DE102017204308A1 - Start-stop device for initiating an automatic startup of an automatically shut down prime mover - Google Patents

Abstract

The invention relates to a start-stop device and a corresponding method for initiating an automatic startup process of an automatically disconnected prime mover of a motor vehicle, in particular of a motor vehicle with automatic transmission, with a Anschaltlogik, by automatically turning on the automatically switched off when driving the motor vehicle at continue to be moved vehicle, when a release of the brake pedal is detected. Furthermore, the start-stop device comprises an on-off prevention logic, which prevents an automatic turn on the drive machine when releasing the brake pedal, if a preceding traffic object that presumably requires a stop of the motor vehicle, is detected and if it is determined that the motor vehicle when the prime mover is still switched off, it presumably comes to a standstill behind the preceding traffic object in a defined distance range.

Description

The invention relates to a start-stop device and a corresponding method for initiating an automatic startup process of an automatically disconnected prime mover in a motor vehicle according to the preamble of patent claim 1 and of patent claim 10.

In principle, internal combustion engines are usually switched off manually by means of an ignition key by the driver. An exception is a method which is described in the DE 100 23 331 A1 is presented. In this case, the brake pedal position or the brake pedal pressure is evaluated instead of the ignition key. The switching off of the internal combustion engine is initiated when the brake pedal is more strongly actuated in its already actuated position before or after reaching the standstill of the motor vehicle. To continue driving the brake pedal is released and pressed the accelerator pedal, after which a start of the internal combustion engine is initiated. A disadvantage of such methods that alone the motor vehicle driver is responsible for switching off the internal combustion engine. Analyzes of today's driving behavior show that despite increased environmental awareness and increased fuel prices, a manual shutdown of the engine, z. B. at traffic lights, rarely independently.

In order to reduce fuel consumption and pollutant emissions, methods and systems are currently already used in many vehicles, which automatically shut down the engine of a motor vehicle under certain conditions or in the presence of predetermined shutdown conditions and automatically turn on again in the presence of predetermined Anschaltbedingungen. Such methods and systems or start-stop devices are particularly suitable for city traffic to reduce fuel consumption, since in city traffic, the vehicle often stops at traffic lights or traffic and the operation of the internal combustion engine is not required.

Such a method is, for example, from the DE 10 2008 061 790 A1 known. In this case, the internal combustion engine is automatically switched off when the vehicle is braked to a standstill and held by operating the brake pedal at a standstill. Further, an automatic starting of the internal combustion engine when releasing the brake pedal can be prevented here, when the brake pedal is stepped amplified when the internal combustion engine is switched off. A re-start then takes place only when the accelerator pedal is actuated or when a timely operation of the accelerator pedal is detected by means of a footwell monitoring unit.

From the DE 10 2012 217 899 A1 a method for automatically shutting down and starting a prime mover by means of a start-stop device is known, which shuts down the prime mover at speeds greater than zero, when the accelerator pedal is released or dissolved and no (near-time) brake pedal operation is detected or suspected, and which automatically switched off engine starts again when a timely accelerator pedal operation or brake pedal operation is detected or suspected by means of a footwell monitoring unit.

Next is from the DE 10 2010 034 554 A1 a system for switching off and starting an engine is known, wherein the engine is turned off while driving when the speed is less than a predetermined limit speed and the brake pedal is actuated. The engine is restarted whenever the driver's foot has released the brake and / or when the throttle position is greater than zero.

From the post-published DE 10 2016 207 280 A1 is a system for initiating an automatic startup of a shutdown when the vehicle is driving engine known, wherein the starting of the engine depending on a detected desired by the driver driving dynamics, which is derived for example from the release speed of the brake pedal known.

The object of the invention is now to provide an improved system, which in a simple and cost-effective manner, an automatic switching on a previously - when the vehicle - automatically shut off the drive machine according to the wishes of the driver.

This object is achieved by a start-stop device according to claim 1 and a corresponding method according to claim 10. Advantageous developments are the subject matters of the dependent claims.

In the start-stop device according to the invention for initiating an automatic startup of an automatically disconnected prime mover of a motor vehicle, in particular a motor vehicle with automatic transmission, it is initially assumed that the start-stop device comprises an on-hook logic, by the automatic turning on a driving Motor vehicle automatically switched off prime mover is veran veranbar in still moving motor vehicle.

