DE102008029453B4 - Method for setting a so-called "sailing mode" in a motor vehicle - Google Patents

Method for setting a so-called "sailing mode" in a motor vehicle Download PDF

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DE102008029453B4
DE102008029453B4 DE102008029453.5A DE102008029453A DE102008029453B4 DE 102008029453 B4 DE102008029453 B4 DE 102008029453B4 DE 102008029453 A DE102008029453 A DE 102008029453A DE 102008029453 B4 DE102008029453 B4 DE 102008029453B4
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motor vehicle
sailing mode
mode
switched
called
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DE102008029453A1 (en
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Hermann Kuenzner
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/082—Selecting or switching between different modes of propelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/25—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using haptic output
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18072—Coasting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • B60W50/16—Tactile feedback to the driver, e.g. vibration or force feedback to the driver on the steering wheel or the accelerator pedal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18072—Coasting
    • B60W2030/1809—Without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/10—Change speed gearings
    • B60W2510/106—Output power
    • B60W2510/1065—Transmission of zero torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/12—Brake pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/083—Torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Human Computer Interaction (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst, dadurch gekennzeichnet, dass bei Nullstellung des Fahrpedals in den „Segelmodus“ geschaltet wird, und dass vor einer Bremspedalstellung, bei welcher sich das Bremspedal in einer Nullstellung befindet, eine für den Fahrer haptisch spürbare Zwischenstellung vorgesehen ist, welche in den „Schubbetrieb“ zurückschaltet.Method for setting a so-called "sailing mode" in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the engine braking the motor vehicle, characterized in that when the accelerator pedal is in the zero position, Sailing mode "is switched, and that before a brake pedal position in which the brake pedal is in a neutral position, an intermediate position that the driver can feel is provided, which switches back to" overrun mode ".

Description

Die Erfindung betrifft ein Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst.The invention relates to a method for setting a so-called “sailing mode” in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the engine braking the motor vehicle.

Es ist eine bekannte Tatsache, dass Kraftfahrzeuge sehr wenig Treibstoff verbrauchen, wenn sie „segeln“, d. h. wenn sie ihre kinetische Energie nützen, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors sie bremst. Dieser Zustand lässt sich bei einem Automatikfahrzeug dadurch herstellen, dass am Wählhebel die Position „N“ eingelegt wird, bei einem Handschalter durch Treten der Kupplung oder durch Einlegen des „Leerganges“.It is a known fact that automobiles use very little fuel when they are "sailing"; H. when they use their kinetic energy to roll as far as possible without the drag torque of the motor slowing them down. In an automatic vehicle, this state can be established by engaging the "N" position on the selector lever, by pressing the clutch on a manual switch or by engaging the "neutral gear".

Das „Segeln“ wird bei Automatikfahrzeugen relativ selten genutzt, bei Handschaltern praktisch nie. Ursache ist die umständliche Bedienung zum Erreichen des „Segelmodus“.“Sailing” is used relatively seldom in automatic vehicles, and practically never in manual switches. The reason is the cumbersome operation to reach the "sailing mode".

Aus der DE 199 22 338 A1 ist ein Verfahren zum Einstellen eines Segelmodus bekannt, wobei vor einer Fahrpedalstellung für den Schubbetrieb eine für den Fahrer haptisch spürbare Zwischenstellung vorgesehen ist, welche in den Segelmodus schaltet. Weiteren Stand der Technik zum Segelmodus offenbaren die DE 10 2004 017 115 A1 , die DE 102 21 701 A1 und die nachveröffentlichten DE 10 2007 035 426 A1 und DE 10 2007 035 424 A1 .From the DE 199 22 338 A1 a method for setting a sailing mode is known, an intermediate position which the driver can feel haptically and which switches to the sailing mode being provided in front of an accelerator pedal position for overrun operation. Further prior art to the sailing mode disclose DE 10 2004 017 115 A1 , the DE 102 21 701 A1 and the post-published DE 10 2007 035 426 A1 and DE 10 2007 035 424 A1 .

Es ist daher Aufgabe der vorliegenden Erfindung, ein alternatives Verfahren anzugeben, welches auf einfache Weise die Einstellung des „Segelmodus“ ermöglicht.It is therefore the object of the present invention to provide an alternative method which enables the “sailing mode” to be set in a simple manner.

Diese Aufgabe wird bei einem Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst, dadurch gelöst, dass vor einer Fahrpedalstellung „Schubbetrieb“, bei welcher sich das Fahrpedal in einer Nullstellung befindet, eine für den Fahrer haptisch spürbare Zwischenstellung vorgesehen ist, welche in den „Segelmodus“ schaltet.In a method for setting a so-called “sailing mode” in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the motor braking the motor vehicle, this object is achieved in that in front of a Accelerator pedal position "overrun", in which the accelerator pedal is in a neutral position, an intermediate position that the driver can feel is provided, which switches to "sailing mode".

