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EP0340745B1 - Device for feeding a fuel additive into the fuel tank of motor vehicle - Google Patents

Device for feeding a fuel additive into the fuel tank of motor vehicle Download PDF

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Publication number
EP0340745B1
EP0340745B1 EP89107991A EP89107991A EP0340745B1 EP 0340745 B1 EP0340745 B1 EP 0340745B1 EP 89107991 A EP89107991 A EP 89107991A EP 89107991 A EP89107991 A EP 89107991A EP 0340745 B1 EP0340745 B1 EP 0340745B1
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EP
European Patent Office
Prior art keywords
fuel tank
valve
fuel
positive displacement
displacement pump
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.)
Expired - Lifetime
Application number
EP89107991A
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German (de)
French (fr)
Other versions
EP0340745A1 (en
Inventor
Fritz Dr. Naumann
Hans-Günther Haldenwanger
Herwig Reim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Audi AG
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Audi AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Publication of EP0340745A1 publication Critical patent/EP0340745A1/en
Application granted granted Critical
Publication of EP0340745B1 publication Critical patent/EP0340745B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture

Definitions

  • the invention relates to a device for feeding a fuel additive into the fuel tank of a motor vehicle, the additive being admixed to the fuel from a reservoir via a pump device.
  • the object of the invention is to provide a simple, inexpensive and functionally reliable device of the generic type, with which a sufficiently precise admixture of the fuel additive can be carried out.
  • a pressure source present in the motor vehicle in particular a vacuum source, can be used as the medium which drives the positive displacement pump.
  • a control valve and the positive displacement pump with the corresponding connecting lines and two check valves are required.
  • the control valve is actuated directly by the closure of the fuel tank in such a way that the fuel additive is automatically added each time the fuel tank is opened.
  • the schematic drawing shows a device with a vacuum operated diaphragm pump and a two-way control valve.
  • the device shown shows a reservoir (10) for the fuel additive to be supplied to the fuel (e.g. G 15).
  • the storage container (10) can be provided, in a manner not shown, with a display device which visually or acoustically indicates whether additives have to be refilled in the storage container (10).
  • the reservoir (10) is connected via a line (12) to a diaphragm pump (14) as a pump device.
  • the diaphragm pump (14) is composed of a housing (16), an elastic diaphragm as a movable pump element (18) and a spring (20) that biases the diaphragm in one direction.
  • the membrane (18) divides the housing (16) into two chambers (22, 24).
  • the line (12) into which a check valve (26) is switched opens into the chamber (22).
  • the check valve (26) is continuous in the direction of the chamber (22), but is blocked in the opposite direction to the storage container.
  • a further line (28) opens into the chamber (22), into which a second, controllable check valve (30) is switched on.
  • the check valve (30) forms, with a housing section (32) and a membrane (34) carrying the movable valve member, a closed chamber (36), into which the spring (38) prestressing the membrane is also inserted.
  • the line (28) serves to supply the additive either directly into the fuel tank, into the filler pipe of the fuel tank or into a fuel return line of the internal combustion engine.
  • the chamber (24) of the diaphragm pump (14) and the chamber (38) of the controllable check valve (30) are each connected to a two-way control valve (44) via a line (40, 42).
  • the control valve (44) is also connected to a vacuum source of the motor vehicle via a line (46) into which a vacuum reservoir (48) is connected.
  • the vacuum source can either be an existing vacuum pump in the motor vehicle (e.g. for a brake booster) or, in the case of a throttle valve-controlled internal combustion engine, the intake manifold downstream of the throttle valve.
  • the control valve (44) has a control slide (50) projecting from its housing (52), which is biased by an internal spring (54) into a switching state in which it controls the chamber (24) via line (40) Diaphragm pump (14) is ventilated (ventilation valve 53) and the line (42) is applied to the chamber (38) of the controllable valve (30) with negative pressure. This negative pressure causes the check valve (34) to be open.
  • This switching state is assumed by the control valve (44) when the closure (here screw cap 56) of the fuel tank inlet connection (58) is removed (for refueling the motor vehicle).
  • control slide (50) When the fuel tank is closed or the screw cap (56) is screwed on, the control slide (50) is moved into the second switching state by the annular collar (56 a), the line (42) and the chamber (38) of the check valve (30) now being vented (Ventilation slot 51) and the chamber (24) of the diaphragm pump (14) via line (40) is subjected to negative pressure.
  • the control valve (44) assumes the other switching state, in which the line (40) is now vented and the line (42) is subjected to a vacuum. This opens the check valve (30) and the diaphragm (18) is opened by the force of the spring (20). the drawing moves down and the additive in the chamber (22) is supplied to the fuel tank in a defined amount or mixed with the fuel.
  • the amount of additive supplied from the chamber (22) when the motor vehicle is being refueled can be defined so that it is just sufficient when the fuel tank is fully refueled (maximum tank capacity) in order to achieve the intended effect in the internal combustion engine. This prevents overdosing from occurring during normal refueling (statistically approx. 2/3 of the maximum tank content). If necessary, it would be possible to provide a locking lever or a locking valve on the control slide of the control valve (44) (or at another suitable location), via which an admixture of additive can be prevented if the tank cap is to be opened without intentional refueling.
  • the fuel filler cap can expediently be provided with an information label which draws attention to the connection between the opening of the fuel filler cap and the associated admixture of the additive.
  • control valve (44) - or the control valve (44) and the vacuum reservoir (48) as a structural unit - can be arranged directly on the fuel tank or on the fuel filler pipe (58). If necessary, even the entire device shown in the drawing can form a single structural unit.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Zuführen eines Kraftstoff-Zusatzmittels in den Kraftstoffbehälter eines Kraftfahrzeuges, wobei das Zusatzmittel aus einem Vorratsbehälter über eine Pumpeinrichtung dem Kraftstoff zugemischt wird.The invention relates to a device for feeding a fuel additive into the fuel tank of a motor vehicle, the additive being admixed to the fuel from a reservoir via a pump device.

