US20120260624A1 - System and Method for Controlling Evaporative Emissions - Google Patents
System and Method for Controlling Evaporative Emissions Download PDFInfo
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- US20120260624A1 US20120260624A1 US13/179,373 US201113179373A US2012260624A1 US 20120260624 A1 US20120260624 A1 US 20120260624A1 US 201113179373 A US201113179373 A US 201113179373A US 2012260624 A1 US2012260624 A1 US 2012260624A1
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- Prior art keywords
- time
- period
- pump
- canisters
- intake manifold
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
- F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
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- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
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- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/089—Layout of the fuel vapour installation
Definitions
- the present invention relates generally to engine emissions and more particularly to evaporative engine emissions.
- Automotive evaporative emissions are currently regulated by governmental environmental agencies, including both the United States Environmental Protection Agency and the California Air Resources Board.
- fuel vapors may be collected into activate charcoal canisters when the automotive engine is turned off.
- the charcoal in the canisters absorbs the fuel vapor so as to store the fuel vapor in the canister and prevent it from being emitted to the atmosphere.
- the absorbed fuel vapor is then pulled from the canisters into the engine and is consumed.
- Evaporative emissions can be difficult to control if air mixes with the fuel vapor. If a significant amount of air is collected into an activated charcoal canister, for example, the air can reduce the charcoal's ability to absorb fuel vapor in the canister and thereby significantly reduce the capacity of the canister to hold fuel vapor. Consequently, a system and method is needed to collect fuel vapor into canisters while reducing the amount of air that may enter into the canisters.
- fuel vapor is allowed to accumulate in an intake manifold for a first period of time after an engine is turned off.
- a pump control module may open a vacant port and turn on a pump.
- the pump control module may run the pump for a second period of time.
- the second period of time may be determined based on the time needed to empty an estimated volume of accumulated fuel vapor from the intake manifold into one or more canisters, such as activated charcoal canisters.
- the pump control module may decrease the running time and/or speed of the pump.
- the pump control module may be calibrated to modulate or cycle the pump at a 50% duty cycle.
- the vacant port When the engine is restarted, the vacant port may be closed, the pump may be turned off, and fuel vapor stored in the canisters may be controllably consumed via a purge valve mounted to the intake manifold.
- a choke may be placed in between the vacant port and the canisters in order to reduce the number of canisters needed for a given pump size.
- FIG. 1 is a schematic diagram of a system for controlling evaporative emissions in one embodiment of the present invention.
- the present invention comprises a system and method to collect fuel vapor from engines while reducing the amount of air that is able to mix with the fuel vapor as the fuel vapor is collected.
- the present invention may be used in connection with an engine with an unconventional fuel system, such as a liquefied petroleum gas fuel system, or with engines with other types of fuel systems, including gasoline fuel systems.
- the intake manifold includes a purge valve 102 and a vacant port 105 .
- the vacant port 105 may include an intake solenoid valve 104 to open and close the vacant port 105 .
- the vacant port 105 may also connect via gas lines 110 b to one or more canisters such as a first canister 103 a and an optional second canister 103 b .
- the purge valve 102 may also connect via gas lines 110 a to the one or more canisters.
- the one or more canisters may be activated charcoal canisters or other types of canisters useful for trapping vapors.
- the one or more canisters may connect via gas lines 110 c to a pump 109 and via gas lines 110 c and gas line 110 d to a vent line 115 .
- the vent line 115 may include a canister vent valve 107 .
- the pump 109 may connect to a separate vent line 116 .
- Those of ordinary skill in the art will understand that other embodiments of the present invention may include gas lines in different arrangements from those shown in FIG. 1 .
- the pump 109 may also connect via electrical lines 114 to a pump control module 106 and a battery 113 , such as a 12 volt vehicle battery.
- the pump control module 106 may also connect via electrical lines 114 to an ignition switch 112 , an engine control unit 111 , the intake solenoid valve 104 , and the canister vent valve 107 .
- Those of ordinary skill in the art will understand that other embodiments of the present invention may include electrical lines in different arrangements from those shown in FIG. 1 .
- the first period of time is set to approximately equal to twenty (20) minutes from the time that the vehicle ignition switch is turned off. In other embodiments, the length of the first period of time may be varied based on factors such as temperature, pressure, and/or fuel vapor concentrations, as may be measured in the intake manifold 101 .
- the pump control module 106 may open the vacant port 105 , such as by opening the intake solenoid valve 104 , and turn on the pump 109 .
