Robert Boschgmbh

Andrea Matteucci

Reinhard Hoss

Daniel Strack

Gerhard Haaga

Karl Stengel

Michael Neuendorf

Christian Bald

In a method for detecting a deviation of a compression pressure of one cylinder from that of another cylinder of an internal combustion engine having at least two cylinders, the rotational speed of a crankshaft of the internal combustion engine is reduced from a starting rotational speed to a target rotational speed; the actual rotational speed is detected; a curve of a change of the actual rotational speed per angle unit of the crankshaft is determined as a curve of a rotational speed gradient; the curve of the rotational speed gradient is subjected to order analysis; and a deviation of the compression pressure of one cylinder from that of another cylinder is detected when an amplitude of a selected order lies above a permissible threshold value.

Method for detecting a deviation of a compression pressure of one cylinder from that of another cylinder of an internal combustion engine

A calibration device is described for calibrating a scatterometer, which is designed in particular for measuring a particle concentration in exhaust gases of motor vehicles. The calibration device has at least one scattering body which emits scattered light having a defined intensity and distribution when irradiated with a light beam, the scattering body having an emission surface for the scattered light, to which is assigned at least one light sensor for detecting the scattered light exiting the emission surface. A screening body having at least one screen opening through which the scattered light exits in the direction of the at least one light sensor is assigned to the emission surface of the scattering body.

Device for calibrating a scatterometer

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Stuttgart, Germany

Andrea Matteucci