Infolge dieser Maßnahme kann der Fahrer leicht und einfach in den „Segelmodus“ umschalten, um dadurch kraftstoffsparend zu fahren.As a result of this measure, the driver can easily and simply switch to "sailing mode" in order to drive in a fuel-efficient manner.

Die Unteransprüche beinhalten vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung.The subclaims contain advantageous developments and refinements of the invention.

Nach einer bevorzugten Weiterbildung wird der Motor im „Segelmodus“ vom Antriebsstrang getrennt. Dies kann vorteilhafterweise durch eine automatische Betätigung der Kupplung oder durch ein automatisches Einlegen des Leerganges erfolgen.According to a preferred development, the engine is separated from the drive train in “sailing mode”. This can advantageously be done by automatically actuating the clutch or by automatically engaging the idle gear.

Um aus dem „Segelmodus“ wieder in den „Schubbetrieb“ zurückzuschalten wird nach einer vorteilhaften Ausgestaltung das Fahrpedal aus der Zwischenstellung in die Nullstellung zurückbewegt, wodurch der Motor wieder mit dem Antriebsstrang verbunden wird.In order to switch back from “sailing mode” to “coasting mode”, according to an advantageous embodiment, the accelerator pedal is moved back from the intermediate position to the zero position, which reconnects the engine to the drive train.

Die Aufgabe kann bei einem Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst, erfindungsgemäß auch dadurch gelöst werden, dass bei Nullstellung des Fahrpedals in den „Segelmodus“ geschaltet wird, und dass vor einer Bremspedalstellung, bei welcher sich das Bremspedal in einer Nullstellung befindet, eine für den Fahrer haptisch spürbare Zwischenstellung vorgesehen ist, welche in den „Schubbetrieb“ zurückschaltet.In a method for setting a so-called “sailing mode” in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the engine braking the motor vehicle, the object can also be achieved according to the invention by that when the accelerator pedal is in the zero position, it is switched to "sailing mode" and that before a brake pedal position in which the brake pedal is in a zero position, an intermediate position that the driver can feel is provided, which switches back to "overrun mode".

Die haptisch spürbare Zwischenstellung wird dabei vorteilhafterweise von einer Raststellung gebildet.The haptically perceptible intermediate position is advantageously formed by a latching position.

Die Aufgabe kann bei einem Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst, erfindungsgemäß weiterhin dadurch gelöst werden, dass beim Ausschalten eines Tempomaten in den „Segelmodus“ geschaltet wird, und dass beim Reduzieren der am Tempomaten eingestellten Soll-Geschwindigkeit in den „Schubbetrieb“ geschaltet wird bzw. ein Bremseingriff erfolgt.In a method for setting a so-called "sailing mode" in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the motor braking the motor vehicle, the object can furthermore be achieved according to the invention by: that when a cruise control is switched off, it is switched to "sailing mode", and that when the target speed set on the cruise control is reduced, it is switched to "overrun mode" or braking is applied.

Die Aufgabe kann bei einem Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst, weiterhin dadurch gelöst werden, dass der Zustand „Segelmodus“ über einen Tempomaten eingestellt werden kann.In a method for setting a so-called “sailing mode” in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the motor braking the motor vehicle, the object can also be achieved in that the "sailing mode" state can be set using a cruise control.

Dazu ist der Tempomat vorteilhafterweise mit einem zwei- oder mehrstufigen Hebel versehen, über den die Betriebszustände „Segelmodus“, „Schubbetrieb“ und „Bremseingriff“ eingestellt werden können.For this purpose, the cruise control is advantageously provided with a two-stage or multi-stage lever, via which the operating states “sailing mode”, “coasting mode” and “braking intervention” can be set.

Die Aufgabe kann bei einem Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst, weiterhin dadurch gelöst werden, dass eine Sensorik vorgesehen wird, welche erkennt, dass die momentane Leistungs- bzw. Geschwindigkeitsanforderung auch ohne Motor erfüllbar ist, und dann selbsttätig in den „Segelmodus“ schaltet.In a method for setting a so-called “sailing mode” in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the motor braking the motor vehicle, the object can also be achieved in that a sensor system is provided which recognizes that the current power or speed requirement can be met even without an engine, and then automatically switches to "sailing mode".

Dabei wirkt die Sensorik vorteilhafterweise mit einem Effizienzprogramm zusammen, welches vom Fahrer anwählbar ist, wenn er besonders effizient fahren möchte.The sensor system advantageously interacts with an efficiency program that can be selected by the driver if he wants to drive particularly efficiently.

