Robert Boschgmbh

Robert Bosch Gbmh

Thomas Frenz

Klaus Joos

Markus Amler

Jens Wolber

Hansjoerg Bochum

Karsten Hinn

Timm Hollmann

Helmut Rembold

Ruediger Weiss

Martin Streib

Udo Hafner

Winfried Moser

Karl Gmelin

Ulrich Steinbrenner

Klaus Mueller

Winfried Langer

Bernd Schroeder

Uwe Mueller

Peter Ropertz

Matthias Philipp

Joerg Kuempel

Rolf Reischl

Manfred Kirschner

Matthias Kuesell

Matthias Schumacher

Karsten Kroepke

Klaus Lang

Andreas Kufferath

Stefan Keller

Juergen Eckhardt

Ingo Richter

Hans-Friedrich Schwarz

Claus Schneider

Mathias Rollwage

Laurent Nack

Christian Wiedmann

Uwe Schaupp

Klaus-Dieter Hufnagel

Edmund Schaut

Bernd Herrmann

Volkmar Goldschmitt

Bernd Kudicke

Wolfgang Saatmann

Hans-Peter Harnisch

Tobias Flaemig-Vetter

Bernd Fluhrer

Tim Hollmann

Marco Zucchini

Stefan Smetana

Jörg Kuempel

A method for operating an inductive load, which is operated in a motor vehicle with electric voltages of different magnitudes, is provided, a current rise in the inductive load being influenced by selecting pulse lengths and pulse pauses of the electric voltage.

Method and device for operating an inductive load with different electric voltages

A method and a device for operating a drive unit of a vehicle are provided, which result in reduced fuel consumption in the overrun condition. An output variable of the drive unit is set, in this context, according to a preset driving strategy in the overrun condition of the drive unit. At least two preset driving strategies are specified for the overrun condition of the drive unit. In the overrun condition, one of the specified driving strategies is selected as a function of a driving situation.

Method and device for operating a drive unit of a vehicle

A method for operating an internal combustion engine having a fuel pump with a drive shaft is provided, the fuel pump conveying fuel into at least one fuel-collection line, the fuel being subsequently conveyed to at least one combustion chamber via at least one fuel-injection device. In the method, a quantity of the fuel conveyed by the fuel pump into the fuel-collection line is set by means of a valve device. The valve device is configured to selectively connect a discharge side of the fuel pump to a low-pressure region of the fuel pump (during deactivation phase), and selectively disconnect the discharge side from the low-pressure region (during supply phase). In supplying the quantity of fuel, a supply rate, defined as the number of supply phases of the fuel pump per rotation of the drive shaft, is determined as a function of at least one operating parameter of the internal combustion engine.

Method for operating an internal combustion engine

A method for operating a fuel metering system of a motor vehicle is provided, in which fuel is delivered by at least one supply pump to at least one high pressure area, the fuel being injected by at least one fuel injector from the high pressure area directly into at least one combustion chamber, at least one sensor detecting the pressure in the high pressure area, and at least one pressure regulating element being provided for adjusting the pressure in the high pressure area.

Method for operating a fuel measurement system in a motor vehicle, computer program, control device and fuel measurement system

An internal combustion engine is operated according to a method, in which the fuel is pumped from a first fuel pump to a second fuel pump and from there into a high-pressure region. The fuel passes therefrom into at least one combustion chamber of the internal combustion engine, by means of at least one fuel injection device. In certain operating conditions of the internal combustion engine, the pressure in the high-pressure region is lowered by means of a release device. According to the invention, the reliability and security of operating the internal combustion engine may be increased by monitoring the functioning of the release device (through).

Method, computer program, control and/or regulation device for operation of an internal combustion engine and fuel system for an internal combustion engine

A method for operating a fuel-supply system for an internal combustion engine of a motor vehicle is provided, the fuel-supply system having a fuel-storage tank, a fuel pump and a pressure sensor, the fuel pump supplying fuel from the fuel-storage tank to a pressure region, the pressure sensor being arranged in the pressure region, and the pressure sensor generating a signal representing the pressure in the pressure region.

Method for operating a fuel supply system for an internal combustion engine in a motor vehicle

A method for operating an internal combustion engine, in particular of a motor vehicle including at least one fuel pump delivers the fuel from a fuel tank into a fuel line. The pressure of the fuel, at least in a region of the fuel line, is increased as a function of an operating state. In order to assure a reliable starting of the engine, the pressure of the fuel, at least In the above-mentioned region of the fuel line is at least intermittently increased when the engine is not running.

