DE4112495C1 - Water-cooled IC engine fuel preheating - has fuel duct integrated in outer crankcase wall, bounding cooling water jacket - Google Patents

Water-cooled IC engine fuel preheating - has fuel duct integrated in outer crankcase wall, bounding cooling water jacket

Info

Publication number
DE4112495C1
DE4112495C1 DE4112495A DE4112495A DE4112495C1 DE 4112495 C1 DE4112495 C1 DE 4112495C1 DE 4112495 A DE4112495 A DE 4112495A DE 4112495 A DE4112495 A DE 4112495A DE 4112495 C1 DE4112495 C1 DE 4112495C1
Authority
DE
Germany
Prior art keywords
fuel
cooling water
cooled
internal combustion
bounding
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
DE4112495A
Other languages
German (de)
Inventor
Klaus-Peter Dipl.-Ing. Ahmann (Fh), 7053 Kernen, De
Walter 7012 Fellbach De Kerschbaum
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.)
Mercedes Benz Group AG
Original Assignee
Mercedes Benz 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 Mercedes Benz AG filed Critical Mercedes Benz AG
Priority to DE4112495A priority Critical patent/DE4112495C1/en
Application granted granted Critical
Publication of DE4112495C1 publication Critical patent/DE4112495C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/007—Adaptations for cooling
    • 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
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/10—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot liquids, e.g. lubricants or cooling water
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/10—Fuel manifold
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The fuel preheating uses a fuel duct in the cooling jacket of the crankcase. In the case of a watercooled engine, the fuel duct is integrated in a housing wall (5) forming the external limit of the coolant jacket (1). Pref. the wall has a section (5b) acting as a partition and thus forming the fuel duct (4) and a separate coolant flow duct (3). A single duct, extending over the entire cylinder bank, may be used. USE/ADVANTAGE - For i.c. engines, with rapid fuel heating, without overheating.

Description

Die Erfindung betrifft eine Kraftstoffvorwärmung für eine Brennkraftmaschine nach den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to fuel preheating for a Internal combustion engine according to the preamble of the claim 1 specified characteristics.

Eine Kraftstoffvorwärmung ist aus der DE-PS 4 51 769 bekannt. Bei der hier beschriebenen schnellaufenden Brennkraftmaschine mit Luftkühlung wird Kraftstoff vor Eintritt in den Brennraum durch in dem Kühlmantel des Zylinderkurbelgehäuses verlaufende Kraftstoffkanäle geführt, um durch die Wärme der Zylinderwan­ dung den Kraftstoff zu erwärmen, und erst dann in die im Zylinderinnern hochverdichtete Luft eingespritzt.Fuel preheating is known from DE-PS 4 51 769. In the high-speed internal combustion engine described here Air cooling turns fuel into fuel before entering the combustion chamber by running in the cooling jacket of the cylinder crankcase Fuel channels run through the heat of the cylinder wall to heat the fuel, and only then in the im Highly compressed air is injected inside the cylinder.

Bei dieser Ausführung ist die Gefahr nicht auszuschließen, daß sich bei bestimmten Betriebszuständen der Brennkraftmaschine der in den Kanälen strömende Kraftstoff zu stark erhitzt und dort zur Selbstzündung führt.With this version the risk cannot be excluded that themselves in certain operating states of the internal combustion engine the fuel flowing in the channels heats up too much and there leads to self-ignition.

Ferner ist aus der DE 35 38 360 C1 eine Kraftstoffvorwärmung für eine Brennkraftmaschine bekannt, bei der bei niedrigen Kraftstofftemperaturen angesaugter Kraftstoff über einen zwi­ schen Kraftstoffbehälter und Brennkraftmaschine liegenden Kühlwasser-Kraftstoff-Wärmetauscher strömt, um die bei tiefen Umgebungstemperaturen häufig durch Paraffinausscheidungen im Kraftstoff auftretenden Betriebsstörungen zu vermeiden.Furthermore, DE 35 38 360 C1 preheats fuel known for an internal combustion engine at low Fuel temperatures sucked fuel over a zwi fuel tank and internal combustion engine Cooling water fuel heat exchanger flows to the deep Ambient temperatures often caused by paraffin deposits in the Avoid fuel malfunctions.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Brenn­ kraftmaschine mit einer für die Kraftstoffdurchströmung vorge­ sehenen Kanalanordnung im Zylinderkurbelgehäuse eine Kraftstoffvorwärmung vorzusehen, durch die eine schnell an­ sprechende Erwärmung des Kraftstoffes ohne Überhitzungsgefahren des Kraftstoffes sichergestellt ist.The invention has for its object in a burning Engine with a pre-for the fuel flow see channel arrangement in the cylinder crankcase Provide fuel preheating by which a quick start Talking heating of the fuel without risk of overheating of the fuel is ensured.

Zur Lösung der Aufgabe dienen erfindungsgemäß die im Kennzei­ chen des Patentanspruchs 1 angegebenen Merkmale.According to the invention serve to solve the problem in the Kennzei chen of claim 1 specified features.

Durch die besondere Kanalanordnung wird eine Überhitzung des Kraftstoffes vermieden, da beim Wärmeaustausch die Kraftstoff­ temperatur höchstens an die Temperatur des Kühlwassers heran­ reicht.Due to the special channel arrangement, overheating of the Avoided fuel because the fuel is used for heat exchange temperature at most to the temperature of the cooling water enough.

Durch die besondere Kanalanordnung entfallen die sonst üblichen langen freiliegenden Kraftstoffleitungen, ebenso die bei ex­ ternem Kühlwasser-Kraftstoff-Wärmetauscher notwendigen Abdich­ tungen. Außerdem ergibt sich der Vorteil einer schnellen Kraftstofferwärmung.The special channel arrangement eliminates the usual requirements long exposed fuel lines, as well as the ex ternem cooling water-fuel heat exchanger necessary sealing exercises. There is also the advantage of a fast Fuel heating.

In den Unteransprüchen sind noch förderliche Weiterbildungen der Erfindung angegeben.In the subclaims there are still further training opportunities specified the invention.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und im folgenden näher beschrieben.An embodiment of the invention is in the drawing shown and described in more detail below.

Eine wassergekühlte Brennkraftmaschine weist im Kühlmantel 1 ihres Zylinderkurbelgehäuses 2 neben einem Kühlwasserkanal 3 auch einen Kraftstoffkanal 4 auf, der in der außenliegenden Gehäusewand 5 des Kühlmantels 1 integriert und von einem Ge­ häuseaußenwandabschnitt 5a und Gehäuseinnenwandabschnitt 5b begrenzt ist, von denen letzterer zugleich Trennwand zwischen Kraftstoff und Kühlwasser ist. Mit 6 ist die Zylinderwand des nicht näher dargestellten hubausführenden Kolbens bezeichnet.A water-cooled internal combustion engine has in the cooling jacket 1 of its cylinder crankcase 2 in addition to a cooling water channel 3 and a fuel channel 4 , which is integrated in the outer housing wall 5 of the cooling jacket 1 and is limited by a Ge housing outer wall section 5 a and housing inner wall section 5 b, the latter at the same time partition between Is fuel and cooling water. With 6 the cylinder wall of the piston, not shown, is shown.

Der Kraftstoffkanal 4 ist in der Gehäusewand 5 eingegossen, er kann aber auch spanend, z. B. durch Bohren, hergestellt werden.The fuel channel 4 is cast into the housing wall 5 , but it can also be machined, e.g. B. by drilling.

Bei mehrzylindrigen Brennkraftmaschinen erstreckt sich der Kraftstoffkanal 4 über die gesamte Zylinderreihe, und zwar parallel zu den Kühlwasserkanälen. Gegebenenfalls können auch mehrere Kraftstoffkanäle im Kühlmantel 1 vorgesehen sein, von denen einer oder mehrere dem Zylinderkurbelgehäuse 2 optimal angepaßt sein können.In the case of multi-cylinder internal combustion engines, the fuel channel 4 extends over the entire row of cylinders, specifically parallel to the cooling water channels. Optionally, several fuel channels can be provided in the cooling jacket 1 , one or more of which can be optimally adapted to the cylinder crankcase 2 .

Mit 7 ist noch eine in den Kraftstoffkanal 4 mündende Bohrung als Kraftstoffein- oder -auslaß bezeichnet. 7 with an opening into the fuel passage hole 4 is still referred to as Kraftstoffein- or outlet.

Ein Wärmeaustausch muß nicht nur über den Gehäuseinnenwandab­ schnitt 5b stattfinden, er kann auch über die gesamte außen­ liegende Gehäusewand 5 erfolgen.A heat exchange does not cut only about 5 Gehäuseinnenwandab held b, it can also take place over the entire outer housing wall. 5

Der zu erwärmende Kraftstoff fließt entweder ständig oder weg­ gesteuert durch den oder die Kraftstoffkanäle 4. Die Steuerung kann dabei mechanischer, elektrischer, hydraulischer oder pneumatischer Art oder durch entsprechende Kombination dieser Möglichkeiten erfolgen, wobei sich der Einfachheit halber Thermostatsteuerungen anbieten.The fuel to be heated flows either continuously or in a controlled manner through the fuel channel or channels 4 . The control can take place mechanically, electrically, hydraulically or pneumatically or by a corresponding combination of these possibilities, thermostatic controls being offered for the sake of simplicity.