Nach einer vorteilhaften Ausgestaltung kann bei jedem der vorstehend angegebenen Lösungsvorschläge der Motor des Kraftfahrzeugs im „Segelmodus“ vollständig abgestellt werden.According to an advantageous embodiment, the engine of the motor vehicle can be completely switched off in “sailing mode” in each of the proposed solutions given above.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung.Further details, features and advantages of the invention emerge from the following description.

Durch die Erfindung werden verschiedene Lösungsmöglichkeiten aufgezeigt, wie man einfach und bequem in den sog. „Segelmodus“ bei einem Kraftfahrzeug umschalten kann, um Kraftstoff zu sparen.The invention shows various possible solutions as to how one can easily and conveniently switch to the so-called “sailing mode” in a motor vehicle in order to save fuel.

Nach einer Lösung ist vor der Fahrpedalstellung „Schubbetrieb“, in welcher das Fahrpedal in Nullstellung ist, eine für den Nutzer haptisch spürbare Zwischenstellung vorgesehen, die in den „Segelmodus“ schaltet. Dazu wird durch eine geeignete technische Maßnahme der Motor vom Antriebsstrang getrennt (z. B. durch automatische Betätigen der Kupplung oder automatisches Einlegen des Leerganges). Wenn der Nutzer das Fahrpedal vollständig zurücknimmt, wird in den „Schubbetrieb“ zurückgeschaltet, d. h. der Motor wird wieder mit dem Antriebsstrang verbunden.According to one solution, in front of the accelerator pedal position "overrun mode", in which the accelerator pedal is in the zero position, an intermediate position that the user can feel is provided, which switches to "sailing mode". For this purpose, the engine is separated from the drive train by a suitable technical measure (e.g. by automatically operating the clutch or automatically engaging the idle gear). If the user takes the accelerator pedal back completely, the system switches back to “overrun mode”, ie. H. the engine is reconnected to the drive train.

Nach einer anderen Lösung führt das Fahrpedal in seiner Leerlaufstellung in den „Segelmodus“. Der „Schubbetrieb“ bzw. ein Bremseingriff wird durch eine erste Stufe im Bremspedal erreicht. Diese Stufe kann wiederum haptisch gekennzeichnet sein, indem der Nutzer ganz zu Anfang der Bremsbetätigung ein leichtes Einrasten spürt.According to another solution, the accelerator pedal in its idle position leads to "sailing mode". The "overrun mode" or a braking intervention is achieved by a first step on the brake pedal. This stage can in turn be marked haptically in that the user feels a slight click at the very beginning of the brake actuation.

Nach einer weiteren Lösung schaltet das Ausschalten der Tempomat-/ACC-Regelung in den „Segelmodus“ (abhängig von der Umsetzung für das Fahrpedal), und das Reduzieren der Soll-Geschwindigkeit führt in den „Schubbetrieb“ bzw. zum Bremseingriff.According to another solution, switching off the cruise control / ACC control switches to "sailing mode" (depending on the implementation for the accelerator pedal), and reducing the target speed leads to "overrun mode" or braking intervention.

Nach einer anderen Lösung kann der „Segelmodus“ über einen Tempomaten oder eine ACC-Regelung eingestellt werden. Hierbei ist vorzugsweise ein zwei- oder mehrstufig rastendes Bedienelement für die Tempomat-/ACC-Regelung vorgesehen. Z. B. könnte eine erste Raststufe in den „Segelmodus“ schalten, eine zweite Raststufe in den „Schubbetrieb“ und eine dritte Raststufe zu einem Bremseingriff führen.According to another solution, the "sailing mode" can be set using a cruise control or an ACC control. A two-stage or multi-stage latching control element for the cruise control / ACC control is preferably provided here. For example, a first detent level could switch to “sailing mode”, a second detent level to “overrun mode” and a third detent level to a braking intervention.

Nach einer weiteren Lösung kann das Kraftfahrzeug auch von sich aus in den „Segelmodus“ schalten, wenn es über eine geeignete Sensorik erkennt, dass die momentane Leistungs- bzw. Geschwindigkeitsanforderung auch ohne Motor erfüllbar ist (z. B. bei Strecken mit leichtem Gefälle).According to a further solution, the motor vehicle can also switch to "sailing mode" on its own if it detects via suitable sensors that the current power or speed requirement can also be met without an engine (e.g. on routes with a slight gradient) .

Der „Segelmodus“ kann auch Teil eines Effizienzprogrammes sein, das vom Fahrer aktiviert werden kann, wenn er Kraftstoff sparen möchte. Wenn ein Fahrer jedoch betont sportlich fahren und mit möglichst kurzer Verzögerung Lastanforderungen umgesetzt haben will, kann er das Effizienzprogramm deaktivieren. The "sailing mode" can also be part of an efficiency program that can be activated by the driver if he wants to save fuel. However, if a driver wants to drive in a sporty way and have load requirements implemented as quickly as possible, he can deactivate the efficiency program.

