Robert Boschgmbh

Timm Hollmann

Helmut Rembold

Jens Wolber

Thomas Frenz

Bernd Schroeder

Karsten Hinn

Roberto Verrino

Jurij Woelfling

Udo Schulz

Klaus Joos

Joerg Kuempel

Markus Amler

Ruediger Weiss

Tilman Miehle

Christian Wiedmann

Thomas Kuhn

Rainer Ecker

Christian Koehler

Uwe Mueller

Alexander Schenck Zu Schweinsberg

Achim Hirchenhein

Frank Mueller

Peter Schenk

Hans-Friedrich Schwarz

Juergen Eckhardt

Matthias Walz

Oliver Albrecht

Laurent Nack

Manfred Dietrich

Jan Kappa

Claus Wundling

Marcel Matischok

Frank Ottusch

Ruediger Schnell

Erkan Danisman

Yves Lamirand

Stefan Smetana

Eugenia Schwarz

Ralf Knitz

Gerhard Haaf

Kosuke Tamanoi

Jörg Kuempel

Richard Lorenz

The invention relates to a method for determining an effective prevailing uncertainty value () for an emission value () for a given time point when operating a drivetrain () of a motor vehicle with an internal-combustion engine (), wherein, at different times (n), one prevailing emission value () and one prevailing uncertainty value () are determined for the emission value, wherein the effective prevailing uncertainty value () for the given time point is determined from prevailing uncertainty values () and prevailing emission values () prior to the given time point.

Method for determining an effective prevailing uncertainty value for an emission value for a given time point when operating a drivetrain of a motor vehicle

The invention concerns a method () for operating a motor vehicle () with a combustion engine (), including the determination () of a current operating state of the vehicle (), the determination () of an emission state of the vehicle () during the determined operating state, carrying out () at least one measure to reduce emissions depending on the emission state and evaluating () the at least one measure in connection with the operating state with regard to its success in reducing emissions. Furthermore, a computing unit () and a computer program product for carrying out such a method () are proposed.

Method for operating a motor vehicle with a combustion engine

A method for monitoring emissions in the exhaust gas of an internal combustion engine in a vehicle, comprising carrying out () multiple successive emission measurements for at least one component in the exhaust gas, wherein each of the emission measurements is respectively performed after a driving distance of predefined length is covered by the vehicle; storing () a distance-related emission value (E), which was obtained () on the basis of the measurement, in a memory element () for each of the emission measurements; and forming () a smoothed emission level for a current point in time on the basis of multiple of the previously stored distance-related emission values, wherein more recent emission values are taken into consideration more strongly than emission values lying farther back in time in the formation of the smoothed emission level.

Method for monitoring an emission level in a vehicle

For an optimized metering of fuel and water for the operation of an internal combustion engine in which a direct injection and an intake manifold injection are provided for metering fuel into the internal combustion engine, and in which the internal combustion engine is assigned a system for water injection, a same intake manifold injector is used for both water and fuel injection.

Fuel metering for the operation of an internal combustion engine

A method for ascertaining a correction value for fuel metering of a fuel injector of an internal combustion engine, in which fuel is injected from a high-pressure accumulator into a combustion chamber with the aid of the fuel injector, the fuel being injected into the combustion chamber in multiple separate injection procedures during one work cycle, a value representative of a static flow rate through the fuel injector being ascertained by ascertaining, for at least one of the multiple separate injection procedures, a ratio of a pressure change caused in the high-pressure accumulator by the at least one of the multiple separate injection procedures and an associated duration characteristic for the at least one of the multiple separate injection procedures being ascertained, and the correction value being ascertained based on a comparison of the representative value to a comparison value.

Method for ascertaining a correction value for fuel metering of a fuel injector

In a method for operating an internal combustion engine with intake manifold injection and direct injection, a value of at least one parameter that is correlated with an exhaust gas of a combustion chamber of the internal combustion engine and that is influenced by purging of uncombusted fuel through the combustion chamber into the exhaust gas is ascertained, and, if it is concluded, based on the ascertained value of the at least one parameter, that uncombusted fuel is purged, at least one operating parameter for filling the combustion chamber is adjusted.

Method for operating an internal combustion engine

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

A method for controlling a fuel injection system () of an internal combustion engine. Including a high-pressure pump () associated with a quantity controlling valve () having a solenoid valve () electromagnetically actuatable by a coil () for supplying fuel, the quantity control valve () controlling the quantity of fuel supplied by the high-pressure pump () and the coil () of the solenoid valve () having a first current value applied thereto, in order to close the same for supplying fuel to the high-pressure pump (), the first current value being reduced to a second current value when the solenoid valve is closing (), such that the radiation of audible sound arising from the closing of the solenoid valve () is at least partially reduced.

Method for controlling a solenoid valve of a quantity controller in an internal combustion engine

A method for starting an internal combustion engine that is operated with a fuel mixture made of at least two types of fuel. An injection of the fuel into combustion chambers of the internal combustion engine occurs starting at a predefined pressure threshold of the fuel in a fuel supply according to a high-pressure starting mode, and also according to a low-pressure starting mode if the predefined pressure threshold is no longer met. The pressure threshold is selected as a function of the mixture ratio of the fuel types in the fuel mixture. In this way it can be achieved that differences can be taken into consideration in the optimal mixture formation of the fuel types.

Method for fuel injection

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 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.

In a method for operating an internal combustion engine () equipped with a piston pump as a high-pressure pump (), which is driven by a drive shaft () of the engine (), in which the high-pressure pump () delivers fuel from a low-pressure region () to a high-pressure side () and a quantity control valve () sets the quantity of fuel delivered by the high-pressure pump (), the acoustic emission of the high-pressure pump is reduced by virtue of the fact that the high-pressure pump () functions in a two-point operation, alternating between full delivery for individual or successive piston strokes and idle delivery for individual or successive piston strokes and, when the pressure falls below a lower pressure threshold, the full delivery is activated until an upper pressure threshold is reached.

Two-point control of a high-pressure pump for direct-injecting gasoline engines

A procedure to recognize a depressurized fuel system of a motor vehicle with an internal combustion engine that includes a parameter characterizing the fuel system temperature is acquired when turning off the internal combustion engine; a parameter characterizing the fuel system temperature is acquired in the immediately subsequent driving cycle when starting the internal combustion engine; and from the difference between the shut-down temperature and the starting temperature, the pressure in the fuel system is inferred.

Procedure to recognize a depressurized fuel system

A high-pressure fuel pump and methods for controlling this high-pressure fuel pump are described in which the pumping quantity regulation does not cause significant heating of the fuel to be pumped. The partial-load efficiency of the high-pressure fuel pump, triggered in accordance with the invention, is also very good.

Method, computer program, and control and/or regulating unit for operating an internal combustion engine

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.

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Ludwigsburg, Germany

Timm Hollmann