Avl List Gmbh

Avl Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik M.b.h.

Harald Arnulf Philipp

Ernst Winklhofer

Heribert Kammerstetter

Otfried Derschmidt

Horst Tschetsch

Anton Plimon

Alois Hirsch

Heribert Fuchs

Martin Baumgartner

Michael Kreitel

Bernhard Jocham

A method for evaluating the state of a fuel-air mixture and/or the combustion in a combustion chamber of an internal combustion engine, with sample signals of flame light signals being stored in a database, and with flame light signals of the combustion in the combustion chamber being detected and compared with the stored sample signals, and with an evaluation of the state being output in the case of coincidence between the measured and stored signal patterns. In order to enable the monitoring of the combustion in the simplest possible way the sample signals in the database are stored with the assigned emission values and an evaluation of the state of the combustion is performed with respect to the obtained emissions in the case of coincidence between the measured and stored signal patterns for the combustion chamber of the respective cylinder.

Method for evaluating the state of a fuel-air mixture

An optical sensor or emitter () used for monitoring combustion processes in a combustion chamber is provided with an optical element () on a side facing the combustion chamber and an optical fiber or fiber bundle () on a side opposite the combustion chamber, the optical element and optical fiber/fiber bundle being jointly held in a metal sleeve (). An annular gap filled with solder material () is provided between the optical element () and the inside of the metal sleeve ().

Optical sensor or emitter used for monitoring combustion processes

An optoelectronic measuring device for monitoring combustion processes in the combustion chamber of an internal combustion engine during operation includes optical sensors assigned to the combustion chamber and connected to an evaluation unit, the sensor ends on the side of the combustion chamber being essentially positioned in a plane and the sensors being aligned so that the individual viewing angles of the sensors will uniformly cover at least one predefined measuring sector of the combustion chamber. A simple way of localizing the origin of engine knocking in the combustion chamber is ensured by positioning the optical sensors in an essentially cylindrical component projecting into the combustion chamber with the sensor ends positioned essentially radially along the wall of the component.

Optoelectronic measuring device

An optoelectronic measuring device for monitoring combustion processes in a combustion chamber of an internal combustion engine during operation is provided with optical sensors which are connected to an evaluation unit. The optical sensors may be located in a seal element bounding the combustion chamber. To obtain high measuring quality in a simple manner, the optical sensors each include a lens assembly having a focusing lens whose flat end opposite the combustion chamber is coincident with the focal plane of the focusing lens and is abutted by an end of at least one optical fiber.

Optoelectric measuring device for monitoring combustion processes

For optical detection of the velocity of gas bubbles in the cooling liquid of an internal combustion engine, light is radiated into the coolant by means of at least one emitter, and the scattered light caused by the gas bubbles, or rather, the change in intensity of light radiation emitted into the coolant, is measured by an optical sensor. The scattered light or intensity change is measured in at least two adjacent areas, and the velocity of the bubbles is determined from the travel time between the measurement signals.

Method for optically detecting gas bubbles moving in a coolant

An optoelectronic measuring device for the purpose of observing and recording combustion processes in the combustion chamber of an internal combustion engine during operation, includes optical sensors directed at the combustion chamber and connected to an evaluation unit. The optical sensors are integrated in a sealing element positioned in a plane cutting the combustion chamber, which will permit the performance of measurements without any modifications of the engine or the geometry of the combustion chamber.

Growing community of inventors

Wegersfeld, Austria

Harald Arnulf Philipp