Robert Boschgmbh

Martin Streib

Hong Zhang

Frank Bederna

Andreas Baumann

Torsten Bauer

Werner Huber

Karl-Bernhard Lederle

Winfried Langer

Eberhard Schnaibel

Georg Mallebrein

Frieder Keller

Rolf Leonhard

Kersten Wehmeier

Michael Pfeil

Andreas Pape

Hubert Bischof

Thomas Zeller

Otto Holzinger

Klaus Joos

Werner Haeming

Carsten Kluth

Jens Wolber

Thomas Frenz

Ruediger Weiss

Thomas Huber

Stefan Tumback

Martin Klenk

Peter Schelhas

Andreas Posselt

Rene Schenk

Otto Karl

Peter Baeuerle

Nikolas Poertner

Bernd Kesch

Marko Lorenz

Juergen Pantring

Karsten Kroepke

Armin Hassdenteufel

Andreas Kufferath

Detlef Heinrich

Dieter Lederer

Ulrich Koelle

Tobias Roulet

Wolfgang Borst

Thorsten Fritz

Peter Wiltsch

Kai Jakobs

Jurgen Forster

Karsten Mann

Pierre-Yves Crepin

Dieter Sorg

Thomas Golzer

Helmut Randoll

Manfred Franz

Stefan Polach

Silke Haag

Martin Knoss

Martin Person

Wolfgang Bullmer

Juergen Pfeiffer

Helmut Zell

Berthold Steinmann

Erich Breuser

Emilie Hincker-Piocelle

Mathias Lohse

Li Luo

Diethard Lohr

Wolfgang Loewl

Thomas Goelzer

Richard Schottle

Thomas Mossner

Marcus Leuz

Thorsten Klinkhammer

Volk R Stegmann

Federico Buganza

A method for knock control of an internal combustion engine capable of being operated using a water injection system, in which at least one parameter of the knock control is determined as a function of a variable connected to the water injection system, in particular the water content.

Method for knock control of an internal combustion engine

The invention relates to a method for preparing models of technical devices, wherein each technical device comprises units that are connected to each other by means of connection point, wherein, when performing the method, at least one structure made of units connected to each other by means of connection points comprising commonalities for all technical devices is integrated and automatically described as at least one common module () for all models.

Method for detecting leaks in a tank system

A method is provided for diagnosing the operability of fuel vapor intermediate stores (), in particular of activated carbon filters, in tank-venting systems with at least one tank () and at least one fuel vapor intermediate store (). In this case an actual change degree of filling of the fuel vapor intermediate store () is determined as a consequence of absorption or desorption processes of gaseous hydrocarbons in the fuel vapor intermediate store (). The actual change in degree of filling is compared with a desired change in degree of filling and, from the comparison, a conclusion about the operability of the fuel vapor intermediate store () is drawn.

Diagnosis of the operability of fuel vapour intermediate stores

A procedure for determining the vapor pressure of a fuel in a tank is provided, whereby the sound velocity and/or a variable representing the sound velocity are determined the in the gas-filled compartment of the tank and the vapor pressure is assumed from the sound velocity and/or from the variable representing the sound velocity at a familiar total pressure.

Procedure and device for determining the vapor pressure of a fuel

A method for setting operating states of an internal combustion engine, in particular an internal combustion engine of a hybrid drive. In addition to the internal combustion engine, the hybrid drive includes at least one electric drive, a hybrid coordinator and a control unit assigned to the internal combustion engine in which functions are implemented. The functions request operating states favorable to their running ability from the hybrid coordinator which performs a commensurate modification of the distribution of power between the internal combustion engine and the at least one electric drive.

Defined internal combustion engine operation in vehicles having a hybrid drive

Method and apparatus for detecting tank leaks, in which a gas pressure acts on a fluid which is situated in a tank, and in which the gas pressure in the tank or tank system is changed, wherein a tank leak is detected by evaluation of a temporal profile of a sum pressure of the fluid which is situated in the tank.

Method and apparatus for detecting tank leaks

The invention relates to a procedure to heat up or keep warm an exhaust gas emission control assembly of a vehicle with a drive train containing one transmission. The drive train is powered by an internal combustion engine and at least one second drive unit. It is proposed that also in an operating state, which lies outside of the idle speed, a rotational speed or a torque of the internal combustion engine deviating from values for the engine rotational speed and the torque is set, which would exist during an identical driving condition without the heating-up or keeping warm of the exhaust gas emission control assembly.

Procedure for heating-up and keeping warm an emission control assembly of a motor vehicle

The invention relates to a method for determining the composition of a fuel blend from a first and at least a second fuel to operate an internal combustion engine with at least one combustion chamber, wherein fuel blends of different composition combust at different optimal ignition angles ZWwith an optimal degree of efficiency &#x3b7;. Provision is thereby made for the ignition angle ZW of the internal combustion engine to be altered, for the degree of efficiency &#x3b7; of the internal combustion engine or a parameter, which is a function of it, to be determined as a function of the ignition angle ZW and for the composition of the fuel blend to be determined from the change in the degree of efficiency &#x394;&#x3b7; or the parameter, which is a function of it, when the ignition angle ZW is altered and/or from the ignition angle ZW as a function of the degree of efficiency &#x3b7; or the parameter, which is a function of the degree of efficiency &#x3b7;. The method makes it possible to determine the fuel mixing ratio in the fuel tank of internal combustion engines, which can be operated with different fuels.

Method for determining the composition of a fuel blend

A drive unit includes an engine and a transmission having a variable transmission ratio. An instantaneous setpoint power output quantity of the drive unit is determined from an intended power output. The setpoint power output quantity is a function of the instantaneous transmission ratio of the transmission at least for a given intended power output.

Method for operating a drive unit

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 of diagnosing a fuel tank leak in a fuel tank ventilation system, comprising a fuel tank, an accumulator for fuel vapors and a fuel tank ventilation valve opening out into an intake manifold of an internal combustion engine, wherein the fuel tank, the accumulator and the fuel tank ventilation valve are connected by way of a system of lines and wherein the accumulator has an aeration line with a check valve, the method comprising:

Procedure to diagnose a leak in the fuel tank in a fuel tank ventilation system

A procedure to diagnose a fuel tank ventilation system of a motor vehicle and a device to implement the procedure are proposed. The fuel tank ventilation system contains at least one first ventilation pathway discharging into the air intake area of the internal combustion engine downstream behind a supercharger as well as at least one second ventilation pathway discharging into the air intake area upstream in front of the supercharger. Provision is made for a diagnosis with at least two partial diagnoses, whereby the first partial diagnosis pertaining to the first ventilation pathway is implemented, if the intake manifold pressure in the discharge area of the first ventilation pathway is smaller than the fuel tank system pressure; and the second partial diagnosis pertaining to the second ventilation pathway is implemented, if the intake manifold pressure in the discharge area of the first ventilation pathway is greater than the fuel tank system pressure. An error signal is provided, if at least one of the partial diagnoses generates a partial error signal.

Procedure to diagnose a fuel tank ventilation system and device to implement the procedure

In a method for testing the functional reliability of a fuel-tank venting valve which is provided in a tank system of a motor vehicle in particular, is connected to an intake manifold and is triggerable by a control unit, a pressure source is provided for testing the tank system for leaks by using excess pressure or a vacuum, and the test of the functional reliability of the fuel-tank venting valve is performed on the basis of at least one performance quantity of the pressure source. In order to achieve a short diagnostic time and a high degree of diagnostic certainty, the fuel-tank venting valve is triggered to open or close, and a certain change in pressure is implemented. The at least one performance quantity of the pressure source is detected, and a properly opening and closing fuel-tank venting valve is determined from the performance quantity thus detected.

Method and control unit for function diagnosis of a fuel-tank venting valve of a fuel tank system in a motor vehicle in particular

The invention relates to a method and an arrangement for monitoring the operability of a secondary air system of an internal combustion engine having an exhaust-gas system. The secondary air system includes a secondary air pump. In the method and arrangement, a signal is determined which characterizes the secondary air flow. In the method, at least one signal of at least one operating characteristic variable of the secondary air pump is determined during the determination of the signal characterizing the secondary air flow and a conclusion is drawn as to a fault in the secondary air system when the signal of the at least one operating characteristic variable lies outside of a pregiven interval. The at least one signal of at least one operating characteristic variable is determined in dependence upon the operating state of the engine. This signal is determined from a signal for the pump current of an electrically operated secondary air pump.

Method and arrangement for monitoring the operability of a secondary air system

In order, in a diagnostic unit for leak testing of a tank system of an internal combustion engine, to allow minimization of the energy consumption during a diagnostics test and simultaneously prevent the emission of fuel gases, a sleep/wake-up mechanism is provided. The diagnostic unit enters a sleep mode for a selected time interval after the internal combustion engine is turned off, the diagnostic unit enters a wake-up mode at the end of the first time interval and at least acquires the measurement data necessary for the diagnostics test in the wake-up mode. The diagnostic unit then enters the sleep mode again during the diagnostics period. The diagnostic unit is switched off at the end of the diagnostics period.

Method and device for energy-saving leak testing of a fuel tank system, in particular of a motor vehicle

Growing community of inventors

Vaihingen, Germany

Martin Streib