DE102008035098A1 - Method for operating motor vehicle, involves determining characteristic that describes momentary driving conditions by sensor device, and assigning determined characteristic to working position or to neutral position - Google Patents
Method for operating motor vehicle, involves determining characteristic that describes momentary driving conditions by sensor device, and assigning determined characteristic to working position or to neutral position Download PDFInfo
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- DE102008035098A1 DE102008035098A1 DE200810035098 DE102008035098A DE102008035098A1 DE 102008035098 A1 DE102008035098 A1 DE 102008035098A1 DE 200810035098 DE200810035098 DE 200810035098 DE 102008035098 A DE102008035098 A DE 102008035098A DE 102008035098 A1 DE102008035098 A1 DE 102008035098A1
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- motor vehicle
- air
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- determined
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/16—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger operated by remote control, i.e. initiating means not mounted on vehicle
- B60T7/18—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger operated by remote control, i.e. initiating means not mounted on vehicle operated by wayside apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/12—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting otherwise than by retarding wheels, e.g. jet action
- B60T1/16—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting otherwise than by retarding wheels, e.g. jet action by increasing air resistance, e.g. flaps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/22—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle, or by means of contactless obstacle detectors mounted on the vehicle
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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
- 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, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
- B60W30/09—Taking automatic action to avoid collision, e.g. braking and steering
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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
- 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, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
- B60W30/095—Predicting travel path or likelihood of collision
Abstract
Description
Gebiet der ErfindungField of the invention
Die vorliegende Erfindung liegt auf dem Gebiet der Fahrzeugtechnik und betrifft ein Verfahren zum Betreiben eines Kraftfahrzeugs, sowie ein zur Durchführung des Verfahrens geeignetes Kraftfahrzeug.The The present invention is in the field of vehicle technology and relates to a method for operating a motor vehicle, as well one to carry the method suitable motor vehicle.
Stand der TechnikState of the art
Moderne Kraftfahrzeuge sind in der Regel mit automatischen Fahrerassistenzsystemen ausgerüstet, welche einer Erhöhung der Verkehrssicherheit dienen. Beispielsweise wirkt ein als ”Antiblockiersystem (ABS)” bezeichnetes Fahrerassistenzsystem bei Vollbremsungen einem Blockieren der Räder durch eine automatische Regelung des Bremsdrucks entgegen. Wesentliches Ziel hierbei ist das Aufrechterhalten der Steuerfähigkeit des Fahrzeugs während des Bremsvorgangs. Erreicht wird dies durch eine Erfassung von momentanen Drehzahlen der Räder mittels Drehzahlsensoren und einer gezielten Steuerung der den Radzylindern zugeführten Bremsflüssigkeit.modern Motor vehicles are usually equipped with automatic driver assistance systems equipped, which an increase to serve traffic safety. For example, acts as an "anti-lock braking system (ABS) " Driver assistance system at full braking a blocking of the wheels by a automatic regulation of the brake pressure. Essential goal In this case, maintaining the control capability of the vehicle during the Braking. This is achieved by capturing current ones Speeds of the wheels by means of speed sensors and a targeted control of the wheel cylinders supplied Brake fluid.
Wesentlich komplexer ist ein als ”elektronische Stabilitätskontrolle (ESC)” bezeichnetes Fahrerassistenzsystem, bei der durch gezieltes Bremsen von Rädern und einer Drosselung der Motorleistung einem Über- und Untersteuern bzw. Schleudern des Fahrzeugs entgegengewirkt werden soll. Erreicht wird dies durch die sensorgestützte Ermittlung einer Reihe intrinsischer (das Fahrzeug selbst betreffender) Kenngrößen zur Beschreibung des momentanen Fahrzeugzustands, wie Räderdrehzahl, Gierrate und Beschleunigung, und einem Vergleich der ermittelten Kenngrößen mit Sollwerten entsprechend einem auf einem Fahrerwunsch basierenden Sollzustand für das Fahrzeug, welcher beispielsweise über den momentanen Lenkeinschlag ermittelt wird.Essential more complex is one than "electronic stability control (ESC) " Driver assistance system, in which by targeted braking of wheels and throttling the engine power oversteer and understeer or Slingshot of the vehicle to be counteracted. Is achieved this through the sensor-assisted Determination of a series of intrinsic (the vehicle itself) Characteristics for Description of the current vehicle condition, such as wheel speed, Yaw rate and acceleration, and a comparison of the determined Characteristics with Setpoints according to a driver based request Target state for the vehicle, which for example on the current steering angle is determined.
