CA2057331A1 - Engine fuel heating and oil filtration apparatus - Google Patents
Engine fuel heating and oil filtration apparatusInfo
- Publication number
- CA2057331A1 CA2057331A1 CA002057331A CA2057331A CA2057331A1 CA 2057331 A1 CA2057331 A1 CA 2057331A1 CA 002057331 A CA002057331 A CA 002057331A CA 2057331 A CA2057331 A CA 2057331A CA 2057331 A1 CA2057331 A1 CA 2057331A1
- Authority
- CA
- Canada
- Prior art keywords
- fuel
- engine
- heated
- container
- oil
- 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.)
- Abandoned
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 94
- 238000010438 heat treatment Methods 0.000 title claims description 14
- 238000001914 filtration Methods 0.000 title description 3
- 239000003921 oil Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 239000010705 motor oil Substances 0.000 abstract 1
- 239000002283 diesel fuel Substances 0.000 description 2
- 235000003642 hunger Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/18—Heating or cooling the filters
-
- 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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
-
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Agnet's Ref: P00263 ABSTRACT
Fuel for a Diesel engine is passed through a coiled heat exchanger 13 disposed about a compartment 6 containing a filter for hot engine oil. The fuel is heated thereby to a predetermined level and the oil is cooled. A thermostat (Figure 3) is present to ensure that the fuel does not overheat and is arranged to add unheated fuel to the heated fuel when necessary.
LS/BW/27.11.91
Fuel for a Diesel engine is passed through a coiled heat exchanger 13 disposed about a compartment 6 containing a filter for hot engine oil. The fuel is heated thereby to a predetermined level and the oil is cooled. A thermostat (Figure 3) is present to ensure that the fuel does not overheat and is arranged to add unheated fuel to the heated fuel when necessary.
LS/BW/27.11.91
Description
2 ~ 3 ~
ENGI~E FUEL HEATING A~D OIL FI:LTRATION APPARATUS
The invention relates to apparatus for use in heating fuel prior to its ignition in an engine, especially a Diesel engine or compression engine, and to -the simultarleous filtration of the oil used to lubricate the engine.
It is known to pre-hea-t Diesel fuel prior its ignition into order to reduce fuel consumption. Known apparatus or methods used are either unreliable or do not heat the fuel in a controlled way.
For example, the heating devices affect the performance of the engine by starving it of fuel from time to time or they are so inefficient that more than one heating means is required or they are so uncontrolled that they cannot be used in hot climates. It is one object of the invention to provide reliable and efficient and controlled apparatus and method for the purpose specified.
Accordingly in one aspect the invention provides an engine fuel heating apparatus comprising a container having an inlet for the ingress of hot lubrication oil from the engine and an outlet for the egress of oil back to the engine, heat exchanger means located within the container and arranged, in use, to be substantially immersed within the hot oil flowing between the inlet and outlet of the container, the heat exchanger means having an inlet for the ingress of fuel from a reservoir thereof and an outlet for the egress of heated fuel to the engine, and ~7~ ~
being arranged to pass the fuel to the engine as demanded, a body of filter material being located within the container and arranged so that the oil flowing between the inlet and outlet passes through the body of fil-ter material and is thereby filtered free of contaminants.
Apparatus of the invention can be provided as a single unit capable of simultaneously performing two different tasks.
In a more specific aspect, the invention provides a container having a compartment, the compartment having an open top and a closed floor, an oil filter element being contained within the compartment, an inlet being present in the floor of the container for the ingress of hot lubricating oil from an engine, an oil outlet comprising a pipe extending from a hole in the floor of the compartment to the outside of the container, elongate heat exchanger means comprising a length of tubing coiled about the compartment and including an inlet for the ingress of fuel from a reservoir thereof, and an outlet for the egress of fuel to the combustion chamber of the engine, the tubing being dimensioned so as not to substantially restrict the flow of fuel to the engine, whereby, in use, hot oil is passed into the inlet of the container through the filter element in the compartment and out through the oil outlet and fuel is passed along the heat exchanger from the inlet to the engine and the flowing fuel is continuously heated and the oil is continuously filtered.
Preferably the heat exchanger means comprises a coil or like length of tube. The diameter of the tube is selected so that the rate of flow of fuel -to the engine is in excess of any engine demand requirements. The length of the tube is determined by the intended level of heating of the fuel and related factors.
