DE19749582A1 - Fuel economy controlled operation of a road vehicle - Google Patents

Fuel economy controlled operation of a road vehicle

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Publication number
DE19749582A1
DE19749582A1 DE19749582A DE19749582A DE19749582A1 DE 19749582 A1 DE19749582 A1 DE 19749582A1 DE 19749582 A DE19749582 A DE 19749582A DE 19749582 A DE19749582 A DE 19749582A DE 19749582 A1 DE19749582 A1 DE 19749582A1
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Germany
Prior art keywords
vehicle
detecting
actuators
vehicle environment
condition data
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DE19749582A
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German (de)
Inventor
Andreas Dr Bastian
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Volkswagen AG
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Volkswagen AG
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Priority to DE19749582A priority Critical patent/DE19749582A1/en
Publication of DE19749582A1 publication Critical patent/DE19749582A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
    • B60R16/0236—Circuits relating to the driving or the functioning of the vehicle for economical driving
    • 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
    • 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
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/84—Data processing systems or methods, management, administration

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Traffic Control Systems (AREA)

Abstract

The vehicle system has a central controller (5) that accepts inputs from a distance sensor (2), a camera (3) and other sensors (4) that indicate vehicle status and also its status in the environment. Outputs are generated to actuators (7-9) on the vehicle. The vehicle is controlled to provide a fuel economy optimized driving profile.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Kraftstoffeinsparung in Kraftfahrzeugen.The invention relates to a method and a device for saving fuel in Motor vehicles.

Aufgrund steigender Kraftstoffpreise und eines erhöhten Umweltbewußtsein der Kraftfahrzeughalter besteht der Wunsch nach einem möglichst kraftstoffsparenden Kraftfahrzeug. Neben fahrzeugspezifischen Parametern hat die Fahrweise einen erheblichen Einfluß auf den Kraftstoffverbrauch. Dazu bieten moderne Kraftfahrzeuge dem Kraftfahrzeugführer einen Spar-Gang an, mit dem dieser insbesondere bei gleichbleibender Fahrweise, wie beispielsweise einer Autobahnfahrt mit gleichbleibender Geschwindigkeit, einen geringeren Kraftstoffverbrauch erzielen kann. Nachteilig ist, daß zum einen der Kraftfahrzeugführer die jeweils geeigneten Gänge selbst situationsbedingt wählen muß und zum anderen seine Fahrweise entsprechend anpassen muß.Due to rising fuel prices and increased environmental awareness Motor vehicle owners want to save fuel as much as possible Motor vehicle. In addition to vehicle-specific parameters, the driving style has a significant one Influence on fuel consumption. In addition, modern motor vehicles offer that Motor vehicle drivers to an economy gear, with which this is particularly the same Driving style, such as driving on the motorway at a constant speed, can achieve lower fuel consumption. The disadvantage is that on the one hand Motor vehicle drivers must choose the appropriate gears themselves depending on the situation and on the other hand must adapt his driving style accordingly.

Das Problem der geeigneten Gangwahl wird durch Automatikgetriebe gelöst, bei denen zwischen einer sportlichen und einer ökonomischen Fahrweise gewählt werden kann. In der ökonomischen Fahrstufe wird möglichst früh ein höherer Gang gewählt, so daß der Motor mit geringeren Drehzahlen betrieben wird. Das Problem mit der Fahrweise bleibt dabei jedoch unberücksichtigt.The problem of suitable gear selection is solved by automatic transmissions, in which you can choose between a sporty and an economical driving style. In the economic gear, a higher gear is selected as early as possible so that the engine is operated at lower speeds. The problem with the driving style remains however disregarded.

Aus der DE 43 34 886 ist eine Zielführungseinrichtung für ein Kraftfahrzeug mit einem Bordrechner zur Gewinnung von Signalen für eine Fahrzeit- und/oder verbrauchsoptimale Fahrstrecke bekannt, bei dem verkehrssituationsbedingte Änderungen der optimalen Fahrstrecke berücksichtigt werden. Eine optimale Gangwahl und/oder Adaption der Fahrweise findet nicht statt.DE 43 34 886 describes a route guidance device for a motor vehicle with a On-board computer for the acquisition of signals for an optimal driving time and / or consumption Route known, in which traffic-related changes in the optimal Route are taken into account. Optimal gear selection and / or adaptation of the Driving style does not take place.