Obgleich durch die bislang eingesetzten automatischen Fahrerassistenzsysteme eine Erhöhung der Verkehrssicherheit erreicht werden kann, führt deren Anwendung nicht zwangsläufig zu einer Verkürzung des Bremswegs, da vorrangiges Ziel ein Aufrechterhalten der Beherrschbarkeit des Fahrzeugs ist. Wie den einschlägigen Fachleuten bekannt ist, kann beispielsweise durch eine ABS-Regelung in manchen Situationen sogar eine Verlängerung des Bremswegs verursacht werden.Although through the automatic driver assistance systems used so far an increase in the Traffic safety can be achieved, their application does not necessarily a shortening of the braking distance, since the primary aim is to maintain controllability of the vehicle. As is known to those skilled in the art, can for example, by an ABS regulation in some situations even an extension of the braking path are caused.
Der Bremsweg eines Kraftfahrzeugs hängt in wesentlicher Weise von der Haft- bzw. Gleitreibung zwischen Rädern und Fahrbahn ab, die sich aus dem Anpressdruck der Räder auf die Fahrbahn (Normalkraft) und den spezifischen Materialeigenschaften, beschrieben durch eine Haft- bzw. Gleitreibungszahl (Reibungskoeffizient), ergibt. So beträgt beispielsweise die Haftreibungszahl für Gummireifen von Personenkraftfahrzeugen auf trockenem Asphalt typischer Weise 0,8–0,9, die Gleitreibungszahl ca. 0,4–0,5. Bei nassem Asphalt sind Reibungszahlen deutlich vermindert.Of the Braking distance of a motor vehicle hangs in a significant way from the static friction between wheels and Road surface resulting from the contact pressure of the wheels on the road surface (normal force) and the specific material properties described by Coefficient of adhesion or coefficient of friction (friction coefficient). This is for example the static friction coefficient for Rubber tires of passenger cars on dry asphalt more typical Way 0.8-0.9, the coefficient of sliding friction approx. 0.4-0.5. In wet asphalt friction coefficients are significantly reduced.
Bei einer Kurvenfahrt bzw. hängender Fahrbahn gilt, dass die Räder Seitenführungskräfte aufnehmen müssen. Wird das Fahrzeug beispielsweise während einer Kurvenfahrt abgebremst oder beschleunigt, so sind die in diesem Fall erreichbaren Verzögerungen und Beschleunigungen abhängig von den an den Rädern auftretenden Seitenführungskräften vermindert. Dieser Zusammenhang kann zumindest qualitativ durch den so genannten Kamm'schen Reibkreis beschrieben werden, einer graphischen Darstellung der maximalen Beschleunigungen bzw. Verzögerungen, die für eine bestimmte Gesamtkraft am Rad bei verschiedenen Seitenführungskräften möglich sind. Gemäß dem Kamm'schen Reibkreis nehmen bei zu nehmenden Seitenführungskräften die maximalen Beschleunigungen oder Verzögerungen ab und umgekehrt. Wird die mögliche Gesamtkraft überschritten, beispielsweise durch zu starkes Bremsen, geht das Rad vom Zustand der Haftreibung in den Zustand der Gleitreibung über.at a cornering or hanging Roadway is true that the wheels Take up side managers have to. If, for example, the vehicle is braked while cornering or accelerated, are the delays that can be achieved in this case and accelerations dependent from the at the wheels occurring cornering forces reduced. This relationship can at least qualitatively be explained by the so-called Kamm friction circle described, a graphical representation of the maximum Accelerations or delays, the for a certain total force on the wheel at different cornering forces are possible. Take according to Kamm's circle of friction at taking cornering forces the maximum Accelerations or decelerations and vice versa. Will the possible Total force exceeded, for example, due to excessive braking, the bike goes from the state Stiction in a condition of sliding friction over.