- the pump control module 106 may run the pump 109 for a second period of time.
- the second period of time may be determined based on factors such as the time needed to empty an estimated volume of accumulated fuel vapor from the intake manifold 101 into the one or more canisters. Such a determination may correspond to factors such as the size of the intake manifold 101 , the size of the pump 109 , the capacity of the one or more canisters 103 a and 103 b , and/or other system parameters such as temperature, pressure, the capacity of the gas lines 110 , and the system's resistance to vapor flow.
- the second period of time is set to approximately equal to two (2) minutes from the time that the pump 109 is turned on.
- the length of the second period of time may be varied based on factors such as temperature, pressure, and fuel vapor concentrations, as may be measured in the intake manifold 101 , the gas lines 110 , and/or the one or more canisters.
- pressure sensor 108 may be used to measure pressure in gas line 110 d and relative pressure in the one or more canisters.
- the pump 109 while running during the second period of time, may pull vapor from the canisters through gas lines 110 c and to vent line 116 . As a result, the pressure in the canisters will be reduced. This reduction in pressure may cause the fuel vapor that has accumulated in the intake manifold 101 to travel from the intake manifold 101 , through the vacant port 105 , and into the one or more canisters via the gas lines 110 b.
- the pump control module 106 may stop or decrease the running time and/or speed of the pump 109 . Otherwise, the pump 109 might, for example, begin to draw significant amounts of air from the intake manifold 101 into the one or more canisters. In one embodiment, the pump control module 106 may be calibrated to modulate or cycle the pump 109 at a fifty percent (50%) duty cycle after the end of the second period of time.
- the pump control module 106 may, for repeating cycles, turn off the pump 109 and close the vacant port 105 for approximately one (1) minute and then turn on the pump 109 and open the vacant port 105 for approximately one (1) minute. After the end of the second period of time, the pump 109 may continue to run at a fifty percent (50%) duty cycle until the ignition switch 112 is turned on. When the ignition switch 112 is turned on, the vacant port 105 may be closed and the pump 109 may be turned off. The fuel vapor stored in the one or more canisters may then be controllably consumed via a purge valve 102 mounted to the intake manifold 101 and the gas lines 110 a.
- a purge valve 102 mounted to the intake manifold 101 and the gas lines 110 a.
- a choke (not shown) may be placed in between the vacant port 105 and the one or more canisters in order to reduce the number of the one or more canisters needed for a pump 109 of a given size.
- the system and method may include two canisters and no choke.
- the system and method may include a choke and a single canister.
Abstract
A system and method which implements a preferred embodiment of the present invention includes a pump control module for controlling evaporative emissions of engines. In one embodiment, fuel vapor is allowed to accumulate in an intake manifold for a first period of time after an engine is turned off. After the first period of time, the pump control module may open a vacant port and turn on a pump. The pump control module may run the pump for a second period of time. The second period of time may be determined based on the time needed to empty an estimated volume of accumulated fuel vapor from the intake manifold into one or more canisters, such as activated charcoal canisters. After the second period of time, the pump control module may decrease the running time and/or speed of the pump. When the engine is restarted, the vacant port may be closed, the pump may be turned off, and fuel vapor stored in the canisters may be controllably consumed via a purge valve mounted to the intake manifold. In one embodiment, a choke may be placed in between the vacant port and the canisters in order to reduce the number of canisters needed for a given pump size.
Description
- This non-provisional patent application claims priority based upon prior U.S. Provisional Patent Application Ser. No. 61/362,480 filed Jul. 8, 2010 in the name of Martin Veinbergs entitled “System and Method for Controlling Evaporative Emissions,” the disclosure of which is incorporated herein in its entirety by reference.
- The present invention relates generally to engine emissions and more particularly to evaporative engine emissions.
- Automotive evaporative emissions are currently regulated by governmental environmental agencies, including both the United States Environmental Protection Agency and the California Air Resources Board. To reduce automotive evaporative emissions, fuel vapors may be collected into activate charcoal canisters when the automotive engine is turned off. The charcoal in the canisters absorbs the fuel vapor so as to store the fuel vapor in the canister and prevent it from being emitted to the atmosphere. When the engine is turned on, the absorbed fuel vapor is then pulled from the canisters into the engine and is consumed.
