DE3108668A1 - Fuel preheating device - Google Patents

Fuel preheating device

Info

Publication number
DE3108668A1
DE3108668A1 DE19813108668 DE3108668A DE3108668A1 DE 3108668 A1 DE3108668 A1 DE 3108668A1 DE 19813108668 DE19813108668 DE 19813108668 DE 3108668 A DE3108668 A DE 3108668A DE 3108668 A1 DE3108668 A1 DE 3108668A1
Authority
DE
Germany
Prior art keywords
fuel
high pressure
pressure part
piece
feed 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.)
Withdrawn
Application number
DE19813108668
Other languages
German (de)
Inventor
Heinz 7891 Küssaberg Schell
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19813108668 priority Critical patent/DE3108668A1/en
Priority to GB8116959A priority patent/GB2078298A/en
Priority to SE8103563A priority patent/SE8103563L/en
Priority to FR8111237A priority patent/FR2484023A1/en
Priority to NL8102731A priority patent/NL8102731A/en
Publication of DE3108668A1 publication Critical patent/DE3108668A1/en
Withdrawn legal-status Critical Current

Links

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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
    • F02M31/125—Fuel
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/16—Other apparatus for heating fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0029—Pressure regulator in the low pressure fuel system
    • 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
    • Y02T10/12—Improving ICE efficiencies

Abstract

In a fuel preheating device for diesel engines in accordance with the main application P 3021282.9, in which the fuel fed to the high pressure part of the injection pump is preheated, the excess fuel returned from the high pressure part in a return line is fed back by means of a T-piece into the intake line of the feed pump and made available to the high pressure part again. In this way a considerable amount of the heat energy needed for fuel preheating is saved.

Description

Vorrichtung zur Kraftstoffvorwärmung Device for fuel preheating

(Zusatz zu P 30 21 282.9) Die Erfindung betrifft eine Weiterbildung der in der Patentanmeldung P 30 21 282.9 beschriebenen Kraftstoffvorwärmeinrichtung. Bei der Vorrichtung gemäß Hauptanmeldung fällt im Hochdruckteil der Einspritzpumpe wie bei jeder Einspritzpumpe üblicher Bauart im Teillastbetrieb Uberschußkraftstoff an, der nicht zur Einspritzung gelangt. Bei dieser Konstruktion gelangt der Uberschußkraftstoff durch eine Kraftstoffrückführleitung in den Fahrzeugtank zurück. Da der Überschußkraftstoff einen großen Teil der eingespritzten Kraftstoffmenge ausmachen kann, geht ein großer Teil der Heizleistung, der unmittelbar vor dem Hochdruckteil der Einspritzpumpe aufgebracht wird, wieder verloren. (Addition to P 30 21 282.9) The invention relates to a further development the fuel preheating device described in patent application P 30 21 282.9. In the device according to the main application, the injection pump falls in the high pressure part As with every injection pump of the usual type, excess fuel in partial load operation which does not reach the injection. With this construction, the excess fuel gets back to the vehicle tank through a fuel return line. Because the excess fuel can make up a large part of the amount of fuel injected, a large one goes Part of the heating power that is immediately before the high-pressure part of the injection pump is applied, lost again.

Die Aufgabe der vorliegenden Erfindung besteht darin, diesen Wärmeverlust zu verringern.The object of the present invention is to reduce this heat loss to reduce.

Erfindungsgemäß wird dies mit den Merkmalen des Kennzcichnungsteiles des Anspruches 1 erreicht.According to the invention, this is done with the features of the identification part of claim 1 achieved.

Der Überschuß anteil des in der elektrischen Heizung vorgewärmten Kraftstoffes, der nicht zur Einspritzung im Motor gelangt, wird auf diese Weise ohne Rückführung in den Kraftstofftank sofort wieder angesaugt und der elektrischen eizung sowie dem Hochdruckteil der Pumpe erneut zugeführt.The excess portion of that preheated in the electric heater Fuel that is not injected into the engine is in this way immediately sucked back in without return to the fuel tank and the electrical heating and the high-pressure part of the pump are supplied again.