In Ländern mit schlechten Kraftstoffquallitäten kann es angezeigt sein, den Kraftstoff ein Zusatzmittel bzw. Additiv beizumengen, um Funktionsstörungen an der Brennkraftmaschine durch unerwünschte Ablagerungen auszuschließen.In countries with poor fuel quality, it may be appropriate to add an additive to the fuel in order to rule out malfunctions in the internal combustion engine due to undesired deposits.

Aufgabe der Erfindung ist es, eine herstellungstechnisch einfache, kostengünstige und funktionssichere Vorrichtung der gattungsgemäßen Art zu schaffen, mit der eine ausreichend genaue Beimengung des Kraftstoff-Zusatzmittels durchführbar ist.The object of the invention is to provide a simple, inexpensive and functionally reliable device of the generic type, with which a sufficiently precise admixture of the fuel additive can be carried out.

Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte und zweckmäßige Weiterbildungen der Erfindung sind den Patentansprüchen 2 bis 7 entnehmbar.This object is achieved with the characterizing features of claim 1. Advantageous and expedient developments of the invention can be found in claims 2 to 7.

Durch die erfindungsgemäßen Maßnahmen kann eine im Kraftfahrzeug vorhandene Druckquelle, insbesondere eine Unterdruckquelle, als Medium verwendet werden, welches die Verdrängerpumpe antreibt. Als wesentliche Teile sind somit lediglich ein Steuerventil und die Verdrängerpumpe mit den entsprechenden Verbindungsleitungen und zwei Rückschlagventilen erforderlich. Das Steuerventil wird in besonders vorteilhafter Weise unmittelbar von dem Verschluß des Kraftstoffbehälters betätigt, derart, daß mit Jedem Öffnen des Kraftstoffbehälters automatisch eine Beimengung des Kraftstoff-Zusatzmittels erfolgt.By means of the measures according to the invention, a pressure source present in the motor vehicle, in particular a vacuum source, can be used as the medium which drives the positive displacement pump. As essential parts only a control valve and the positive displacement pump with the corresponding connecting lines and two check valves are required. In a particularly advantageous manner, the control valve is actuated directly by the closure of the fuel tank in such a way that the fuel additive is automatically added each time the fuel tank is opened.

Ein Ausführungsbeispiel der Erfindung ist im folgenden mit weiteren Einzelheiten näher erläutert. Die schematische Zeichnung zeigt eine Vorrichtung mit einer unterdruckbetätigten Membranpumpe und einem Zweiwege-Steuerventil.An embodiment of the invention is explained in more detail below with further details. The schematic drawing shows a device with a vacuum operated diaphragm pump and a two-way control valve.

Die dargestellte Vorrichtung zeigt einen Vorratsbehälter (10) für das dem Kraftstoff zuzuführende Kraftstoff-Zusatzmittel (z. B. G 15). Der Vorratsbehälter (10) kann in nicht dargestellter Weise mit einer Anzeigeeinrichtung versehen sein, welche optisch oder akustisch anzeigt, ob Zusatzmittel in den Vorratsbehälter (10) nachzufüllen ist.The device shown shows a reservoir (10) for the fuel additive to be supplied to the fuel (e.g. G 15). The storage container (10) can be provided, in a manner not shown, with a display device which visually or acoustically indicates whether additives have to be refilled in the storage container (10).

Der Vorratsbehälter (10) ist über eine Leitung (12) mit einer Membranpumpe (14) als Pumpeinrichtung verbunden. Die Membranpumpe (14) setzt sich aus einem Gehäuse (16), einer elastische Membrane als bewegliches Pumpenelement (18) und einer die Membrane in einer Richtung vorspannenden Feder (20) zusammen. Die Membrane (18) unterteilt das Gehäuse (16) in zwei Kammern (22,24).The reservoir (10) is connected via a line (12) to a diaphragm pump (14) as a pump device. The diaphragm pump (14) is composed of a housing (16), an elastic diaphragm as a movable pump element (18) and a spring (20) that biases the diaphragm in one direction. The membrane (18) divides the housing (16) into two chambers (22, 24).

In die Kammer (22) mündet die Leitung (12), in die ein Rückschlagventil (26) eingeschaltet ist. Das Rückschlagventil (26) ist in Richtung zur Kammer (22) durchgängig, in Gegenrichtung zum Vorratsbehälter jedoch gesperrt. Ferner mündet in die Kammer (22) eine weitere Leitung (28), in die ein zweites, ansteuerbares Rückschlagventil (30) eingeschaltet ist.The line (12) into which a check valve (26) is switched opens into the chamber (22). The check valve (26) is continuous in the direction of the chamber (22), but is blocked in the opposite direction to the storage container. A further line (28) opens into the chamber (22), into which a second, controllable check valve (30) is switched on.

Das Rückschlagventil (30) bildet mit einem Gehäuseabschnitt (32) und einer das bewegliche Ventilglied tragenden Membrane (34) eine abgeschlossene Kammer (36), in die auch die die Membrane vorspannende Feder (38) eingesetzt ist.The check valve (30) forms, with a housing section (32) and a membrane (34) carrying the movable valve member, a closed chamber (36), into which the spring (38) prestressing the membrane is also inserted.

Die Leitung (28) dient zum Zuführen des Zusatzmittels entweder unmittelbar in den Kraftstoffbehälter, in das Einfüllrohr des Kraftstoffbehälters oder in eine Kraftstoff-Rücklaufleitung der Brennkraftmaschine.The line (28) serves to supply the additive either directly into the fuel tank, into the filler pipe of the fuel tank or into a fuel return line of the internal combustion engine.

Die Kammer (24) der Membranpumpe (14) sowie die Kammer (38) des ansteuerbaren Rückschlagventiles (30) sind über je eine Leitung (40,42) mit einem Zweiwege-Steuerventil (44) verbunden. Ferner ist das Steuerventil (44) über eine Leitung (46), in die ein Unterdruck-Vorratsbehälter (48) eingeschaltet ist, mit einer Unterdruckquelle des Kraftfahrzeuges verbunden. Die Unterdruckquelle kann entweder eine im Kraftfahrzeug vorhandene Unterdruck-Pumpe (z. B. für einen Bremskraftverstärker) oder bei einer Drosselklappen gesteuerten Brennkraf tmaschine das Saugrohr stromab der Drosselklappe sein.The chamber (24) of the diaphragm pump (14) and the chamber (38) of the controllable check valve (30) are each connected to a two-way control valve (44) via a line (40, 42). The control valve (44) is also connected to a vacuum source of the motor vehicle via a line (46) into which a vacuum reservoir (48) is connected. The vacuum source can either be an existing vacuum pump in the motor vehicle (e.g. for a brake booster) or, in the case of a throttle valve-controlled internal combustion engine, the intake manifold downstream of the throttle valve.

Das Steuerventil (44) besitzt einen aus dessen Gehäuse (52) herausragenden Steuerschieber (50), der durch eine innen liegende Feder (54) in einen Schaltzustand vorgespannt ist, in dem er über die Leitung (40) die Kammer (24) .der Membranpumpe (14) belüftet (Belüftungsventil 53) und über die Leitung (42) die Kammer (38) des aufsteuerbaren Ventiles (30) mit Unterdruck beaufschlagt. Diese Unterdruckbeaufschlagung bewirkt, daß das Rückschlagventil (34) geöffnet ist. Diesen Schaltzustand nimmt das Steuerventil (44) ein, wenn der Verschluß (hier Schraubverschlußkappe 56) des Kraftstoffbehälter-Einlaufstutzens (58) abgenommen ist (zum Betanken des Kraftfahrzeuges).The control valve (44) has a control slide (50) projecting from its housing (52), which is biased by an internal spring (54) into a switching state in which it controls the chamber (24) via line (40) Diaphragm pump (14) is ventilated (ventilation valve 53) and the line (42) is applied to the chamber (38) of the controllable valve (30) with negative pressure. This negative pressure causes the check valve (34) to be open. This switching state is assumed by the control valve (44) when the closure (here screw cap 56) of the fuel tank inlet connection (58) is removed (for refueling the motor vehicle).

Bei geschlossenem Kraftstoffbehälter bzw. aufgeschraubter Schraubverschlußkappe (56) wird der Steuerschieber (50) durch den ringförmigen Kragen (56 a) in den zweiten Schaltzustand bewegt, wobei nunmehr die Leitung (42) und die Kammer (38) des Rückschlagventiles (30) belüftet sind (Belüftungsschlitz 51) und die Kammer (24) der Membranpumpe (14) über die Leitung (40) mit Unterdruck beaufschlagt wird.When the fuel tank is closed or the screw cap (56) is screwed on, the control slide (50) is moved into the second switching state by the annular collar (56 a), the line (42) and the chamber (38) of the check valve (30) now being vented (Ventilation slot 51) and the chamber (24) of the diaphragm pump (14) via line (40) is subjected to negative pressure.

Die Funktion der beschriebenen Vorrichtung ist wie folgt:

  • Bei geschlossenem Kraftstoffbehälter bzw. aufgesetzter Schraubverschlußkappe (56) ist über das Steuerventil (44) die Kammer (24) der Membranpumpe (14) mit Unterdruck beaufschlagt, wodurch die Membrane (18) entgegen der Kraft der Feder (20) auf der Zeichnung nach oben bewegt wird. Durch die dabei stattfindende Volumenvergrößerung in der Kammer (22) wird das Rückschlagventil (26) aufgezogen und Kraftstoff-Zusatzmittel aus dem Vorratsbehälter (10) in die Kammer (22) gefördert. Sollte in dieser Stellung aus irgend einem Grunde die Unterdruckversorgung unterbrochen sein oder aussetzen, so reicht die Kraft der Feder (20) nicht aus, um entgegen der Kraft der Feder (38) das Rückschlagventil (30) zu öffnen und ungewollt Zusatzmittel dem Kraftstoffbehälter zuzuführen.
The function of the device described is as follows:
  • When the fuel tank is closed or the screw cap (56) is on, the chamber (24) of the diaphragm pump (14) is pressurized via the control valve (44), causing the diaphragm (18) against the force of the spring (20) on the drawing upwards is moved. As a result of the volume increase taking place in the chamber (22), the check valve (26) is pulled open and fuel additive is conveyed from the reservoir (10) into the chamber (22). If the vacuum supply is interrupted or suspended for any reason in this position, the force of the spring (20) is not sufficient to open the check valve (30) against the force of the spring (38) and inadvertently supply additive to the fuel tank.

Wird nunmehr die Schraubverschlußkappe (56) zum Befüllen des Kraftstoffbehälters geöffnet, so nimmt das Steuerventil (44) den anderen Schaltzustand ein, bei dem nunmehr die Leitung (40) belüftet und die Leitung (42) mit Unterdruck beaufschlagt wird. Dadurch öffnet das Rückschlagventil (30) und es wird durch die Kraft der Feder (20) die Membrane (18) auf. der Zeichnung nach unten bewegt und das in der Kammer (22) befindliche Zusatzmittel in einer definierten Menge dem Kraftstoffbehälter zugeführt bzw. dem Kraftstoff zugemischt.If the screw cap (56) is now opened to fill the fuel tank, the control valve (44) assumes the other switching state, in which the line (40) is now vented and the line (42) is subjected to a vacuum. This opens the check valve (30) and the diaphragm (18) is opened by the force of the spring (20). the drawing moves down and the additive in the chamber (22) is supplied to the fuel tank in a defined amount or mixed with the fuel.

Die jeweils aus der Kammer (22) beim Betanken des Kraftfahrzeuges zugeführte Menge an Zusatzmittel kann so definiert sein, daß sie beim vollständigen Betanken des Kraftstoffbehälters (maximaler Tankinhalt) gerade noch ausreicht, um die beabsichtigte Wirkung in der Brennkraftmaschine zu erfüllen. Dadurch wird vermieden, daß bei der üblichen Betankung (statistisch ca. jeweils 2/3 des maximalen Tankinhaites) keine Überdosierung erfolgt. Gegebenenfalls wäre es möglich, an dem Steuerschieber des Steuerventiles (44) (oder an einer anderen geeigneten Stelle) ein Sperrhebelchen oder ein Sperrventil vorzusehen, über welches eine Zumischung von Zusatzmittel unterbindbar ist, wenn der Tankverschluß ohne beabsichtigtes Auftanken geöffnet werden soll. Der Tankverschluß kann zweckmäßig mit einem Hinweisschild versehen sein, welches auf den Zusammenhang zwischen dem Öffnen des Tankverschlusses und dem damit verbundenen Zumischen des Zusatzmittels aufmerksam macht.The amount of additive supplied from the chamber (22) when the motor vehicle is being refueled can be defined so that it is just sufficient when the fuel tank is fully refueled (maximum tank capacity) in order to achieve the intended effect in the internal combustion engine. This prevents overdosing from occurring during normal refueling (statistically approx. 2/3 of the maximum tank content). If necessary, it would be possible to provide a locking lever or a locking valve on the control slide of the control valve (44) (or at another suitable location), via which an admixture of additive can be prevented if the tank cap is to be opened without intentional refueling. The fuel filler cap can expediently be provided with an information label which draws attention to the connection between the opening of the fuel filler cap and the associated admixture of the additive.

In nicht dargestellter Weise kann das Steuerventil (44) - oder das Steuerventil (44) und der Unterdruck-Vorratsbehälter (48) als Baueinheit - unmittelbar am Kraftstoffbehälter oder am Kraftstoffeinfüllrohr (58) angeordnet sein. Gegebenenfalls kann sogar die gesamte, in der Zeichung dargestellte Vorrichtung eine einzige Baueinheit bilden.In a manner not shown, the control valve (44) - or the control valve (44) and the vacuum reservoir (48) as a structural unit - can be arranged directly on the fuel tank or on the fuel filler pipe (58). If necessary, even the entire device shown in the drawing can form a single structural unit.

Claims (7)

1. Device for feeding a fuel additive into the fuel tank of a motor vehicle, the additive being mixed into the fuel from a reservoir via a positive displacement pump, characterized in that the positive displacement pump (14) is pneumatically actuated and its moveable pump element (18) can be displaced under pressure control via a control valve (44) counter to the force of a prestressed spring (20) and in the process, for the purpose of delivering a defined quantity, displaces the volume of a chamber (22) connected to the reservoir (10) and the fuel tank, a nonreturn valve (26, 30) opening towards the fuel tank being inserted in each case between reservoir (10) and chamber (22) and between chamber (22) and fuel tank, and in that the control valve (44) is a two-way valve which, in one control state, connects the positive displacement pump (14) to the pressure source and, in the other control state, connects the nonreturn valve (30) between positive displacement pump and fuel tank, said nonreturn valve being designed as a controllable valve, to the pressure source.
2. Device according to Claim 1, characterized in that the positive displacement pump is a diaphragm pump.
3. Device according to Claims 1 and 2, characterized in that the positive displacement pump is vacuum-actuated and in that a vacuum reservoir (48) is arranged between the control valve (44) and the vacuum source.
4. Device according to Claim 3, characterized in that the control valve (44) connects the chamber (24, 38), which is not subjected to a vacuum at a particular time, of the positive displacement pump (14) or of the nonreturn valve (30), respectively, to the atmosphere.
5. Device according to one or more of Claims 1 to 4, characterized in that the control valve (44) is controlled by the cap (56) of the fuel tank.
6. Device according to Claim 5, characterized in 5 that the control valve (44) is arranged adjacent to the filler pipe (58) of the fuel tank and is actuated directly by the fuel tank cap (56).
EP89107991A 1988-05-06 1989-05-03 Device for feeding a fuel additive into the fuel tank of motor vehicle Expired - Lifetime EP0340745B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3815523 1988-05-06
DE3815523A DE3815523C1 (en) 1988-05-06 1988-05-06

Publications (2)

Publication Number Publication Date
EP0340745A1 EP0340745A1 (en) 1989-11-08
EP0340745B1 true EP0340745B1 (en) 1990-11-07

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ID=6353828

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EP89107991A Expired - Lifetime EP0340745B1 (en) 1988-05-06 1989-05-03 Device for feeding a fuel additive into the fuel tank of motor vehicle

Country Status (5)

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US (1) US4936261A (en)
EP (1) EP0340745B1 (en)
JP (1) JPH01315656A (en)
DE (2) DE3815523C1 (en)
ES (1) ES2019482B3 (en)

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DE4106697C1 (en) * 1991-03-02 1992-04-09 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Fuel additive dosing device - is used in vehicle and incorporates cylinder divided into two working chambers by piston
FR2702009B1 (en) * 1993-02-23 1995-05-19 Rhone Poulenc Chimie Method and device for automatically injecting an additive into the fuel tank of a motor vehicle.
WO2006007535A1 (en) * 2004-07-01 2006-01-19 Clean Diesel Technologies, Inc. Fuel additive concentrate dosing system
US7270088B2 (en) * 2005-03-08 2007-09-18 William Trace Whitehall System and method for storage and delivery of a fuel additive to a fuel tank
FR2886980A1 (en) 2005-06-09 2006-12-15 Ti Fuel Systems Sas Soc Par Ac METHOD FOR DETERMINING AN ADDITIVE FROM A FUEL ADDITIVE SYSTEM, THIS SYSTEM, FUEL SUPPLY SYSTEM, AND METHOD FOR CARRYING OUT A VEHICLE
US8290684B2 (en) * 2009-05-26 2012-10-16 GM Global Technology Operations LLC Fuel stability methods and systems
US20110194953A1 (en) * 2010-02-11 2011-08-11 Vesco Oil Corporation Transmission additive injection assembly
US9016330B2 (en) * 2011-07-12 2015-04-28 Robert J. Hunt System, device, and method for treating fuel
US8694186B2 (en) * 2011-07-27 2014-04-08 Ford Global Technologies, Llc Method and system for engine control

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FR637907A (en) * 1926-11-20 1928-05-11 Improvements to vehicle lubrication systems
US2848067A (en) * 1956-03-05 1958-08-19 Mcneil Machine & Eng Co Lubricating system
CH525387A (en) * 1970-07-22 1972-07-15 Vismara Carlo Device for feeding and dosing a fluid for the elimination of smoke in diesel engines, with mixing with the fuel oil to the tank
DE2458711A1 (en) * 1974-12-11 1976-06-16 Assa Ab Automatic greasing system for construction vehicle - with greasing impulse generated every time ignition or handbrake is activated
US4596277A (en) * 1984-11-01 1986-06-24 Stanadyne, Inc. Additive metering system
US4621593A (en) * 1984-12-24 1986-11-11 Ford Motor Company Automotive dispensing apparatus for fuel additive
GB8515487D0 (en) * 1985-06-19 1985-07-24 Towman Technical Petrol engines
DE3626419A1 (en) * 1986-08-05 1988-02-18 Bayerische Motoren Werke Ag Fuel additive feed device
US4727827A (en) * 1986-11-25 1988-03-01 General Motors Corporation Fuel additive metering system

Also Published As

Publication number Publication date
JPH01315656A (en) 1989-12-20
US4936261A (en) 1990-06-26
DE58900023D1 (en) 1990-12-13
DE3815523C1 (en) 1989-01-19
EP0340745A1 (en) 1989-11-08
ES2019482B3 (en) 1991-06-16

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