A corresponding automatic switch-off can take place by means of an existing switch-off logic, by which an automatic switch-off end of the drive machine can be initiated or initiated when the motor vehicle is moving, if a (defined) brake pedal actuation is detected. A (defined) brake pedal operation may, for example, be a sufficient brake pedal operation. To detect a sufficient brake pedal actuation, for example, the brake pedal position and / or the applied brake pressure and / or the induced braking torque can be evaluated in brake pedal operation. As a further prerequisite for initiating an automatic switch-off process, it may be predetermined, for example, that the speed of the vehicle must be less than a fixed or variably defined speed threshold (eg 15 km / h) before an automatic switch-off process can be initiated. The term prime mover may be understood to mean any prime mover that provides power for propelling the vehicle. In particular, it may be an internal combustion engine.

The invention is further based on the finding that, when the drive machine is automatically switched off when the brake pedal is actuated, a restarting of the drive machine during release of the brake does not always correspond to the driver's request or does not make sense for energy efficiency reasons. For example, automatically releasing the engine when releasing the brake would contradict the braking behavior of drivers who want to roll over to a stationary object or a red traffic light with the prime mover switched off, completely removing the foot from the brake. Also not always expedient would be a power-on logic, which only when the accelerator pedal (or suspected actuation of the accelerator pedal) leads to an automatic turn on the prime mover, as this is too late in certain traffic situations or operating situations of the driver's tool.

The basic idea of the invention is now to provide a start-stop device which is set up to permit or to initiate automatic activation of the drive machine automatically switched off when the motor vehicle is moving while the motor vehicle continues to move, if taking into account the traffic situation and / or the operating situation of the motor vehicle is detected that turning on the prime mover appears desirable and appropriate.

In order to be able to provide a system which follows the basic idea, it is provided according to the invention that the start-stop device described above comprises an on-off prevention logic which prevents an automatic start-up of the prime mover that can be initiated by the on-hook logic, if a preceding traffic object that stops the vehicle Motor vehicle presumably requires, is detected and if it is determined that the motor vehicle presumably comes in a defined distance range behind the vorbefindlichen traffic object comes to a standstill with still switched-off prime mover.

In analogous application of the basic idea to a corresponding method for initiating an automatic startup procedure of an automatically switched off prime mover of a motor vehicle, in particular of a motor vehicle with automatic transmission, an automatic starting of the motor vehicle automatically switched off when the vehicle is still being moved, if a (defined) Detecting the brake pedal is detected, it is provided that an automatic turning on the drive machine when releasing the brake pedal of the motor vehicle is automatically shut down driving machine is prevented while the vehicle is still moving, if a vorausbefindliches traffic object that presumably requires a stop of the motor vehicle is detected, and if it is found that the motor vehicle presumably in a defined distance range behind the anticipated traffic with the prime mover still switched off sobjekt comes to a halt.

Advantageous developments of the device according to the invention also apply in a corresponding manner to the method according to the invention.

The preceding traffic object may be a "preceding" road user in the driving trajectory of the own motor vehicle, which is identifiable by means of appropriate sensors and / or data transmission. Alternatively or additionally, it can also be a traffic sign which is relevant for the motor vehicle and presumably requires a stop of the motor vehicle (eg stop sign) and / or a light signal system relevant for the motor vehicle, which due to the current or a ( known or suspected) to be reached near operating condition, a stop of the motor vehicle probably requires.

Advantageously, the start-stop device is further set up that, in order to determine whether the own motor vehicle presumably comes to a standstill within a defined distance range behind the preceding traffic object while the prime mover is still switched off, information determined with a suspected standstill position of the own motor vehicle and a suspected one or known position of the preceding relevant traffic object at the time of Achieve the standstill position of the motor vehicle at least correlate, be taken into account.

In order to determine whether the motor vehicle, with the drive unit still switched off, presumably comes to a standstill within a defined distance range behind the preceding road user and / or determines the information that at least correlates with the presumed standstill position of the motor vehicle, information about the kinetic energy of the motor vehicle, in particular Information about the kinetic energy of the motor vehicle at the time at which an automatic startup of the prime mover is to be caused by the Anschaltlogik or information about the kinetic energy of the motor vehicle at the time of defined release of the brake pedal is determined and taken into account. This is particularly advantageous since the kinetic energy of the motor vehicle has a significant influence on the further movement of the vehicle when the engine is switched off.

