WO2003016704A1 - A method of cooling fuel and a device for implementing the method - Google Patents
A method of cooling fuel and a device for implementing the method Download PDFInfo
- Publication number
- WO2003016704A1 WO2003016704A1 PCT/EP2001/009403 EP0109403W WO03016704A1 WO 2003016704 A1 WO2003016704 A1 WO 2003016704A1 EP 0109403 W EP0109403 W EP 0109403W WO 03016704 A1 WO03016704 A1 WO 03016704A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- channel
- fuel
- cooling
- coolant
- cooling fuel
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
- F28F7/02—Blocks traversed by passages for heat-exchange media
-
- 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
- F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
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- 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
Definitions
- a method of cooling fuel and a device for implementing the method is provided.
- the present invention concerns a method of cooling fuel for a combustion engine, where the fuel is pressurised by means of pressurisation and lead to one or more fuel injection valves.
- the invention also includes a device for implementing said method of cooling fuel.
- the object of the invention is to provide a method of and a device for cooling fuel in a simple and efficient manner, where overheating of the fuel is avoided, and where the use of energy for recycling the fuel is kept at a minimum. Another object is to ensure constant temperature of the fuel where fluctuations are minimised, in order to enhance engine performance.
- the new aspects comprised in the invention are that the fuel between the means of pressurisation and the one or more fuel injection valve (s) is conveyed through at least one first channel, which first channel is in heat transferable contact with at least one separate second channel, in which second channel a coolant is conveyed, and where heat is transferred from the first channel to the second channel.
- the technical effect hereby obtained is that the fuel is cooled and that it is cooled just before entering the engine, whereby it is ensured that the fuel is not overheated and that any unwanted heating effects do not have opportunity to influence the temperature of the fuel before it enters the engine.
- the at least one first channel may comprise at least two outlets of which at least one outlet is connected to an excess-pressure valve, which excess-pressure valve is connected to a fuel tank.
- an excess-pressure valve which excess-pressure valve is connected to a fuel tank.
- the at least one first channel may be placed inside the at least one second channel.
- an advantageous way of transferring heat from the at least one first channel to the at least one second channel is obtained.
- the at least one first channel is insulated from heat radiated from other engine components.
- the at least one second channel may comprise a number of wall sections, which divides the at least one second channel into a number of sub channels. In this way a large contact area between the coolant and the wall sections is obtained, which enhances heat transfer. Also obtained is a way of guiding the flow of the coolant in the at least one second channel, which also can enhance heat transfer enabling a more compact and space saving design.
- the at least one first channel may comprise a num- ber of inwardly directed fins. This feature enhances heat transfer, due to an increased contact area between the fuel and the fins.
- the at least one first channel and the at least one second channel is mainly produced from a single piece of extruded material, whereby a cost saving design is obtained.
- fuel enters the at least one first channel coaxial in one end and exits from the at least two outlets in radial direction, whereby an appro- priate distance between the outlets can be chosen, which distance or distances match corresponding distance or distances between the fuel injection valves.
- the at least one first channel and the at least one second channel are parallel in order to provide a large common contact area between the channels, whereby heat transfer may be improved.
- coolant enters and exits the at least one second channel substantially in the same end, whereby the opposite end can be used for fuel entry only, whereby said opposite end e.g. can be screwed directly on to a fuel pump. It is also obtained that the coolant is easily lead in e.g. parallel hoses to and from the at least one second channel to a separate cooler.
- a further embodiment comprises a device for cooling fuel for a combustion engine, where the fuel is pressurised by means of pressurisation and lead to one or more fuel injection valves, where the device comprises at least one first channel for conveying fuel, which first channel is in heat transferable contact with at least one second channel, in which second channel a coolant is conveyed, and where heat is transferred from the first channel to the second channel.
- the device may further comprise: - at least one inlet for fuel, - at least two outlets for fuel, - at least one inlet for coolant and
- the at least one first channel may be placed inside the at least one second channel. This leads toan advantageous way of transferring heat from the at least one first channel to the at least one second channel. Also obtained is that the at least one first channel is insulated from heat radiated from other engine components.
- the at least one second channel may comprise at least one wall section, said wall section being connected to the outer wall of the at least one first channel, whereby an improved heat transfer from the fuel in contact with the outer wall of the at least one first channel to the cool- ant in the at least one second channel via the said at least one wall section may be obtained.
- At least one wall section is extending between the outer wall of the at least one second channel and the outer wall of the at least one first channel.
- the at least one first channel and the at least one second channel are connected, so that the channels can be extruded in ' one piece and that a connection can be established from the inside of the at least one first channel to the outside of the at least one second channel.
- Fuel may be exited from the at least one first channel to the at least two outlets through passages in the at least one wall section, whereby it is obtained that the passages are tight and separated from the coolant.
- the at least one first channel, the at least one second channel and the at least one wall section are preferably made in one piece by extrusion, whereby handling and production can be done at a relatively low cost.