- Evaporative emissions can be difficult to control if air mixes with the fuel vapor. If a significant amount of air is collected into an activated charcoal canister, for example, the air can reduce the charcoal's ability to absorb fuel vapor in the canister and thereby significantly reduce the capacity of the canister to hold fuel vapor. Consequently, a system and method is needed to collect fuel vapor into canisters while reducing the amount of air that may enter into the canisters.
- Therefore, it can be appreciated that there is a significant need for an improved system and method for controlling evaporative emissions that can collect fuel vapor into canisters while reducing the amount of air that may enter into the canisters. Embodiments of the present invention can provide these and other advantages, as will be apparent from the following description and accompanying figure.
- In accordance with one embodiment of the present invention, fuel vapor is allowed to accumulate in an intake manifold for a first period of time after an engine is turned off. After the first period of time, a pump control module may open a vacant port and turn on a pump. The pump control module may run the pump for a second period of time. The second period of time may be determined based on the time needed to empty an estimated volume of accumulated fuel vapor from the intake manifold into one or more canisters, such as activated charcoal canisters. After the second period of time, the pump control module may decrease the running time and/or speed of the pump. In one embodiment, the pump control module may be calibrated to modulate or cycle the pump at a 50% duty cycle. When the engine is restarted, the vacant port may be closed, the pump may be turned off, and fuel vapor stored in the canisters may be controllably consumed via a purge valve mounted to the intake manifold. In one embodiment, a choke may be placed in between the vacant port and the canisters in order to reduce the number of canisters needed for a given pump size.
- For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawing, in which:
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FIG. 1 is a schematic diagram of a system for controlling evaporative emissions in one embodiment of the present invention. - In one embodiment, the present invention comprises a system and method to collect fuel vapor from engines while reducing the amount of air that is able to mix with the fuel vapor as the fuel vapor is collected. The present invention may be used in connection with an engine with an unconventional fuel system, such as a liquefied petroleum gas fuel system, or with engines with other types of fuel systems, including gasoline fuel systems.
- Reference is now made to
FIG. 1 , which is a schematic diagram of a system for controlling evaporative emissions in one embodiment of the present invention. In this embodiment, the intake manifold includes apurge valve 102 and avacant port 105. Thevacant port 105 may include anintake solenoid valve 104 to open and close thevacant port 105. Thevacant port 105 may also connect viagas lines 110 b to one or more canisters such as afirst canister 103 a and an optionalsecond canister 103 b. Thepurge valve 102 may also connect viagas lines 110 a to the one or more canisters. The one or more canisters may be activated charcoal canisters or other types of canisters useful for trapping vapors. The one or more canisters may connect viagas lines 110 c to apump 109 and viagas lines 110 c andgas line 110 d to avent line 115. Thevent line 115 may include acanister vent valve 107. Thepump 109 may connect to aseparate vent line 116. Those of ordinary skill in the art will understand that other embodiments of the present invention may include gas lines in different arrangements from those shown inFIG. 1 . - The
pump 109 may also connect viaelectrical lines 114 to apump control module 106 and abattery 113, such as a 12 volt vehicle battery. Thepump control module 106 may also connect viaelectrical lines 114 to anignition switch 112, anengine control unit 111, theintake solenoid valve 104, and thecanister vent valve 107. Those of ordinary skill in the art will understand that other embodiments of the present invention may include electrical lines in different arrangements from those shown inFIG. 1 . - In one embodiment, when the
ignition switch 112 is turned off, fuel vapor is allowed to accumulate in theintake manifold 101 for a first period of time. In one embodiment, the first period of time is set to approximately equal to twenty (20) minutes from the time that the vehicle ignition switch is turned off. In other embodiments, the length of the first period of time may be varied based on factors such as temperature, pressure, and/or fuel vapor concentrations, as may be measured in theintake manifold 101. - After the first period of time, the
pump control module 106 may open thevacant port 105, such as by opening theintake solenoid valve 104, and turn on thepump 109. Thepump control module 106 may run thepump 109 for a second period of time. The second period of time may be determined based on factors such as the time needed to empty an estimated volume of accumulated fuel vapor from theintake manifold 101 into the one or more canisters. Such a determination may correspond to factors such as the size of theintake manifold 101, the size of thepump 109, the capacity of the one ormore canisters pump 109 is turned on. In other embodiments, the length of the second period of time may be varied based on factors such as temperature, pressure, and fuel vapor concentrations, as may be measured in theintake manifold 101, the gas lines 110, and/or the one or more canisters. For example,pressure sensor 108 may be used to measure pressure ingas line 110 d and relative pressure in the one or more canisters. - The
