Robert Boschgmbh

Frank Mueller

Karl Frauhammer

Gerhard Meixner

Heinz Schnerring

Andreas Strasser

Manfred Hellbach

Richard Holberg

Joerg Friedrich

Hubert Steinke

Shuwen Ling

Markus Amler

Jens Wolber

Matthias Boee

Axel Heinstein

Otto Baumann

Martin Buehner

Hardy Schmid

Juergen Lennartz

Andreas Glaser

Bernd Schroeder

Timm Hollmann

Andreas Michalske

Stefan Cerny

Werner Mayer

Christian Wiedemann

Joerg Abel

Oliver Albrecht

Stefan Michael

Christian Wiedmann

Holger Frank

Roger Hahn

Peter Schramm

Christian Suenkel

Murat Ucal

Karl Treyz

Kevin Mueller

Marcel Schaefer

Marc Braeuninger

Norbert Redlich

Marcel Behringer

Otto Ziegler

Christian Wacker

Manuel Haag

A valve for metering a fluid is described, which is used, in particular, as a fuel injector for internal combustion engines, including an electromagnetic actuator and a valve needle actuatable by the actuator, an armature of the actuator being guided on valve needle, a stop element which limits a movement of the armature relative to the valve needle being situated on the valve needle, and the armature including a spring receptacle which is open toward the stop element and in which a spring supported on the stop element is inserted. The valve needle is guided via the armature and/or the stop element along a longitudinal axis of a housing. Furthermore, as viewed along the longitudinal axis, a length of the spring receptacle is smaller than a spring length of the spring in the non-actuated initial state.

Valve for metering a fluid

A method and a device for the dynamic monitoring of an air charging system of an internal combustion engine, subsystems of the air charging system having a low-pass characteristic, and a characteristic state quantity that is to be measured being compared with a modeled, identical state quantity. The measured signal and the modeled signal are filtered using a high-pass filter or bandpass filter, and, given a change in the characteristic state quantity that is to be measured, higher-frequency signal portions are evaluated, which is advantageous with regard to the recognition of so-called slow response errors.

Method and device for dynamic monitoring of an air charging system of an internal combustion engine

A method and a computer program for recognizing and differentiating a flow rate error and a dynamic error of an exhaust gas recirculation system (EGR) of an internal combustion engine. Measured and modeled EGR mass flow signals are each subjected to bandpass filtering using time constants optimized for determining flow rate errors and bandpass filtering using time constants optimized for determining dynamic errors. The energy is determined for each of the filtered signals and an energy quotient is computed between the energies of the signals filtered for dynamic errors and the signals filtered for flow rate errors. A dynamic error and a flow rate error of the exhaust gas recirculation may be recognized and differentiated from one another on the basis of the energy quotients.

Differentiating a flow rate error and a dynamic error of an exhaust gas recirculation system

A method for managing resources of a processor device configured to control an automation installation includes using at least one first operating system and at least one second operating system, which preferably differs from the first operating system, to operate the processor device. The processor device includes at least two processor cores configured to operate the operating systems. The method further includes using at least one processor core to operate each operating system and freely selecting a number of processor cores used to operate the first operating system and a number of processor cores used to operate the second operating system.

Resource management system for automation installations

In a method for controlling a fuel injection system () of an internal combustion engine, wherein the fuel injection system () comprises a manifold () and a high-pressure pump () and a fuel dosing unit () is associated with the high-pressure pump (), wherein the fuel dosing unit () controls the amount of fuel delivered, an amount of fuel required for the operation of the internal combustion engine is determined as a function of a correction factor, which is based on a fuel pressure at the inlet of the high-pressure pump () and/or on a vapor pressure of the fuel to be delivered.

Method for controlling a fuel injection system of an internal combustion engine

The invention relates to a hand-held machine tool, particularly to a drill hammer and/or chisel hammer, having a hand-held machine tool housing and a transmission chamber with at least one transmission element arranged inside the hand-held machine tool housing. According to the invention, the hand-held machine tool includes a pressure equalization unit, provided for equalizing pressure in the transmission housing and serving at least partially for supporting the transmission element.

Hand-held power tool

A hand-operated power tool has a housing with a drive mechanism for driving a tool, a tool receptacle for receiving a tool, a handle assembly for grasping and handling located in a rear region which is remote from the tool receptacle and engaging the housing, wherein the handle assembly is vibration-damped with respect to the housing with components contained in the housing, at least and substantially in an axial direction.

Power tool with a rotating and/or hammering drive mechanism

The striking mechanism has a hammer barrel (), which has at least one control opening () through which, in an idle position, the air can escape from the hammer barrel (), and which in a striking position is closed by a covering () that prevents the escape of air. To achieve the greatest possible sealing off of the at least one control opening () and thus high efficiency of the striking mechanism, the covering () is molded from an elastomer.

Hand power tool with a pneumatic striking mechanism

A snap ring for shafts or bores is proposed, which is able to be axially fixed in position by snapping into place in a circumferential groove. The snap ring is provided with a centering ring which, when the case of the snap ring is installed in the circumferential groove, extends with radial clearance to an annular clip of the snap ring, which is disposed approximately concentrically to the circumferential groove.

Circlip

A drill hammer or riveter, includes a housing ( ), in which a hammering mechanism ( ) is accommodated that in an axially displaceably supported guide tube ( ) has a reciprocating piston ( ) and a striker ( ), drivable by the piston ( ) via an air cushion; the hammering mechanism ( ) can be moved out of an idling position into a hammering position by an axial displacement of the guide tube ( ); the guide tube ( ) is urged by a restoring spring ( ) in the direction of the idling position with a restoring force: and between the guide tube ( ) and the housing ( ), at least one damping and/or spring member ( ) is provided, which in the hammering position of the guide tuber ( ) has a spring or damping characteristic between the guide tube ( ) and the housing ( ) that deviates from the restoring spring ( ) in the region of the idling position.

Drilling hammer or impact hammer

A hand power tool has at least one safety coupling arranged in a drive train, the safety coupling having at least two coupling elements for transmitting a torque around a rotary axis, at least one arresting element which is spring loaded and held in a guiding passage for connecting the coupling elements with one another, a guiding element, a spring providing spring-loading of the arresting element and supported in direction of the arresting element by the guiding element, the guiding element being non rotatably guided relative to an axis extending parallel to the rotary axis by guiding surfaces in the guiding passage, and the arresting element unlatching and keeping in contact with a surface toward which the arresting element is urged by the spring in response to exceeding of predetermined torque.

Hand held power tool

A drilling and a percussion power tool and the tool holder, a housing, an air cushion percussion mechanism arranged in the housing and including a guiding tube, a piston reciprocating in the guiding tool, a striker reciprocating in the guiding tube, an air cushion chamber formed on the guiding tube between the striker and the piston, at least one control opening ventilating the air cushion chamber in an idling position of the percussion mechanism, a control part which in a percussion operation closes the at least one control opening for forming an air cushion in the air cushion chamber, and at least one additional opening formed in the guiding tube for ventilating of the air cushion chamber and arranged forwardly of the at least one control opening at a side of a tool so that in the percussion operation the at least one additional opening is covered by the striker.

Drilling and/or percussion power tool

Growing community of inventors

Deckenpfronn, Germany

Frank Mueller