Robert Boschgmbh

Siemens Aktiengesellschaft

Conti Temic Microelectronic Gmbh

Seg Automotive Germany Gmbh

Ewald Mauritz

Markus Roessle

Matthias Cwik

Stefan Tumback

Bernd Pfaffeneder

Heiko Buehring

Klaus-Dieter Meier

Werner Nitschke

Knut Balzer

Holger Wulff

Hans Bogenrieder

Juergen Gross

Falco Sengebusch

Karl-Otto Schmidt

Apostolos Tsakiris

Elias Calva

Hölger Wulff

Hans-Georg Bogenrieder

The invention relates to a method for actuating a starter device (), wherein the starter device () comprises a starting pinion () which is to be meshed with a toothed ring () of an internal combustion engine (), the internal combustion engine () having a drive shaft (). The invention is characterized in that a) first a rotational speed (n, n, n, n) of the drive shaft () is determined, b) said rotational speed (n, n, n, n) is then compared to a predefined rotational speed value (nG), and c) in the case that the rotational speed (n, n, n, n) is less than or equal to the predefined rotational speed value (nG), the starting pinion () is toed in the direction of the toothed ring ().

Method for meshing a starting pinion with a toothed ring of an internal combustion engine

A method for determining a future rotational speed of a rotating drive shaft of an internal combustion engine is described, in particular while the internal combustion engine coasts after being turned off, the future rotational speed being calculated from a course of measured rotational speeds. To predict a future rotational speed of the drive shaft of the internal combustion engine as accurately as possible, instantaneous rotational speeds measured at different rotational positions of drive shaft are evaluated.

Method and control unit for determining a future rotational speed

The invention relates to a method for meshing a starter pinion () of a starting device () into a ring gear () of an internal combustion engine (). The internal combustion engine () has a driveshaft (), and the starting device () has a starter motor (), said driveshaft () having a variable rotational speed (n). The internal combustion engine () is switched off in a method step (S1), and the starter pinion (), which is not being rotationally driven by the starter motor (), is then advanced in the direction of the ring gear () by a toe-in actuator () by means of a toe-in force (FV) in a method step (S2) until the starter pinion contacts the ring gear. A meshing force (FE) is then exerted onto the starter pinion () in a controlled manner in an additional method step (S3) in order to mesh the starter pinion () into a tooth gap () of the ring gear ().

Method for meshing a starter pinion of a starting device into a ring gear of an internal combustion engine

A method for actuating an element () in the air supply tract () of an internal combustion engine (), characterized in that the element () is actuated such that it opens the air supply tract () before the pinion () engages into the toothed ring () of the internal combustion engine ().

Method for actuating an element in the air supply tract of an internal combustion engine, in particular a throttle flap

Method for predicting a rotational speed (n) of a drive shaft () in an internal combustion engine (), wherein a past rotational speed (n) of the drive shaft () is determined, characterized in that in order to determine a theoretical rotational speed (nT, nT) of the drive shaft () at a future point in time (tT, tT), the change in the rotational speed (n) between two past events (P, P; P, P) occurring at different times is used, one rotational speed (n, n; n, n) and one point in time (t, t; t, t) being assigned to each event, wherein one point in time (t, t) is an earlier point in time and the other is a later point in time (t, t), which therefore lies before the predicted point in time (tT, tT), wherein a gradient (m) is determined for a period between the two events (P, P; P, P) and is used as the basis for deducing a theoretical future rotational speed (nT, nT) at the future point in time (tT, tT), such that in order to determine the theoretical rotational speed (nT, nT) of the drive shaft () at the future point in time (tT, tT), the determined gradient (m) is used to determine the theoretical rotational speed (nT, nT) at the future point in time (tT, tT), on the basis of the later point in time (t, t), thus determining whether the theoretical rotational speed (nT, nT) actually occurred before the future point in time (tT, tT) or not until afterwards.

Method for predicting a rotational speed of a crankshaft in an internal combustion engine

A method for detecting rotational speeds (n) of an internal combustion engine having a signal wheel having marks (Mthrough M) for signaling on a crankshaft of the internal combustion engine is described. The marks (Mthrough M) on the signal wheel are detected with the aid of a sensor and evaluated by a detection and evaluation device. To implement high-precision detection of a rotational speed, the rotational speeds (n) are evaluated using a sector section of approximately 6&#xb0; to 35&#xb0; to increase the accuracy on the basis of a reduced sector section of the signal wheel.