pump 109, while running during the second period of time, may pull vapor from the canisters throughgas lines 110 c and to ventline 116. As a result, the pressure in the canisters will be reduced. This reduction in pressure may cause the fuel vapor that has accumulated in theintake manifold 101 to travel from theintake manifold 101, through thevacant port 105, and into the one or more canisters via thegas lines 110 b. - After the second period of time, or once a majority of the fuel vapor that has accumulated in the
intake manifold 101 has left theintake manifold 101, thepump control module 106 may stop or decrease the running time and/or speed of thepump 109. Otherwise, thepump 109 might, for example, begin to draw significant amounts of air from theintake manifold 101 into the one or more canisters. In one embodiment, thepump control module 106 may be calibrated to modulate or cycle thepump 109 at a fifty percent (50%) duty cycle after the end of the second period of time. For example, thepump control module 106 may, for repeating cycles, turn off thepump 109 and close thevacant port 105 for approximately one (1) minute and then turn on thepump 109 and open thevacant port 105 for approximately one (1) minute. After the end of the second period of time, thepump 109 may continue to run at a fifty percent (50%) duty cycle until theignition switch 112 is turned on. When theignition switch 112 is turned on, thevacant port 105 may be closed and thepump 109 may be turned off. The fuel vapor stored in the one or more canisters may then be controllably consumed via apurge valve 102 mounted to theintake manifold 101 and thegas lines 110 a. - In addition, a choke (not shown) may be placed in between the
vacant port 105 and the one or more canisters in order to reduce the number of the one or more canisters needed for apump 109 of a given size. In one embodiment, the system and method may include two canisters and no choke. In another embodiment, the system and method may include a choke and a single canister. - While the present system and method has been disclosed according to the preferred embodiment of the invention, those of ordinary skill in the art will understand that other embodiments have also been enabled. Even though the foregoing discussion has focused on particular embodiments, it is understood that other configurations are contemplated. In particular, even though the expressions “in one embodiment” or “in another embodiment” are used herein, these phrases are meant to generally reference embodiment possibilities and are not intended to limit the invention to those particular embodiment configurations. These terms may reference the same or different embodiments, and unless indicated otherwise, are combinable into aggregate embodiments. The terms “a”, “an” and “the” mean “one or more” unless expressly specified otherwise.
- When a single embodiment is described herein, it will be readily apparent that more than one embodiment may be used in place of a single embodiment. Similarly, where more than one embodiment is described herein, it will be readily apparent that a single embodiment may be substituted for that one device.
- In light of the wide variety of possible devices and methods for controlling evaporative engine emissions, the detailed embodiments are intended to be illustrative only and should not be taken as limiting the scope of the invention. Rather, what is claimed as the invention is all such modifications as may come within the spirit and scope of the following claims and equivalents thereto.
- None of the descriptions in this specification should be read as implying that any particular element, step or function is an essential element which must be included in the claim scope. The scope of the patented subject matter is defined only by the allowed claims and their equivalents. Unless explicitly recited, other aspects of the present invention as described in this specification do not limit the scope of the claims.
Claims (24)
1. A system for controlling evaporative engine emissions comprising:
an intake manifold including a vacant port which connects to one or more canisters,
a pump which connects to said one or more canisters, and
a pump control module configured to run said pump after a first period of time.
2. The system of claim 1 wherein the length of said first period of time is approximately twenty minutes from the time that an ignition switch is turned off.
3. The system of claim 1 wherein the length of said first period of time is varied based on one or more of the following variables measured at said intake manifold: temperature, pressure and fuel vapor concentration.
4. The system of claim 1 wherein said pump control module is configured to run said pump for a second period of time after said first period of time.
5. The system of claim 1 wherein said pump control module is configured to run said pump for a second period of time after said first period of time and the length of said second period of time approximately two minutes.
6. The system of claim 1 wherein said pump control module is configured to run said pump for a second period of time after said first period of time and the length of said second period of time is varied based on one or more of the following variables measured at said intake manifold, said one or more canisters or a gas line connecting to said one or more canisters: temperature, pressure, and fuel vapor concentration.
7. The system of claim 1 wherein said pump control module is configured to run said pump for a second period of time after said first period of time and the length of said second period of time is determined based on one or more of the following factors: the size of said intake manifold, the size of said pump, the capacity of said one or more canisters, temperature, pressure, the capacity of a gas line, and the resistance to vapor flow of a gas line.
