DE102008013411A1 - Motor vehicle operating method, involves triggering stop process for internal-combustion engine, detecting terminating condition during stop process by start-stop-control unit, and canceling stop process when terminating condition exists - Google Patents

Abstract

The invention relates to a method for operating a motor vehicle (10), comprising an internal combustion engine (12), a starting device (40) for starting the internal combustion engine (12) and a start-stop control device (30) for controlling the internal combustion engine (12). and the starting device (40) is equipped, and a motor vehicle. According to the invention, the following steps are provided: generating a stop request for the internal combustion engine (12), initiating the stop operation for the internal combustion engine (12), detecting at least one termination condition during the stop operation by means of the start-stop control device (30), stopping the stop operation when present at least one termination condition.

Description

The Invention relates to a method for operating a motor vehicle, that with an internal combustion engine, a starting device for starting the Internal combustion engine and a start-stop control device for driving the internal combustion engine and the starting device equipped is, as well as a motor vehicle.

Of the Use of start-stop control devices in motor vehicles, which are equipped with internal combustion engines is known. A start-stop control device allows one from the driving state the motor vehicle dependent, automatic shutdown and automatic commissioning of the internal combustion engine to an economical To ensure operation of the motor vehicle. The driver of the motor vehicle must be informed about the operation of the basic functions (gas, Brake, clutch, gear shift) of the motor vehicle not to become active. An automatic shutdown of the internal combustion engine is made especially when no drive power of the internal combustion engine must be applied. In a motor vehicle, which is equipped with a manual transmission, occurs such a driving condition, when the motor vehicle is actuated Coupling, that is with separate power transmission between internal combustion engine and drive wheels, a predetermined Minimum speed for a given period of time below. This driving condition can, for example, while waiting occur at a traffic light. An automatic starting of the internal combustion engine in particular by releasing the service brake or the Parking brake or triggered by pressing the accelerator pedal, without the driver taking additional measures or actions. The start-stop control device takes effect on the energy and / or fuel supply of the internal combustion engine as well on a starting device that provides the necessary kinetic energy provides to the internal combustion engine starting from standstill to bring to a minimum speed, from which an autonomous operation and a power output of the internal combustion engine possible is.

From the EP 1 541 864 B1 a method for automatically starting an internal combustion engine in a motor vehicle is known, in which the internal combustion engine is temporarily switched off in certain driving states for fuel saving and is restarted when a change of driving condition by a brake pedal operation. In this case, the rate of change for the brake pedal pressure is analyzed and sent a start signal to the starter of the internal combustion engine when the rate of change exceeds a threshold.

The DE 102 11 466 C1 discloses a method for automatically shutting down and starting an internal combustion engine of a motor vehicle. The automatic shutdown and / or starting takes place in dependence on predetermined engine stop or engine start conditions. An engine stop condition exists when a speed of the motor vehicle is below a certain limit speed. An engine start condition exists when no gear is engaged and the engine temperature has risen above a certain value. As other engine start conditions are the operation of the accelerator pedal, the release of the service brake, the operation of the clutch, the touch or moving a gearshift lever.

The The object of the invention is a method for operating a motor vehicle and a motor vehicle to provide the facilitate a more comfortable use of the start-stop functions.

These The object is achieved by a method having the features of the claim 1 and by a motor vehicle with the features of claim 10 solved. Advantageous developments of the invention are the subject of dependent claims.

According to the invention provided that first a stop request for the internal combustion engine is generated. The stop request can be through the change of driving condition, in particular by falling below a predefinable minimum speed when operated the clutch pedal to interrupt the power flow when the gear is engaged, be caused. The change of driving condition is caused by the Start-stop control device detected and predeterminable if available Conditions interpreted as stop request. In the presence of a Stop request directs the start-stop control the stop process for the internal combustion engine. The internal combustion engine can for example by switching off the fuel supply (all engine types) and / or by switching off the ignition energy (spark-ignited Engines, especially gasoline engines) are brought to a standstill. From a standstill, the internal combustion engine by means of the starting device, which is preferably an integrated starter generator (integrated starter generator - ISG), in particular by one belt-driven ISG (belt-driven integrated starter generator - B-ISG) is, brought back to a minimum speed, from the through Supply of fuel and possibly ignition energy an autonomous Continue running and a power output of the internal combustion engine possible is.