Ein erheblicher Teil des Kraftstoffes wird also in erwärmtem Zustand im Kreislauf bewegt, wodurch ein großer Teil der Heizleistung eingespart werden kann. Das Überdruckventil sichert in der Rückführleitung und im Hochdruckteil der Einspritzpumpe den zur ordnungsgemäßen Funktion der Einspritzpumpe erforderlichen Rückstaudruck.A significant part of the fuel is therefore in a heated state moved in a circuit, which saves a large part of the heating power can. The pressure relief valve secures in the return line and in the high pressure part of the Injection pump those required for the correct function of the injection pump Back pressure.

Vorteilhaft ist die erfindungsgemäße Vorrichtung durch die Merkmale des Anspruches 2 gekennzeichnet. Auf diese Weise sind Ventil und T-Stück in baulicher Einheit kostengünstiger herstellbar und montierbar ausgeildet.The device according to the invention is advantageous due to the features of claim 2 characterized. In this way, the valve and T-piece are more structurally Unit designed to be cheaper to manufacture and assemble.

In der Zeichnung ist die Erfindung beispielsweise und schematisch dargestellt.In the drawing, the invention is exemplified and schematic shown.

Die der Fig. 2 der Hauptanmeldung im wesentlichen entsprechende Figur zeigt die Heizvorrichtung 1, der aus einem Tank 2 über eine Ansaugleitung 7 und eine Förderpumpe 8 sowie ein Kraftstoffilter 6 und dazwischengeschaltete Leitungen 7' und 7" Kraftstoff zugeführt wird. Von der Förderpumpe 8 überschüssig geförderter Kraftstoff gelangt über eine Ringleitung 9 zum Tank 2 zurück.The figure essentially corresponding to FIG. 2 of the main application shows the heating device 1, which comes from a tank 2 via a suction line 7 and a feed pump 8 and a fuel filter 6 and lines connected in between 7 'and 7 "of fuel is supplied. From the feed pump 8, excess conveyed Fuel returns to tank 2 via a ring line 9.

Die Förderpumpe 8 ist in einer Einspritzpumpe 5 mit Hochdruckteil 4 integriert ausgebildet.The feed pump 8 is in an injection pump 5 with a high pressure part 4 integrally formed.

Die Heizvorrichtung 1 ist dem Hochdruckteil 4 der Einspritzpumpe baulich unmittelbar vorgeschaltet, so daß vom Hochdruckteil 4 über die in der Figur dargestellten Einspritzleitungen einem Motor 3 zugeführter Kraftstoff unmittelEar vor der Einspritzung erwärmt wird.The heating device 1 is structurally the high pressure part 4 of the injection pump directly upstream, so that from the high pressure part 4 via the one shown in the figure Injection lines an engine 3 supplied fuel immediately before the injection is heated.

Bei der üblichen Ausbildung der Einspritzpumpe 5 mit an einer Steuerkante steuernden Hochdruckstempeln im Hochdruckteil 4 fällt bei Teillast eine erhebliche Menge von Uberschußkraftstoff an, die abzuleiten ist. Erfindungsgemäß geschieht dies über eine Rüxlfünrleitung 11 zu einem T-Stück 30 in der Ansaugleitung 7 der Förderpumpe 8. Der bereits erwärmte überschüssige Kraftstoff aus dem Hochdruckteil 4 der Einspritzpumpe wird daher von der Förderpumpe 8 der Heizvorrichtung 1 im noch erwärniten Zustand wieder zurückgeführt, wodurch Wärmeverluste vermieden werden.In the usual design of the injection pump 5 with one control edge controlling high pressure rams in the high pressure part 4 falls at part load a considerable Amount of excess fuel to be diverted. According to the invention happens this Via a Rüxlfünrleitung 11 to a T-piece 30 in the suction line 7 of the feed pump 8. The already heated excess fuel from the high-pressure part 4 of the injection pump is therefore of the feed pump 8 of the heating device 1 in the still heated state, which prevents heat losses.

Zur Erhaltung des betriebsnotwendigen Rückstaudruckes im Hochdruckteil 4 ist in der Rückführleitung 11 ein federbelastetes, in Pfeilrichtung öffnendes Uberdruckventil 31 vorgesehen. Die Feder des Überdruckventiles ist auf den betriebsnotwendigen Rückstaudruck eingestellt und gewährleistet beispielsweise eine Oeffnung oberhalb eines Rückstaudruckes von 0,5 Bar.To maintain the operationally necessary back pressure in the high pressure part 4 is a spring-loaded, opening in the direction of the arrow in the return line 11 Pressure relief valve 31 is provided. The spring of the pressure relief valve is on the operationally necessary Back pressure is set and ensures, for example, an opening above a back pressure of 0.5 bar.

