Robert Boschgmbh

David Gaenzle

Wolfgang Fischer

Laurent Nack

Ruediger Weiss

Andreas Roth

Jochen Fassnacht

Haris Hamedovic

Thomas Winkler

Christopher Harald Onder

Helge Sprenger

Martin Rauscher

Maximilian Manderla

Silke Seuling

Peter Schwenkel

Raffael Hedinger

Richard Schoenleber

Sven Reimann

The invention relates to a vehicle drive train and to a method for operating a drive train with an electromotive drive (), wherein a rotational speed and a drive torque of the drive (), which are convertible via a toothed transmission stage () for an output (), and the drive () is controlled by means of a control signal (), wherein the control signal () has superimposed thereon a periodic torque change signal (), which is in phase with a tooth stiffness change of the toothed transmission stage (), wherein a signal strength of the torque change signal () is lower with decreasing tooth stiffness than with increasing tooth stiffness.

Method for operating a drive train, and vehicle drive train with electromotive drive

A method for determining a signal offset between a crankshaft angle signal and a combustion chamber pressure signal includes: measuring the combustion chamber pressure signal; shifting an alignment of the measured combustion chamber pressure signal with respect to the crankshaft angle signal by a plurality of respective offset angles to generate a plurality of offset combustion chamber pressure signals; reconstructing the offset combustion chamber pressure signals using a plurality of predetermined inherent pressure curves to generate reconstructed combustion chamber pressure signals; determining reconstruction errors of the reconstructed combustion chamber pressure signals as a function of differences between the offset combustion chamber pressure signals and the reconstructed combustion chamber pressure signals; and determining the signal offset between the crankshaft angle signal and the combustion chamber pressure signal as a one of the plurality of offset angles producing the reconstruction error having the lowest value.

Method and device for determining a signal offset between a crankshaft angle signal and a combustion chamber pressure signal in an internal combustion engine

A method for operating an internal combustion engine in an idle mode, in which an ignition angle and/or an air quantity of the internal combustion engine is influenced and/or is modified as a function of an idle rotation speed of the internal combustion engine. The ignition angle and/or the air quantity and/or a fuel quantity for at least one combustion chamber of the internal combustion engine is modified as a function of at least one variable characterizing a combustion event in the combustion chamber.

Method for operating an internal combustion engine in an idle mode

A power tool includes a sawing working device of an at least partially flat form and at least one actuator. The sawing working device is configured to produce a sawing cut in a working direction. The at least one actuator is configured to produce at least one oscillation in the sawing working device.

Power tool

A method for operating an internal combustion engine in which a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of the fuel, is determined during the warm-up of the internal combustion engine and an ideal fuel quantity, which is to be injected into at least one combustion chamber of the internal combustion engine during the warm-up, is ascertained therefrom.

Method for operating an internal combustion engine

Growing community of inventors

Leinfelden-Echterdingen, Germany

David Gaenzle