Depending on the traffic situation, the driving state can sometimes already change during the stopping process of the internal combustion engine. in the In particular, after the stop request has been issued by the start-stop control device and when the stop process has already been initiated, rapid acceleration of the motor vehicle by the driver may be desired. By means of the method according to the invention, the stopping process can be stopped under certain conditions in order to be able to provide the full power of the internal combustion engine as quickly as possible.

One such termination of the stop process, for example, when stopping of the motor vehicle occur at an intersection. Depending on the traffic situation the motor vehicle can not enter directly into the intersection, but must be stopped before crossing. If the motor vehicle with equipped with a manually operated transmission, In this driving situation, the clutch pedal is actuated and / or it is inserted using the gear lever, the idle, to the power transmission between the engine and drive wheels to interrupt. Pressing the clutch pedal or the insertion of the idle at low or reduced to zero Speed of the motor vehicle is controlled by the start-stop control device as a stop request for the implementation of the Stop operation interpreted. Will the driver in the period in which the stopping process takes place, d. H. while the internal combustion engine stopped from an operating speed or idle speed is, go, so he needs the drive power of the internal combustion engine as soon as possible. With the invention Procedure, the stopping process is interrupted, so that the drive power can be made available at short notice and one ensures comfortable and safe driving on the motor vehicle is.

• – Gangwahlhebel ist nicht in Neutralstellung (Gang eingelegt), Kupplungspedal ist betätigt und Bremspedal wird aus der Betätigungsstellung in Richtung der Neutralstellung bewegt (Fahrer nimmt Fuß vom Bremspedal);
• – Gangwahlhebel ist nicht in Neutralstellung (Gang eingelegt), Kupplungspedal ist betätigt und Gaspedal wird betätigt;
• – Kupplungspedal wird betätigt, insbesondere zum Einlegen eines Gangs mittels des Gangwahlhebels;
• – Kupplungspedal ist betätigt und Gangwahlhebel wird betätigt, insbesondere aus einer Leerlaufstellung in eine Antriebsstellung.

In an embodiment of the invention it is provided that determines the termination condition based on at least one of the start-stop control device to be detected state from the group: actuation position and / or actuation speed of an accelerator pedal and / or a clutch pedal and / or a brake pedal and / or a gear selector lever becomes. In the operating position, the corresponding pedal or the gear selector lever is deflected from an unactuated neutral position. In particular, a distinction can be made between a blank operation and a function operation. An empty operation of a pedal or the gear selector lever is present, although a deflection has taken place from the neutral position, without this already being an influence on the driving condition of the motor vehicle is taken. In the function operation, the associated with the corresponding pedal or gear selector lever function is effected, for example, the brake pedal occurrence of a braking force on the wheels or the clutch pedal, a partial or complete disconnection of the clutch. A termination of the stop process is only at predeterminable operating positions and / or operating speeds of the respective operating elements, in particular at predetermined combinations of the positions of the controls, made. As an example, a stop process is aborted for the following combinations:

• - gear selector lever is not in neutral position (gear engaged), clutch pedal is depressed and brake pedal is moved from the operating position toward neutral (driver takes his foot off the brake pedal);
• - gear selector lever is not in neutral position (gear engaged), clutch pedal is depressed and accelerator pedal is depressed;
• - Clutch pedal is operated, in particular for engaging a gear by means of the gear selector lever;
• - Clutch pedal is actuated and gear selector lever is actuated, in particular from an idle position to a drive position.

at All the above combinations of operating positions It can be assumed that the driver immediately reverses the vehicle want to start moving again, allowing a quick deployment of driving power by the internal combustion engine desirable is. As other indicators, the rapid stop of the stop Can cause internal combustion engine come, for example, the Actuation of the steering wheel, in particular for implementation a maneuvering, or releasing the parking brake, alone or in combination with the aforementioned operating positions the controls in question.

In Another embodiment of the invention is provided that the stop process is canceled when the operating position and / or Actuation speed of the accelerator pedal and / or the brake pedal deviates from a predefinable value. A unique termination condition lies in the operation of the accelerator pedal, which also serves as an accelerator pedal is designated as the driver hereby unambiguously a Provision of power by the internal combustion engine requests. Likewise, a discharge of the brake pedal, in particular with an operating speed, which is above a predetermined threshold, as a termination condition Serve, as it is assumed that the driver in a quick release the brake plans a quick startup. This is special then the case, if at the time of pressing the accelerator pedal or of releasing the brake the clutch is actuated and already a gear is engaged.

