second device. A system for implementing the method is provided, including an administrative unit which controls a sequence of the functions in such a manner that it prevents a first function and a second function which interfere with one another from simultaneously running.

Sequencing control of simultaneously executed forbidden pairs of first and second functions on at least two interacting devices based on priority

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Bietigheim-Bissingen, Germany

Lu Chen