The filter material may be a Nylon gauze or paper or a mixture.
Preferably the filter material comprises a microporous sheet of resin bonded cellulosic fibres derived from sulphated wood pulp;
more specifically the filter material is a pulped mixture of sulphated hard wood and soft wood Krafts. The fibres are split and then resin bonded to form sheets in which the majority of fibres are oriented in one direction, the sheets are then dried and creped. Preferably the sheet has pores of 5 to 100 microns diameter.
The fuel and the oil may be arranged to flow in the same direction or in opposite directions.
It is a surprising feature of the invention that because the heating of the fuel is so efficient there is a serious risk that the fuel will be heated to a temperature above that at which the fuel will be harmed chemically, e.g. by degradation. According to another feature of the invention thermostat control means are present to reduce the temperature below a predetermined limit, ~ g~
typically about 45C in the case of Diesel fuel. Preferably such means are arranged to add relatively cold fuel from the fuel tank to the hot fuel in sufficient quantity to reduce the temperature as required.
In a much preferred feature, the apparatus as defined further includes thermostat means located in the main pipeline present between the container and the engine where the fuel is consumed, the thermostat including a temperature sensing device connected to a piston which at rest obstructs an inlet from an auxiliary pipeline connected to a supply of unheated fuel, the piston being arranged to reciprocate between two longitudinally spaced apart perforate walls through which fuel flows towards the engine, the piston and the device being spring biased towards the forward perforate wall proximate the engine, the thermostat being arranged that when the device senses a temperature above a predetermined limit, the piston is urged rearwardly to expose the inlet and allow cooler fuel into the main pipeline thereby to mix with the fuel therein and so lower the temperature thereof. The piston means which obstructs the inlet from the auxiliary pipeline is arranged so that it does not obstruct the flow of fuel to the engine. For this purpose the piston has elongate passageways therethrough.
In another aspect the invention provides a method of heating fuel for an engine prior to passing the fuel into the engine, 2~733~
comprising passing the fuel from a reservolr thereof into an inlet of a heat exchanger means, the hea-t exchanger means being subs-tantially immersed within hot oil flowing from the engine and through a container within which the heat exchanger means is located, and passing the fuel thereby heated into the combustion chamber of the engine.
Preferably the method includes the step of maintaining the temperature below a predetermined value.
In order that the invention may be well understood, embodiments thereof will now be described by way of example with reference to the accompanying diagrammatic drawings in which;
Figure 1 is a vertical sectional view through one embodiment of the invention;
Figure 2 is a cross sectional view along line A-A of Figure l;
Figure 3 is a schematic diagram showing another embodiment of the invention; and Figure 4 is a longitudinal sectional view through the thermostat of the embodiment shown in Figure 3.
~733~
The same reference numerals are used to iclentify similar parts in the different embodiments.
The apparatus shown in Figures 1 and 2 of the drawings comprises an outermost generally cylindrical container or canister 1 having a lid closure 2 which, as shown, may be sealed to the canister 1 by means of screw threads 3 or other sealing means. The interior of the canister 1 defines a chamber 4. An inlet 5 is present in the base of the canister 1 as shown and is arranged, in use, to be connected to an outlet from the oil lubrication system of a Diesel engine (not shown). A generally cylindrical compartment 6 is located centrally within the canister 1 and standing on a pillar 17. The canister and compartment 6 may advantageously be constructed of stainless steel sheet welded or otherwise joined together. The compartment 6 is open at the top to define an entrance 7 and contains as a close fit a body of filter material 8, e.g. of cellulosic fibres, paper or the like. A short length of pipe 9 extends between a hole 10 in the floor 11 of the compartment 6 and an oil outlet 12 in the floor of the canister.
A heat exchanger 13 having an inlet 14 connectable to a fuel reservoir (not shown), and an outlet 15 connectable to the combustion chambers of an associated engine (not shown), is located within the chamber 4. The engine may be a Diesel engine having a high fuel demand. As shown, the heat exchanger 13 comprises a length of tubing, e.g. of copper or like thermally 7 ~ ~ L
conductive material slightly spaced from and coiled several times about the compartrnent 6. The outlet 15 is diametrically opposite and vertically above the inlet 14. The diameter of the tubing is large enough not to affect the rate of flow of fuel to the engine and the length is selected according to the level of heating required.