Method, computer program and control and/or regulation device for operating an internal combustion engine, and corresponding internal combustion engine

In an internal combustion engine, the fuel is conveyed by an electrically driven fuel pump. The intake side of this pump is connected to a fuel tank and its outlet side is connected to a pressure region. A prerun of the electrically driven fuel pump may be performed before the startup of the internal combustion engine. In order to increase the service life of the fuel pump, an actual pressure (pactual) in the pressure region may be detected by a pressure sensor and the execution of the prerun be a function of at least the signal of the pressure sensor.

Method, computer program control and regulating unit for operating an internal combustion engine, as well as an internal combustion engine

Method for operating an internal combustion engine in which fuel is injected into a combustion chamber by an injector. The injector has a drivable piezo-actuator. A setpoint value is generated for driving the piezo-actuator. A setpoint charge quantity (QC) is determined from the setpoint value, and an actual charge quantity (QC) supplied to the piezo-actuator is determined. The setpoint charge quantity (QC) and the actual charge quantity (QC) are combined, and the combined result (S) acts upon the drive circuit of the piezo-actuator.

Method, computer program, memory medium and control and/or regulating unit for operating an internal combustion engine, as well as internal combustion engine, in particular for a motor vehicle

In an internal combustion engine, the fuel reaches the combustion chamber of the engine via a fuel-injection device which includes a piezo actuator (). In order to be able to optimally inject the fuel, it is suggested that the desired level (U_DES) of the drive energy (U) and/or the desired gradient (dU_DES) of the drive energy (U), with which the piezo actuator () is driven, is dependent upon a plurality of influence quantities (T, t, n, dx, dh) which influence the operating behavior of the piezo actuator ().

Internal combustion engine and method, computer program and control apparatus for operating the internal combustion engine

A method for operating an internal combustion engine is described, in which fuel is injected by an injector into a combustion chamber. The injector has an activatable piezoactuator. In the method, a precontrol setpoint for activating the piezoactuator is generated. The precontrol setpoint is combined with a charge regulation of the charge quantity conveyed to the piezoactuator.

Method, computer program, memory medium, and control and/or regulating device for operating an internal combustion engine, and an internal combustion engine in particular for a motor vehicle

In an internal combustion engine, the fuel enters at least one combustion chamber of the internal combustion engine via at least one fuel injection device. A piezoelectric actuator moves a valve element of the fuel injection device. The function of the piezoelectric actuator is monitored and a malfunction is detected. To minimize the risk of damage to the internal combustion engine in the event of a malfunction of the piezoelectric actuator, the fuel mass flow to the fuel injection device is reduced if a malfunction of the piezoelectric actuator is detected.

Method and control and regulating device for operating an internal combustion engine with piezoelectrically actuated fuel injection valves

The invention relates to a method and an arrangement for diagnosing a fuel supply system of an internal combustion engine. In order to make possible a differentiation of the fault with respect to individual components of the fuel supply system, a method is suggested which is characterized by the following steps: recording the trace of the fuel pressure in the fuel supply system (); forming the frequency spectrum of the fuel supply trace (); and, analyzing the frequency spectrum (). The analysis of the frequency spectrum preferably includes the following steps: comparing the trace of the recorded frequency spectrum to the trace of the frequency spectrum of a fault-free operating fuel supply system at this operating point; and, in the event that deviations between the traces of the frequency spectra are present, classifying the deviations in accordance with the nature of the faults in the fuel supply system via which the deviations are caused.

Method and device for diagnosing of a fuel supply system

The invention is directed to a method for operating an internal combustion engine () wherein a fault of a pressure system with a pressure sensor () is determined by a first diagnostic system (') of the engine (). The pressure sensor () is especially a pressure sensor of a high pressure fuel system of the engine. For a plausibility consideration of a pressure system fault, which is determined by the first diagnostic system (&#x2032;), at least one further diagnostic system (&#x2032;) of the engine () is checked as to a second fault.

Method for operating an internal combustion engine, the internal combustion engine and a control apparatus therefor

A fuel delivery system for an internal combustion engine, having a fuel feed pump, which delivers fuel which is at pilot pressure to a high-pressure fuel pump that communicates on the high-pressure side with at least one injection valve, in order to deliver fuel at high pressure to the injection valve or valves. To prevent vapor bubble development in the high-pressure fuel pump, which impairs its pumping capacity and pressure generation, a coolant medium flow can be delivered to the high-pressure fuel pump via at least one coolant conduit, in order to keep the temperature (T) of the high-pressure fuel pump below a critical operating temperature (T).

Fuel supply system for an internal combustion engine

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Noerdlingen, Germany

Thomas Frenz