Robert Boschgmbh

Gottfried Flik

Dietmar Hahn

Detlef Nowak

Guenter Dantes

Gilbert Moersch

Frank Schatz

Joerg Heyse

Heinz Fuchs

Stefan Arndt

Beate Ader

Thomas Schittny

Alexandra Jauernig

Juergen Hackenberg

Falk Herrmann

Oliver Stoll

Klaus Kuettner

Franz Laermer

Bernhard Mattes

Bernd Schumann

Andreas Krauss

Michael Stumber

Fabian Henrici

Roland Mueller-Fiedler

Christian Doering

Hans-Peter Trah

Wilfried Aichele

Gerhard Benz

Sven Zinober

Georg Bischopink

Ronald Glas

Jorg Heyse

Christoph Treutler

Juergen Graf

Ottmar Martin

Georg Zimmermann

Armin Glock

Ralf Trutschel

Heinz Friedrich

Henning Teiwes

Markus Ohnmacht

Petra Heinbuch

Hagen Schmidt

Jochen Riefenstahl

Christian Fuchs

Viacheslav Bekker

Stefan Muelders

Dieter Hahn

Andrew Johnson

A method for operating an internal combustion engine is described. At least one composition of a gas mixture is determined in at least one combustion chamber of the internal combustion engine. At least one combustion chamber pressure is detected in the interior of the combustion chamber and at least one local combustion chamber temperature is detected in the interior of the combustion chamber. The composition is inferred from the combustion chamber pressure and the combustion chamber temperature.

Method for operating an internal combustion engine

An ultrasound-based measuring device includes a measurement body, at least one ultrasonic transmitter for coupling ultrasonic measurement signals into the measurement body, and at least one ultrasonic receiver for detecting the ultrasonic measurement signals reflected at an end face of the measurement body. The at least one ultrasonic transmitter emits both a longitudinal and a transverse measurement signal. The influence of a physical disturbance variable on the measurement section traversed by the measurement signals during a determination of a measurement pressure prevailing at the end face and/or of a measurement temperature prevailing at the end face can be taken into account on the basis of the propagation times and a difference between the propagation times of the longitudinal and transverse measurement signals reflected at the end face.

Ultrasound-based measuring device and method

A measurement sensor for analyzing a nonpolar liquid contains a field effect transistor that has an exposed gate contact for wetting with the nonpolar liquid, and an electrical shield that surrounds the gate contact and has openings for inflow and outflow of the nonpolar liquid.

Measurement sensor, method for analyzing a nonpolar liquid, method for manufacturing a measurement sensor

A sensor system for measuring the pressure in the combustion chamber of an internal combustion engine, by the use of which a high measuring accuracy may be achieved, based on high measuring sensitivity and great thermal stability. In addition, the construction of the sensor system makes possible great system flexibility, and particularly very space-saving installation in the combustion chamber of an internal combustion engine. For this purpose, the sensor system includes at least one electrically conductive spring element and at least one electrically conductive counter-element,

Sensor system for measuring pressure

A method for producing a component is provided, in particular a deformation sensor, having a sensor element which includes at least one region that is sensitive with respect to expansion or compression, as well as electrical structures which are in connection therewith. To this end, a sacrificial layer is produced on or within a substrate and an activatable layer on top of the sacrificial layer, the sensitive region and at least a portion of the electrical structures being positioned on top or within an activatable layer, and a circumferential trench is produced around the region of the sensor element to be produced and having the sensitive region and the portion of the electrical structures, the trench being interrupted by at least one connecting point, which connects the region of the sensor element to the portion of the activatable layer lying outside the circumferential trench. This is followed by a removal of the sacrificial layer underneath the region of the sensor element, a fixation of the region of the sensor element with the aid of a holding device, rupturing of the connecting points and a transfer of the sensor element, fixated by the holding device, and connecting a carrier to the component as well as joining with a carrier to the component.

SOI component comprising margins for separation

The invention relates to an economical pressure measuring device as well as to a favorable method for pressure determination, with which a pressure measurement can be performed from outside the high-pressure container. To that end, the device comprises an ultrasound transmitter mounted outside the pressure container and an ultrasound receiver by means of which transmitter and receiver the transit time of an ultrasonic pulse traveling through the liquid contained in the high-pressure container can be ascertained, and the method comprises generating an ultrasonic pulse outside the high-pressure container measuring the time that the ultrasonic pulse requires to traverse a defined distance calculating the pulse speed of the pulse in the liquid; and from that determining the pressure in the liquid.