Der Erfindung liegt daher das technische Problem zugrunde, ein Verfahren und eine Vorrichtung zur Kraftstoffeinsparung in Kraftfahrzeugen zu schaffen, bei der die Fahrweise des Kraftfahrzeugführers verbrauchsoptimiert beeinflußt wird.The invention is therefore based on the technical problem, a method and a To create a device for saving fuel in motor vehicles, in which the driving style of the motor vehicle driver is influenced in a consumption-optimized manner.

Die Lösung des technischen Problems ergibt sich durch die Merkmale der Patentansprüche 1 und 9. Aus den Daten von Sensoren zur Erfassung von Fahrzeugzustandsdaten und den Mitteln zur Erfassung der Fahrzeugumgebung wird in einer Zentraleinheit ein verbrauchsoptimiertes Fahrprofil erstellt und ein Satz von Steuersignalen für Aktuatoren des Kraftfahrzeuges erzeugt, um das Fahrprofil umzusetzen. Bei aktivierter Vorrichtung verhält sich daher das Kraftfahrzeug wie ein uasi-Autonomes-Kraftfahrzeug, so wie es beispielsweise bei einem Tempomat oder einer automatischen Distanzregelung (ADR- Systeme) der Fall ist. Quasi deshalb, weil der Kraftfahrzeugführer jederzeit aktiv das berechnete Fahrprofil wieder verlassen kann, beispielsweise um einen Überholvorgang einzuleiten. Das Prinzip beruht darauf, daß durch die Mittel zur Erfassung des Fahrzeugumgebung feststellbar ist, wieviele Fahrzeuge mit welcher Geschwindigkeit sich wo befinden. Daraus ist ableitbar, mit welcher konstanten Geschwindigkeit sich beispielsweise das Kraftfahrzeug möglichst lange fortbewegen kann, ohne Sicherheitsabstände zu verletzen. Zu dieser Geschwindigkeit läßt sich dann beispielsweise aus einem Kennfeld ein verbrauchsoptimiertes Gang/Drehzahl-Paar ermitteln. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.The solution to the technical problem results from the features of the claims 1 and 9. From the data from sensors for recording vehicle condition data and the Means for detecting the vehicle environment is in a central unit consumption-optimized driving profile and a set of control signals for actuators of the Motor vehicle generated to implement the driving profile. Behavior when device is activated therefore the motor vehicle looks like a uasi-autonomous motor vehicle, just like it for example with cruise control or automatic distance control (ADR- Systems) is the case. Quasi because the driver of the vehicle is active at all times calculated driving profile can leave again, for example, to overtake initiate. The principle is based on the fact that the means for recording the It is possible to determine how many vehicles are traveling at what speed and where are located. From this it can be deduced at what constant speed, for example the motor vehicle can travel as long as possible without safety distances hurt. A map can then be used for this speed, for example Determine consumption-optimized gear / speed pair. Further advantageous configurations the invention emerge from the subclaims.

In einer bevorzugten Ausführungsform sind die Mittel zur Erfassung der Fahrzeugumgebung als Abstandssensoren ausgebildet. Da diese in modernen Kraftfahrzeugen meist ohnehin vorhanden sind, können diese dual eingesetzt werden, wobei sogar die Auswertung der Abstandssensorik verwendbar ist, nämlich die Anzahl der erfaßten Objekte, deren Relativgeschwindigkeit und Position. Ebenso können die Fahrzeugzustandsdaten von bereits vorhandenen Sensoren übernommen werden, so daß zusätzliche Hardware nur für die Zentraleinheit und gegebenenfalls für die Verdrahtung von der Zentraleinheit zu den Aktuatoren notwendig ist. Durch die Kombination verschiedener Sensor-Typen für die Abstandssensorik wird eine verbesserte Zuverlässigkeit bei sich ändernden äußeren Bedingungen erreicht. So beeinflußt beispielsweise Nebel die Ergebnisse eines Lidar- Sensors, nicht jedoch von Radar- oder Ultraschall-Sensoren. Zusätzlich kann eine Kamera Anwendung finden, mittels derer auch hintereinander fahrende Kraftfahrzeuge erfaßbar sind. Durch Zuordnung einer digitalen Straßenkarte mit zugehörigem GPS-Empfänger sind zusätzliche Informationen über Straßenführung, Verkehrsschilder und ähnliches zugänglich, so daß das Fahrprofil vorausschauender ermittelt werden kann. Durch Ausbildung der Aktuatoren als x-by-wire-Systeme können die von der Zentraleinheit erzeugten Steuersignale einfach als elektronische Signale direkt den jeweiligen Steuergeräten der x-by- wire-Systeme zugeführt werden.In a preferred embodiment, the means for detecting the vehicle environment designed as distance sensors. Since these are usually anyway in modern motor vehicles are available, they can be used dual, even evaluating the Distance sensors can be used, namely the number of detected objects, the Relative speed and position. Likewise, the vehicle status data from existing sensors are taken over, so that additional hardware only for the central unit and, if necessary, for the wiring from the central unit to the Actuators is necessary. By combining different sensor types for the Distance sensors will provide improved reliability with changing exterior Conditions reached. For example, fog affects the results of a lidar Sensors, but not radar or ultrasonic sensors. In addition, a camera Find application by means of which motor vehicles driving in succession can also be detected. By assigning a digital road map with an associated GPS receiver  additional information about road guidance, traffic signs and the like is accessible, so that the driving profile can be determined more proactively. By training the Actuators as x-by-wire systems can be generated by the central unit Control signals simply as electronic signals directly to the respective control units of the x-by- wire systems are fed.

Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispiels näher erläutert. Die einzige Figur zeigt ein Blockschaltbild der Vorrichtung zur Kraftstoffeinsparung in Kraftfahrzeugen. Die Vorrichtung 1 umfaßt eine Abstandssensorik 2, eine Kamera 3, Sensoren 4, eine Zentraleinheit 5, einen Multiplexer 6 und Aktuatoren 7-9. Die Abstandssensorik 2 ist vorzugsweise als eine Kombination von Lidar-, Radar-, und Ultraschallsensoren ausgebildet. Diese senden einerseits ihre jeweilige Strahlung aus und empfangen andererseits die von Objekten reflektierten Anteile. Aus Laufzeit und Einfallswinkel kann dann auf den Abstand und die Position des Objektes zurückgeschlossen werden. Die Kamera 3 überwacht ebenfalls den Verkehrsraum. Mittels der Kamera 3 sind beispielsweise auch verdeckte Objekte wie dicht hintereinander fahrende Kraftfahrzeuge auflösbar, die von der Abstandssensorik 2 nicht erfaßbar sind. Die Daten der Abstandssensorik 2 und der Kamera 3 werden über Datenleitungen 10 bzw. 11 an die Zentraleinheit 5 übergeben. Anhand dieser Daten kann die Zentraleinheit 5 ein Abbild der Fahrzeugumgebung berechnen. Die Sensoren 4 erfassen für den Verbrauch des Kraftfahrzeuges relevante Parameter wie z. B. Geschwindigkeit, Motordrehzahl, Motormoment und eingelegte Gangstufe. Die erfaßten Daten werden über eine Datenleitung 12 ebenfalls an die Zentraleinheit 5 übergeben. Alternativ können zumindest einige der Daten auch von einem Motorsteuergerät übernommen werden. Die Zentraleinheit 5 berechnet aus den ihr zugeführten Daten ein verbrauchsoptimiertes Fahrprofil. Diese Berechnung soll anhand einiger Überlegungen näher erläutert werden. Für den Kraftstoffverbrauch ist beispielsweise eine gleichmäßige Fahrweise günstiger als eine Vielzahl von Brems- und Beschleunigungsvorgängen. Anhand der ermittelten freien Verkehrsfläche kann ein Geschwindigkeitsbereich ermittelt werden, in dem das Kraftfahrzeug über längere Zeit gleichmäßig fahren könnte. Aus diesem Bereich kann wiederum fahrzeugspezifisch eine Geschwindigkeit mittels empirisch ermittelter Kennfelder ausgewählt werden, die den geringsten Kraftstoffverbrauch bezogen auf die zurückgelegte Strecke hat. Zu dieser Geschwindigkeit existiert ein optimales Parameterpaar Drehzahl/Gangstufe, das ebenfalls einem Kennfeld entnehmbar ist. Zur Umsetzung des derart ermittelten Fahrprofils wird ein Satz Steuersignale für die Aktuatoren 7-9 erzeugt. Dabei kann der Aktuator 7 beispielsweise eine Bremseinrichtung, der Aktuator 8 eine Gaszuführeinrichtung und Aktuator 9 eine Gangwahleinrichtung sein. Dann könnte der Satz Steuersignale beispielsweise zuerst eine Abbremsung bis zu einer gewünschten Geschwindigkeit beinhalten, einen daran anschließenden Gangwechsel mit einer konstanten Gaszufuhr zum Halten der gewünschten Geschwindigkeit. Der Satz von Steuersignalen wird über einen Datenbus 13 an einen Dateneingang des Multiplexers 6 übergeben. Am anderen Dateneingang 14 des Multiplexers 6 liegen die Steuersignale der zu den Aktuatoren 7-9 zugehörigen Pedale und Schalter. Über die Steuerleitung 15 wird ausgewählt, ob die Vorrichtung 1 aktiv ist oder nicht, das heißt welche Steuersignale für die Aktuatoren 7-9 an den Ausgang des Multiplexers 6 durchgeschaltet werden. Die Aktuatoren sind dabei als x-by-wire-Systeme ausgebildet, das heißt mechanisch entkoppelt. Dazu wird einen mechanische Stellgröße in eine elektrische Stellgröße umgewandelt und an ein zugehöriges Steuergerät übergeben, das dann die Steuerung der Komponente rein elektrisch vornimmt. Die von der Zentraleinheit 5 erzeugten Steuersignale können dann direkt an die Steuergeräte der Aktuatoren 7-9 übergeben werden. Die Umschaltung des Multiplexers 6 kann beispielsweise durch einen separaten Schalter oder eine starke Änderung der