Soll ein Fahrzeug demgegenüber stärker abgebremst oder beschleunigt werden, kann dies erreicht werden, indem die Haftreibungszahl durch die Reibeigenschaften der Materialpaarung Gummi/Asphalt vergrößert wird, was im Unterschied zum Motorsport, wo durch spezielle Gummimischungen Haftreibungszahlen bis zu 2 erreicht werden, für Fahrzeuge des Straßenverkehrs nur eingeschränkt möglich ist. Hier ist es zumindest für sportliche Straßenfahrzeuge üblich, den Anpressdruck der Räder auf die Fahrbahn durch Front- oder Heckspoiler zu erhöhen. Zwar kann der Bremsweg durch diese Maßnahme verkleinert werden, jedoch wird der Kraftstoffverbrauch merklich erhöht, was in ökologischer Hinsicht nachteilig und vor dem Hintergrund stetig steigender Kraftstoffpreise zu vermeiden ist.Should a vehicle in contrast stronger slowed down or accelerated, this can be achieved by the coefficient of static friction by the frictional properties of the material pairing Rubber / asphalt is enlarged, what in contrast to motorsport, where by special rubber compounds Static friction numbers can be achieved up to 2, for vehicles of road traffic only limited is possible. Here it is at least for sporty road vehicles usual, the Contact pressure of the wheels to increase the roadway by front or rear spoiler. Though can the braking distance be reduced by this measure, However, the fuel consumption is significantly increased, which is environmentally disadvantageous and to avoid constantly rising fuel prices against the background is.
Aufgabenstellungtask
Demgegenüber besteht die Aufgabe der vorliegenden Erfindung darin, ein Verfahren zum Betreiben eines Kraftfahrzeugs anzugeben, das unter Vermeidung der genannten Nachteile eine Verkürzung des Bremswegs ermöglicht.In contrast there is the object of the present invention is to provide a method for To operate a motor vehicle to specify, while avoiding the mentioned disadvantages a shortening of Braking path allows.
Lösung der AufgabeSolution of the task
Diese und weitere Aufgaben werden nach dem Vorschlag der Erfindung durch ein Verfahren zum Betreiben eines Kraftfahrzeugs, sowie durch ein zur Durchführung des Verfahrens geeignetes Kraftfahrzeug mit den Merkmalen der unabhängigen Patentansprüche gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind durch die Merkmale der Unteransprüche angegeben.These and other objects are achieved according to the proposal of the invention by a method for operating a motor vehicle, and by a vehicle suitable for carrying out the method with the features of the independent claims. Advantageous embodiments The invention are characterized by the features of the subclaims.
Erfindungsgemäß ist ein Verfahren zum Betreiben eines Kraftfahrzeugs gezeigt, welches mit wenigstens einer luftlenkenden Struktur versehen ist, die durch eine Bewegungseinrichtung wahlweise (reversibel) in zumindest eine Arbeitsstellung und in eine Ruhestellung bringbar ist. In Arbeitsstellung bewirkt die luftlenkende Struktur bei fahrendem Kraftfahrzeug eine Luftlenkung in der Weise, dass eine Erhöhung des Anpressdrucks eines oder mehrerer Räder des Kraftfahrzeugs auf die Fahrbahn erzielt wird. In Ruhestellung wird durch die luftlenkende Struktur beim fahrenden Fahrzeug hingegen keine Erhöhung des Anpressdrucks der Räder auf die Fahrbahn bewirkt.According to the invention is a A method for operating a motor vehicle shown, which with at least a air-directing structure is provided by a moving means optionally (reversible) in at least one working position and in one Rest position can be brought. In working position causes the air-directing Structure with moving motor vehicle, an air steering in the way that an increase the contact pressure of one or more wheels of the motor vehicle the roadway is achieved. At rest is through the air-directing Structure in the moving vehicle, however, no increase in Contact pressure of the wheels effected on the roadway.
In dem erfindungsgemäßen Verfahren wird wenigstens ein eine momentane Fahrsituation des Kraftfahrzeugs beschreibendes Merkmal mittels wenigstens einer hier als Sensoreinrichtung bezeichneten Merkmalserfassungseinrichtung ermittelt. Eine Ermittlung des Merkmals erfolgt beispielsweise periodisch jeweils nach Ablauf einer wählbaren Zeitspanne. Hierbei kann es insbesondere von Vorteil sein, wenn Zeitspannen, nach deren Ablauf Merkmale periodisch ermittelt werden, für jedes Merkmal spezifisch gewählt werden, so dass verschiedene Merkmale jeweils nach Ablauf verschiedener Zeitspannen ermittelt werden. Dem ermittelten Merkmal wird durch die Steuereinrichtung entweder die Arbeitsstellung oder die Ruhestellung der luftleitenden Struktur zugeordnet. Basierend auf dem Ergebnis dieser Zuordnung wird die luftlenkende Struktur daraufhin durch eine mit der Steuereinrichtung datentechnisch verbundene, von der Steuereinrichtung gesteuerte Bewegungseinrichtung selbsttätig in ihre Arbeits- oder in ihre Ruhestellung überführt, falls sie sich nicht in der einzunehmenden Stellung befindet. So wird die luftlenkende Struktur in ihre Arbeitsstellung überführt, falls sie sich in ihrer Ruhestellung befindet und dem ermittelten Merkmal die Arbeitsstellung zugeordnet ist. Falls sich die luftleitende Struktur in ihrer Arbeitsstellung befindet und das ermittelte Merkmal der Arbeitsstellung zugeordnet ist, verbleibt die luftleitende Struktur in ihrer Arbeitsstellung. Falls sich die luftleitende Struktur in ihrer Ruhestellung befindet und das ermittelte Merkmal der Ruhestellung zugeordnet ist, verbleibt die luftleitende Struktur in Ruhestellung. Für den Fall, dass sich die luftleitende Struktur in Arbeitsstellung befindet und das ermittelte Merkmal der Ruhestellung zugeordnet ist, wird die luftleitende Struktur in ihre Ruhestellung überführt.In the method according to the invention becomes at least one a momentary driving situation of the motor vehicle descriptive feature by means of at least one here as a sensor device designated feature detection device determined. A determination of the feature takes place, for example, periodically after expiration a selectable one Period of time. This may be particularly advantageous if Periods of time, after the expiry of which characteristics are determined periodically, for each Feature specifically chosen so that different features each after expiration of different Periods are determined. The identified feature is the control device either the working position or the rest position assigned to the air-conducting structure. Based on the result This assignment is then the air-guiding structure by a data-related to the control device, of the Control device controlled movement device automatically in their Transferred to work or to their resting position if they are not in the position to be taken. This is how the air-guiding structure becomes transferred to their working position, if she is in her rest position and the identified feature the working position is assigned. If the air-conducting Structure is in its working position and the identified feature assigned to the working position, the air-conducting structure remains in their working position. If the air-guiding structure in their resting position and the determined characteristic of the resting position is assigned, the air-conducting structure remains at rest. For the Case that the air-conducting structure is in working position and the determined feature is assigned to the rest position is transferred the air-conducting structure to its rest position.
Mithilfe des erfindungsgemäßen Verfahrens kann somit in vorteilhafter Weise auf Basis der Erfassung eines die momentane Fahrsituation des Kraftfahrzeugs beschreibenden Merkmals durch die wenigstens eine luftlenkende Struktur gezielt eine fahrsituationsbedingte Erhöhung des Anpressdrucks der Räder auf die Fahrbahn erreicht werden, um hierdurch insbesondere den Bremsweg des Kraftfahrzeugs zu verkürzen. Da die luftlenkende Struktur nur in bestimmten Fahrsituationen in ihre Arbeitsstellung gebracht werden kann und ansonsten in ihrer Ruhestellung ist, kann gegenüber der Verwendung herkömmlicher Spoiler Kraftstoff eingespart werden.aid of the method according to the invention can thus advantageously based on the detection of a momentary Driving situation of the motor vehicle descriptive feature by the at least one air-guiding structure targeted a driving situation-related increase the contact pressure of the wheels be reached on the roadway, thereby in particular the To shorten the braking distance of the motor vehicle. Because the air-directing structure brought into their working position only in certain driving situations can be and is otherwise in their rest position, can be compared to the Use of conventional Spoiler fuel can be saved.
Die Erfindung erstreckt sich weiterhin auf ein Kraftfahrzeug, das mit wenigstens einer luftlenkenden Struktur versehen ist, die durch eine Bewegungseinrichtung wahlweise in zumindest eine beim fahrenden Fahrzeug eine Luftlenkung zur Erhöhung des Anpressdrucks eines oder mehrerer Räder auf die Fahrbahn bewirkende Arbeitsstellung oder in eine beim fahrenden Fahrzeug keine Luftlenkung zur Erhöhung des Anpressdrucks der Räder auf die Fahrbahn bewirkende Ruhestellung bringbar ist. Es umfasst weiterhin wenigstens eine Sensoreinrichtung zum Ermitteln wenigstens eines eine momentane Fahrsituation des Kraftfahrzeugs beschreibenden Merkmals, sowie eine mit dem wenigstens einen Sensor und der Bewegungseinrichtung datentechnisch verbundene Steuereinrichtung, welche programmtechnisch so eingerichtet ist, dass sie ein wie oben beschriebenes Verfahren ausführen kann.The Invention further extends to a motor vehicle that with at least one air-guiding structure is provided by a movement device optionally in at least one while driving Vehicle an air steering to increase the contact pressure of a or more wheels on the roadway causing working position or in the driving Vehicle no air steering to increase the contact pressure of Wheels on the roadway causing rest position can be brought. It still includes at least one sensor device for determining at least one a momentary driving situation of the motor vehicle descriptive feature, and one with the at least one sensor and the moving means data-technically connected control device, which programmatically is set up to be a method as described above To run can.
Ausführungsbeispielembodiment
Die
Erfindung wird nun anhand eines Ausführungsbeispiels näher erläutert, wobei
Bezug auf die beigefügte
Es zeigt:It shows:
In
Der
Dachspoiler
Das
Kraftfahrzeug
Ein
mikroprozessorbasiertes Steuergerät
In
dem Sensormodul
Wird
durch den Abstandssensor des Sensormoduls
Im
Sensormodul
Im
Sensormodul
Eine
solche Objektklassifizierung ermöglicht in
vorteilhafter Weise eine Steuerung des Dachspoilers
Im
Sensormodul
Das
Kraftfahrzeug
Das
Kraftfahrzeug
Das
erfindungsgemäßen Verfahren
ermöglicht
in vorteilhafter Weise eine automatische Hin- und Herbewegung des
Dachspoilers
- 11
- Kraftfahrzeugmotor vehicle
- 22
- Dachspoilerroof spoiler
- 33
- Bewegungseinrichtungmover
- 44
- Fahrzeugdachvehicle roof
- 55
- Schwenkgelenkpivot
- 66
- Steuergerätcontrol unit
- 77
- Sensormodulsensor module
- 88th
- Objektobject
- 99
- Radwheel
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE200810035098 DE102008035098A1 (en) | 2008-07-28 | 2008-07-28 | Method for operating motor vehicle, involves determining characteristic that describes momentary driving conditions by sensor device, and assigning determined characteristic to working position or to neutral position |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE200810035098 DE102008035098A1 (en) | 2008-07-28 | 2008-07-28 | Method for operating motor vehicle, involves determining characteristic that describes momentary driving conditions by sensor device, and assigning determined characteristic to working position or to neutral position |
Publications (1)
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DE102008035098A1 true DE102008035098A1 (en) | 2010-02-04 |
Family
ID=41461407
Family Applications (1)
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DE200810035098 Withdrawn DE102008035098A1 (en) | 2008-07-28 | 2008-07-28 | Method for operating motor vehicle, involves determining characteristic that describes momentary driving conditions by sensor device, and assigning determined characteristic to working position or to neutral position |
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Cited By (6)
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CN102126486A (en) * | 2011-01-18 | 2011-07-20 | 王海鹏 | Motor vehicle auxiliary speed-reducing method and device |
GB2495983A (en) * | 2011-10-28 | 2013-05-01 | Gordon Murray Design Ltd | Emergency braking system for a wheeled land vehicle that changes the aerodynamic characteristics of the vehicle |
DE102013020201A1 (en) * | 2013-11-30 | 2015-06-03 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Motor vehicle with aerodynamic element |
FR3014403A1 (en) * | 2013-12-11 | 2015-06-12 | Peugeot Citroen Automobiles Sa | DEVICE FOR CONTROLLING AN AERODYNAMIC ACCESSORY, WHICH IS RETRACTABLE AND LOCATED UNDER THE BOX OF A MOTOR VEHICLE |
DE102016012349A1 (en) | 2016-10-14 | 2018-04-19 | Audi Ag | Method for operating a plurality of piloted motor vehicles traveling in a row in a row, and motor vehicle |
CN112373443A (en) * | 2020-11-26 | 2021-02-19 | 西南林业大学 | Brake equipment and brake method for automobile speed reducing parachute |
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