Conti Temic Microelectronic Gmbh

Temic Telefunken Microelectronic Gmbh

Stephan Krell

Reinhold Hagel

Mehmet Tuna

Peter Schimmelpfennig

Combustion failures of an internal combustion engine are controlled in closed loop fashion by sampling an engine r.p.m. to obtain a speed signal. The speed signal is subjected to a Hartley-Transformation to obtain angular frequencies or engine orders which are further processed to identify the cylinder which had a combustion failure and thereby reduced an actual engine power output compared to a rated power output. A power output correcting signal is produced and supplied to the engine. The system for performing these steps includes at least a speed signal sampler, a frequency analyzer to perform the Hartley-Transformation, a cylinder identifier or classifier and a controller which supplies the closed loop control signal to the engine.

Regulating the mode of operation of an internal combustion engine

A sensor system for the measurement of the optical conditions at a boundary surface between a first medium that is a solid body and a second medium whose refracting indices are different. The sensor system has an optical unit comprising at least one sending unit with at least one sending element, at least one receiving unit with at least one receiving element, and an optical path connecting the send unit(s) to the receiving unit(s). A light-conducting body with a base surface and two optically active end surfaces is arranged in the optical path, where the base surface of the light-conducting body is attached to the surface side of the first medium between the sending unit(s) and the boundary surface. The first end surface of the light-conducting body is directed towards the sending unit(s) and the second end surface of the light-conducting body is directed towards the receiving unit(s). The two end surfaces of the light-conducting body, the light emission surface of the sending unit(s) and the light admission surface of the receiving unit(s) are made with a predetermined convex shape.

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Schwabach, Germany

Stephan Krell