In use, lubrication oil heated by passage through the engine lubrication system is pumped under pressure or drawn under vacuum from the engine through the inlet 5 to fill the chamber 4 sufficiently to immerse the heat exchanger 13 in the hot oil.
The oil flows continuously in the annular space 16 between the walls of the compartment 6 and the canister 1, through the entrance 7 of the compartment 6 and down through the body of filter material 8, where particles of carbon or metal or water and other harmful materials are removed. The filtered oil then returns via the hole 10 in the floor 11 of the compartment 6 and the pipe 9 to the engine. Meanwhile, fuel is pumped from the reservoir and into the inlet 14 of the heat exchanger coil 13.
During passage through the heat exchanger 13, heat is transferred from the hot flowing oil to the relatively cooler fuel. The fuel then passes under pressure through the outlet 15 and into the combustion chambers of the engine. It will be noted that the oil flows vertically up into the chamber 4 and then down to the outlet 12 through the filter whereas the fuel ~lows spirally in heat exchanger coils 13. The two fluids thus flow in different 2~33:~
directions, i.e. transversely, for efficien-t heat exchange. We nave discovered that with oil sirculating at a temperature of about 90C, it is possible to heat the fuel to a -temperature of about 40-50C or more. At such a temperature useful reductions in fuel consumption and other benefits can be achieved. Using such a system, the fuel flow is not substan-tially restricted thereby avoiding fuel starvation.
Periodically, the body of filter material will become clogged and can be replaced by removing the closure 2 and substituting a new fil'cer for the old filter in the compartment 6.
An adaptor may be present on the inlet to the heat exchanger to adjust the flow rate for different engine sizes.
As shown in Figure 3, a thermostat T may be incorporated in circuit with the apparatus. As shown the thermostat is located at the outlet pipe 15 leading from the apparatus to the fuel injectors of the engine. The thermostat T comprises a length of piping 20 interposed in the main pipeline between the outlet 15 of the apparatus of Figures 1 and 2 and the fuel injectors, not shown. At each end the length is connected by a nut 21 to the adjacent threaded ends of the main pipeline 22. The pipe 20 contains a passageway 23. The length has an inlet port 24 in one side wall connected to an auxiliary pipeline 25 to the main fuel reservoir. The pipeline 25 will typically be much shorter than 2~3~33~
the length of the heat exchanger coil 13.
A piston 26 having elongate passageways 27 is present in the passageway 23 which includes a forward shoulder 28 to limit its forward travel. The piston 26 is urged forward by a spring 29 biased between a rearward per,orate wall 30 and the rearward face 31 of the piston 26. A forward perforate wall 32 is present in the passageway 23 and has a central socket 33 to receive t'ne body of a thermostat sensor 34. The sensor 34 has a rearwardly extending push rod 35 opposite the forward face 36 of t'ne piston 26. 0 rings 37 are present a-t each end of the length. At rest, the body of the sensor body 34 is in the socket 33 in the forward perforate wall 32, with the piston 26 adjacent thereto and obstructing the inlet port 24. Heated fuel flows forwardly through the rearward perforate wall 30 through the passageways 27 of the piston 26 and through the holes of the forward perforate wall 32 about the sensor body 34. When the temperature of the heated fuel rises above a predetermined limit, say about 45C, the sensor 34 is actuated and the push rod 35 urges the piston 26 rearwardly exposing the inlet 24 according to the distance travelled by the piston 26. Unheated fuel can then flow forwardly from the auxiliary pipeline 25 to join the heated fuel disposed about the sensor 34, the two fuels being mixed on their passage through the holes in the forward perforate wall 32. When the temperature falls below the predetermined limit the sensor retracts and the spring 29 urges the piston 26 forward to ~3~73~
obstruct the port 24 again. The partC; may be dimensioned so that the unheated fuel will be drawn through the pi2e 25, without affecting the flow of the heated fuel.
The apparatus may be provided as a separate accessory, or, for exarnple, the container 1 may be integrally cast into the engine block. Two or more units may be linked together in series to suit engines of larger si~es. The thermostat may be interposed between the fuel outlet pipe and the fuel injectors as shown, or it may be associated with the oil circuit. The apparatus may be used with a petrol engine with appropriate modifications.