Hydrostatic pressure determination in a high-pressure a reservoir (common rail) by means of ultrasonic echo time measurement

A method for manufacturing a sensor, the sensor including a three-dimensional interdigital electrode arrangement positioned on a substrate, comprising applying a temperature sensing resistor onto the substrate by sputtering a first adhesion layer and a first metallic layer onto the substrate, applying a first resist layer to the first metallic layer, applying and structuring a first resist material on the first metallic layer, and after structuring, etching the first metallic layer in resist free areas; and applying a three-dimensional interdigital electrode arrangement onto the substrate by sputtering a second adhesion layer and a second metallic layer onto the substrate, applying and structuring a second resist material only to second metal layer, after the structuring, etching the second metallic layer in resist free areas to form valleys, and after etching the second metallic layer, applying an electroplating layer.

Methods for manufacturing a microstructured sensor

A method of deciding with a high reliability whether an impact with the front side of a vehicle has been caused by a pedestrian is described. Two decision criteria are formed, and only if both decision criteria are met is it decided an impact with a pedestrian has occurred. The first decision criterion is determined by the fact that the pressures or deformations measured by a sensor on the bumper and a sensor in the area of the front edge of the engine hood are compared with reference quantities typical of impact with a pedestrian. The second decision criterion is determined by the fact that the changes in velocity and/or acceleration of the vehicle caused by an impact are determined, and then the changes in velocity and/or acceleration are compared with reference quantities which are typical of impact with a pedestrian.

Method and device for recognition of a collision with a pedestrian

A swirl disk is composed of at least one metallic material, and is configured as having at least one intake area and at least one outlet orifice, the at least one outlet orifice being introduced in a lower base layer, and having at least two swirl channels emptying into a swirl chamber, the swirl chamber being provided in a central swirl-producing layer. An upper layer is configured as a cover layer, which over its entire cross-sectional surface represents a closed layer without orifice contours. All the layers of the swirl disk are directly built up on top of each other using electroplating metal deposition (multilayer electroplating). The swirl disk is suitable for a use in a fuel injection valve, in particular in a high-pressure injection valve for directly injecting the fuel into a combustion chamber of a mixture-compressing, external-ignition internal combustion engine.

Swirl disk and fuel injection valve with swirl disk

A sensor arrangement for ascertaining the density and the viscosity of a liquid is proposed, having an arrangement comprising at least two basic sensor elements, at least one of which can be wetted with the liquid, and having electro-acoustical transducers ( ) in the basic sensor elements for generating and detecting surface acoustic waves with predetermined wave modes, from whose propagation behavior along a measurement path a measure for the density and the viscosity of the liquid can be ascertained. Liquid traps ( ) for the liquid, which extend in the applicable measurement path, are disposed in the region of at least one of the basic sensor elements, parallel to the direction of propagation of the surface acoustic wave.

Sensor array and method for determining the density and viscosity of a liquid

A sensing element, in particular for an electrochemical sensor for determining gas concentrations, having at least one three-dimensional electrode arrangement, applied on a support plate and forming trenches of a depth for measuring changes in capacitance and/or conductivity in a gas-sensitive layer arranged to a height in the trenches, the height of the gas-sensitive layer being less than the depth of the trenches.

Device for gas-sensoring electrodes

A sensor which has a bending reed and a piezoelectric resonator. Due to excitation by the piezoelectric resonator, the bending reed can be excited to vibration in a measurable medium. In this context, the vibration frequency and the damping of the bending reed are a function of the density and the viscosity, respectively, of the measurable medium. This can be measured by a piezoresistive element, and thus the density and viscosity of the measurable medium are ascertained.

Sensor, in particular for measuring the viscosity and density of a medium

The microvalve includes an electromagnetic drive and of a multilayer lower valve part, which are permanently bonded to one another and are manufactured separately from one another. The lower valve part includes at least one armature and a valve-closure element, which are axially movable, as well as a housing which at least partially surrounds this axially movable component of the microvalve. The layers of the lower valve part are built up one upon the other by means of (multilayer) electrodeposition. The microvalve can be used in fuel-injection systems of internal combustion engines.

Microvalve and method for manufacturing a microvalve

Fuel injection valve

A method for manufacturing an orifice plate that is built up in multiple layers and includes a complete axial through passage for a fluid. The orifice plate includes inlet openings, outlet openings, and at least one conduit lying between them. The layers or functional planes of the orifice plate are built up on one another by electroplating metal deposition (multilayer electroplating). Orifice plates manufactured in this manner are particularly suitable for use on injection valves in fuel injection systems, in paint nozzles, inhalers, or inkjet printers, or in freeze-drying processes, for spraying or injecting fluids such as beverages.

Method for manufacturing an orifice plate

Growing community of inventors

Leonberg, Germany

Gottfried Flik