Control system and method for detecting the rotational speed of an internal combustion engine

A method determines a rotational speed of a driveshaft of an internal combustion engine. The rotating driveshaft assumes different rotary positions at different times. An average gradient of rotary speed for the driveshaft is determined at at least two rotary positions. Subsequently, an average rotational speed for the driveshaft is obtained from a past average gradient of rotary speed at at least one later point in time.

Method for determining a rotational speed of a driveshaft of an internal combustion engine

In a method for controlling a start/stop operation of an internal combustion engine in a motor vehicle, the controller activates a starting device which has a starter motor and a meshing device for the purpose of starting the internal combustion engine and of executing a start/stop operation, the rotational speed and position of a crankshaft of the internal combustion engine being detected with the aid of a detector device. To provide vehicle comfort in start/stop mode and to implement meshing of a starter pinion with the ring gear at a coasting rotational speed at reduced noise and wear, a point in time is determined for meshing with the ring gear of a coasting internal combustion engine after the internal combustion engine has been shut down.

Method and device for start/stop control of an internal combustion engine

The invention relates to a method for predetermining a motion state (BZn+1) of a drive shaft () of an internal combustion engine () on the basis of previous motion states (BZn, BZn&#x2212;2) of the drive shaft (), wherein properties (tn&#x2212;2, &#x3c9;n&#x2212;2) allocated to a first previous motion state (BZn&#x2212;2) and properties (tn, &#x3c9;n) allocated to a second previous motion state (BZn) are used and the drive shaft () assumes periodically recurring angular positions (&#x3c6;n&#x2212;2, &#x3c6;n, &#x3c6;n+2; &#x3c6;n&#x2212;1, &#x3c6;n+1). The invention is characterized in that a future motion state (BZn+1) and the properties (tn&#x2212;1, &#x3c6;n+1) allocated thereto of the drive shaft () are determined in an angular position on the basis of the first evaluated previous motion state (BZn&#x2212;2) and the second evaluated previous motion state (BZn), wherein the angular position (&#x3c6;n+1) of the determined future motion state (BZn+1)of the drive shaft () is not equal to an angular position (&#x3c6;n&#x2212;2, &#x3c6;n) of the first and second previous motion state (BZn, BZn&#x2212;2).

Method for predetermining a motion state of a drive shaft of an internal combustion engine

A bus station for connection to a bus system for a restraining device and/or sensor is used for muting a defective bus station or to have automatic error management carried out in the bus station, to enable the bus station to transmit properly again. For this purpose, the transmitting current and/or the power consumption of the bus station is monitored. The transmitting stage is triggered and, if appropriate, isolated from the bus station as a function of this monitoring. In a refinement a backup transmitting stage may be connected as a replacement for the defective transmitting stage.

Bus station connection to a bus system for restraining means and/or sensors

A bus master for a bus for connection of sensors and/or an ignition means device, which has at least two bus driver arrangements allowing data to be received independently of one another. For this purpose a polling operation, specifically using a multiplexer or a demodulator associated through one of the particular bus driver arrangements, is used. Furthermore, a state machine is provided, which also alternatingly determines the system status on the basis of the measured quantities determined on the bus conductor for the particular bus driver arrangement. In a refinement, a particular bus driver may have a dedicated processor for system status determination.

Bus master for a bus for connection of sensors and/or ignition means

The error-free function of modules in a bus system with a central unit is tested. First, all (error-free) modules are set into a silent operating mode in response to an agreed silence-command, and then in this silent operating mode it is tested whether all modules still remain silent, i.e. do not transmit data, in response to an agreed data request allocated to these modules. A module that nonetheless transmits data is recognized as faulty and is deactivated. Subsequently, all modules except for a module to be tested are set into the silent operating mode, and then it is tested whether this test module transmits its data in response to the agreed data requests allocated to it and remains silent in response to the data requests not allocated to it. Additionally, the position of the return-transmitted data can be determined and compared with a nominal position.

Method and device for checking the error-free function of modules in a bus system comprising a central unit

A sensor adapted for connection to a bus and a method for supplying power to a sensor connected to a bus are described, which serve to minimize the power consumption of a sensor connected to the bus. To this end, power for a sensor is stored in an energy storage device in a first time period and is discharged in a second time period, that is, the measurement time, in order to supply the sensor element with power. A capacitor is used as the energy storage device, and the charging of the capacitor is monitored by a voltage monitoring device.

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Weissach, Germany

Ewald Mauritz