Because the fuel is preheated in a controlled way, i.e. to a predetermined temperature range, the fuel is consumed efficiently with much reduced pollution. In evaluations, we have been able to show a saving in fuel cost of up to 15% and the following reductions in exhaust emissions:
CO from 60 to 30 ppm and from 50 to 20 ppm NOX from 10 to 4 ppm and from 12 to 5 ppm HCHO down to 0.6 ppm The oil filtration acts to remove all particles larger than 2 micron. Calculations have shown that the distance travelled between oil changes can be extended to 100,000 km.
ENGI~E FUEL HEATING A~D OIL FI:LTRATION APPARATUS
The invention relates to apparatus for use in heating fuel prior to its ignition in an engine, especially a Diesel engine or compression engine, and to -the simultarleous filtration of the oil used to lubricate the engine.
It is known to pre-hea-t Diesel fuel prior its ignition into order to reduce fuel consumption. Known apparatus or methods used are either unreliable or do not heat the fuel in a controlled way.
For example, the heating devices affect the performance of the engine by starving it of fuel from time to time or they are so inefficient that more than one heating means is required or they are so uncontrolled that they cannot be used in hot climates. It is one object of the invention to provide reliable and efficient and controlled apparatus and method for the purpose specified.
Accordingly in one aspect the invention provides an engine fuel heating apparatus comprising a container having an inlet for the ingress of hot lubrication oil from the engine and an outlet for the egress of oil back to the engine, heat exchanger means located within the container and arranged, in use, to be substantially immersed within the hot oil flowing between the inlet and outlet of the container, the heat exchanger means having an inlet for the ingress of fuel from a reservoir thereof and an outlet for the egress of heated fuel to the engine, and ~7~ ~
being arranged to pass the fuel to the engine as demanded, a body of filter material being located within the container and arranged so that the oil flowing between the inlet and outlet passes through the body of fil-ter material and is thereby filtered free of contaminants.
Apparatus of the invention can be provided as a single unit capable of simultaneously performing two different tasks.
In a more specific aspect, the invention provides a container having a compartment, the compartment having an open top and a closed floor, an oil filter element being contained within the compartment, an inlet being present in the floor of the container for the ingress of hot lubricating oil from an engine, an oil outlet comprising a pipe extending from a hole in the floor of the compartment to the outside of the container, elongate heat exchanger means comprising a length of tubing coiled about the compartment and including an inlet for the ingress of fuel from a reservoir thereof, and an outlet for the egress of fuel to the combustion chamber of the engine, the tubing being dimensioned so as not to substantially restrict the flow of fuel to the engine, whereby, in use, hot oil is passed into the inlet of the container through the filter element in the compartment and out through the oil outlet and fuel is passed along the heat exchanger from the inlet to the engine and the flowing fuel is continuously heated and the oil is continuously filtered.
Preferably the heat exchanger means comprises a coil or like length of tube. The diameter of the tube is selected so that the rate of flow of fuel -to the engine is in excess of any engine demand requirements. The length of the tube is determined by the intended level of heating of the fuel and related factors.
The filter material may be a Nylon gauze or paper or a mixture.
Preferably the filter material comprises a microporous sheet of resin bonded cellulosic fibres derived from sulphated wood pulp;
more specifically the filter material is a pulped mixture of sulphated hard wood and soft wood Krafts. The fibres are split and then resin bonded to form sheets in which the majority of fibres are oriented in one direction, the sheets are then dried and creped. Preferably the sheet has pores of 5 to 100 microns diameter.
The fuel and the oil may be arranged to flow in the same direction or in opposite directions.
It is a surprising feature of the invention that because the heating of the fuel is so efficient there is a serious risk that the fuel will be heated to a temperature above that at which the fuel will be harmed chemically, e.g. by degradation. According to another feature of the invention thermostat control means are present to reduce the temperature below a predetermined limit, ~ g~
typically about 45C in the case of Diesel fuel. Preferably such means are arranged to add relatively cold fuel from the fuel tank to the hot fuel in sufficient quantity to reduce the temperature as required.
In a much preferred feature, the apparatus as defined further includes thermostat means located in the main pipeline present between the container and the engine where the fuel is consumed, the thermostat including a temperature sensing device connected to a piston which at rest obstructs an inlet from an auxiliary pipeline connected to a supply of unheated fuel, the piston being arranged to reciprocate between two longitudinally spaced apart perforate walls through which fuel flows towards the engine, the piston and the device being spring biased towards the forward perforate wall proximate the engine, the thermostat being arranged that when the device senses a temperature above a predetermined limit, the piston is urged rearwardly to expose the inlet and allow cooler fuel into the main pipeline thereby to mix with the fuel therein and so lower the temperature thereof. The piston means which obstructs the inlet from the auxiliary pipeline is arranged so that it does not obstruct the flow of fuel to the engine. For this purpose the piston has elongate passageways therethrough.