In a further advantageous embodiment of the invention, the start-stop device is advantageously designed such that to determine whether the motor vehicle presumably in a defined distance range behind the leading road user comes to a standstill with the drive unit still switched off and / or to determine the information correlate with the suspected standstill position of the motor vehicle at least, information about the inclination of the road or the motor vehicle, in particular information about the current or assumed future inclination of the motor vehicle are taken into account. Thus, an improved determination of the standstill position of the motor vehicle and possibly the object ahead can take place. The information about the inclination of the vehicle or the roads can z. B. by means of a suitable tilt detection sensor and / or from the data of digital cards and / or transmitted back-end data and / or transmitted Car-to-X-communication data are obtained.

In order to be able to determine the presumed position of the preceding road user, which is relevant for determining whether the motor vehicle presumably comes to a standstill within a defined distance range behind the preceding road user when the drive unit is still switched off, advantageously present information of the preceding object will be available Movement state correlated evaluated. In particular, (present) information about the (relative) speed and / or the (relative) acceleration of the preceding road user is taken into account.

The distance range is basically definable by a maximum distance limit and minimum distance limit. Since under certain circumstances, the current traffic situation and / or operating situation of the vehicle or the needs of the driver could have an influence on the desired operating strategy of the driver (drive unit automatically turn on or no turning on the prime mover), can advantageously be provided, the distance range fixed or dependent predetermined vehicle and / or environmental parameters and / or driver parameters can be defined. It goes without saying that the defined distance range can connect directly to the preceding traffic object or begins at the earliest with a certain distance to the preceding traffic object.

If the Anschaltlogik constructed such that at least one automatically switched off when the motor vehicle driving machine only under certain conditions when releasing the brake pedal is automatically switched on or can be switched on again, the Anschaltlogik must be extended so that when not-automatic starting the Drive machine when releasing the brake pedal (especially while the vehicle is still in motion) at a later time or in the presence of certain operating conditions after releasing the brake pedal, the prime mover is automatically turned on. It has been found that advantageously the start-stop device can be set up to initiate automatic activation of the drive machine depending on the actuation of the accelerator pedal when - basically possible but not initiated automatic activation of the drive machine when the brake pedal is released in particular, then an automatic switching on of the drive machine is caused when a predetermined accelerator pedal actuation threshold is exceeded when the accelerator pedal is actuated.

Likewise, the start-stop device can advantageously be designed to cause an automatic activation of the drive machine as a function of a recognized or presumed defined driving maneuver during - basically possible but not initiated automatic activation of the drive machine when the brake pedal is released, in particular when the vehicle is moving. wherein, in particular, an automatic switching on of the drive machine is initiated when an overtaking request and / or lane change request is detected or suspected. This functionality can analogously be used to prevent an automatic shutdown process, if the shutdown and an expected Zustart follow each other in time so short, so that no efficient engine stop duration is achieved because the engine-out phase fuel savings do not overcompensate for engine startup energy. In this case, the shutdown of the engine may be delayed until the aforementioned reasons cease to exist, or a situation is recognized that makes a onward journey unlikely.

• - plötzlich anfahrendes oder beschleunigendes relevantes Vorderfahrzeug,
• - sich ändernde Ampelphase (erkennbar z. B. über eine Kamera oder anhand vorliegender Backend-Informationen,
• - Passieren eines Verkehrszeichens (z. B. Vorfahrt achten) oder einer Haltelinie,
• - Wechsel in ein neues Kartensegment mit zu erwartender höherer Dynamik bzw. geringerer Stillstandswahrscheinlichkeit (z. B. Einfahren in einen Kreisverkehr),
• - vorausliegende Abbiegung aus Zielführung,
• - Erreichen eines Stauendes (erkennbar z. B. über sog. Real Time Traffic Information (kurz RTTI)) oder
• - Eine Kombination aus den genannten Fahrmanövern.

For detecting the defined driving maneuvers, various sensor signals, such. B. a flashing signal and / or a signal on the steering angle and / or environment detection signals and / or information of a navigation device are evaluated. In addition to the defined driving maneuvers already mentioned, the following recognized driving maneuvers can also cause the drive machine to be automatically switched on when the brake pedal has already been released:

• - suddenly approaching or accelerating relevant front vehicle,
• changing traffic light phase (recognizable, for example, via a camera or based on existing backend information,
• Passing a traffic sign (eg right of way) or a stop line,
• - change to a new map segment with expected higher dynamics or lower standstill probability (eg entering a roundabout),
• - ahead turn from route guidance,
• - Reaching a tail end (recognizable eg via so-called Real Time Traffic Information (short RTTI)) or
• - A combination of the mentioned driving maneuvers.