- Fig. 1 is an embodiment seen in a view from the side and above.
- Fig. 2 is a top view showing 3 sections, D-D, E-E and F-F.
- - Fig. 3 is a sectional view along the line D-D on fig. 2.
- - Fig. 4 is a sectional view along the line E-E on fig. 2.
- Fig. 5 is a sectional view along the line F-F on fig. 2.
- Fig. 1 shows a fuel cooler 20.
- Fuel enters via an inlet for fuel 22 and exits via a number of outlets for fuel 10.
- Coolant enters the fuel cooler 20 via an inlet for coolant 24 and exits via an outlet for coolant 26. Further details are explained in the following.
- Fig. 2 shows the same features as fig. 1. Also shown is 3 sectional views D-D, E-E and F-F.
- D-D is a longitudinal section through the centre of the fuel cooler 20.
- E-E is a longitudinal section through the centre of the outlet for coolant 26.
- F-F is a cross section through the centre of an outlet for fuel 10.
- Fig. 3 shows an inlet for fuel 22 placed in an end cover 34.
- the inlet for fuel 22 is connected to a channel 6. From the channel 6 a number of passages 32, which are placed in a wall section 14, lead to outlets for fuel 10.
- the channel 6 is closed in the end opposite the inlet for fuel 22 with an end cover 36.
- In the end cover 36 are also placed an inlet for coolant 24 and an unshown outlet for coolant 26.
- the end cover 34 comprises a circumferential return opening 33, which use is explained below.
- the fuel cooler is preferably made from a piece of extruded and following machined material with end covers 34 and 36 brazed, glued or welded on to it.
- the means of pressurisation (not shown) are connected to the inlet for fuel 22, whereto fuel is lead under high pressure and further lead to the channel 6.
- the mechanical work to build the pressure creates heat, leading to increased temperatures of the fuel.
- the temperature of the fuel is preferred to be kept constant.
- the fuel is normally used to lubricate the means of pressurisation, e.g. a fuel pump, whereby the temperature must be kept under a certain limit above which the fuel looses its lubricating capacity.
- From the channel 6 the fuel is distributed and exited via the passages 32 to the outlets 10.
- the outlets are connected to fuel injection valves (not shown), from which the fuel is fed to a combustion engine (not shown) .
- one of the outlets for fuel 10 can be connected to the fuel tank via an excess-pressure valve.
- the means of pressurisation is a pump of the type which supplies a fixed flow of fuel. In that case the flow must be higher than the maximum fuel consumption of the engine, whereby, especially when the engine is running idle, a large amount of unused fuel must be e.g. lead to the fuel tank.
- an excess-pressure valve is inserted in the connection between the outlet for fuel 10 and the fuel tank.
- the fuel cooler 20 may be connected directly on a fuel pump, in which case it is advantageous to place the inlet for fuel 22 in one end and to place both inlet and outlet for coolant 24 and 26 in the opposite end. Another possibility is to place at least one of the inlets or outlets for coolant 24 or 26 in radial direction on the fuel cooler. In that case they can be placed in any end.
- Fig. 4 shows an inlet for fuel 22 and a first channel 6 encircled by an outer wall 28.
- a second channel 8 in which coolant is lead.
- the second channel 8 is divided into two separate sub channels 16, so that coolant can be lead longitudinally from one end to the other, and returned in the op- posite direction, thereby entering and exiting in the same end.
- the second channel 8 is encircled by an outer wall 30. End covers 34 and 36 are attached among others to the outer wall 30.
- the second channel 8 is divided into two sub channels 16 by the wall sections 14, which extends between the end covers 34 and 36.
- the wall sections 14 extend between the outer wall 28 of the first channel 6 and the outer wall 30 of the second channel 8.
- Coolant enters via an inlet 24 and flows to the opposite end, where it is stopped and returned to an outlet for coolant 26.
- a separation wall 37 which separates the flows through the inlet 24 and the outlet 26.
- the separation wall forms a tight connection to the wall sections 14.
- the end cover 36 can comprise a distribution opening 35 in case of multiple sub channels 16, see e.g. fig. 5. This is to couple multiple sub channels 16 to one inlet 24 respective one outlet 26.
- the end cover 34 comprises a return opening, which allows coolant forwarded in sub channels 16 connected to the inlet 26 to be returned via other sub chan- nels 16 connected to the outlet 26, whereby a circuit is formed.
- the coolant could be lead into the channel 8 in one end and exited in the opposite end, e.g. in radial direction.
- the coolant After leaving the fuel cooler, the coolant is lead to a separate cooling unit, cooled to suitable temperature, and recycled to the fuel cooler.
- a separate cooling unit cooled to suitable temperature, and recycled to the fuel cooler.
- the fuel cooler may also be used to heat the fuel. This may be done e.g. by inserting an electrical heating element into the fuel cooler, which is then activated when needed. The temperature of the fuel should then be monitored with a temperature gauge.