In a further embodiment of the invention, it is provided that the stop process is not canceled when the operating position and / or operating speed of the clutch pedal deviates from a predefinable value and a gear is engaged or a gear is engaged. If during a stop operation, the clutch pedal is moved from a fully penetrated position in the direction of the neutral position and a gear is engaged, it is assumed that the driver wants to stop the vehicle and does not want to reboot. In this situation, it would be inconvenient if an abort of the stop process took place, since the driver does not expect that the internal combustion engine will continue to run.

In Another embodiment of the invention is provided that a demolition the stopping operation by providing fuel and / or ignition energy takes place, if the internal combustion engine over a speed having a predetermined minimum speed. The stop process takes place by interrupting the fuel supply and / or the ignition energy for the internal combustion engine. Spark-ignition internal combustion engines, in particular Otto engines, can by switching off the Ignition energy to be stopped. Internal combustion engines without spark ignition, In particular, diesel engines, are shut down by the fuel supply stopped. Preferably also in spark-ignited internal combustion engines Interruption of fuel supply in addition to interruption the ignition energy made. As long as the speed of the internal combustion engine during the stop above a predefinable minimum speed can, in a simple way by providing fuel and / or ignition energy continued running of the internal combustion engine be ensured without any kinetic energy of a starting device must be provided. A break of the stopping process without supply of kinetic energy we also as termed passive termination.

In Another embodiment of the invention is provided that a demolition the stopping operation by providing fuel and / or ignition energy and by activating the starting device takes place, in particular If the internal combustion engine has a speed below a predetermined Has minimum speed. By activating the starting device, which is preferably designed as an electric motor and by control by the start-stop control device with electrical energy can be supplied, the internal combustion engine kinetic energy made available. Along with the deployment Of fuel and possibly ignition energy is thus a rapid Reaching the idle speed or a higher speed allows. This is especially necessary if the speed of the internal combustion engine during the stop process has already dropped below a predetermined minimum speed, below derer alone by providing fuel and possibly ignition energy no restart of the internal combustion engine is to be expected. at suitable design of the starting device, this can also be achieved idle speed or beyond, so that in addition to the rapid startup for the torque of the internal combustion engine and the torque of the starting device is available.

In Another embodiment of the invention is provided that the demolition of the stop process when the minimum speed is undershot as a restart immediately, in particular in a predefinable time interval, after completion Standstill of the internal combustion engine takes place. If an abort condition first Detected shortly before the end of the stop, it may be cheaper be, the complete stoppage of the internal combustion engine wait and then within a predetermined time interval a make regular restart of the internal combustion engine. Depending on the operating condition, the restart can be a fast synchronization the fuel supply and optionally the ignition energy ensure with the crankshaft position of the engine.

In Another embodiment of the invention is provided that the load on the internal combustion engine during the stop process at least is temporarily increased to a rapid stop guarantee. The increase of the load on the internal combustion engine can in particular by driving the starter generator means the start-stop control device are made. Preferably The starter generator is driven so that an increased conversion from kinetic energy into electrical energy takes place, thereby exerted an increased braking torque on the internal combustion engine which stops faster.

In a further embodiment of the invention, it is provided that the predefinable minimum speed is determined on the basis of at least one parameter from the group: cooling water temperature, air mass, oil temperature, load state of the internal combustion engine. The minimum speed, above which further running of the internal combustion engine is possible only by renewed provision of fuel and possibly ignition energy, varies depending on the parameters influencing the combustion, such as cooling water temperature, air mass, oil temperature. With cold cooling water and low oil temperature, the minimum speed is higher than with warm cooling water and high oil temperature. The load state of the internal combustion engine can vary by the energy requirement of ancillaries such as a compressor for an air conditioner, so also varies the minimum speed for the internal combustion engine, since at high load, a higher minimum speed must be present to continue to run the engine without supply of kinetic energy. The load state may be determined by the start-stop control device be detected. Taking into account the parameters influencing the combustion, the minimum rotational speed can then be calculated, below which an application of the starting device is necessary in order to ensure reliable continued running of the internal combustion engine when the stop process is stopped.