8. The system of claim 1 wherein said pump control module is configured to run said pump for a second period of time after said first period of time and configured to run said pump at a decreased rate after said second period of time.
9. The system of claim 1 wherein said pump control module is configured to run said pump for a second period of time after said first period of time and configured to modulate or cycle said pump after said second period of time.
10. The system of claim 1 wherein said pump control module is configured to run said pump for a second period of time after said first period of time and configured to run said pump at approximately a fifty percent duty cycle after said second period of time.
11. The system of claim 1 wherein, after an ignition switch is turned on, fuel vapor stored in said one or more canisters is consumed via a purge valve mounted to said intake manifold.
12. The system of claim 1 further comprising a choke between said vacant port and said one or more canisters.
13. A method for controlling evaporative engine emissions comprising:
after a first period of time, running a pump for a second period of time wherein said pump is connected to one or more canisters and said one or more canisters are connected to a vacant port of an intake manifold.
14. The method of claim 13 , wherein the length of said first period of time is approximately twenty minutes from the time that said ignition switch is turned off.
15. The method of claim 13 wherein the length of said first period of time is varied based on one or more of the following variables measured at said intake manifold: temperature, pressure and fuel vapor concentration.
16. The method of claim 13 wherein said pump is connected to a pump control module configured to start said pump.
17. The method of claim 13 wherein the length of said second period of time approximately two minutes.
18. The method of claim 13 wherein the length of said second period of time is varied based on one or more of the following variables measured at said intake manifold, said one or more canisters or a gas line connecting to said one or more canisters: temperature, pressure, and fuel vapor concentration.
19. The method of claim 13 further comprising running said pump at a decreased rate after said second period of time.
20. The method of claim 13 further comprising modulating or cycling said pump after said second period of time.
21. The method of claim 13 further comprising running said pump at approximately a fifty percent duty cycle after said second period of time.
22. The method of claim 13 wherein, after an ignition switch is turned on, fuel vapor stored in said one or more canisters is consumed via a purge valve mounted to said intake manifold.
23. The method of claim 13 wherein a choke is located between said vacant port and said one or more canisters.
24. The method of claim 13 further comprising determining the length of said second period of time based on one or more of the following factors: the size of said intake manifold, the size of said pump, the capacity of said one or more canisters, temperature, pressure, the capacity of a gas line, and the resistance to vapor flow of a gas line.
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US13/179,373 US20120260624A1 (en) | 2010-07-08 | 2011-07-08 | System and Method for Controlling Evaporative Emissions |
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US36248010P | 2010-07-08 | 2010-07-08 | |
US13/179,373 US20120260624A1 (en) | 2010-07-08 | 2011-07-08 | System and Method for Controlling Evaporative Emissions |
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US13/179,373 Abandoned US20120260624A1 (en) | 2010-07-08 | 2011-07-08 | System and Method for Controlling Evaporative Emissions |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105569845A (en) * | 2014-10-31 | 2016-05-11 | 通用汽车环球科技运作有限责任公司 | System and method for controlling the amount of purge fluid delivered to cylinders of an engine |
US9624876B2 (en) | 2014-09-04 | 2017-04-18 | Ford Global Technologies, Llc | Methods and systems for fuel vapor metering via voltage-dependent solenoid valve on duration compensation |
US11156175B1 (en) * | 2021-01-06 | 2021-10-26 | Ford Global Technologies, Llc | Vehicle with a dual path evaporative emissions system |
Citations (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4530210A (en) * | 1981-12-25 | 1985-07-23 | Honda Giken Kogyo K.K. | Apparatus for controlling evaporated fuel in an internal combustion engine having a supercharger |