Bei allen Lösungsvarianten kann der Motor im „Segelmodus“ ganz abgestellt werden und dadurch ähnlich wie die heute bereits verfügbare Start-/Stopp-Automatik zusätzlich Kraftstoff sparen. Dazu ist allerdings Voraussetzung, dass es durch entsprechende technische Auslegung nicht notwendig ist, dass der Motor permanent läuft (indem z. B. Bremse und Lenkung elektrisch servounterstützt werden).With all solution variants, the engine can be switched off completely in "sailing mode" and thus save additional fuel, similar to the automatic start / stop system that is already available today. A prerequisite for this, however, is that the appropriate technical design does not require the motor to run permanently (e.g. by electrically servo-assisted by the brake and steering).

Ein Vorteil der Erfindung ist die geringe Geräuschentwicklung im „Segelmodus“ sowie das fast momentenfreie Verhalten der Räder.One advantage of the invention is the low level of noise in "sailing mode" and the almost torque-free behavior of the wheels.

Heute kann es bei Straßenverhältnissen mit niedrigem Reibwert notwendig sein, zur Stabilisierung des Kraftfahrzeugs die Kupplung zu treten oder bei einem Automatikgetriebe in die „N“-Stellung zu schalten. Viele Nutzer wissen aber nicht, dass dies eine Maßnahme zur Stabilisierung des Kraftfahrzeuges bei niedrigen Reibwerten ist. Durch die vorgeschlagene Erfindung kann der sichere Zustand durch einfaches und vor allem intuitives Zurücknehmen des Fahrpedals erreicht werden. Dadurch trägt die Erfindung auch zu einer Steigerung der Verkehrssicherheit bei.Today, in road conditions with a low coefficient of friction, it may be necessary to use the clutch to stabilize the motor vehicle or to shift into the "N" position in an automatic transmission. However, many users do not know that this is a measure to stabilize the motor vehicle with low coefficients of friction. With the proposed invention, the safe state can be achieved by simply and, above all, intuitively releasing the accelerator pedal. As a result, the invention also contributes to increasing traffic safety.

Die vorhergehende Beschreibung der vorliegenden Erfindung dient nur zu illustrativen Zwecken und nicht zum Zwecke der Beschränkung der Erfindung. Im Rahmen der Erfindung sind verschiedene Änderungen und Modifikationen möglich, ohne den Umfang der Erfindung sowie ihrer Äquivalente zu verlassen.The foregoing description of the present invention is for illustrative purposes only and not for the purpose of limiting the invention. Various changes and modifications are possible within the scope of the invention without departing from the scope of the invention and its equivalents.

Claims (4)

Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst, dadurch gekennzeichnet, dass bei Nullstellung des Fahrpedals in den „Segelmodus“ geschaltet wird, und dass vor einer Bremspedalstellung, bei welcher sich das Bremspedal in einer Nullstellung befindet, eine für den Fahrer haptisch spürbare Zwischenstellung vorgesehen ist, welche in den „Schubbetrieb“ zurückschaltet.Method for setting a so-called “sailing mode” in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the engine braking the motor vehicle, characterized in that when the accelerator pedal is in zero position is switched to "sailing mode", and that before a brake pedal position in which the brake pedal is in a zero position, an intermediate position that the driver can feel is provided, which switches back to "overrun mode". Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die haptisch spürbare Zwischenstellung von einer Raststellung gebildet wird.Procedure according to Claim 1 , characterized in that the haptically perceptible intermediate position is formed by a latching position. Verfahren zum Einstellen eines sog. „Segelmodus“ bei einem Kraftfahrzeug, bei dem die kinetische Energie des Kraftfahrzeugs genutzt wird, um möglichst weit zu rollen, ohne dass das Schleppmoment des Motors das Kraftfahrzeug bremst, dadurch gekennzeichnet, dass beim Ausschalten eines Tempomaten in den „Segelmodus“ geschaltet wird, und dass beim Reduzieren der am Tempomaten eingestellten Soll-Geschwindigkeit in den „Schubbetrieb“ geschaltet wird bzw. ein Bremseingriff erfolgt.Method for setting a so-called “sailing mode” in a motor vehicle, in which the kinetic energy of the motor vehicle is used to roll as far as possible without the drag torque of the engine braking the motor vehicle, characterized in that when a cruise control is switched off in the “ Sailing mode ”is switched, and that when the target speed set on the cruise control is reduced, it is switched to“ coasting mode ”or braking intervention takes place. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Motor des Kraftfahrzeugs im „Segelmodus“ vollständig abgestellt wird.Method according to one of the Claims 1 to 3 , characterized in that the engine of the motor vehicle is completely switched off in "sailing mode".
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