In another aspect the invention provides a method of heating fuel for an engine prior to passing the fuel into the engine, 2~733~
comprising passing the fuel from a reservolr thereof into an inlet of a heat exchanger means, the hea-t exchanger means being subs-tantially immersed within hot oil flowing from the engine and through a container within which the heat exchanger means is located, and passing the fuel thereby heated into the combustion chamber of the engine.
Preferably the method includes the step of maintaining the temperature below a predetermined value.
In order that the invention may be well understood, embodiments thereof will now be described by way of example with reference to the accompanying diagrammatic drawings in which;
Figure 1 is a vertical sectional view through one embodiment of the invention;
Figure 2 is a cross sectional view along line A-A of Figure l;
Figure 3 is a schematic diagram showing another embodiment of the invention; and Figure 4 is a longitudinal sectional view through the thermostat of the embodiment shown in Figure 3.
~733~
The same reference numerals are used to iclentify similar parts in the different embodiments.
The apparatus shown in Figures 1 and 2 of the drawings comprises an outermost generally cylindrical container or canister 1 having a lid closure 2 which, as shown, may be sealed to the canister 1 by means of screw threads 3 or other sealing means. The interior of the canister 1 defines a chamber 4. An inlet 5 is present in the base of the canister 1 as shown and is arranged, in use, to be connected to an outlet from the oil lubrication system of a Diesel engine (not shown). A generally cylindrical compartment 6 is located centrally within the canister 1 and standing on a pillar 17. The canister and compartment 6 may advantageously be constructed of stainless steel sheet welded or otherwise joined together. The compartment 6 is open at the top to define an entrance 7 and contains as a close fit a body of filter material 8, e.g. of cellulosic fibres, paper or the like. A short length of pipe 9 extends between a hole 10 in the floor 11 of the compartment 6 and an oil outlet 12 in the floor of the canister.
A heat exchanger 13 having an inlet 14 connectable to a fuel reservoir (not shown), and an outlet 15 connectable to the combustion chambers of an associated engine (not shown), is located within the chamber 4. The engine may be a Diesel engine having a high fuel demand. As shown, the heat exchanger 13 comprises a length of tubing, e.g. of copper or like thermally 7 ~ ~ L
conductive material slightly spaced from and coiled several times about the compartrnent 6. The outlet 15 is diametrically opposite and vertically above the inlet 14. The diameter of the tubing is large enough not to affect the rate of flow of fuel to the engine and the length is selected according to the level of heating required.
In use, lubrication oil heated by passage through the engine lubrication system is pumped under pressure or drawn under vacuum from the engine through the inlet 5 to fill the chamber 4 sufficiently to immerse the heat exchanger 13 in the hot oil.
The oil flows continuously in the annular space 16 between the walls of the compartment 6 and the canister 1, through the entrance 7 of the compartment 6 and down through the body of filter material 8, where particles of carbon or metal or water and other harmful materials are removed. The filtered oil then returns via the hole 10 in the floor 11 of the compartment 6 and the pipe 9 to the engine. Meanwhile, fuel is pumped from the reservoir and into the inlet 14 of the heat exchanger coil 13.
During passage through the heat exchanger 13, heat is transferred from the hot flowing oil to the relatively cooler fuel. The fuel then passes under pressure through the outlet 15 and into the combustion chambers of the engine. It will be noted that the oil flows vertically up into the chamber 4 and then down to the outlet 12 through the filter whereas the fuel ~lows spirally in heat exchanger coils 13. The two fluids thus flow in different 2~33:~
directions, i.e. transversely, for efficien-t heat exchange. We nave discovered that with oil sirculating at a temperature of about 90C, it is possible to heat the fuel to a -temperature of about 40-50C or more. At such a temperature useful reductions in fuel consumption and other benefits can be achieved. Using such a system, the fuel flow is not substan-tially restricted thereby avoiding fuel starvation.
