CA1266594A - Fuel preheater for diesel engines - Google Patents
Fuel preheater for diesel enginesInfo
- Publication number
- CA1266594A CA1266594A CA000525500A CA525500A CA1266594A CA 1266594 A CA1266594 A CA 1266594A CA 000525500 A CA000525500 A CA 000525500A CA 525500 A CA525500 A CA 525500A CA 1266594 A CA1266594 A CA 1266594A
- Authority
- CA
- Canada
- Prior art keywords
- heat exchange
- fuel
- unit
- engine
- diesel
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 60
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000002826 coolant Substances 0.000 claims abstract description 9
- 239000002283 diesel fuel Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 6
- 230000009969 flowable effect Effects 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001517310 Eria Species 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A preheating unit for fuel supplied to a diesel engine.
The unit includes a heat exchanger that uses the engine's coolant to warm and expand the fuel prior to introduction into the engine.
To improve the heat exchange efficiency, the unit has a distribution probe that distributes the fuel over the heat exchanger coils.
The unit also has an electrical heating unit for use during cold weather to assist in the initial heating of the fuel prior to the time the engine reaches operating temperature.
A preheating unit for fuel supplied to a diesel engine.
The unit includes a heat exchanger that uses the engine's coolant to warm and expand the fuel prior to introduction into the engine.
To improve the heat exchange efficiency, the unit has a distribution probe that distributes the fuel over the heat exchanger coils.
The unit also has an electrical heating unit for use during cold weather to assist in the initial heating of the fuel prior to the time the engine reaches operating temperature.
Description
5~1~
FU~L PRFHEATER FOR DIESEL ENGINES
BACKGROUND OF THE INVENTION
The prior art discloses numerous forms of fuel heaters that purport to increase fuel efficlency of engines utilizing liquid fuel, both internal combustion and diesel engines. The problems are somewhat different when preheating fuel for internal combustion engines than when preheating diesel fuel for diesel engines~ Although there are known units for preheating fuel utilizing the heat from the engine coolant, these units have not produced substantial enough savings in fuel to justify their cost. Also, in extremely co]d weather, the units of the prior art have not proven to be effective in preventing gelling.
Therefore, there is a need for a simple and inexpensive but yet efficient form of preheating unit which will ln fact substantially improve the fuel consumption and one whlch will also be effective in extremely cold temperatures.
SUMMARY OF T~E INVENTION
The fuel preheating unit of the inventLon includes a heat exchanger that has a heating coil through which the engine coolant or engine oil is passed. The diesel fuel is sprayed onto the heating coil to raise the temperature of the fuel to a predetermined desired temperature after which the heated and now expanded fuel is introduced into the engine. The unit is also provided with an electrical heating element for use in extremely cold temperatures to preheat the fuel until the engine operating temperature is reached.
More particularly the invention in one aspect pertains to a unit for preheating fuel for diesel engines having an engine coolant system and a lubrication system utilizing a flowable lubricant. The unit includes a housing providing a fluid-tight enclosure and a heat exchange coil positioned in and spaced above the bottom of the enclosure and having a plurality of loops providing a continuous path for the flow of the fuel to be heated. The heat exchange coil has at least one foot of length for each 25 cubic inches of volume of the enclosure. A diesel fuel inlet is in the housing and is connected to one end of the heat exchange coil. A diesel fuel outlet is in the housing and is connected to the other end of the heat exchange coil. An inlet in the housing connects the interior of the enclosure surrounding the coi] to a source of a hot heat exchange medium in a diesel engine so as to provide a source of heat for heating the neat exchange coil. An outlet near the top of the housing provides for return of the heat exchange medium to a diesel engine. Spray tube means extends horizontally from the inlet for the heat exchange medlum and along the bottom of the housing beneath substantially the entire length of the heat exchange coil, the means having a plurality of upwardly directed openings to provide for discharge of the heat exchange medium toward the coll and agitation of the heat exchange medium in the enclosure around and over the heat exchange coil.