Vorteilhaft ist in nicht dargestellter Weise das Uberdruckventil 31 mit dem T-Stück 30 baulich vereinigt. Auf diese Weise können Herstellungskosten sowie Montagezeiten reduziert werden.The pressure relief valve 31 is advantageous in a manner not shown structurally combined with the T-piece 30. In this way, manufacturing costs can be reduced and assembly times can be reduced.

LeerseiteBlank page

Claims (2)

ANSPRUCHE Vorrichtung zur Kraftstoffvorwärmung für Dieselmotoren mit einer eine Temperaturregeleinrichtung aufweisenden elektrischen Heizung, die im Wege des Kraftstoffflusses dem von einer Förderpumpe gespeisten Hochdruckteil der Einspritzpumpe vorgeschaltet.CLAIMS Device for fuel preheating for diesel engines with an electrical heater having a temperature control device, which is in the Paths of fuel flow to the high pressure part of the fed by a feed pump Injection pump connected upstream. ist, wobei der Hochdruckteil eine Rückführleitung für überschüssigen Kraftstoff aufweist (Hauptanmeldung P 30 21 282.9), dadurch gekennzeichnet, daß die Rückführleitung (11) ein in Rückführrichtung öffnendes federbelastetes Uberdruckventil (31) aufweist und endseitig über ein T-Stück (30) in die Ansaugleitung (7) der Förderpumpe (8) mündet. is, wherein the high pressure part is a return line for excess Has fuel (main application P 30 21 282.9), characterized in that the return line (11) is a spring-loaded pressure relief valve that opens in the return direction (31) and at the end via a T-piece (30) into the suction line (7) of the feed pump (8) opens. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Ventil (31) im T-Stück (30) baulich integriert ausgebildet ist.2. Apparatus according to claim 1, characterized in that the valve (31) is structurally integrated in the T-piece (30).
DE19813108668 1980-06-06 1981-03-07 Fuel preheating device Withdrawn DE3108668A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19813108668 DE3108668A1 (en) 1981-03-07 1981-03-07 Fuel preheating device
GB8116959A GB2078298A (en) 1980-06-06 1981-06-03 Heated fuel supply for diesel engines
SE8103563A SE8103563L (en) 1980-06-06 1981-06-05 FUEL PRE-HEATING DEVICE ON DIESEL ENGINES
FR8111237A FR2484023A1 (en) 1980-06-06 1981-06-05 PREFERRED FUEL HEATING DEVICE FOR DIESEL ENGINES
NL8102731A NL8102731A (en) 1980-06-06 1981-06-05 DEVICE FOR PREHEATING FUEL IN DIESEL ENGINES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813108668 DE3108668A1 (en) 1981-03-07 1981-03-07 Fuel preheating device

Publications (1)

Publication Number Publication Date
DE3108668A1 true DE3108668A1 (en) 1982-09-23

Family

ID=6126582

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813108668 Withdrawn DE3108668A1 (en) 1980-06-06 1981-03-07 Fuel preheating device

Country Status (1)

Country Link
DE (1) DE3108668A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307900A1 (en) * 1983-03-05 1984-10-11 Voiculescu, Romeo-Titel, Dipl.-Ing., 2000 Oststeinbek Unit for the preheating of heavy oil
DE19833654A1 (en) * 1998-07-27 2000-02-03 Franz Flach Method for warming diesel fuel for IC engine has additional heating by passing the fuel through a copper coil warmed by the coolant circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307900A1 (en) * 1983-03-05 1984-10-11 Voiculescu, Romeo-Titel, Dipl.-Ing., 2000 Oststeinbek Unit for the preheating of heavy oil
DE19833654A1 (en) * 1998-07-27 2000-02-03 Franz Flach Method for warming diesel fuel for IC engine has additional heating by passing the fuel through a copper coil warmed by the coolant circuit

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