Periodically, the body of filter material will become clogged and can be replaced by removing the closure 2 and substituting a new fil'cer for the old filter in the compartment 6.
An adaptor may be present on the inlet to the heat exchanger to adjust the flow rate for different engine sizes.
As shown in Figure 3, a thermostat T may be incorporated in circuit with the apparatus. As shown the thermostat is located at the outlet pipe 15 leading from the apparatus to the fuel injectors of the engine. The thermostat T comprises a length of piping 20 interposed in the main pipeline between the outlet 15 of the apparatus of Figures 1 and 2 and the fuel injectors, not shown. At each end the length is connected by a nut 21 to the adjacent threaded ends of the main pipeline 22. The pipe 20 contains a passageway 23. The length has an inlet port 24 in one side wall connected to an auxiliary pipeline 25 to the main fuel reservoir. The pipeline 25 will typically be much shorter than 2~3~33~
the length of the heat exchanger coil 13.
A piston 26 having elongate passageways 27 is present in the passageway 23 which includes a forward shoulder 28 to limit its forward travel. The piston 26 is urged forward by a spring 29 biased between a rearward per,orate wall 30 and the rearward face 31 of the piston 26. A forward perforate wall 32 is present in the passageway 23 and has a central socket 33 to receive t'ne body of a thermostat sensor 34. The sensor 34 has a rearwardly extending push rod 35 opposite the forward face 36 of t'ne piston 26. 0 rings 37 are present a-t each end of the length. At rest, the body of the sensor body 34 is in the socket 33 in the forward perforate wall 32, with the piston 26 adjacent thereto and obstructing the inlet port 24. Heated fuel flows forwardly through the rearward perforate wall 30 through the passageways 27 of the piston 26 and through the holes of the forward perforate wall 32 about the sensor body 34. When the temperature of the heated fuel rises above a predetermined limit, say about 45C, the sensor 34 is actuated and the push rod 35 urges the piston 26 rearwardly exposing the inlet 24 according to the distance travelled by the piston 26. Unheated fuel can then flow forwardly from the auxiliary pipeline 25 to join the heated fuel disposed about the sensor 34, the two fuels being mixed on their passage through the holes in the forward perforate wall 32. When the temperature falls below the predetermined limit the sensor retracts and the spring 29 urges the piston 26 forward to ~3~73~
obstruct the port 24 again. The partC; may be dimensioned so that the unheated fuel will be drawn through the pi2e 25, without affecting the flow of the heated fuel.
The apparatus may be provided as a separate accessory, or, for exarnple, the container 1 may be integrally cast into the engine block. Two or more units may be linked together in series to suit engines of larger si~es. The thermostat may be interposed between the fuel outlet pipe and the fuel injectors as shown, or it may be associated with the oil circuit. The apparatus may be used with a petrol engine with appropriate modifications.
Because the fuel is preheated in a controlled way, i.e. to a predetermined temperature range, the fuel is consumed efficiently with much reduced pollution. In evaluations, we have been able to show a saving in fuel cost of up to 15% and the following reductions in exhaust emissions:
CO from 60 to 30 ppm and from 50 to 20 ppm NOX from 10 to 4 ppm and from 12 to 5 ppm HCHO down to 0.6 ppm The oil filtration acts to remove all particles larger than 2 micron. Calculations have shown that the distance travelled between oil changes can be extended to 100,000 km.
Claims (11)
1. An engine fuel heating apparatus comprising a container having an inlet for the ingress of hot lubrication oil from the engine and an outlet for the egress of oil back to the engine, a body of filter material being located within the container and arranged so that the oil flowing between the inlet and outlet of the container passes through the body of filter material, heat exchanger means located within the container and arranged, in use, to be substantially immersed within the hot oil flowing between the inlet and outlet of the container, the heat exchanger means having an inlet for the ingress of fuel from a reservoir thereof and an outlet for the egress of heated fuel to the engine and being arranged to pass fuel to the engine.
2. Apparatus according to Claim 1, wherein the body of filter material is located within a compartment within the container, the compartment having an open top and a closed floor, a length of pipe extending from a hole in the floor of the compartment to the outside of the container to define the oil outlet.
3. Apparatus according to Claim 1, wherein the heat exchanger means comprises a length of tubing coiled about the compartment.