Claims (3)

1. Kraftstoffvorwärmung für eine Brennkraftmaschine mit einem einen Kühlmantel aufweisenden Zylinderkurbelgehäuse mit einer Kanalanordnung für die Kraftstoffdurchströmung, dadurch gekennzeichnet, daß bei einer wassergekühlten Brennkraftmaschine die Kanalan­ ordnung in einer den vom Kühlwasser durchströmten Kühlmantel (1) nach außen begrenzenden Gehäusewand (5) integriert ist.1. Fuel preheating for an internal combustion engine with a cooling jacket having a cylinder crankcase with a channel arrangement for the fuel flow, characterized in that in a water-cooled internal combustion engine, the channel arrangement is integrated in a cooling jacket ( 1 ) through which the cooling water flows outwards and limits the housing wall ( 5 ). 2. Kraftstoffvorwärmung nach Anspruch 1, dadurch gekennzeichnet, daß die den Kühlmantel (1) nach außen begrenzende Gehäusewand (5) zur Bildung der Kanalanordnung einen den Kraftstoff und das Kühlwasser trennenden Gehäuseinnenwandabschnitt (5b) als Trennwand aufweist.2. Fuel preheating according to claim 1, characterized in that the cooling jacket ( 1 ) outwardly delimiting housing wall ( 5 ) to form the channel arrangement has a fuel and the cooling water separating housing inner wall section ( 5 b) as a partition. 3. Kraftstoffvorwärmung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß bei einer mehrzylindrigen Brennkraftmaschine die Kanalan­ ordnung aus mindestens einem sich zumindest annähernd über die gesamte Zylinderreihe erstreckenden Kraftstoffkanal (4) be­ steht.3. Fuel preheating according to claim 1 or 2, characterized in that in a multi-cylinder internal combustion engine, the Kanalan arrangement consists of at least one fuel channel ( 4 ) extending at least approximately over the entire row of cylinders.
DE4112495A 1991-04-17 1991-04-17 Water-cooled IC engine fuel preheating - has fuel duct integrated in outer crankcase wall, bounding cooling water jacket Expired - Lifetime DE4112495C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4112495A DE4112495C1 (en) 1991-04-17 1991-04-17 Water-cooled IC engine fuel preheating - has fuel duct integrated in outer crankcase wall, bounding cooling water jacket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4112495A DE4112495C1 (en) 1991-04-17 1991-04-17 Water-cooled IC engine fuel preheating - has fuel duct integrated in outer crankcase wall, bounding cooling water jacket

Publications (1)

Publication Number Publication Date
DE4112495C1 true DE4112495C1 (en) 1992-06-04

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DE4112495A Expired - Lifetime DE4112495C1 (en) 1991-04-17 1991-04-17 Water-cooled IC engine fuel preheating - has fuel duct integrated in outer crankcase wall, bounding cooling water jacket

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10325329A1 (en) * 2003-06-04 2005-01-13 Fischer, Johann Fuel filter for fuel injection systems of motor vehicles is heated by engine cooling water to heat fuel and prevent clogging when used with Diesel and vegetable oil fuels

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE451769C (en) * 1927-11-01 Adolf Schnuerle Dr Ing Fuel supply in high-speed oil engines with self-ignition of the fuel in the highly compressed air
DE464032C (en) * 1924-09-23 1928-08-08 Otto Beyer Mixture-compressing internal combustion engine with preheating of air, fuel and mixture on the cylinder jacket

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE451769C (en) * 1927-11-01 Adolf Schnuerle Dr Ing Fuel supply in high-speed oil engines with self-ignition of the fuel in the highly compressed air
DE464032C (en) * 1924-09-23 1928-08-08 Otto Beyer Mixture-compressing internal combustion engine with preheating of air, fuel and mixture on the cylinder jacket

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10325329A1 (en) * 2003-06-04 2005-01-13 Fischer, Johann Fuel filter for fuel injection systems of motor vehicles is heated by engine cooling water to heat fuel and prevent clogging when used with Diesel and vegetable oil fuels

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: DAIMLER-BENZ AKTIENGESELLSCHAFT, 70567 STUTTGART,

8327 Change in the person/name/address of the patent owner

Owner name: DAIMLERCHRYSLER AG, 70567 STUTTGART, DE

8339 Ceased/non-payment of the annual fee