Brems- oder Gaspedaltätigkeiten erfolgen, um beispielsweise einen Überholvorgang durchzuführen.The invention is explained in more detail below on the basis of a preferred exemplary embodiment. The single figure shows a block diagram of the device for saving fuel in motor vehicles. The device 1 comprises a distance sensor system 2 , a camera 3 , sensors 4 , a central unit 5 , a multiplexer 6 and actuators 7-9. The distance sensor system 2 is preferably designed as a combination of lidar, radar and ultrasonic sensors. On the one hand, these emit their respective radiation and on the other hand they receive the parts reflected by objects. The distance and the position of the object can then be deduced from the runtime and angle of incidence. The camera 3 also monitors the traffic area. By means of the camera 3 , for example, concealed objects such as motor vehicles traveling closely behind one another can also be resolved, which cannot be detected by the distance sensor system 2 . The data from the distance sensors 2 and the camera 3 are transferred to the central unit 5 via data lines 10 and 11, respectively. The central unit 5 can use this data to calculate an image of the vehicle environment. The sensors 4 detect parameters relevant to the consumption of the motor vehicle, such as, for. B. Speed, engine speed, engine torque and gear selected. The acquired data are also transferred to the central unit 5 via a data line 12 . Alternatively, at least some of the data can also be adopted by an engine control unit. The central unit 5 calculates a consumption-optimized driving profile from the data supplied to it. This calculation will be explained in more detail based on a few considerations. For example, a steady driving style is more economical for fuel consumption than a large number of braking and acceleration processes. A speed range in which the motor vehicle could drive smoothly over a long period of time can be determined on the basis of the free traffic area determined. From this area, a vehicle-specific speed can again be selected by means of empirically determined characteristic maps, which has the lowest fuel consumption in relation to the distance traveled. At this speed, there is an optimal pair of parameters, speed / gear, which can also be found in a map. To implement the driving profile determined in this way, a set of control signals is generated for the actuators 7-9 . The actuator 7 can be, for example, a braking device, the actuator 8 a gas supply device and actuator 9 a gear selection device. The set of control signals could then include, for example, first braking to a desired speed, followed by a gear change with a constant gas supply to maintain the desired speed. The set of control signals is transferred via a data bus 13 to a data input of the multiplexer 6 . At the other data input 14 of the multiplexer 6 are the control signals of the pedals and switches associated with the actuators 7-9 . The control line 15 is used to select whether the device 1 is active or not, that is, which control signals for the actuators 7-9 are switched through to the output of the multiplexer 6 . The actuators are designed as x-by-wire systems, that is, mechanically decoupled. For this purpose, a mechanical manipulated variable is converted into an electrical manipulated variable and transferred to an associated control unit, which then controls the component purely electrically. The control signals generated by the central unit 5 can then be transferred directly to the control units of the actuators 7-9 . The multiplexer 6 can be switched, for example, by a separate switch or a major change in the braking or accelerator pedal activities, for example in order to carry out an overtaking process.

Eine weitere Möglichkeit zur Kraftstoffeinsparung ist die zeitweise Abschaltung der Zündung an Verkehrsampeln. Dazu kann beispielsweise auf die Daten einer digitalen Karte eines Navigationssystems zurückgegriffen werden, in der die Länge der Ampelphasen abgelegt sind. Mittels der Kamera 3 kann dann bereits beim Heranfahren an die Ampelanlage registriert werden, wann die Umschaltung erfolgt ist und wie lange ein Stillstand dauern wird, so daß bei längerem Stillstand die Zündung zur Kraftstoffeinsprung ausgeschaltet werden kann.Another way to save fuel is to temporarily switch off the ignition at traffic lights. For this purpose, the data of a digital map of a navigation system can be used, for example, in which the length of the traffic light phases is stored. The camera 3 can then be used to register when the switchover has taken place and how long a standstill will take, so that the ignition for the fuel injection can be switched off in the event of a prolonged standstill.

Claims (10)

1. Vorrichtung zur Kraftstoffeinsparung in Kraftfahrzeugen, umfassend Sensoren zur Erfassung von Fahrzeugzustandsdaten und Mittel zur Erfassung der Fahrzeugumgebung, dadurch gekennzeichnet, daß die Vorrichtung (1) eine Zentraleinheit (5) aufweist, mittels der in Abhängigkeit von der erfaßten Fahrzeugumgebung und den erfaßten Fahrzeugzustandsdaten ein verbrauchsoptimiertes Fahrprofil erstellbar und in Form eines Satzes von Steuersignalen für Aktuatoren (7-9) umsetzbar ist.1. Device for saving fuel in motor vehicles, comprising sensors for detecting vehicle condition data and means for detecting the vehicle environment, characterized in that the device ( 1 ) has a central unit ( 5 ) by means of a function of the detected vehicle environment and the detected vehicle condition data consumption-optimized driving profile can be created and implemented in the form of a set of control signals for actuators ( 7-9 ). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zur Erfassung der Fahrzeugumgebung als Abstandssensoren (2) ausgebildet sind.2. Device according to claim 1, characterized in that the means for detecting the vehicle environment are designed as distance sensors ( 2 ). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Abstandssensoren (2) als Lidar- und/oder Radar- und/oder Ultraschallsensoren ausgebildet sind.3. Apparatus according to claim 2, characterized in that the distance sensors ( 2 ) are designed as lidar and / or radar and / or ultrasonic sensors. 4. Vorrichtung nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Mittel zur Erfassung der Fahrzeugumgebung mindestens eine Kamera (3) umfassen.4. Device according to one of the preceding claims, characterized in that the means for detecting the vehicle environment comprise at least one camera ( 3 ). 5. Vorrichtung nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Mittel zur Erfassung der Fahrzeugumgebung eine digitale Straßenkarte mit zugeordnetem GPS-Empfänger umfassen.5. Device according to one of the preceding claims, characterized in that that the means for detecting the vehicle environment with a digital road map associated GPS receiver include. 6. Vorrichtung nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Aktuatoren (7-9) als eine Bremseinrichtung, eine Gaszuführeinrichtung und eine Gangwähleinrichtung ausgebildet sind. 6. Device according to one of the preceding claims, characterized in that the actuators ( 7-9 ) are designed as a braking device, a gas supply device and a gear selector. 7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Aktuatoren (7-9) eine Lenkeinrichtung und/oder eine Zündeinrichtung ausgebildet sind.7. The device according to claim 6, characterized in that the actuators ( 7-9 ) are designed as a steering device and / or an ignition device. 8. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Aktuatoren (7-9) als x-by-wire-Systeme ausgebildet sind.8. Device according to one of the preceding claims, characterized in that the actuators ( 7-9 ) are designed as x-by-wire systems. 9. Verfahren zur Kraftstoffeinsparung in Kraftfahrzeugen, mittels Sensoren (4) zur Erfassung von Fahrzeugzustandsdaten, Mitteln zur Erfassung der Fahrzeugumgebung und einer Zentraleinheit (5), umfassend folgende Verfahrensschritte:
  • a) Übergabe der erfaßten Fahrzeugzustandsdaten und der Daten der Mittel zur Erfassung der Fahrzeugumgebung an die Zentraleinheit (5),
  • b) Auswertung der Daten der Mittel zur Erfassung der Fahrzeugumgebung zur Ermittlung der Anzahl der umgebenden Objekte, deren Relativgeschwindigkeit und Position,
  • c) Berechnung eines verbrauchsoptimierten Fahrprofils anhand der gemäß Verfahrensschritt b) ermittelten freien Verkehrsfläche unter Berücksichtigung der Fahrzeugzustandsdaten,
  • d) Berechnung eines Satzes von Steuersignalen für Aktuatoren (7-9) des Kraftfahrzeuges zur Umsetzung des Fahrprofils gemäß Verfahrensschritt c).
9. Method for saving fuel in motor vehicles, by means of sensors ( 4 ) for recording vehicle condition data, means for recording the vehicle environment and a central unit ( 5 ), comprising the following method steps:
  • a) transfer of the detected vehicle condition data and the data of the means for detecting the vehicle environment to the central unit ( 5 ),
  • b) evaluating the data of the means for detecting the vehicle environment to determine the number of surrounding objects, their relative speed and position,
  • c) calculation of a consumption-optimized driving profile based on the free traffic area determined according to method step b), taking into account the vehicle condition data,
  • d) calculation of a set of control signals for actuators ( 7-9 ) of the motor vehicle for implementing the driving profile according to method step c).
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß als Fahrzeugzustandsdaten mindestens die Geschwindigkeit, Motordrehzahl und Gangstufe erfaßt werden.10. The method according to claim 9, characterized in that as vehicle condition data at least the speed, engine speed and gear step are recorded.
DE19749582A 1997-11-10 1997-11-10 Fuel economy controlled operation of a road vehicle Withdrawn DE19749582A1 (en)

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DE102007020773A1 (en) 2007-03-19 2008-09-25 Wilfried Fittkau Device for optimizing the efficiency of a vehicle combustion engine comprises a feed section and a removal section for feeding and removing fluid from a reactor chamber
DE102007038059A1 (en) 2007-08-10 2009-02-12 Daimler Ag A method for operating a vehicle and vehicle distance control system with a proximity control system for performing the method
DE102007050504A1 (en) 2007-10-19 2009-04-23 Daimler Ag Driver assistance device for use during operation of vehicle in emission-reduced operation mode, has control unit for implementation of operational functions, and input unit for combined activation of functions by single driver input
WO2009063036A1 (en) * 2007-11-16 2009-05-22 Continental Teves Ag & Co. Ohg Motor vehicle energy saving assistance system
EP2258588A4 (en) * 2008-04-01 2011-08-17 Crambo Sa Device for monitoring vehicle driving
EP2860068A1 (en) * 2008-04-01 2015-04-15 Crambo, S.a. Device for monitoring the process of driving a vehicle
EP2258588A1 (en) * 2008-04-01 2010-12-08 Crambo, S.a. Device for monitoring vehicle driving
WO2009156221A1 (en) * 2008-06-26 2009-12-30 Robert Bosch Gmbh Assistance system for a motor vehicle, method and data carrier therefor
DE102008053103A1 (en) 2008-10-24 2009-06-10 Daimler Ag Optimal operating condition determining method for hybrid vehicle, involves detecting temperature of electric motor as parameter, and determining optimal operating condition by consideration of parameters and torque demand at drive chain
DE102009048783A1 (en) * 2009-10-08 2011-04-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for finding reason of high fuel consumption in hybrid vehicle, involves reading fuel relevant driving-and operating data of motor vehicle, and testing functionality of motor vehicle based on testing procedures
DE102010012739A1 (en) 2010-03-25 2011-09-29 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Method for determining fuel-saving potential of internal combustion engines
DE102010052361A1 (en) * 2010-07-15 2012-02-09 Jean-Yves Goosse Method for reducing loss of kinetic energy while driving vehicle, involves determining current parameter and future parameter and current parameter is compared with future parameter
US8706389B2 (en) 2010-11-18 2014-04-22 Audi Ag Range- and/or consumption calculation with energy costs associated with area segments
DE102010061850A1 (en) * 2010-11-24 2012-05-24 Robert Bosch Gmbh Driving information device for outputting driving information for commercial vehicle, has detection units for outputting information about route situations to control device that converts situations into operating information for vehicle
DE102010061850B4 (en) * 2010-11-24 2013-07-25 Robert Bosch Gmbh Driving information device for operation in a vehicle
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