BRIEF DESCRIPTION OP THE ~RAWINGS
Fig. 1 is a schematic diagram of the fuel system of a diesel engine and showing the preheating unit of the invention in place in the system; and Fig. 2 is a perspective view, partly in section, of a preheating unit constructed according to the principles of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION
Referring first to Fig. 1, there is shown schematically a diesel engine 10 which has a high water jacket 12 and a low water Jacket 14.
The engine 10 is supplied with fuel from a tank 16, the fuel being pumped through a fuel filter 18 by a fuel pump 20 into the combustion chambers (notshown) of the engine in a well-known manner. An overflow line 22 returns excess fuel to the tank 16.
In Fig. 1 is shown in place in the system just described a fuel preheating unit indicated generally by the reference numeral 24.
As illustrated in Fig. 1, the preheating unit is mounted in the fuel line between the tank 16 and filter 18, ~he unit 24 having a fuel inlet 26 and a fuel outlet 28. The preheating unit 24 also has a water inlet 30 supplied by a line 32 connected to the high water jacket 12 and a water outlet 34 connected by line 36 to the low water jacket 14.
The details of ~he ~uel preheating unit 24 will now be described in detail.
Referring to Fig. 2, the fuel preheating unit 24 is preferably a rectangular shaped enclosure having a eOp wall 38, a bottom wall 40 which are joined by side walls 42 and end walls 44. As seen in Fig. 2, the water outlet 34 and fuel inlet 26 are in one end wall while the fuel outlet 28 in water inlet 30 are in the opposite end wall 44.
Inside of the enclosure, there is a heat exchange coil 46, which consists of a plurality of loops of tubing through which the heated fuel flows from the inlet 26 to the outlet 28, being pumped through the unit by the fuel pump 20. Positioned along the bottom wall 40 and connected to the water inlet 26, is a spray tube 48. As shown in Fig. 2, spray tube 48 extends from the water inlet 30 in one end wall 44 to the other end wall 44, the tube 48 having formed along its top surface a plurality of openings 50. The end of tube 48 opposite the water inlet 30 is closed, and thus pressurized water entering water inlet 30 will be sprayed upwardly over and around the loops of the heat exchange coil 46. The enclosure comprising the unit 24 will rapidly fill with water, which will then flow out of the water outlet 34 into the low water jacket 14. The spray tube 48 will constantly agitate the water inside of the unit 24 causing it to circulate continuously over and around the coils of the heat exchange unit 46. In some instances, additional loops of coil can be used in place of the spray tube 48.
When the engine 10 has not been running and therefore the coolant from ehe hot water jacket 12 is cold, obviously, no heat will be supplied to the preheating unit 24 until the engine has been operated for a few minutes. Especially in cold weather, diesel fuel will gel, and we have therefore provided an electrical heating element 52 which can be plugged in to a source of electrical energy by use of the electrical cord and plug 54. Thus, especially in extremely cold weather when the diesel fuel is apt to gel, the heating unit 52 can be plugged into a source of electrical energy to prevent the fuel in the preheating unit 24 from gelling. There will be sufficient fuel in the preheating unit 24 to start the engine even when the ~6~
temperature is below zero which would normally cause gelling of the fuel. Once started, the engine will quickly approach operating temperature and the hot water from the high water jacket 12 will start warming the fuel and the element 52 can be unplugged.
We have found that the ideal temperature of the fuel leaving the preheating unit 24 is 190-195 F. The minimum temperature for the unit to be effective is 180~ F. At 195 F, diesel fuel will expand 10-15% in volume, and the expansion in volume alone will produce an equivalent increase in fuel economy since the fuel enters the engine by volume and not by weight. With the unit of the invention, No. 2 diesel fuel can be used year 'round, since this type of fuel begins its expansion at 168 and reaches its maximum expansion at i960.
In this temperature range, all of the elements that comprise the diesel fuel are at the optimum temperature for ignition.
For this reason, we have also discovered that the engine will run cleaner and emissions will be reduced as much as 78Z.