According to one Another aspect of the invention is a motor vehicle with an internal combustion engine and a starting device for starting the internal combustion engine, a start-stop control device for controlling the internal combustion engine and the starting device, which is to carry out the method according to any one of claims 1 to 9 set up is.

In Another embodiment of the invention is provided that the starting device as integrated starter generator (integrated starter generator, ISG), in particular as a belt-coupled integrated starter generator (belt driven ISG, B-ISG). An integrated starter generator takes over both the function of the generator to generate electrical energy as well as the starter for providing kinetic energy for the starting process of the internal combustion engine. The integrated starter generator is preferably a drive belt, z. B. one Timing belt, coupled with the crankshaft of the internal combustion engine or is flanged directly to the crankshaft. The integrated Starter generator is preferably in constant force-transmitting Connection with the internal combustion engine and thus (in particular unlike a standard starter motor with pinion engagement in a flywheel) at any given time kinetic energy provide to the internal combustion engine. It is also conceivable, the force-transmitting Connection between integrated starter generator and internal combustion engine by means of a switchable or speed-dependent coupling device separable, with an immediate provision here as well can be ensured by kinetic energy.

Further Advantages and features of the invention will become apparent from the claims as well as from the following description of advantageous embodiments, which are illustrated by the drawings. Showing:

1 a schematic representation of a motor vehicle with an internal combustion engine, an integrated belt-driven starter generator and a start-stop control device,

2 a flowchart illustrating the start-stop method.

In the 1 is a motor vehicle 10 with the essential components that play a role in the implementation of a start-stop method with the ability to cancel the stop process, shown schematically. Further to the operation of the motor vehicle 10 necessary components are not shown for clarity.

The car 10 has an internal combustion engine 12 on that via a coupling device 14 with a manual transmission 16 is connected to the drive wheels 18 are flanged. One from the internal combustion engine 12 Torque delivered is when the clutch is closed 14 with the help of the manual transmission 16 in an output torque for the drive wheels 18 implemented and thus allows the locomotion of the motor vehicle 10 ,

An influence on the driving speed of the motor vehicle 10 finds about the setting of the engine 12 provided power and the selection of the appropriate gear setting or gear selection (forward gears, reverse gear) instead. These settings are made using familiar controls such as accelerator pedal 20 and gear selector lever 22 that are operated by the driver. A clutch pedal 24 serves to control the clutch 14 via an adjusting device, not shown, and thus for separation and restoration of the power flow between internal combustion engine 12 and manual transmission 16 , The operation of the clutch pedal 24 disconnects the clutch 14 and thus allows the insertion of different gears. An influence on the speed of the motor vehicle 10 can also by means of a brake pedal 26 be made, the brake lines on a non-illustrated, the drive wheels 18 assigned brake system acts.

The operating positions of the controls 20 . 22 . 24 . 26 are detected by means of sensors, not shown, their signals via signal lines 28 to a start-stop control device 30 be transmitted. By time derivative of the operating positions and the operating speeds for the controls 20 . 22 . 24 and 26 be determined. The start-stop control device 30 is via additional control lines 28 with components like a battery monitoring system 32 , an ignition controller 34 , a fuel injection device 36 and one of the internal combustion engine 12 associated sensor arrangement 38 connected. The control device 30 can also process values derived from these components and issue control commands to those components.

The schematically illustrated sensor arrangement 38 on the internal combustion engine includes sensors such as a speed sensor, an air mass meter, a cooling water temperature sensor, a Oil temperature sensor and / or other sensors for determining operating characteristics of the internal combustion engine 12 ,

The internal combustion engine 12 is an integrated starter generator 40 assigned by a belt 42 permanently with the crankshaft, not shown, of the internal combustion engine 12 coupled (belt-driven integrated starter generator - B-ISG). The starter generator 40 is electrically connected to the start-stop control device and to a battery 44 connected, which is used as energy storage for electrical energy. The starter generator 40 serves in its function as a starter for providing kinetic energy to the internal combustion engine 12 to accelerate from standstill to a minimum speed, starting from an independent operation of the internal combustion engine 12 is possible. In its function as a generator, the starter generator transforms 40 kinetic energy of the internal combustion engine 12 into electrical energy around in the battery 44 is stored. The control or regulation of the starter generator 40 to be provided kinetic energy or the electrical energy to be converted by the start-stop control device 30 performed. The starter generator 40 is dimensioned so that it even when the internal combustion engine 12 can provide an assist torque to improve an acceleration of the motor vehicle or even to a purely electrical locomotion of the motor vehicle 10 especially at low speeds.

