Robert Boschgmbh

Seg Automotive Germany Gmbh

Matthias Cwik

Ewald Mauritz

Markus Roessle

Stefan Tumback

Sven Hartmann

Juergen Gross

Falco Sengebusch

Michael Bayer

Apostolos Tsakiris

Elias Calva

Roman Pirsch

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 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

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).

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Stuttgart, Germany

Matthias Cwik