The familiar black smoke that is customarily emitted from the exhaust of diesel engines is virtually eliminated particularly during the acceleration of the engine from a lower to higher speed.
We have also found ehat since the fuel is expanded when it is pumped into the fuel injectors of the engine 10, less fuel is injected and more is returned to the fuel tank, through the overflow line 22. This fuel is already preheated, and in turn assists in heating the entire fuel system. Using the preheating unit of the invention, all gelling of diesel fuel has been eliminated without the necessity of additives. Moreover, a vehicle operator is able to use the less expensive No. 2 fuel year round.
The preheating unit of the inven~ion has application in any type of diesel engine such as those used in passenger vehicles, trucks, semi-trucks of all sizes and construction equipment. In addition, the unit of the invention c-an be also be used in applications where a diesel engine is used as a stationary power unit for driving machinery. We have also found the unit of the invention to be useful in marine engines. Particularly in marine applications not coolel by fresh water cooling systems, the heat to the unit can be supplied from the engine oil ra~her than the engine coolant. We have found that the unit of the invention will operate equally as well when heated with engine oil as with ~he engine coolant.
Although the preferred embodiment shown in the drawings has not been shoh~ as an insulated enclosure, it is preferable to provide i~suIation with a suitable insulating ma~eria~ such a styrofoam, along the end walls, side walls and top and bottom walls. It may also be preferable to insulate the incoming water line and the outgoing fuel lines to improve the efficiency of the unit.
Also, we have produced and tested units of varying si~es for different size engines. For example, a large unit for use with an engine when fuel consumption is between 4 and 21 gallons per hour, would preferably be 16" long and 4" square and contain 11 feet of l/2" copper tubing. A smaller unit for use with engines consuming fuel at the rate of up to 4.5 gallons per hour would be approximately half the volume, being 4" and 8" long and containing approximacely 5 feet of 1/2"
copper eubing in the heat exchanger. An even smaller unit has been built that is 8" long, 6" wide and 2" tall and containing approximately 5 feet of 3/8" copper tubing. The smallest of the units is generally used for small engines consuming less than three gallons of fuel per hour.
We have found that to maintain the fuel in che unit a sufficient amount of time to properly expand the fuel that approximately one foot of copper tubing is required for each twenty five cubic inches of volume of the heating fluid. If an insufficient length of tubing is used, there will not be adequate heat exchange to preheat the fuel.
The preferred embodiment of the invention has produced fuel savings of 10-20% in some applications. We have described the unit of the invention only in connection with the preferred embodiment, and have indicated that there are various revisions and modifications that can be made to the preferred embodiment without departing from the spirit and scope of the invencion.
It will be obvious to those skilled in the art that various other revisions and n-odifications can be made to the preferred _5 1~2~
embodi~ent. Ic it our intention however that all such revisions and modifications will be included within the scope of the followin~ claims.
FU~L PRFHEATER FOR DIESEL ENGINES
BACKGROUND OF THE INVENTION
The prior art discloses numerous forms of fuel heaters that purport to increase fuel efficlency of engines utilizing liquid fuel, both internal combustion and diesel engines. The problems are somewhat different when preheating fuel for internal combustion engines than when preheating diesel fuel for diesel engines~ Although there are known units for preheating fuel utilizing the heat from the engine coolant, these units have not produced substantial enough savings in fuel to justify their cost. Also, in extremely co]d weather, the units of the prior art have not proven to be effective in preventing gelling.
Therefore, there is a need for a simple and inexpensive but yet efficient form of preheating unit which will ln fact substantially improve the fuel consumption and one whlch will also be effective in extremely cold temperatures.
SUMMARY OF T~E INVENTION
The fuel preheating unit of the inventLon includes a heat exchanger that has a heating coil through which the engine coolant or engine oil is passed. The diesel fuel is sprayed onto the heating coil to raise the temperature of the fuel to a predetermined desired temperature after which the heated and now expanded fuel is introduced into the engine. The unit is also provided with an electrical heating element for use in extremely cold temperatures to preheat the fuel until the engine operating temperature is reached.
More particularly the invention in one aspect pertains to a unit for preheating fuel for diesel engines having an engine coolant system and a lubrication system utilizing a flowable lubricant. The unit includes a housing providing a fluid-tight enclosure and a heat exchange coil positioned in and spaced above the bottom of the enclosure and having a plurality of loops providing a continuous path for the flow of the fuel to be heated. The heat exchange coil has at least one foot of length for each 25 cubic inches of volume of the enclosure. A diesel fuel inlet is in the housing and is connected to one end of the heat exchange coil. A diesel fuel outlet is in the housing and is connected to the other end of the heat exchange coil. An inlet in the housing connects the interior of the enclosure surrounding the coi] to a source of a hot heat exchange medium in a diesel engine so as to provide a source of heat for heating the neat exchange coil. An outlet near the top of the housing provides for return of the heat exchange medium to a diesel engine. Spray tube means extends horizontally from the inlet for the heat exchange medlum and along the bottom of the housing beneath substantially the entire length of the heat exchange coil, the means having a plurality of upwardly directed openings to provide for discharge of the heat exchange medium toward the coll and agitation of the heat exchange medium in the enclosure around and over the heat exchange coil.
BRIEF DESCRIPTION OP THE ~RAWINGS
Fig. 1 is a schematic diagram of the fuel system of a diesel engine and showing the preheating unit of the invention in place in the system; and Fig. 2 is a perspective view, partly in section, of a preheating unit constructed according to the principles of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION
Referring first to Fig. 1, there is shown schematically a diesel engine 10 which has a high water jacket 12 and a low water Jacket 14.
The engine 10 is supplied with fuel from a tank 16, the fuel being pumped through a fuel filter 18 by a fuel pump 20 into the combustion chambers (notshown) of the engine in a well-known manner. An overflow line 22 returns excess fuel to the tank 16.
In Fig. 1 is shown in place in the system just described a fuel preheating unit indicated generally by the reference numeral 24.
As illustrated in Fig. 1, the preheating unit is mounted in the fuel line between the tank 16 and filter 18, ~he unit 24 having a fuel inlet 26 and a fuel outlet 28. The preheating unit 24 also has a water inlet 30 supplied by a line 32 connected to the high water jacket 12 and a water outlet 34 connected by line 36 to the low water jacket 14.
The details of ~he ~uel preheating unit 24 will now be described in detail.
Referring to Fig. 2, the fuel preheating unit 24 is preferably a rectangular shaped enclosure having a eOp wall 38, a bottom wall 40 which are joined by side walls 42 and end walls 44. As seen in Fig. 2, the water outlet 34 and fuel inlet 26 are in one end wall while the fuel outlet 28 in water inlet 30 are in the opposite end wall 44.
Inside of the enclosure, there is a heat exchange coil 46, which consists of a plurality of loops of tubing through which the heated fuel flows from the inlet 26 to the outlet 28, being pumped through the unit by the fuel pump 20. Positioned along the bottom wall 40 and connected to the water inlet 26, is a spray tube 48. As shown in Fig. 2, spray tube 48 extends from the water inlet 30 in one end wall 44 to the other end wall 44, the tube 48 having formed along its top surface a plurality of openings 50. The end of tube 48 opposite the water inlet 30 is closed, and thus pressurized water entering water inlet 30 will be sprayed upwardly over and around the loops of the heat exchange coil 46. The enclosure comprising the unit 24 will rapidly fill with water, which will then flow out of the water outlet 34 into the low water jacket 14. The spray tube 48 will constantly agitate the water inside of the unit 24 causing it to circulate continuously over and around the coils of the heat exchange unit 46. In some instances, additional loops of coil can be used in place of the spray tube 48.
When the engine 10 has not been running and therefore the coolant from ehe hot water jacket 12 is cold, obviously, no heat will be supplied to the preheating unit 24 until the engine has been operated for a few minutes. Especially in cold weather, diesel fuel will gel, and we have therefore provided an electrical heating element 52 which can be plugged in to a source of electrical energy by use of the electrical cord and plug 54. Thus, especially in extremely cold weather when the diesel fuel is apt to gel, the heating unit 52 can be plugged into a source of electrical energy to prevent the fuel in the preheating unit 24 from gelling. There will be sufficient fuel in the preheating unit 24 to start the engine even when the ~6~
temperature is below zero which would normally cause gelling of the fuel. Once started, the engine will quickly approach operating temperature and the hot water from the high water jacket 12 will start warming the fuel and the element 52 can be unplugged.
We have found that the ideal temperature of the fuel leaving the preheating unit 24 is 190-195 F. The minimum temperature for the unit to be effective is 180~ F. At 195 F, diesel fuel will expand 10-15% in volume, and the expansion in volume alone will produce an equivalent increase in fuel economy since the fuel enters the engine by volume and not by weight. With the unit of the invention, No. 2 diesel fuel can be used year 'round, since this type of fuel begins its expansion at 168 and reaches its maximum expansion at i960.
In this temperature range, all of the elements that comprise the diesel fuel are at the optimum temperature for ignition.
For this reason, we have also discovered that the engine will run cleaner and emissions will be reduced as much as 78Z.
The familiar black smoke that is customarily emitted from the exhaust of diesel engines is virtually eliminated particularly during the acceleration of the engine from a lower to higher speed.
We have also found ehat since the fuel is expanded when it is pumped into the fuel injectors of the engine 10, less fuel is injected and more is returned to the fuel tank, through the overflow line 22. This fuel is already preheated, and in turn assists in heating the entire fuel system. Using the preheating unit of the invention, all gelling of diesel fuel has been eliminated without the necessity of additives. Moreover, a vehicle operator is able to use the less expensive No. 2 fuel year round.
The preheating unit of the inven~ion has application in any type of diesel engine such as those used in passenger vehicles, trucks, semi-trucks of all sizes and construction equipment. In addition, the unit of the invention c-an be also be used in applications where a diesel engine is used as a stationary power unit for driving machinery. We have also found the unit of the invention to be useful in marine engines. Particularly in marine applications not coolel by fresh water cooling systems, the heat to the unit can be supplied from the engine oil ra~her than the engine coolant. We have found that the unit of the invention will operate equally as well when heated with engine oil as with ~he engine coolant.
Although the preferred embodiment shown in the drawings has not been shoh~ as an insulated enclosure, it is preferable to provide i~suIation with a suitable insulating ma~eria~ such a styrofoam, along the end walls, side walls and top and bottom walls. It may also be preferable to insulate the incoming water line and the outgoing fuel lines to improve the efficiency of the unit.
Also, we have produced and tested units of varying si~es for different size engines. For example, a large unit for use with an engine when fuel consumption is between 4 and 21 gallons per hour, would preferably be 16" long and 4" square and contain 11 feet of l/2" copper tubing. A smaller unit for use with engines consuming fuel at the rate of up to 4.5 gallons per hour would be approximately half the volume, being 4" and 8" long and containing approximacely 5 feet of 1/2"
copper eubing in the heat exchanger. An even smaller unit has been built that is 8" long, 6" wide and 2" tall and containing approximately 5 feet of 3/8" copper tubing. The smallest of the units is generally used for small engines consuming less than three gallons of fuel per hour.
We have found that to maintain the fuel in che unit a sufficient amount of time to properly expand the fuel that approximately one foot of copper tubing is required for each twenty five cubic inches of volume of the heating fluid. If an insufficient length of tubing is used, there will not be adequate heat exchange to preheat the fuel.
The preferred embodiment of the invention has produced fuel savings of 10-20% in some applications. We have described the unit of the invention only in connection with the preferred embodiment, and have indicated that there are various revisions and modifications that can be made to the preferred embodiment without departing from the spirit and scope of the invencion.
It will be obvious to those skilled in the art that various other revisions and n-odifications can be made to the preferred _5 1~2~
embodi~ent. Ic it our intention however that all such revisions and modifications will be included within the scope of the followin~ claims.
Claims (4)
1. A unit for preheating fuel for diesel engines having an engine coolant system and a lubrication system utilizing a flowable lubricant, said unit comprising a housing providing a fluid-tight enclosure, a heat exchange coil positioned in and spaced above the bottom of said enclosure and having a plurality of loops providing a continuous path for the flow of the fuel to be heated, the heat exchange coil having at least one foot of length for each 25 cubic inches of volume of the enclosure, a diesel fuel inlet in said housing and connected to one end of the heat exchange coil, a diesel fuel outlet in said housing and connected to the other end of the heat exchange coil, an inlet in said housing for connection of the interior of said enclosure surrounding said coil to a source of a hot heat exchange medium in a diesel engine so as to provide a source of heat for heating said heat exchange coil, an outlet near the top of said housing to provide for return of the heat exchange medium to a diesel engine, and spray tube means extending horizontally from the inlet for the heat exchange medium and along the bottom of the housing beneath substantially the entire length of the heat exchange coil, said means having a plurality of upwardly directed openings to provide for discharge of the heat exchange medium toward the coil and agitation of the heat exchange medium in the enclosure around and over the heat exchange coil.
2. The unit for preheating fuel for diesel engines as recited in claim 1 in which the source of the heat exchange medium is the engine coolant of a diesel engine.
3. The unit for preheating fuel for diesel engines as recited in claim 1 in which the source of a heat exchange medium is the flowable lubricant from the lubrication system of a diesel engine.
4. The unit for preheating fuel as recited in claim 1 in which there is an electrical heating element in said enclosure for heating said heat exchange medium contained therein, and a means is provided for connecting said heating element to a source of electrical power
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US866,371 | 1986-05-23 | ||
| US06/866,371 US4700047A (en) | 1986-05-23 | 1986-05-23 | Fuel preheater for diesel engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1266594A true CA1266594A (en) | 1990-03-13 |
Family
ID=25347468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000525500A Expired CA1266594A (en) | 1986-05-23 | 1986-12-16 | Fuel preheater for diesel engines |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1266594A (en) |
-
1986
- 1986-12-16 CA CA000525500A patent/CA1266594A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4700047A (en) | Fuel preheater for diesel engines | |
| CA1188942A (en) | Apparatus for heating fuel injected into a diesel engine | |
| US3989019A (en) | Fuel heating apparatus | |
| US5443053A (en) | Fuel heater | |
| US4296716A (en) | Internal combustion engine for an automobile with a divided oil pan | |
| CA1170521A (en) | Apparatus for maintaining a diesel engine in restarting condition | |
| US4180036A (en) | Fuel temperature control | |
| CN101598061B (en) | Engine-cooling system | |
| SE8400507L (en) | FUEL SUPPLY DEVICE FOR DIESEL ENGINES FOR VEHICLES | |
| US4499886A (en) | Diesel fuel heater | |
| US3929187A (en) | Vibration resistant heat exchanger for internal combustion engines | |
| US4350134A (en) | Method and apparatus for producing an air/fuel vapor mixture | |
| US5411005A (en) | Emissions and fuel control system and device | |
| US5118451A (en) | Fuel vaporization device | |
| WO1989003478A1 (en) | Fuel preheater for diesel engines | |
| US4157700A (en) | Pre-vaporization system | |
| CA1266594A (en) | Fuel preheater for diesel engines | |
| US2748758A (en) | Fuel system for internal combustion engines | |
| GB2108262A (en) | Liquid-cooled i.c. engine | |
| CN2074821U (en) | Quick pre-heating device for automobile engine | |
| US20100147392A1 (en) | Process and apparatus for thawing jelled diesel fuel | |
| US2630106A (en) | Preheating device for starting internal-combustion engines | |
| US4364365A (en) | Fuel vaporizer for internal combustion engine | |
| CN210289976U (en) | A fuel heating device | |
| GB2046837A (en) | Intake air or mixture heating or cooling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |