CA2361113C - Method and system for heat recovery for an internal combustion engine - Google Patents
Method and system for heat recovery for an internal combustion engine Download PDFInfo
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- CA2361113C CA2361113C CA002361113A CA2361113A CA2361113C CA 2361113 C CA2361113 C CA 2361113C CA 002361113 A CA002361113 A CA 002361113A CA 2361113 A CA2361113 A CA 2361113A CA 2361113 C CA2361113 C CA 2361113C
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- fluid
- heat
- internal combustion
- combustion engine
- heat exchanging
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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
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Heat recovery for internal combustion engine, includes introducing a first fluid into heat exchanging element, and withdrawing the heated first fluid from the heat exchanger elements; and supplying at least one second fluid which is used during the operation of the internal combustion engine and is heated, so as to flow outside and in contact with the heat exchanging elements to transfer heat through walls of the heat exchanging element from the second fluid to said first fluid.
Description
METHOD OF AND SYSTEM FOR HEAT RECOVERY FOR AN INTERNAL
COMBUSTION ENGINE
BACKGROUND OF THE INVENTION
The present invention relates to method of and system for heat recovery for an internal combustion engine.
Although the efficiency of the internal combustion engine has been improved remarkably in the past 50 years, it is still difficult to operate such an engine with an efficiency of over 35%. The efficiency drops off dramatically as an engine ages and may deteriorate to less than 10% if it has been improperly maintained. With only 10-35% efficiency, this means that the remaining fuel consumption creates heat which therefore is largely unused. Thus, the waste heat from internal combustion engines is considerable and is not being used constructively. Some solutions directed to this objective are disclosed for example in U.S. patents no 4,378,336;
5,035,867;
5,250,489; 5,711,071; 5,869,011; 5,987,885; 6,039,913; and Canadian patents 2184632 and 2247759. It is believed that the use of heat in the internal combustion engine can be further improved.
COMBUSTION ENGINE
BACKGROUND OF THE INVENTION
The present invention relates to method of and system for heat recovery for an internal combustion engine.
Although the efficiency of the internal combustion engine has been improved remarkably in the past 50 years, it is still difficult to operate such an engine with an efficiency of over 35%. The efficiency drops off dramatically as an engine ages and may deteriorate to less than 10% if it has been improperly maintained. With only 10-35% efficiency, this means that the remaining fuel consumption creates heat which therefore is largely unused. Thus, the waste heat from internal combustion engines is considerable and is not being used constructively. Some solutions directed to this objective are disclosed for example in U.S. patents no 4,378,336;
5,035,867;
5,250,489; 5,711,071; 5,869,011; 5,987,885; 6,039,913; and Canadian patents 2184632 and 2247759. It is believed that the use of heat in the internal combustion engine can be further improved.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide an improved method of and system for heat recovery for an internal combustion engine.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a method for heat recovery for an internal combustion engine, which includes introducing a first fluid into heat exchanging elements of a heat exchanger for heating the first fluid, and withdrawing the heated fluid from the heat exchanger elements;
and supplying at least one second fluid which is used during the operation of the internal combustion engine and is heated, so as to flow outside and in contact with said heat exchanging elements to transfer heat through walls of said heat exchanging elements from said second fluid to said first fluid.
In accordance with another feature of the present invention, the system for heat recovery is proposed which has a heat exchanger including a plurality of heat exchanging elements; means for introducing a first fluid into said heat exchanging elements for heating in the first fluid, and withdrawing the heated first fluid from the heat exchanger elements; and supplying at least one second fluid which is used during the operation of the internal combustion engine and is heated, so as to flow outside and in contact with said heat exchanging elements to transfer heat through walls of said heat exchanging element from the second fluid to said first fluid.
When the method is performed and the system is designed in S accordance with the present invention, heat produced during the operation of the internal combustion engine is efficiently utilized.
In accordance with a further aspect of the present invention there is provided, a method of heat recovery for an internal combustion engine, comprising the steps of:
introducing a first fluid into at least one heat exchanging element of a heat exchanger for heating said first fluid, said heat exchanging element having a catalytic material on an outer surface thereof, supplying at least one heated second fluid which includes at least engine exhaust produced by the internal combustion engine, so as to flow through said heat exchanger, outside and in contact with said heat exchanging element coated with said catalyst material to transfer heat through said heat exchanging element from said second fluid to said first fluid, said contact of said second fluid with said catalyst causing a catalytic reaction to produce additional heat for transfer to said first fluid, withdrawing the first fluid from said heat exchanging element of said heat exchanger.
In accordance with another aspect of the present invention, there is provided an apparatus for heat recovery for an internal combustion engine, comprising:
a heat exchanger including a plurality of heat exchanging elements;
means for introducing a first fluid into at least one of said plurality of heat exchanging elements for heating said first fluid, said plurality of heat exchanging elements having a catalytic material on an outer surface thereof; means of supplying at least one second fluid which includes at least engine exhaust produced by the operation of the internal combustion engine, so as to flow through said heat exchanger, outside and in contact with said plurality of heat exchanging elements coated with said catalyst material to transfer heat through said plurality of heat exchanging elements from said second fluid to said first fluid, said contact of said second fluid with said catalyst causing a catalytic reaction to produce additional heat;
and means for withdrawing said first heated fluid from said plurality of heat exchanging elements of said heat exchanger.
The novel features which are considered as characteristic for the invention, as well as the invention itself, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a view illustrating schematically a method of and a system for heat recovery for an internal combustion engine;
Figure 2 is a view showing a heat exchanger of the inventive system;
- 4a -Figure 3 is a view showing additional components of the inventive system; and Figures 4-13 show further embodiments of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A system for heat recovery operates in accordance with an inventive heat recovery method is illustrated in Figure 1. Reference numeral 19 identifies an internal combustion engine and reference numeral 19a identifies a crankcase of the engine. A lubricant discharge line 19b extends from the engine to a heat exchanger and in particular to a heat exchanger area 3b, while a lubricant return line 19c extends from the heat exchanger area 3b back to the engine. A coolant discharge line 19g extends from the engine to the heat exchanger and an particular to the heat exchanger are 3a, while a coolant return line 191 extends from the heat exchanger are 3a to an engine radiator 19f. An exhaust gas discharge line 5 extends from the engine to the heat exchanger and in particular to a heat exchanger are 3c and an exhaust gas discharge line 8 extends from the heat exchanger area 3c to atmosphere.
The heat exchanger has a plurality of heat , exchanging elements (tubes) or a tube bundle 3. A first fluid which can be for example a cold water or a motive fluid is introduced into the heat exchanger through a first fluid supply line 1 into an interior of the tubes 3, and exits from the tubes 3 through a first fluid discharge line 4. It is then delivered to a first fluid application area 4a which can be formed for example as a turbine which drives a generator. Then, through discharge line 4b it is connected to a fluid pump 4c which pumps the first fluid through the line 1 again into the tubes of the heat exchanger 3. The heat exchanger 3 has the above-described heat exchanger areas.
The crankcase 19a is provided with a crankcase vent 23 with a vent line 23a which leads to a venturi 21, which draws the crankcase fumes into the engine exhaust pipe 5.
During the operation of the internal combustion engine the first fluid is circulated through the interior of the pipes of the heat exchanger 3 while the second fluid which is a fluid selected from the group consisting of the coolant, the lubricant, the exhaust, two of these fluids, or all three of these fluids is also supplied to the heat exchanger so as to be in contact with an outer surface of the tubes and to transfer the heat through the wall of the tubes to the first fluid inside the tubes.
The tubes in the heat exchanger area 3c can be coated with a variety of catalytic compounds which can cause some of the constituents of the gas to react with oxygen and in the process release heat. The combination of the heat from the exhaust gas and the heat released from the catalytic process is transferred through the walls of the heat exchanging elements to the first fluid inside the tubes.
As shown in Figure 2, electrically controlled valves 11,11 a, l l b, 11 c, 11 d are provided for delivery of air and/or fuel through a heat exchanger housing 3c to various heat exchange areas and to the crankcase vent 23a from the air pump and a pressurized fuel supply 17. This will dilute heavy materials within the system masking the process more efficient. The electronically controlled valves control the flow of air and/or fuel by way of signals sent by a microprocessor 15 through valve control wires 13b, 13c, 13d, 17a. This is in response to information fed to the microprocessor 15, which controls the air pump 16, from temperature sensors 12b, 12c, 12d and a gas constituent sensor 18 by way of sensor wires 14b, 14c, 14d, 18a.
Figure 3 shows ignitors 12a, 12g, 12f, 12h, which are located downstream of the valves 11 a, 11 b, 11 c, 11 d. They are activated by an ignition power source 12 after having received the signal to do so from the microprocessor 15 through the wire 12m. The microprocessor activates the ignitors 12a, 12f, 12g, 12h through ignition wires 12i, 12j, 12k, 121 in response to signal received from temperature sensors 12b, 12c, 12d and the gas constituents sensor 18, by temperature sensor wires 14b, 14c, 14d and the gas constituents wire 18a.
As mentioned above, in accordance with the present invention, a mixture of hydrocarbon fuel, such as propane, and air can be introduced into the discharge stream exiting the crankcase.
Air fuel mixture can also be effectively introduce into the stream in addition to that discussed above; in the following manner:
- directly into venturi 21 (Figure 4);
- in line 5 through a second venturi upstream of venturi 21 (Figure 5), - in line 5 through a second venturi downstream of venturi 21 (Figure 6), - in line 5 upstream of venturi 21 (Figure 7) - in line 5 downstream of venturi 21 (Figure 8);
It is also possible to introduce the fuel and air in two separate lines. A
line of fuel and a line of air may be introduced into the discharge stream in the following manners:
- directly into venturi 21 (Figure 9);
- in line 5 through a second venturi upstream of venturi 21 (Figure 10), - in line 5 through a second venturi downstream of venturi 21 (Figure 11 ), - in line 5 upstream of Figure 21 (Figure 12) - in line 5 downstream of venturi 21 (Figure 13).
_g_ It will be understood that each of the elements described above, or two or more together, may also fmd a useful application in other types of methods and constructions differing from the types described above.
While the invention has been illustrated and described as embodied in method of and system for heat recovery for an internal combustion engine, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.
_g_
Accordingly, it is an object of the present invention to provide an improved method of and system for heat recovery for an internal combustion engine.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a method for heat recovery for an internal combustion engine, which includes introducing a first fluid into heat exchanging elements of a heat exchanger for heating the first fluid, and withdrawing the heated fluid from the heat exchanger elements;
and supplying at least one second fluid which is used during the operation of the internal combustion engine and is heated, so as to flow outside and in contact with said heat exchanging elements to transfer heat through walls of said heat exchanging elements from said second fluid to said first fluid.
In accordance with another feature of the present invention, the system for heat recovery is proposed which has a heat exchanger including a plurality of heat exchanging elements; means for introducing a first fluid into said heat exchanging elements for heating in the first fluid, and withdrawing the heated first fluid from the heat exchanger elements; and supplying at least one second fluid which is used during the operation of the internal combustion engine and is heated, so as to flow outside and in contact with said heat exchanging elements to transfer heat through walls of said heat exchanging element from the second fluid to said first fluid.
When the method is performed and the system is designed in S accordance with the present invention, heat produced during the operation of the internal combustion engine is efficiently utilized.
In accordance with a further aspect of the present invention there is provided, a method of heat recovery for an internal combustion engine, comprising the steps of:
introducing a first fluid into at least one heat exchanging element of a heat exchanger for heating said first fluid, said heat exchanging element having a catalytic material on an outer surface thereof, supplying at least one heated second fluid which includes at least engine exhaust produced by the internal combustion engine, so as to flow through said heat exchanger, outside and in contact with said heat exchanging element coated with said catalyst material to transfer heat through said heat exchanging element from said second fluid to said first fluid, said contact of said second fluid with said catalyst causing a catalytic reaction to produce additional heat for transfer to said first fluid, withdrawing the first fluid from said heat exchanging element of said heat exchanger.
In accordance with another aspect of the present invention, there is provided an apparatus for heat recovery for an internal combustion engine, comprising:
a heat exchanger including a plurality of heat exchanging elements;
means for introducing a first fluid into at least one of said plurality of heat exchanging elements for heating said first fluid, said plurality of heat exchanging elements having a catalytic material on an outer surface thereof; means of supplying at least one second fluid which includes at least engine exhaust produced by the operation of the internal combustion engine, so as to flow through said heat exchanger, outside and in contact with said plurality of heat exchanging elements coated with said catalyst material to transfer heat through said plurality of heat exchanging elements from said second fluid to said first fluid, said contact of said second fluid with said catalyst causing a catalytic reaction to produce additional heat;
and means for withdrawing said first heated fluid from said plurality of heat exchanging elements of said heat exchanger.
The novel features which are considered as characteristic for the invention, as well as the invention itself, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a view illustrating schematically a method of and a system for heat recovery for an internal combustion engine;
Figure 2 is a view showing a heat exchanger of the inventive system;
- 4a -Figure 3 is a view showing additional components of the inventive system; and Figures 4-13 show further embodiments of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A system for heat recovery operates in accordance with an inventive heat recovery method is illustrated in Figure 1. Reference numeral 19 identifies an internal combustion engine and reference numeral 19a identifies a crankcase of the engine. A lubricant discharge line 19b extends from the engine to a heat exchanger and in particular to a heat exchanger area 3b, while a lubricant return line 19c extends from the heat exchanger area 3b back to the engine. A coolant discharge line 19g extends from the engine to the heat exchanger and an particular to the heat exchanger are 3a, while a coolant return line 191 extends from the heat exchanger are 3a to an engine radiator 19f. An exhaust gas discharge line 5 extends from the engine to the heat exchanger and in particular to a heat exchanger are 3c and an exhaust gas discharge line 8 extends from the heat exchanger area 3c to atmosphere.
The heat exchanger has a plurality of heat , exchanging elements (tubes) or a tube bundle 3. A first fluid which can be for example a cold water or a motive fluid is introduced into the heat exchanger through a first fluid supply line 1 into an interior of the tubes 3, and exits from the tubes 3 through a first fluid discharge line 4. It is then delivered to a first fluid application area 4a which can be formed for example as a turbine which drives a generator. Then, through discharge line 4b it is connected to a fluid pump 4c which pumps the first fluid through the line 1 again into the tubes of the heat exchanger 3. The heat exchanger 3 has the above-described heat exchanger areas.
The crankcase 19a is provided with a crankcase vent 23 with a vent line 23a which leads to a venturi 21, which draws the crankcase fumes into the engine exhaust pipe 5.
During the operation of the internal combustion engine the first fluid is circulated through the interior of the pipes of the heat exchanger 3 while the second fluid which is a fluid selected from the group consisting of the coolant, the lubricant, the exhaust, two of these fluids, or all three of these fluids is also supplied to the heat exchanger so as to be in contact with an outer surface of the tubes and to transfer the heat through the wall of the tubes to the first fluid inside the tubes.
The tubes in the heat exchanger area 3c can be coated with a variety of catalytic compounds which can cause some of the constituents of the gas to react with oxygen and in the process release heat. The combination of the heat from the exhaust gas and the heat released from the catalytic process is transferred through the walls of the heat exchanging elements to the first fluid inside the tubes.
As shown in Figure 2, electrically controlled valves 11,11 a, l l b, 11 c, 11 d are provided for delivery of air and/or fuel through a heat exchanger housing 3c to various heat exchange areas and to the crankcase vent 23a from the air pump and a pressurized fuel supply 17. This will dilute heavy materials within the system masking the process more efficient. The electronically controlled valves control the flow of air and/or fuel by way of signals sent by a microprocessor 15 through valve control wires 13b, 13c, 13d, 17a. This is in response to information fed to the microprocessor 15, which controls the air pump 16, from temperature sensors 12b, 12c, 12d and a gas constituent sensor 18 by way of sensor wires 14b, 14c, 14d, 18a.
Figure 3 shows ignitors 12a, 12g, 12f, 12h, which are located downstream of the valves 11 a, 11 b, 11 c, 11 d. They are activated by an ignition power source 12 after having received the signal to do so from the microprocessor 15 through the wire 12m. The microprocessor activates the ignitors 12a, 12f, 12g, 12h through ignition wires 12i, 12j, 12k, 121 in response to signal received from temperature sensors 12b, 12c, 12d and the gas constituents sensor 18, by temperature sensor wires 14b, 14c, 14d and the gas constituents wire 18a.
As mentioned above, in accordance with the present invention, a mixture of hydrocarbon fuel, such as propane, and air can be introduced into the discharge stream exiting the crankcase.
Air fuel mixture can also be effectively introduce into the stream in addition to that discussed above; in the following manner:
- directly into venturi 21 (Figure 4);
- in line 5 through a second venturi upstream of venturi 21 (Figure 5), - in line 5 through a second venturi downstream of venturi 21 (Figure 6), - in line 5 upstream of venturi 21 (Figure 7) - in line 5 downstream of venturi 21 (Figure 8);
It is also possible to introduce the fuel and air in two separate lines. A
line of fuel and a line of air may be introduced into the discharge stream in the following manners:
- directly into venturi 21 (Figure 9);
- in line 5 through a second venturi upstream of venturi 21 (Figure 10), - in line 5 through a second venturi downstream of venturi 21 (Figure 11 ), - in line 5 upstream of Figure 21 (Figure 12) - in line 5 downstream of venturi 21 (Figure 13).
_g_ It will be understood that each of the elements described above, or two or more together, may also fmd a useful application in other types of methods and constructions differing from the types described above.
While the invention has been illustrated and described as embodied in method of and system for heat recovery for an internal combustion engine, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.
_g_
Claims (20)
1. A method of heat recovery for an internal combustion engine, comprising the steps of:
introducing a first fluid into at least one heat exchanging element of a heat exchanger for heating said first fluid, said heat exchanging element having a catalytic material on an outer surface thereof, supplying at least one heated second fluid which includes at least engine exhaust produced by the internal combustion engine, so as to flow through said heat exchanger, outside and in contact with said heat exchanging element coated with said catalyst material to transfer heat through said heat exchanging element from said second fluid to said first fluid, said contact of said second fluid with said catalyst causing a catalytic reaction to produce additional heat for transfer to said first fluid, withdrawing the first fluid from said heat exchanging element of said heat exchanger.
introducing a first fluid into at least one heat exchanging element of a heat exchanger for heating said first fluid, said heat exchanging element having a catalytic material on an outer surface thereof, supplying at least one heated second fluid which includes at least engine exhaust produced by the internal combustion engine, so as to flow through said heat exchanger, outside and in contact with said heat exchanging element coated with said catalyst material to transfer heat through said heat exchanging element from said second fluid to said first fluid, said contact of said second fluid with said catalyst causing a catalytic reaction to produce additional heat for transfer to said first fluid, withdrawing the first fluid from said heat exchanging element of said heat exchanger.
2. A method as defined in claim 1, wherein supplying said at least one heated second fluid further includes supplying a coolant used during the operation of the internal combustion engine.
3. A method as defined in claim 1, wherein supplying said at least one heated second fluid further includes supplying a lubricant used during the operation of the internal combustion engine.
4. A method as defined in claim 1, further comprising using heat received by said first fluid in an application area requiring heat.
5. A method as defined in claim 1, further comprising using heat received by said first fluid in an application area requiring work energy.
6. A method as defined in claim 1, further comprising withdrawing crankcase fumes from the internal combustion engine and supplying said fumes into said engine exhaust.
7. A method as defined in claim 1, further comprising supplying at least one of air and fuel into a discharge stream from said internal combustion engine.
8. A method as defined in claim 7, wherein said at least one of air and fuel is supplied to said discharge stream through a crankcase vent line.
9. A method as defined in claim 7, wherein said at least one of air and fuel is supplied to said discharge stream through a first venturi, or an adjacent location thereof.
10. A method as defined in claim 9, wherein said adjacent location is a second venturi.
11. An apparatus for heat recovery for an internal combustion engine, comprising:
a heat exchanger including a plurality of heat exchanging elements;
means for introducing a first fluid into at least one of said plurality of heat exchanging elements for heating said first fluid, said plurality of heat exchanging elements having a catalytic material on an outer surface thereof; means of supplying at least one second fluid which includes at least engine exhaust produced by the operation of the internal combustion engine, so as to flow through said heat exchanger, outside and in contact with said plurality of heat exchanging elements coated with said catalyst material to transfer heat through said plurality of heat exchanging elements from said second fluid to said first fluid, said contact of said second fluid with said catalyst causing a catalytic reaction to produce additional heat;
and means for withdrawing said first heated fluid from said plurality of heat exchanging elements of said heat exchanger.
a heat exchanger including a plurality of heat exchanging elements;
means for introducing a first fluid into at least one of said plurality of heat exchanging elements for heating said first fluid, said plurality of heat exchanging elements having a catalytic material on an outer surface thereof; means of supplying at least one second fluid which includes at least engine exhaust produced by the operation of the internal combustion engine, so as to flow through said heat exchanger, outside and in contact with said plurality of heat exchanging elements coated with said catalyst material to transfer heat through said plurality of heat exchanging elements from said second fluid to said first fluid, said contact of said second fluid with said catalyst causing a catalytic reaction to produce additional heat;
and means for withdrawing said first heated fluid from said plurality of heat exchanging elements of said heat exchanger.
12. The apparatus as defined in claim 11, wherein said at least one heated second fluid further includes a coolant used during the operation of the internal combustion engine.
13. The apparatus as defined in claim 11, wherein said at least one heated second fluid further includes a lubricant used during the operation of the internal combustion engine.
14. The apparatus as defined in claim 11, wherein said first fluid is delivered to an application area requiring heat.
15. The apparatus as defined in claim 11, wherein said first fluid is delivered to an application area requiring work energy.
16. The apparatus as defined in claim 11, wherein crankcase fumes from the internal combustion engine are added into said engine exhaust.
17. The apparatus as defined in claim 11, further comprising supplying at least one of air and fuel into a discharge stream from said internal combustion engine.
18. The apparatus as defined in claim 17, wherein said at least one of air and fuel is supplied to said discharge stream through a crankcase vent line.
19. The apparatus as defined in claim 17, wherein said at least one of air and fuel is supplied to said discharge stream through a first venturi, or an adjacent location thereof.
20. The apparatus as defined in claim 19, wherein said adjacent location is a second venturi.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/865,711 | 2001-05-29 | ||
| US09/865,711 US20020005040A1 (en) | 2000-07-13 | 2001-05-29 | Method of and system for heat recovery for an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2361113A1 CA2361113A1 (en) | 2002-11-29 |
| CA2361113C true CA2361113C (en) | 2007-02-13 |
Family
ID=25346071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002361113A Expired - Fee Related CA2361113C (en) | 2001-05-29 | 2001-11-06 | Method and system for heat recovery for an internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2361113C (en) |
-
2001
- 2001-11-06 CA CA002361113A patent/CA2361113C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2361113A1 (en) | 2002-11-29 |
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| EEER | Examination request | ||
| MKLA | Lapsed |