The start-stop control device 30 is arranged such that an automatic shutdown and starting the internal combustion engine 12 can be made. A shutdown of the internal combustion engine 12 is provided when the internal combustion engine 12 no power to the drive wheels or to consumers such as a timing belt-coupled air conditioning compressor for a predeterminable period of time 46 must give up.

To an economical and environmentally friendly operation of the motor vehicle 10 to ensure, in the presence of one or more of the conditions listed below, a stop request is generated in the start-stop control device and for controlling the internal combustion engine 12 , the ignition controller 34 , the fuel injector 36 and the starter generator 40 used, in particular to the fuel supply and / or the ignition energy supply to the internal combustion engine 12 to interrupt.

The start-stop control device 30 checks in particular whether, after falling below a minimum speed of the motor vehicle 10 the operating position and / or operating speed of the accelerator pedal 20 and / or the clutch pedal 24 and / or the brake pedal 26 and / or the gear selector lever 22 is within a predeterminable value range such that a stop request makes sense.

That in the 2 The method illustrated by the flowchart distinguishes, based on the stop signal, to the internal combustion engine 12 , in particular to the ignition controller 34 and / or the fuel injection device 36 is directed, two operating states of the internal combustion engine 12 ,

The first operating state is present as long as the internal combustion engine 12 during the stop process, so after switching off the fuel supply and / or the ignition energy still has a speed that continues to supply without provision of fuel and ignition energy without switching the starter generator 40 allows. As long as this is the case, the left path of the flowchart can be followed. If an abort condition occurs, then the stop process of the internal combustion engine 12 terminated by provision of fuel and possibly ignition energy. Optionally, the continued running of the internal combustion engine 12 be favored by a short-term load reduction, for example, by the starter generator 40 at least for a short time does not convert kinetic energy into electrical energy and / or the air conditioning compressor 46 is briefly disengaged.

If the speed has already fallen so far during the stop process that, if fuel and possibly ignition energy are provided, there is no further running without the starter generator being switched on 40 is possible, the right path of the flowchart is according to the 2 pursue. As long as the speed of the internal combustion engine is greater than zero, the stop process can still be canceled. As soon as an abort condition exists, the load on the internal combustion engine 12 increased and this comes now quickly to a halt. Subsequently, a restart is carried out immediately in order to achieve the full power of the internal combustion engine in as short a time as possible 12 to be able to make available again.

In an embodiment of the invention, not shown, an additional distinction may be provided by falling below the minimum speed of the start-stop control device 30 It is checked whether stopping the stop process faster and safer by immediate activation of the starter generator 40 and provision of fuel and possibly ignition energy or by complete braking and restart can be achieved.

In a further, not shown embodiment can be provided that the starter generator 40 is activated in any form of start abort, so even if the internal combustion engine is still running. The starter generator 40 thus ensures a safe restart of the engine at each engine speed 12 and provides additional torque for rapid acceleration of the motor vehicle 10 to disposal.

following By way of example, some situations are described in which one Termination condition is met and a stop is canceled.

A stop process for the internal combustion engine 12 is aborted when the driver approaches an intersection, the motor vehicle 10 brought to a standstill by braking and when the brake pedal is depressed 26 stops at a standstill while the clutch 24 operated so that it completely separates. In addition, a gear is engaged, that is, that the gear selector lever is not in the neutral position. After a specifiable standstill period of the motor vehicle 10 decides the start-stop control device 30 that the internal combustion engine 12 is to be stopped and outputs a stop signal for interrupting the fuel supply and the ignition energy. Thereupon, the stopping process begins, in which the internal combustion engine 12 Depending on the load condition and other boundary conditions as the oil temperature comes to a standstill after some time. Will during the stop process, the brake pedal 26 partially or completely solved, in particular with an operating speed which is above a predeterminable minimum value, this may be from the start-stop control device 30 be detected. If there are other boundary conditions, for example, that the clutch 24 is still fully actuated, so a termination condition is met and the start-stop control device 30 initiates action to stop the stop and to provide rapid power delivery by the engine 12 to ensure. This can be done in a passive manner by providing fuel and ignition energy when the speed of the internal combustion engine 12 still high enough to continue without activation of the starter generator 40 is. This may alternatively be done in an active manner by activating the starter generator 40 take place when either the minimum speed of the internal combustion engine 12 is below or if the starter generator 40 generally activated at a stop of the stop.

