DE19922748A1 - Automatic selection of type of fuel for driving motor vehicle with at least two different selectable types of fuel using electronic control unit to which is transmitted data - Google Patents

Automatic selection of type of fuel for driving motor vehicle with at least two different selectable types of fuel using electronic control unit to which is transmitted data

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Publication number
DE19922748A1
DE19922748A1 DE19922748A DE19922748A DE19922748A1 DE 19922748 A1 DE19922748 A1 DE 19922748A1 DE 19922748 A DE19922748 A DE 19922748A DE 19922748 A DE19922748 A DE 19922748A DE 19922748 A1 DE19922748 A1 DE 19922748A1
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Germany
Prior art keywords
control unit
electronic control
fuel
vehicle
motor vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19922748A
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German (de)
Other versions
DE19922748C2 (en
Inventor
Falk Gerbig
Martin Geier
Edgar Heck
Franz Dietmar
Klaus Scheuerer
Claus Dorrer
Michael Heitzer
Markus Schneider
Juergen Turini
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE19922748A priority Critical patent/DE19922748C2/en
Publication of DE19922748A1 publication Critical patent/DE19922748A1/en
Application granted granted Critical
Publication of DE19922748C2 publication Critical patent/DE19922748C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0602—Control of components of the fuel supply system
    • F02D19/0613—Switch-over from one fuel to another
    • F02D19/0618—Switch-over from one fuel to another depending on the engine's or vehicle's position, e.g. on/off road or proximity to a harbor
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0611—Fuel type, fuel composition or fuel quality
    • F02D2200/0612—Fuel type, fuel composition or fuel quality determined by estimation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
    • F02D2200/604—Engine control mode selected by driver, e.g. to manually start particle filter regeneration or to select driving style
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/701—Information about vehicle position, e.g. from navigation system or GPS signal
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The selection method is carried out, so that the electronic control unit is supplied with data for determining the instantaneous type of vehicle drive and/or the instantaneous vehicle surroundings. The electronic control unit in the event of an emission intensive vehicle type of drive and/or a vehicle surroundings, which in special measures, requires an emission redn., automatically the type of fuel is selected, which causes the least emissions.

Description

Die Erfindung bezieht sich auf ein Verfahren zur automatischen Auswahl einer Kraftstoffart nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for automatic selection a type of fuel according to the preamble of claim 1.

Ein derartiges Verfahren ist beispielsweise aus der US 5755211 bekannt. Hierbei findet eine automatische Auswahl einer von zwei Kraftstoffarten lediglich in Abhängigkeit vom erreichten minimal zulässigen Füllstand des jeweiligen Kraftstofftanks statt.Such a method is known for example from US 5755211. This automatically selects one of two types of fuel only depending on the minimum permissible fill level of the respective fuel tanks instead.

Zur Senkung der Umweltbelastung können Kraftfahrzeuge allein oder zusätzlich zur Verwendung mit Flüssigkraftstoffen, insbesondere mit Benzin oder Diesel, auch mit umweltverträglicheren gasförmigen Kraftstoffen, insbesondere Erdgas oder Wasserstoff, betrieben werden. Solange kein flächendeckendes Gastankstellennetz verfügbar ist oder der gasförmige Kraftstoff nur in kleineren Mengen im Fahrzeug zur Verfügung steht, können Kraftfahrzeuge für hohe Reichweiten nicht, ausschließlich mit gasförmigem Kraftstoff betrieben werden. Bei bekannten sog. Dual-Fuel-Fahrzeugen mit flüssigen und gasförmigen Kraftstoffen wird meist zuerst der gasförmige Kraftstoff verbraucht und nötigenfalls anschließend der flüssige Kraftstoff bis zur nächsten Gastankstelle verwendet.To reduce environmental pollution, motor vehicles can be used alone or in addition to use with liquid fuels, especially gasoline or diesel, even with more environmentally friendly gaseous fuels, especially natural gas or hydrogen. As long as none nationwide gas filling station network is available or the gaseous Fuel can only be available in small quantities in the vehicle Motor vehicles for long ranges are not, only with gaseous Fuel operated. In known so-called dual-fuel vehicles Liquid and gaseous fuels usually become gaseous first  Fuel is consumed and then, if necessary, the liquid fuel used to the next gas filling station.

Aus der US 3659574 ist ein Verfahren bekannt, bei dem eine manuelle willkürliche Auswahl einer von zwei Kraftstoffarten (Benzin oder Gas) durch eine Bedienperson ermöglicht wird. Die Bedingung zum Umschalten von einer Kraftstoffart in die andere muß der Fahrer selbst festlegen.From US 3659574 a method is known in which a manual arbitrary selection of one of two types of fuel (gasoline or gas) an operator is enabled. The condition to switch from the driver must determine one type of fuel into the other.

Die Reichweite mit einer Gasfüllung ist derzeit bei komprimiertem Erdgas z. B. auf 200 km begrenzt. Deshalb muß entweder sehr häufig zu einer Gastankstelle gefahren werden oder der umweltschonende Gasbetrieb wird nicht ausreichend genutzt.The range with a gas filling is currently with compressed natural gas e.g. B. limited to 200 km. Therefore, one must either very often Gas filling station to be driven or the environmentally friendly gas operation underused.

Es ist Aufgabe der Erfindung, ein Verfahren eingangs genannter Art derart zu verbessern, daß trotz einer nur relativ geringen Menge Kraftstoffes für emissionsärmeren Betrieb in einem Kraftfahrzeug mit mindestens zwei Kraftstoffarten eine optimierte, den Betriebsarten und Umgebungsbedingungen angepaßte Nutzung erreicht wird.It is an object of the invention to provide a method of the type mentioned at the outset to improve that despite a relatively small amount of fuel for low-emission operation in a motor vehicle with at least two Fuel types an optimized, the operating modes and Use adapted to environmental conditions is achieved.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind die Gegenstände der abhängigen Patentansprüche.This object is achieved by the features of patent claim 1. Advantageous developments of the invention are the subjects of dependent claims.

Erfindungsgemäß werden bei dem Verfahren zur automatischen Auswahl einer Kraftstoffart zum Antrieb eines Kraftfahrzeuges mit mindestens zwei verschiedenen wählbaren Kraftstoffarten mittels eines elektronischen Steuergeräts, dem elektronischen Steuergerät Informationen zur Bestimmung der momentanen Fahrzeugbetriebsart und/oder der momentanen Fahrzeugumgebung übermittelt. Die Fahrzeugbetriebsart kann z. B. ein Kaltstart der Brennkraftmaschine bzw. des Katalysators sein. Die Fahrzeugumgebung können z. B. Verkehrssituationen, wie Stau oder stop- and-go-Betrieb, sowie Umweltbedingungen, wie Smog oder ortsbezogen ein Stadtgebiet oder eine Kurzone, sein.According to the invention, the method for automatic selection a fuel type for driving a motor vehicle with at least two various selectable types of fuel using an electronic Control unit, the electronic control unit information for Determination of the current vehicle operating mode and / or the current vehicle environment. The vehicle operating mode can e.g. B. a cold start of the internal combustion engine or the catalyst. The  Vehicle environment can e.g. B. traffic situations such as traffic jams or stop and-go operation, as well as environmental conditions such as smog or location-based Urban area or a short zone.

Eine Brennkraftmaschine kann auch bei Betrieb mit flüssigen Kraftstoffen, insbesondere betriebswarm und mit geregeltem Katalysator, schadstoffarm arbeiten.An internal combustion engine can also operate with liquid fuels, especially warm from operation and with regulated catalyst, low in pollutants work.

Das elektronische Steuergerät ist derart ausgestaltet bzw. programmiert, daß im Falle einer emissionsintensiven Fahrzeugbetriebsart und/oder einer Fahrzeugumgebungsbedingung, die im besonderen Maß eine Schadstoffreduzierung erfordert, automatisch die weniger Emissionen verursachende Kraftstoffart ausgewählt wird.The electronic control device is designed or programmed such that in the case of an emission-intensive vehicle operating mode and / or Vehicle environmental condition, which is a particular degree Pollutant reduction automatically requires less emissions causing fuel type is selected.

Vorzugsweise ist das elektronische Steuergerät ein erweitertes, ohnehin im Fahrzeug vorhandenes Motorsteuergerät, dem üblicherweise Sensorsignale zur Übermittlung von Informationen über die Fahrzeugbetriebsart zur Verfügung stehen. Derartige Sensorsignale sind z. B. die Stellung des Fahrpedals, die Motor- bzw. Brennkraftmaschinendrehzahl, die Motor- oder Katalysatortemperatur oder die Fahrzeuggeschwindigkeit.Preferably, the electronic control unit is an expanded one, anyway Vehicle existing engine control unit, which is usually sensor signals to transmit information about the vehicle operating mode To be available. Such sensor signals are e.g. B. the position of Accelerator pedal, the engine or engine speed, the engine or Catalyst temperature or vehicle speed.

Durch Auswertung des Verlaufes der Fahrzeuggeschwindigkeit über der Zeit kann das elektronische Steuergerät z. B. stop-and-go-Betrieb selbständig erkennen. Im einfachsten Fall genügen dazu die ohnehin vorhandenen Sensoren, so daß lediglich die Software erweitert werden muß.By evaluating the course of the vehicle speed over time can the electronic control unit such. B. stop-and-go operation independently detect. In the simplest case, the existing ones are sufficient Sensors, so that only the software needs to be expanded.

in einer weiteren vorteilhaften Ausgestaltung der Erfindung erhält das elektronische Steuergerät die Informationen zur Bestimmung der Fahrzeugumgebung durch eine Verbindung zu einem im Kraftfahrzeug vorhandenen Fahrerassistenzsystem. Beispielsweise sind Fahrerassistenzsysteme in Form von Navigationssystemen (z. B. CARIN) oder situationsadaptiven Antriebsmanagement-Systemen (z. B. SAM) bekannt.in a further advantageous embodiment of the invention, the electronic control unit the information to determine the Vehicle environment through a connection to a vehicle existing driver assistance system. For example  Driver assistance systems in the form of navigation systems (e.g. CARIN) or situation-adaptive drive management systems (e.g. SAM) known.

Unter dem Begriff Fahrerassistenzsystem kann sowohl das Gesamt- Fahrerassistenzsystem einschließlich der Anzeige- und/oder Eingabeeinheiten für die Bedienperson oder aber auch nur der interne informationsverarbeitende Teil eines derartigen Gesamt- Fahrerassistenzsystems verstanden werden.Under the term driver assistance system, both the overall Driver assistance system including the display and / or Input units for the operator or just the internal one information processing part of such an overall Driver assistance system can be understood.

Das Fahrerassistenzsystem bzw. das elektronische Steuergerät erhält vorzugsweise die Informationen zur Bestimmung der Fahrzeugumgebung durch eine Funkverbindung zu einem kraftfahrzeugexternen Informationsträger. Derartige Informationsträger sind beispielsweise als Global Positioning System (GPS), Radio Data System (RDS), Traffic Message Channel oder Verkehrsschilder mit elektronischen Sendern bekannt.The driver assistance system or the electronic control unit receives preferably the information for determining the vehicle environment through a radio connection to an external vehicle Information carrier. Such information carriers are, for example, as Global Positioning System (GPS), Radio Data System (RDS), Traffic Message channel or traffic signs with electronic transmitters known.

Weiterhin ist das elektronische Steuergerät in einer Weiterbildung der Erfindung mit einem manuell zu betätigenden Auswahlschalter verbunden, durch dessen entsprechende Betätigung die automatische Auswahl ausgeschaltet werden kann. Damit ist der Bedienperson des Fahrzeuges weiterhin die Möglichkeit gegeben, im Bedarfsfall durch die Bedienung eines manuellen Auswahlschalters selbst die Kraftstoffart zu wählen.Furthermore, the electronic control unit is a further development of Invention connected to a manually operated selection switch, automatic selection by pressing it accordingly can be turned off. This is the operator of the vehicle still given the option of operating a manual selector switch to select the fuel type yourself.

Durch das erfindungsgemäße Verfahren können insbesondere sog. Dual- Fuel-Fahrzeuge mit flüssigem Kraftstoff (z. B. Benzin oder Diesel) und mit gasförmigem Kraftstoff (z. B. Erdgas oder Wasserstoff) trotz begrenztem Gasvorrat im Fahrzeug und trotz geringer Gastankstellendichte eine verhältnismäßig hohe Reichweite bei optimierter Umweltverträglichkeit bieten.By means of the method according to the invention, so-called dual Fuel vehicles with liquid fuel (e.g. petrol or diesel) and with gaseous fuel (e.g. natural gas or hydrogen) despite limited Gas supply in the vehicle and one despite the low gas filling station density relatively long range with optimized environmental compatibility Offer.

Claims (5)

1. Verfahren zur automatischen Auswahl einer Kraftstoffart zum Antrieb eines Kraftfahrzeuges mit mindestens zwei verschiedenen wählbaren Kraftstoffarten mittels eines elektronischen Steuergeräts, dadurch gekennzeichnet, daß dem elektronischen Steuergerät Informationen zur Bestimmung der momentanen Fahrzeugbetriebsart und/oder der momentanen Fahrzeugumgebung übermittelt werden und daß das elektronische Steuergerät im Falle einer emissionsintensiven Fahrzeugbetriebsart und/oder einer Fahrzeugumgebung, die im besonderen Maß eine Emissionsreduzierung erfordert, automatisch die weniger Emissionen verursachende Kraftstoffart auswählt.1. A method for the automatic selection of a fuel type for driving a motor vehicle with at least two different selectable fuel types by means of an electronic control unit, characterized in that the electronic control unit information for determining the current vehicle operating mode and / or the current vehicle environment are transmitted and that the electronic control unit in In the case of an emission-intensive vehicle operating mode and / or a vehicle environment that particularly requires an emission reduction, the fuel type which causes less emissions is automatically selected. 2. Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, daß das elektronische Steuergerät die Fahrzeugbetriebsart (z. B. stop-and-go- Betrieb) durch Auswertung im Fahrzeug üblicherweise ohnehin erfaßter Informationen (z. B. Sensorsignale) selbst erkennt.2. The method according to claim 1, characterized in that the electronic control unit the vehicle operating mode (e.g. stop-and-go- Operation) usually recorded anyway by evaluation in the vehicle Detects information (e.g. sensor signals) itself. 3. Verfahren nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, daß das elektronische Steuergerät die Informationen zur Bestimmung der Fahrzeugumgebung durch eine Verbindung zu einem im Kraftfahrzeug vorhandenen Fahrerassistenzsystem erhält. 3. The method according to claim 1 or 2, characterized in that the electronic control unit the information for determination the vehicle environment by connecting to an im Motor vehicle existing driver assistance system receives.   4. Verfahren nach einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, daß das elektronische Steuergerät oder das mit diesem verbundene Fahrerassistenzsystem die Informationen zur Bestimmung der Fahrzeugumgebung durch eine Funkverbindung zu einem kraftfahrzeugexternen Informationsträger erhält.4. The method according to any one of claims 1 to 3, characterized characterized in that the electronic control unit or the This connected driver assistance system provides information on Determination of the vehicle environment through a radio link receives an information carrier external to the motor vehicle. 5. Verfahren nach einem der Patentansprüche 1 bis 4, dadurch gekennzeichnet, daß das elektronische Steuergerät mit einem manuell zu betätigenden Auswahlschalter verbunden ist, durch dessen entsprechende Betätigung die automatische Auswahl ausgeschaltet werden kann.5. The method according to any one of claims 1 to 4, characterized characterized in that the electronic control unit with a manual to be operated selection switch is connected by its the corresponding selection disables the automatic selection can be.
DE19922748A 1999-05-18 1999-05-18 Procedure for automatic selection of a fuel type Expired - Fee Related DE19922748C2 (en)

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Application Number Priority Date Filing Date Title
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DE19922748C2 DE19922748C2 (en) 2001-05-17

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