EP0340745B1 - Vorrichtung zum Zuführen eines Kraftstoff-Zusatzmittels in den Kraftstoffbehälter eines Kraftfahrzeuges - Google Patents

Vorrichtung zum Zuführen eines Kraftstoff-Zusatzmittels in den Kraftstoffbehälter eines Kraftfahrzeuges 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
Authority
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
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0340745A1 (de
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
Original Assignee
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
Application filed by Audi AG filed Critical Audi AG
Publication of EP0340745A1 publication Critical patent/EP0340745A1/de
Application granted granted Critical
Publication of EP0340745B1 publication Critical patent/EP0340745B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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.

Landscapes

  • 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)
EP89107991A 1988-05-06 1989-05-03 Vorrichtung zum Zuführen eines Kraftstoff-Zusatzmittels in den Kraftstoffbehälter eines Kraftfahrzeuges Expired - Lifetime EP0340745B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6353828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107991A Expired - Lifetime EP0340745B1 (de) 1988-05-06 1989-05-03 Vorrichtung zum Zuführen eines Kraftstoff-Zusatzmittels in den Kraftstoffbehälter eines Kraftfahrzeuges

Country Status (5)

Country Link
US (1) US4936261A (enrdf_load_stackoverflow)
EP (1) EP0340745B1 (enrdf_load_stackoverflow)
JP (1) JPH01315656A (enrdf_load_stackoverflow)
DE (2) DE3815523C1 (enrdf_load_stackoverflow)
ES (1) ES2019482B3 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (fr) * 1993-02-23 1995-05-19 Rhone Poulenc Chimie Procédé et dispositif d'injection automatique d'un additif dans le réservoir de carburant d'un véhicule automobile.
GB2430979B (en) * 2004-07-01 2008-06-11 Clean Diesel Tech 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 (fr) 2005-06-09 2006-12-15 Ti Fuel Systems Sas Soc Par Ac Procede de dosage d'un additif a partir d'un systeme a additif pour carburant, ce systeme, systeme d'alimentation en carburant, et procede pour l'entretien d'un vehicule
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

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR637907A (fr) * 1926-11-20 1928-05-11 Perfectionnements aux dispositifs de graissage pour véhicules
US2848067A (en) * 1956-03-05 1958-08-19 Mcneil Machine & Eng Co Lubricating system
CH525387A (it) * 1970-07-22 1972-07-15 Vismara Carlo Dispositivo di alimentazione e dosaggio di un fluido per l'eliminazione della fumosità in motori diesel, con miscelazione alla nafta di alimentazione al serbatoio
DE2458711A1 (de) * 1974-12-11 1976-06-16 Assa Ab Verfahren und vorrichtung zur periodischen automatischen schmierung eines fahrzeuges
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 (de) * 1986-08-05 1988-02-18 Bayerische Motoren Werke Ag Vorrichtung zum zufuehren eines kraftstoff-zusatzmittels
US4727827A (en) * 1986-11-25 1988-03-01 General Motors Corporation Fuel additive metering system

Also Published As

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

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