4. Apparatus according to Claim 3, wherein the tubing is formed of copper.
5. Apparatus according to Claim 1, wherein the container has a compartment, the compartment having an open top and a closed floor, an oil filter element being contained within the compartment, an inlet being present in the floor of the container for the ingress of hot lubricating oil from an engine, an oil outlet comprising a pipe extending from a hole in the floor of the compartment to the outside of the container, heat exchanger means comprising a length of tubing coiled about the compartment and including an inlet for the ingress of fuel from a reservoir thereof, and an outlet for the egress of fuel to the combustion chamber of the engine, the tubing being dimensioned so as not to substantially restrict the flow of fuel to the engine, whereby, in use, hot oil is passed into the inlet of the container through the filter element in the compartment and out through the oil outlet and fuel is passed through the heat exchanger from the inlet to the outlet thereof and the fuel is continuously heated and the oil is continuously filtered.
6. Apparatus according to Claim 1, wherein thermostat control means are present to restrict the temperature to which the fuel is heated.
7. Apparatus according to Claim 6, wherein the thermostat means are arranged to mix unheated fuel with the heated fuel when the temperature of the heated fuel exceeds a predetermined limit until the temperature of the heated fuel falls below the predetermined limit.
8. Apparatus of heating engine fuel before it reaches the engine at which the heated fuel is to be consumed, the apparatus comprising means for heating the fuel, wherein thermostat means are present to limit the temperature to which the fuel is heated, the thermostat means being arranged to mix unheated fuel and heated fuel when the temperature of the fuel exceeds a predetermined limit until the temperature of the heated fuel falls below the predetermined limit.
9. A method of heating fuel for an engine prior to passing the fuel into the engine, comprising passing the fuel from a reservoir thereof into an inlet of a heat exchanger means, the heat exchanger means being substantially immersed within hot oil flowing from the engine and through a container within which the heat exchanger means is located, and passing the fuel thereby heated into the combustion chamber of the engine.
10. A method according to Claim 9, wherein the temperature of the heated fuel is maintained below a predetermined limit of about 50°C.
11. A method according to Claim 9, wherein the temperature is maintained below the limit by adding unheated fuel to the heated fuel until the temperature of the heated fuel falls below the predetermined limit.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919102217A GB9102217D0 (en) | 1991-02-01 | 1991-02-01 | Engine fuel heating apparatus |
GB91.02217.8 | 1991-02-01 | ||
GB91.22586.2 | 1991-10-24 | ||
GB919122586A GB9122586D0 (en) | 1991-02-01 | 1991-10-24 | Engine fuel heating and oil filtration apparatus |
GB91.23235.7 | 1991-10-31 | ||
GB9123135A GB2252362A (en) | 1991-02-01 | 1991-10-31 | Engine fuel heating and oil filtration |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2057331A1 true CA2057331A1 (en) | 1992-08-02 |
Family
ID=27265488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002057331A Abandoned CA2057331A1 (en) | 1991-02-01 | 1991-12-10 | Engine fuel heating and oil filtration apparatus |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0569422A1 (en) |
AU (2) | AU8899991A (en) |
BR (1) | BR9205549A (en) |
CA (1) | CA2057331A1 (en) |
FI (1) | FI933420A (en) |
IE (1) | IE914243A1 (en) |
IL (1) | IL100827A0 (en) |
MX (1) | MX9200451A (en) |
WO (1) | WO1992014048A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL318712A1 (en) * | 1997-02-27 | 1997-08-18 | Socha Adam | Method of starting and controlling operation of diesel engines |
FR2783722B1 (en) * | 1998-09-28 | 2001-02-16 | Alfa Laval Moatti Snc | FLUID TREATMENT ASSEMBLY WITH POLLUTED FLUID TEMPERATURE CONTROL AT THE FILTER ELEMENT |
DE19945772A1 (en) * | 1999-09-24 | 2001-03-29 | Deere & Co | Fuel filter, filter element and vehicle |
JP2004513283A (en) * | 2000-10-31 | 2004-04-30 | アーヴィン テクノロジーズ,インコーポレイテッド | Oil filter with integrated cooler |
CN104492156A (en) * | 2014-12-18 | 2015-04-08 | 无锡华中科技有限公司 | Double-filtering-type heavy oil filter |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2541377B1 (en) * | 1983-02-22 | 1987-06-05 | Scoma Energie | METHOD AND DEVICE FOR HEAT EXCHANGING, PARTICULARLY FOR HEATING FUEL IN INTERNAL COMBUSTION ENGINES, ESPECIALLY DIESEL |
FR2578584B1 (en) * | 1985-03-07 | 1990-03-23 | Carbonnelle Hubert | FUEL HEATING DEVICE FOR INTERNAL COMBUSTION ENGINES |
US4648372A (en) * | 1985-04-23 | 1987-03-10 | Michaud Jocelyn P | Fuel pre-heater |
US4700047A (en) * | 1986-05-23 | 1987-10-13 | Crossett & Sons, Inc. | Fuel preheater for diesel engines |
IL88325A (en) * | 1987-11-13 | 1992-07-15 | Turbex 2000 Sa | Apparatus for thermally treating fuel supplied to engine |
-
1991
- 1991-12-06 IE IE424391A patent/IE914243A1/en not_active Application Discontinuation
- 1991-12-10 AU AU88999/91A patent/AU8899991A/en not_active Abandoned
- 1991-12-10 CA CA002057331A patent/CA2057331A1/en not_active Abandoned
-
1992
- 1992-01-30 AU AU11857/92A patent/AU1185792A/en not_active Abandoned
- 1992-01-30 EP EP92903601A patent/EP0569422A1/en not_active Withdrawn
- 1992-01-30 WO PCT/GB1992/000180 patent/WO1992014048A1/en not_active Application Discontinuation
- 1992-01-30 BR BR9205549A patent/BR9205549A/en not_active Application Discontinuation
- 1992-01-31 MX MX9200451A patent/MX9200451A/en unknown
- 1992-01-31 IL IL100827A patent/IL100827A0/en unknown
-
1993
- 1993-07-30 FI FI933420A patent/FI933420A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
IL100827A0 (en) | 1992-09-06 |
MX9200451A (en) | 1993-08-01 |
WO1992014048A1 (en) | 1992-08-20 |
FI933420A0 (en) | 1993-07-30 |
IE914243A1 (en) | 1992-08-12 |
AU1185792A (en) | 1992-09-07 |
AU8899991A (en) | 1992-08-06 |
BR9205549A (en) | 1994-04-26 |
FI933420A (en) | 1993-07-30 |
EP0569422A1 (en) | 1993-11-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2120053C1 (en) | Power fluid heating system | |
US5443053A (en) | Fuel heater | |
US10458308B2 (en) | Apparatus for modifying an engine oil cooling system | |
US4933093A (en) | Fuel filter | |
US4510051A (en) | Filter designed for the simultaneous filtration and preheating of the fuel | |
US4432329A (en) | Apparatus for heating fuel injected into a diesel engine | |
US5085198A (en) | Low pressure fuel supply system for a fuel injection pump | |
US5336396A (en) | Waste oil management system | |
JP2013139820A (en) | Multiple fuel system for internal combustion engine | |
US4664088A (en) | Fuel feed device, particularly for diesel engines, with fuel filtering, heating and emulsifying members | |
US11454197B2 (en) | System for injecting an aqueous solution into an injection engine | |
US5554278A (en) | Quick change oil recycler | |
US5411005A (en) | Emissions and fuel control system and device | |
US9005438B2 (en) | Device for a fuel filter system | |
CA2057331A1 (en) | Engine fuel heating and oil filtration apparatus | |
US6142179A (en) | Feed and filtering system for liquid media such as fuels | |
GB2252362A (en) | Engine fuel heating and oil filtration | |
US20030168402A1 (en) | Fluid treatment system and apparatus | |
US4454841A (en) | Automatic liquid thermal pressure regulator and balancing system | |
US20070158466A1 (en) | Nozzle assembly | |
AU763201B2 (en) | Apparatus for feeding liquid petroleum gas to internal combustion engines, comprising an isobaric vaporiser and pressure reducer downstream of it | |
US4098231A (en) | Apparatus for improving the efficiency and reducing the hydrocarbon emissions of carbureted engines | |
DE102007049582A1 (en) | Fuel tank for use in diesel engine connecting device, has regulating valve arranged in fuel return line attached to outlet port, and filters arranged within housing between inlet ports and between one inlet port and another outlet port | |
CA1101284A (en) | Fuel vaporizer for internal combustion engine | |
CN103557096B (en) | Spray amount control box and use its auxiliary combustion equipment, internal-combustion engine, the traffic tool |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |