Robert Boschgmbh

Mtu Friedrichshafen Gmbh

Stephan Uhl

Eberhard Schnaibel

Helmut Schneider

Georg Mallebrein

Michael Baeuerle

Lothar Diehl

Andrea Lohmann

Andreas Blumenstock

Lutz Reuschenbach

Klaus Winkler

Jens Schneider

Michael Lehner

Andreas Roth

Helmut G Schwegler

Ulrich Kuhn

Thorsten Fritz

Michael Nicolaou

Oliver Miersch-Wiemers

Dimitrios Stavrianos

Franz Butscher

Juergen Pfeiffer

Carlos Koster

Michael Hermann

Juergen Wendt

Jens Tophoven

Werner Krauss

The invention relates to a method for starting an internal combustion engine for a motor vehicle, said internal combustion engine having at least two cylinders, a valve drive with at least one inlet valve and at least one outlet valve for each of the cylinders, wherein at least the closing times of the inlet valves can be variably adjusted, and a direct injection system, in particular a gasoline direct injection system, the starting process being initiated by a direct injection and ignition in one of the cylinders. During a starting process, the closing time of at least one inlet valve differs from at least one of the other cylinders dependent on at least one current state value.

Method for starting an internal combustion engine, device and computer program product

The invention concerns a method to determine the composition of a fuel from the components ethanol and gasoline of an internal combustion engine, wherein the fuel is supplied to the internal combustion engine by a fuel supply unit and via two fuel distributor rails; and the exhaust gas is discharged from the internal combustion engine by two exhaust gas manifolds of a first and a second exhaust gas system, which are separated from each other, wherein the first and second exhaust gas system have in each case at least one exhaust gas probe and wherein current changes in the ethanol content of the fuel are evaluated from the signal differences of lambda signals from the exhaust gas probes. With this method, a change in the ethanol content of the fuel can be detected, and an explicit condition for a change in fuel can be derived. Moreover, with the method, errors in the fuel-mixture can be distinguished from an altered fuel composition, which takes place after the tank has been filled fueling.

Method to determine a fuel composition

A device and a method for closed-loop control of at least a first exhaust gas turbocharger with variable turbine geometry. In this regard, a first closed-loop control system is provided for automatically controlling the charge air pressure, and a second closed-loop control system is provided for automatically controlling the turbine speed. The second closed-loop control system is subordinate to the first closed-loop control system. The correcting variable (SG) of the first closed-loop control system corresponds to the reference input of the second closed-loop control system.

Device and method for the closed-loop control of an exhaust gas turbocharger with variable turbine geometry

In a method for controlling a multicylinder internal combustion engine, where a cylinder-equalization control is performed to adjust cylinder-specific torque contributions to the overall torque of the internal combustion engine, a functioning monitoring is performed for the cylinder-equalization control, and, in response to disturbances in the area of the cylinder-equalization control, at least one error signal may be generated to indicate the existence of a disturbance.

Method and device for controlling a multicylinder internal combustion engine

The operation of an internal combustion engine under unfavorable operating conditions can lead to the formation of deposits in the combustion chamber (). A method and an arrangement for operating an internal combustion engine (), especially of a motor vehicle, is suggested, wherein fuel is conducted into a combustion chamber () and is there combusted. When deposits are detected in the combustion chamber (), measures are initiated in a targeted manner for cleansing the combustion chamber (). A knocking combustion is especially introduced and/or a cleansing liquid is added to the inducted combustion air.

Method for operating an internal combustion engine

The method serves for input signal correction of a misfire detection function and for cylinder equalization in an internal combustion engine, especially of a motor vehicle. Here, it is provided that a control for the input signal correction ( ) and a control of the cylinder equalization ( ) are activated alternatively by an alternative circuit unit ( ).

Method for correcting the input signal and for synchronizing the cylinders in an internal combustion engine

The invention relates to a method for combustion misfire detection in multi-cylinder internal combustion engines. In the method, rough-running values for each cylinder of the engine are determined individually for each crankshaft rotation by measuring the segment times. The segment times include the times corresponding to the piston movement of each cylinder to be measured during which times the crankshaft passes through a corresponding circular segment angular region and, on the basis of filtered rough-running values, equalization or corrective factors are computed for each cylinder in an evaluation unit for influencing injection times or injection time points of each individual cylinder. The determined rough-running values (LUT) or the filtered rough-running values (FLUT) are compared in a desired value comparison to a threshold value (SW ) which is pregiven in value significantly less than the threshold value (SW ) for misfire detection. A reduction of the threshold value (SW ) for misfire detection to a lower level is effected by the continuous dropping below the second threshold value (SW ) within a pregiven time interval (&Dgr;t) or during a specific number of engine revolutions (&Dgr;u).

Method for detecting combustion misfires in an internal combustion engine

The invention is directed to a method and arrangement for checking the operability of a vessel. Pressure is introduced into the vessel utilizing a pressure source having operating variables which vary during operation of the pressure source. These operating variables are detected while the pressure is introduced into the vessel and a conclusion as to a presence of a leak in the vessel is drawn from the operating variables. By utilizing the operating variables, a statement as precise as possible is provided as to the presence of the leak with as little additional equipment as possible.

Method and arrangement for checking the operability of a tank-venting

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Friedrichshafen, Germany

Stephan Uhl