Robert Boschgmbh

Michael Lehner

Andrea Lohmann

Thomas Huber

Ingolf Rupp

Oliver Kaefer

Karl Ott

Stephan Uhl

Benjin Luo

Heiko Oertel

Rainer Gasper

Klaus Ries-Mueller

Martin Klenk

Jochen Fassnacht

Peter Ahner

Norbert Schneider

Thomas Schneider

Torsten Heidrich

Klaus Scherrbacher

Michael Walther

Karsten Mann

Cornelius Liebenow

Michael Bildstein

Helmut Gross

Robert Seyfang

Felix Reber

Hans Barho

Elmar Pietsch

Andreas Pfender

Ute Rollmann

Martin Bulla

The invention relates to a method for operating a drive device () of a motor vehicle, having an internal combustion engine (), an electric machine (), and a dual-clutch transmission (). The dual-clutch transmission () has two clutches (K, K), by means of which the transmission can be connected to the internal combustion engine (). At least the internal combustion engine () is actuated in a driving operation in order to generate a target drive torque, and the clutches (K, K) are actuated in opposite directions for a gear shift. During a gear shift, the electric machine () which is connected to the dual-clutch transmission () without a clutch is actuated such that the electric machine completely or partly generates the target torque at least temporarily.

Method and device for operating a drive device, drive device

Drive mechanism () for a motor vehicle (), comprising a dual clutch transmission () that includes a first powertrain (), which can be connected to a first drive unit () via a first clutch (), and a second powertrain (), which can be connected to the first drive unit () via a second clutch (), the first powertrain () being securely coupled to a second drive unit (); when shifting gears in the dual clutch trans-mission (), the second drive unit () supplies a predefined drive torque.

Drive mechanism for a motor vehicle, and method for operating a drive mechanism for a motor vehicle

A method for operating a hybrid vehicle, the vehicle being driven by at least two power plants, and at least one electric power plant charging a high voltage energy system which supplies a low voltage energy system with electrical energy, a high voltage being converted into a low voltage for supplying at least one control unit of the vehicle, and the vehicle being disconnected from the electric power plant when a fault is detected in the high voltage system. To maintain the energy supply to the control units via the low voltage system even in the event of a fault in the high voltage system, the power plant is placed in a state for generating a voltage which is uncritical for the safety of the user after the high voltage system is disconnected, the safety-uncritical voltage being converted into the low voltage for supplying the at least one control unit.

Method and device for operating a hybrid vehicle in the event of a fault in an energy system

The invention relates to a method and a device for power management of an electrical drive for a hybrid vehicle, wherein the method comprises the following steps: detecting (S) an adjustable power requirement for the electrical drive device and an available electrical battery capacity of the electrical energy store by means of a detecting unit (); comparing (S) the detected adjustable power requirement to the detected available electrical battery capacity by means of a control unit (); and deactivating (S) at least one of the electrical consumers in dependence on criteria specified by the control unit for one or a plurality of specified time intervals by the control unit (), if the comparison results in a lower available electrical battery capacity than the adjustable power requirement.

Method and apparatus for power management of an electric drive for a hybrid vehicle

A method and a device are described for starting an internal combustion engine of a hybrid drive train, having an internal combustion engine and at least one additional machine, in particular an electric machine, a separating clutch, which is situated between the internal combustion engine and the additional machine, and a crankshaft angle sensor for detecting the instantaneous crankshaft angle of the internal combustion engine being provided. Arrangements are provided to perform the following operations to start the internal combustion engine when a high-voltage battery is essentially discharged, including a) the separating clutch is or has already been disengaged, b) the additional machine is accelerated, c) after conclusion of the acceleration operation of the additional machine, the separating clutch is engaged, so that the internal combustion engine is also accelerated, d) as soon as the crankshaft angle sensor system supplies a favorable crankshaft angle, the internal combustion engine is started by direct start.

Method and device for starting an internal combustion engine of a hybrid drive train

A method for the fail-safe operation of a hybrid vehicle having an internal combustion engine, an electric motor, and additional vehicle assemblies. A substitute measure that then still allows the vehicle to be operated under emergency running conditions is initiated if a vehicle assembly fails. A performance quantity that is characteristic of the driving-dynamics situation in which the vehicle finds itself is recorded prior to initiating the substitute measure, and is compared to at least one limit value. The substitute measure is initiated if the limit value is exceeded or not attained. A device which includes a device for implementing such a method is also provided.

Method for the fail-safe operation of a hybrid vehicle for the controlled initiation of a substitute measure allowing an operation of the vehicle under emergency conditions, and device for implementing this method

The invention relates to a method for detecting combustion misfires in multi-cylinder internal combustion engines having several simultaneously igniting cylinders wherein, for each crankshaft rotation, rough running values are determined by measuring segment times, the segment times including the times, which correspond to the piston movement of individual cylinders after their ignition time point, wherein the crankshaft passes through an associated circular segment angular region. A combustion misfire is determined in the affected crankshaft circular segment regions from the determined rough running values LUT for crankshaft segment regions having several simultaneously igniting cylinders via a desired value comparison to a threshold value SW, which is lower in value than the threshold value SWfor the misfire check in crankshaft segment regions having individually igniting cylinders. For a combustion misfire in a crankshaft segment region having simultaneously igniting cylinders causing a misfire operation in one of these cylinders, a misfire operation is caused by a suitable engine intervention and by measuring the change of the rough running values in the crankshaft segment region having the simultaneously igniting cylinders, the cylinder is determined by the engine intervention which exhibits a combustion misfire without engine intervention.