• 1 einen erfindungsgemäßen Aufbau einer Start-Stopp-Einrichtung zum Veranlassen eines automatischen Anschaltvorgangs einer automatisch abgeschalteten Antriebsmaschine, und
• 2 ein Diagramm zur Darstellung erfinderischer Aspekte.

In the drawing, an advantageous embodiment of the invention is now shown. It shows

• 1 a construction according to the invention of a start-stop device for initiating an automatic startup operation of an automatically switched-off prime mover, and
• 2 a diagram illustrating inventive aspects.

In detail shows the 1 a start-stop device SSE, which is set up, by sending a signal msa_start to initiate a connection operation of an automatically switched off when the motor vehicle engine BKM of the motor vehicle. The internal combustion engine of the motor vehicle, which is not shown here, can either be the only drive machine of the motor vehicle or one of at least two drive machines, as is the case, for example, in hybrid vehicles.

• - ein Geschwindigkeitssignal v des Fahrzeugs,
• - ein Signal sBP, das ein Information über die Betätigung der Bremse liefert,
• - ein Signal sGP, das eine Information über die Betätigung des Gaspedals liefert,
• - relevante Signale sCAM einer nach vorne gerichteten Kamera des Kraftfahrzeugs,
• - relevante Informationen sUltraschall von Ultraschall-Parksensoren,
• - relevante Informationen sLaserscanner eines verbauten Laserscanners,
• - relevante Signale sRadar eines am Fahrzeug angebrachten Radarsystems,
• - relevante Informationen sBackend eines fahrzeugexternen Backendsystems und
• - relevante Signale sNavi eines Navigationssystems inkl. sog. Real Time Traffic Information.

Among other things, the start-stop device SSE receives the following signals in order to be able to decide on the time when the automatic starting of the drive machine, which was previously switched off automatically, is started:

• a speed signal v of the vehicle,
• a signal sBP which provides information about the actuation of the brake,
• a signal sGP which provides information about the operation of the gas pedal,
• relevant signals sCAM of a front-facing camera of the motor vehicle,
• - relevant information ultrasound of ultrasonic parking sensors,
• - relevant information s laser scanner of a built-in laser scanner,
• relevant signals sRadar of a vehicle-mounted radar system,
• - relevant information sBackend of an off-vehicle backend system and
• - Relevant signals sNavi of a navigation system including so-called Real Time Traffic Information.

Furthermore, the start-stop device SSE receives information about the kinetic energy kE of the vehicle or information from which the kinetic energy kE of the vehicle can be determined, and information about the inclination nei of the vehicle or information nei, from which the determine the current inclination and the presumed future inclination of the vehicle. When determining the assumed inclination nei, the signals sNavi of the navigation system can be taken into account.

In particular, the sensor system that can provide information about preceding traffic objects serves to detect relevant preceding traffic objects (eg, "preceding road users") and to determine relevant information of the preceding road users, who can provide information for determining a suspected standstill position of the road user ahead.

For the further explanation of the configuration of the start-stop device SSE with regard to causing an automatic startup of the prime mover BKM is assumed that the internal combustion engine BKM was previously turned off during the running operation of the motor vehicle due to a corresponding operation of the brake pedal, since none Shutdown preventing operating situations (eg too low charge state of a battery present in the vehicle and / or too high a speed) templates.

While the internal combustion engine BKM is in the automatically-initiated OFF state, the start-stop device SSE first continuously monitors the brake signal sBP as to whether the brake is released. If it is detected on the basis of the brake signal sBP that the brake is released, an automatic starting of the internal combustion engine BKM is fundamentally permitted (emission of a signal "1") or caused by an on-hook logic AnL implemented in the start-stop device if no line-stop inhibitors are present , In addition to the known power-up inhibitors (eg no drivers detectable on the driver's seat), an existing power-on prevention logic AVL is further configured to prevent an automatic start of the internal combustion engine BKM, which can be initiated by the power-on logic AnL, if a preceding traffic object that is stopping its own motor vehicle (presumably) requires, is detected, and if it is determined that the motor vehicle presumably comes in a defined distance range behind the vorbefindlichen traffic object comes to a standstill with still switched off prime mover BKM.

For this purpose, the Anschaltverhinderungslogik AVL evaluates the presumed (relative) standstill position of the own motor vehicle p0EGO, which is determined taking into account the kinetic energy kE of the vehicle with the engine BKM still switched off and the information about the inclination nei of the vehicle to standstill achievement, the assumed (relative) position of the relevant preceding traffic object p0vFZG, which is determinable taking into account the ascertainable (relative) speed and / or the (relative) acceleration of the preceding traffic object.

If it is determined that the own vehicle would come to a standstill within a definable distance range behind the preceding traffic object, the power-on inhibit logic AVL sends out a signal "0". If this is not the case, the power-on prevention logic AVL sends out a signal "1". In an inverter unit downstream of the power-on prevention logic! the signal "0" or "1" emitted by the power-on prevention logic is inverted, so that when the signal "0" is transmitted, a "1" is forwarded, and when the signal "1" is transmitted, a "0".

Subsequently, the inverted signal 1 or 0 of the turn-on inhibit logic AVL and the output signal of the turn-on logic AnL are supplied to an AND gate &. Only when both signals are at "1" does the start-stop device SSE send a signal msa_start for initiating an automatic starting operation of the prime mover.

• - Kinetische Energie kE des eigenen Fahrzeugs,
• - Geschwindigkeit v des eigenen Fahrzeugs,
• - Motordrehzahl n_mot des eigenen Fahrzeugs,
• - Turbinendrehzahl n_mot des eigenen Fahrzeugs, und
• - das durch Betätigung des Bremspedals aufgebrachte Bremsmoment MBr.

The 2 shows a spanned over the time T diagram with the following waveforms:

• Kinetic energy kE of the own vehicle,
• Speed v of own vehicle,
• The engine speed n_mot of the own vehicle,
• Turbine speed n_mot of the own vehicle, and
• - The applied by actuation of the brake pedal braking torque MBr.

At the time T0 is the own vehicle EGO in the engine-off state, ie the prime mover was previously switched off automatically due to a corresponding brake pedal operation (in the low speed range). The course of kinetic energy indicates how the kinetic energy kE slowly decays to zero when the prime mover is not started. Similarly to the kinetic energy kE, the speed v of the vehicle EGO also decreases. In front of the own vehicle EGO is another road user vFZG.

At the time T1 the brake pedal is released so far that applied by the brake torque MBr no longer exceeds a predetermined braking torque threshold MBr_S_an, ie due to the release of the brake pedal, the prime mover of the motor vehicle EGO would be restarted when no Anschaltverhinderer is present.

For the purposes of the invention z. B. then prevented by the Anschaltlogik automatic startup of the drive machine, if it is determined that the motor vehicle EGO presumably in a defined distance range AF (eg., 0 - 4m or 0.5 - 4m) with the drive motor still switched off behind the vorbefindlichen traffic object vFZG comes to a standstill. This will be done at the time T1 based on the kinetic energy kE at the time T1 and possibly taking into account the current and probable future inclination of the vehicle EGO determines the standstill position p0EGO of the vehicle EGO to be reached while the prime mover is still switched off, which at the time T2 is reached. At the same time, the (probable) standstill position p0vFZG of the preceding road user vFZG at this time becomes T2 determined. From these two standstill positions p0EGO and p0vFZG and the predetermined defined distance range AF, it is determined whether the presumed Standstill position of the vehicle p0EGO within the defined distance range AF behind the preceding road user vFZG is. If this is the case - as in this example - an automatic activation of the drive machine is not permitted despite the exceeding of the predetermined braking torque threshold MBr_S_an when releasing the brake pedal, but prevents it.

By inventively designed here start-stop device can be easily detected a situation in which there is no desire to automatically turn on the prime mover, and be decided in accordance with this finding, whether an automatic turn on the engine are initiated when releasing the brake should or not. If, for example, a situation is detected in which there is no desire to continue or no continuation of travel, then a brief unintentional switching on of the engine is to be prevented.

The above-mentioned switch-on logic can, for. B. also be used in plug-in hybrid vehicles to decide whether in the present situation rather a Schubrekuperation (eg for battery charging) or a sailing operation to increase the rolling range and roll speed should be used.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10023331 A1 [0002]
• DE 102008061790 A1 [0004]
• DE 102012217899 A1 [0005]
• DE 102010034554 A1 [0006]
• DE 102016207280 A1 [0007]

Claims (10)

Start-stop device for initiating an automatic startup operation of an automatically disconnected prime mover of a motor vehicle, in particular a motor vehicle with automatic transmission, with an Anschaltlogik by the automatic turning on the automatically switched off when the motor vehicle driving machine while the vehicle is still moved veran is triggered when a release of the Brake pedal is detected, characterized in that the start-stop device (SSE) Anschaltverhinderungslogik (AVL), which prevents an engageable by the Anschaltlogik (AnL) automatic turn on the drive machine (BKM) when releasing the brake pedal, if a forward traffic object (vFZG), which presumably requires a stop of the motor vehicle (EGO) is detected, and if it is determined that the motor vehicle (EGO) presumably in a defined distance range (AF) with de-energized engine (BKM) behind de m preceding traffic object (vFZG) comes to a standstill. Start-stop facility after Claim 1 Characterized in that the vorausbefindliche transport object (VFZG) is a vorausbefindlicher road users and / or traffic signs and / or a traffic signal. Start-stop device according to one of the preceding claims, characterized in that, to determine whether the motor vehicle (EGO), with the drive unit (BKM) still switched off, presumably comes to a standstill within a defined distance range (AF) behind the preceding road user (vFZG), ascertained information which at least correlates with a presumed standstill position (p0EGO) of the motor vehicle (EGO) and a presumed position (p0vFZG) of the preceding road user (vFZG) at the time (T2) of reaching the standstill position (p0EGO) of the motor vehicle (EGO) become. Start-stop device according to one of the preceding claims, characterized in that for determining whether the motor vehicle (EGO) with the drive unit (BKM) still switched off presumably comes to a standstill in a defined distance range (AF) behind the preceding road user (vFZG) and / or for determining the information which at least correlates with the presumed standstill position (p0EGO) of the motor vehicle (EGO), information about the kinetic energy (kE) of the motor vehicle (EGO), in particular information about the kinetic energy (kE) of the motor vehicle (EGO ) at the time when automatic starting of the prime mover (BKM) is to be caused by the on-hook logic (AnL) or information about the kinetic energy (kE) of the motor vehicle (EGO) at the time (T1) of releasing the brake pedal become. Start-stop device according to one of the preceding claims, characterized in that for determining whether the motor vehicle (EGO) with the drive unit (BKM) still switched off presumably comes to a standstill in a defined distance range (AF) behind the preceding road user (vFZG) and / or for determining the information that at least correlates with the assumed standstill position (p0EGO) of the motor vehicle (EGO), information about the inclination nei of the motor vehicle (EGO), in particular information about the current or assumed future inclination (nei) of the motor vehicle (EGO ). Start-stop device according to one of the preceding claims, characterized in that for determining whether the motor vehicle (EGO) with the drive unit (BKM) still switched off presumably comes to a standstill in a defined distance range (AF) behind the preceding road user (vFZG) and / or for the determination of the information which at least correlates with the presumed position (pOvFZG) of the preceding road user (pOvFZG) at the time (T2) of reaching the standstill position (p0EGO) of the motor vehicle (EGO), information about the speed and / or the acceleration of the preceding road user (vFZG). Start-stop device according to one of the preceding claims, characterized in that the distance range (AF) is fixed or definable in dependence on predetermined vehicle and / or environmental parameters. Start-stop device according to one of the preceding claims, characterized in that the start-stop device (SSE) is set up is, if possible, but not prompted automatic turn on the drive machine (BKM) when releasing the brake pedal an automatic start depending on the operation of the accelerator pedal (sGP), in particular on the type of operation of the accelerator pedal, in which case an automatic turn on the Actuator (BKM) is initiated when a predetermined accelerator pedal actuation threshold is exceeded when the accelerator pedal is actuated. Start-stop device according to one of the preceding claims, characterized in that the start-stop device (SSE) is set, with possible, but not prompted automatic starting of the drive machine (BKM) when releasing the brake pedal, an automatic turn-on depending on a detected or suspected defined driving maneuvers to cause, in particular, then an automatic turning on the prime mover (BKM) is caused when a passing desire and / or lane change request is detected. Method for initiating an automatic startup procedure of an automatically disconnected prime mover of a motor vehicle, in particular a motor vehicle with automatic transmission, wherein an automatic turning on the drive motor automatically switched off while driving the vehicle is still caused moving vehicle when a release of the brake pedal is detected, characterized in that a automatic turning on (msa_start) the prime mover (BKM) when releasing the brake pedal of the motor vehicle (EGO) automatically switched off prime mover (BKM) is prevented in further moving motor vehicle (EGO), if a vorbefindliches traffic object (vFZG), stopping the motor vehicle (EGO) presumably required, is detected, and if it is determined that the motor vehicle (EGO) presumably in a defined distance range (AF) behind the preceding Verk honor object (vFZG) comes to a standstill.

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