In another situation, stop braking occurs when the gear is engaged and the clutch pedal is depressed 24 instead, when the driver presses the accelerator 20 actuated. The operation of the accelerator pedal 20 In this situation, even if the brake pedal stops, it stops the stop 26 is actuated, since the motor vehicle 10 possibly on a slope and the driver with one foot both the accelerator pedal 20 as well as the brake pedal 26 actuated.

In another situation, the stopping operation is stopped when the gear selector lever is in the neutral position and the driver depresses the clutch pedal 24 fully activated. By the complete operation of the clutch pedal 24 the driver indicates that he wants to engage a gear and drive away, so that here too a rapid power delivery by the internal combustion engine 12 is desired.

In the same way, when the clutch pedal is already fully engaged, it is also possible to engage a gear with the aid of the gear selector lever 22 be defined as a termination condition for the stop process.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1541864 B1 [0003]
• - DE 10211466 C1 [0004]

Claims (11)

Method for operating a motor vehicle ( 10 ), which with an internal combustion engine ( 12 ), a starting device ( 40 ) for starting the internal combustion engine ( 12 ) and a start-stop control device ( 30 ) for controlling the internal combustion engine ( 12 ) and the starting device ( 40 ), characterized by the steps of: - generating a stop request for the internal combustion engine ( 12 ), - initiating the stopping process for the internal combustion engine ( 12 ), - detecting at least one termination condition during the stop operation by means of the start-stop control means ( 30 ), - Cancel the stop process in the presence of at least one termination condition. Method according to Claim 1, characterized in that the termination condition is determined on the basis of at least one of the start-stop control means ( 30 ) to be detected from the group: operating position and / or operating speed of an accelerator pedal ( 20 ) and / or a clutch pedal ( 24 ) and / or a brake pedal ( 26 ) and / or a gear selector lever ( 22 ) is determined. A method according to claim 2, characterized in that the stop process is aborted when the operating position and / or operating speed of the accelerator pedal ( 20 ) and / or the brake pedal ( 26 ) deviates from a predefinable value. A method according to claim 2, characterized in that the stop operation is not canceled when the operating position and / or operating speed of the clutch pedal ( 26 ) deviates from a predefinable value and a gear is engaged or a gear is engaged. Method according to one of the preceding claims, characterized in that a termination of the stop process by providing fuel and / or ignition energy takes place, provided that the internal combustion engine ( 12 ) has a speed above a predetermined minimum speed. Method according to one of claims 1 to 5, characterized in that an interruption of the stop process by providing fuel and / or ignition energy and by activating the starting device ( 40 ) takes place, in particular when the internal combustion engine ( 12 ) has a speed below a predetermined minimum speed. Method according to one of the preceding claims, characterized in that the termination of the stop process falls below the minimum speed as a restart immediately, in particular in a predeterminable time interval, after complete stoppage of the internal combustion engine ( 12 ) he follows. Method according to Claim 7, characterized in that the load on the internal combustion engine ( 12 ) is at least temporarily increased during the stop, to ensure a rapid stop. A method according to claim 5 or 6, characterized in that the predetermined minimum speed based on at least one parameter from the group: - cooling water temperature - air mass - oil temperature - load state of the internal combustion engine ( 12 ). Motor vehicle ( 10 ) with an internal combustion engine ( 12 ) and a starting device ( 40 ) for starting the internal combustion engine ( 12 ), characterized by a start-stop control device ( 30 ) for controlling the internal combustion engine ( 12 ) and the starting device ( 40 ), which is adapted to carry out the method according to one of claims 1 to 9. Motor vehicle according to claim 10, characterized in that the starting device ( 40 ) is designed as an integrated starter generator, in particular as a belt-coupled integrated starter generator.