Method for engine misfire detection in multi-cylinder internal combustion engines with multi-cylinder spark ignition

A method for determining the crankshaft position of an internal combustion engine is described with which, in the event of failure of the crankshaft sensor, the crankshaft position may be determined with relative precision at all times. For this purpose, the camshaft position is continuously detected by an absolute angle sensor, preferably in a defined time grid. By analyzing the camshaft positions detected in that way, a value for the instantaneous crankshaft position is determined.

Method of determining the crankshaft position of an internal combustion engine

A method for detecting combustion misfires in internal combustion engines on the basis of an evaluation of the segment times is introduced wherein a shaft of the engine passes over predetermined angular segments. The method is characterized by variable segment lengths and/or segment positions relative to a reference point of the movement of the pistons of the engine. The position of the angle segments and/or the segment length, that is, the angular expansion of the angular segments, is dependent upon operating parameters of the engine.

Detection of combustion misfiring

A method for detecting combustion misses in a multi-cylinder internal combustion engine. The control units of the engine use an engine control program which is interrupted by interrupt routines, in phase-synchronism with the rotational movement of the crankshaft, in which at least the data required for injection and firing are processed. The detection of combustion misses includes establishing and evaluating crankshaft segment times in which the crankshaft covers an associated circle-segment angle range. The crankshaft segment are also established and evaluated in particular interrupt routines, and for the further subset of cylinders in the interrupt routines in which their firing is controlled. Furthermore, the crankshaft segment times for the first cylinder is established and evaluated in certain additionally generated interrupt routines.

Method for detecting misfiring in a multi-cylinder internal combustion engine

A method for determining the load angle of a three-phase current synchronous machine with the aid of position information of an internal combustion engine. The latter is furnished with an engine control device, in which operating parameters and the position information of components of the internal combustion engine are stored. The following method steps are run through: First of all, the rotational position of the internal combustion engine is recorded in the engine control device when the internal combustion engine is switched off. Before the start of the internal combustion engine, the transmission of the rotational position information of the internal combustion engine to the electrical three-phase current machine takes place for the adjustment between the rotational position information and the load angle of the electrical three-phase current machine, at a rotational speed of the internal combustion engine of n&equals;0.

Method for deriving rotor angular orientation

Method for correcting an angle error of an absolute-angle detector that detects the angular position of a first shaft whose rotary movement is linked to a second shaft. The angular position of second shaft is first detected during at least one complete revolution of first shaft; the corresponding angular position of first shaft is derived from this value; the corresponding output value of absolute-angle detector is compared to the corresponding angular position of first shaft, and the difference formed by this comparison is stored. The corresponding output value of absolute-angle detector is then corrected by the stored value.

Method for correcting an angle error of an absolute-angle sensor

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

A method for detecting combustion misfires for internal combustion engines is introduced wherein an index for the rough running of the engine is formed and is compared to a threshold value. The threshold value is dependent upon the load of the engine. Exceeding the threshold value is evaluated as a misfire. The method is characterized in that the threshold value, in addition to being dependent upon the load, is also dependent upon the ignition angle and/or the lambda value or that the formation of the index for the rough running also takes place in dependence upon the ignition angle and/or on the lambda value; and/or that the activation/deactivation of the misfire detection is at least dependent upon the ignition angle and/or on the lambda value.

Method for detecting combustion misses

The invention relates to a device for detecting the reverse rotation of a rotating part of an internal combustion engine, having a crankshaft ( ) whose rotation, by means of a sensor ( ) and a detector disk ( ) which is connected to the crankshaft ( ) and has a reference mark ( ) and a multitude of similar angle marks ( ), are sent by the sensor ( ) to a control unit ( ) in the form of pulses, having a camshaft ( ) whose rotation is detected by means of an absolute angle detector ( ), wherein the output signal of the absolute angle detector ( ) steadily rises or falls within a period depending on the rotation direction of the camshaft . The output signal of the absolute angle detector ( ) is supplied to the control unit ( ) for processing. In order to detect reverse rotation of the internal combustion engine, three successive angle values &phgr;(k&minus;2), &phgr;(k&minus;1), &phgr;(k), are scanned from the output signal of the absolute angle detector ( ) and are compared to one another in an algorithm in such a way that in the event of a malfunction with reverse rotation, the equation: &phgr;(k)<&phgr;(k&minus;1)<&phgr;(k&minus;2) is true. If this condition is not fulfilled, no conclusion is drawn regarding reverse rotation.

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Muehlacker, Germany

Michael Lehner