- Fig. 5 shows a first channel 6 for fuel, which in this case is also placed in the centre as the example in fig. 3 and 4, but could as well be placed off centre.
- the channel 6 is encircled by an outer wall 28.
- On the inside of the outer wall 28 a number of inwardly extending fins 18 are placed. The purpose of the fins 18 is to provide an enlarged internal surface area, whereby heat transfer from the fuel is enhanced.
- the outer wall 28 is connected to a number of wall sections 14, which extend outwardly to an outer wall 30. Between the outer walls 28 and 30 a second channel 8 for coolant is formed, which channel is subdivided into a number of sub channels 16. Increasing the number of wall sections 14 increases the surface area, which improves heat transfer to the coolant.
- Heat is transferred from the fuel to the fins 18 - to the outer wall 28 - to the wall sections 14 and to the outer wall 30, where it is transferred to the coolant via the surfaces in contact with the coolant.
- Coolant enter via an inlet 24 and exits via an outlet 26.
- the forward flow is distributed via a distribution opening 35.1 to the sub channels 16 in the left part, and is separated from the return flow in the right part to an accumulating opening 35.2 by a separation wall section 37. Both openings 35.1 and 35.2 are placed in the end cover 36.
- One of the wall sections 14 is preferably made with a thickness adequate to provide passages 32 from the first channel 6 to the outlet 10 as well as adequate wall thickness for e.g.
- a treading in the outlet 10 where a connection is to be made to the fuel injection valves and/or excess-pressure valve.
- the shown embodiment is well suited for an extrusion process after which the passages 32 and outlets 10 are machined, e.g. by drilling.
- the fuel cooler and its components can be made from a number of materials or combinations of materials, e.g. aluminium, steel alloy, brass, magnesium, titanium, and may be assembled by welding, brazing, clad brazing, glu- ing etc. as appropriate.
- the coolant may e.g. be of the same type as used for cooling the engine.
- the fuel may be of any type e.g. diesel, gasoline, kerosene etc.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2001/009403 WO2003016704A1 (en) | 2001-08-13 | 2001-08-13 | A method of cooling fuel and a device for implementing the method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2001/009403 WO2003016704A1 (en) | 2001-08-13 | 2001-08-13 | A method of cooling fuel and a device for implementing the method |
Publications (1)
Publication Number | Publication Date |
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WO2003016704A1 true WO2003016704A1 (en) | 2003-02-27 |
Family
ID=8164548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/009403 WO2003016704A1 (en) | 2001-08-13 | 2001-08-13 | A method of cooling fuel and a device for implementing the method |
Country Status (1)
Country | Link |
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WO (1) | WO2003016704A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2201504A (en) * | 1986-12-20 | 1988-09-01 | Wieland Werke Ag | Fuel cooler |
DE3735915A1 (en) * | 1987-10-23 | 1989-05-03 | Wieland Werke Ag | Heat exchanger |
US5251603A (en) * | 1991-05-29 | 1993-10-12 | Sanoh Kogyo Kabushiki Kaisha | Fuel cooling system for motorvehicles |
JPH08100717A (en) * | 1994-09-30 | 1996-04-16 | Tsuchiya Mfg Co Ltd | Cooling device for fluid conveying pipe |
DE29722841U1 (en) * | 1997-12-24 | 1998-02-12 | Sander Kg Gmbh & Co | Cooler for diesel oil flowing back from the injection pump or injector |
EP0985894A2 (en) * | 1998-09-08 | 2000-03-15 | Witzenmann GmbH Metallschlauch-Fabrik Pforzheim | Fuel cooler |
US6269804B1 (en) * | 2000-04-26 | 2001-08-07 | Delphi Technologies, Inc. | Coaxial liquid cooled fuel rail assembly |
-
2001
- 2001-08-13 WO PCT/EP2001/009403 patent/WO2003016704A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2201504A (en) * | 1986-12-20 | 1988-09-01 | Wieland Werke Ag | Fuel cooler |
DE3735915A1 (en) * | 1987-10-23 | 1989-05-03 | Wieland Werke Ag | Heat exchanger |
US5251603A (en) * | 1991-05-29 | 1993-10-12 | Sanoh Kogyo Kabushiki Kaisha | Fuel cooling system for motorvehicles |
JPH08100717A (en) * | 1994-09-30 | 1996-04-16 | Tsuchiya Mfg Co Ltd | Cooling device for fluid conveying pipe |
DE29722841U1 (en) * | 1997-12-24 | 1998-02-12 | Sander Kg Gmbh & Co | Cooler for diesel oil flowing back from the injection pump or injector |
EP0985894A2 (en) * | 1998-09-08 | 2000-03-15 | Witzenmann GmbH Metallschlauch-Fabrik Pforzheim | Fuel cooler |
US6269804B1 (en) * | 2000-04-26 | 2001-08-07 | Delphi Technologies, Inc. | Coaxial liquid cooled fuel rail assembly |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 08 30 August 1996 (1996-08-30) * |
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