US5005550A (en) * | 1989-12-19 | 1991-04-09 | Chrysler Corporation | Canister purge for turbo engine |
US5146902A (en) * | 1991-12-02 | 1992-09-15 | Siemens Automotive Limited | Positive pressure canister purge system integrity confirmation |
US5216995A (en) * | 1991-05-20 | 1993-06-08 | Honda Giken Kogyo Kabushiki Kaisha | Evaporative fuel-purging control system and air-fuel ratio control system associated therewith for internal combustion engines |
US5275145A (en) * | 1992-12-07 | 1994-01-04 | Walbro Corporation | Vapor recovery system for motor vehicles |
US5297529A (en) * | 1993-01-27 | 1994-03-29 | Siemens Automotive Limited | Positive pressure canister purge system integrity confirmation |
US5383437A (en) * | 1992-12-23 | 1995-01-24 | Siemens Automotive Limited | Integrity confirmation of evaporative emission control system against leakage |
US5411004A (en) * | 1993-02-03 | 1995-05-02 | Siemens Automotive Limited | Positive pressure canister purge system integrity confirmation |
US5483942A (en) * | 1995-02-24 | 1996-01-16 | Siemens Electric Limited | Fuel vapor leak detection system |
US5499614A (en) * | 1994-11-03 | 1996-03-19 | Siemens Electric Limited | Means and method for operating evaporative emission system leak detection pump |
US5875765A (en) * | 1996-07-01 | 1999-03-02 | Norton; Peter | Fuel vapor source |
US5970957A (en) * | 1998-03-05 | 1999-10-26 | Ford Global Technologies, Inc. | Vapor recovery system |
US6279547B1 (en) * | 2000-05-03 | 2001-08-28 | Ford Global Technologies, Inc. | Fuel vapor emission control system employing fuel vapor tank |
US6374811B1 (en) * | 2000-10-04 | 2002-04-23 | Ford Global Technologies, Inc. | System and method for minimizing fuel evaporative emissions from an internal combustion engine |
US20020046740A1 (en) * | 2000-08-18 | 2002-04-25 | Herwig Biesinger | Method for operating an internal-combustion engine |
US6412277B2 (en) * | 2000-01-13 | 2002-07-02 | Daimlerchrysler Ag | Arrangement for producing a vacuum in a motor vehicle system |
US6526950B2 (en) * | 2000-02-09 | 2003-03-04 | Nissan Motor Co., Ltd. | Fuel vapor treatment system |
US6581580B2 (en) * | 2001-01-24 | 2003-06-24 | Ford Global Technologies, Inc. | Hydrocarbon vapor evacuation system |
US6637415B2 (en) * | 2000-11-17 | 2003-10-28 | Toyota Jidosha Kabushiki Kaisha | Evaporative fuel leakage preventing device for internal combustion engine |
US6689196B2 (en) * | 2001-04-13 | 2004-02-10 | Nippon Soken Inc. | Fuel vapor control apparatus |
US6695895B2 (en) * | 2001-05-02 | 2004-02-24 | Toyota Jidosha Kabushiki Kaisha | Fuel vapor handling apparatus and diagnostic apparatus thereof |
US6769418B1 (en) * | 2003-02-28 | 2004-08-03 | General Motors Corporation | Engine fuel system with vapor generation for engine cold starting |
US7107759B2 (en) * | 2003-07-11 | 2006-09-19 | Denso Corporation | Apparatus for reducing hydrocarbon emission of internal combustion engine |
US20070117667A1 (en) * | 2005-11-21 | 2007-05-24 | Goro Tamai | Intake manifold pressure control apparatus and method for a hybrid propulsion system |
US20070137601A1 (en) * | 2003-08-05 | 2007-06-21 | Stanglmaier Rudolf H | Improved driveability and reduced emissions during engine start-up |
US7234450B1 (en) * | 2005-04-05 | 2007-06-26 | Denso Corporation | Gas density ratio detector, gas concentration detector, and fuel vapor treatment apparatus |
US7261092B1 (en) * | 2006-04-18 | 2007-08-28 | Honda Motor Co., Ltd. | Fuel-vapor processing system |
US7267112B2 (en) * | 2004-02-02 | 2007-09-11 | Tecumseh Products Company | Evaporative emissions control system including a charcoal canister for small internal combustion engines |
US7318425B2 (en) * | 2005-04-08 | 2008-01-15 | Denso Corporation | Fuel vapor treatment apparatus |
US7784449B2 (en) * | 2007-07-18 | 2010-08-31 | Audi, Ag | Vehicle, in particular a motor vehicle with a tank ventilation system |
US8413640B2 (en) * | 2008-12-01 | 2013-04-09 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Emissions cleaning system and method for reducing emissions of internal combustion engines when the engine is switched off |
-
2011
- 2011-07-08 US US13/179,373 patent/US20120260624A1/en not_active Abandoned
Patent Citations (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4530210A (en) * | 1981-12-25 | 1985-07-23 | Honda Giken Kogyo K.K. | Apparatus for controlling evaporated fuel in an internal combustion engine having a supercharger |
US5005550A (en) * | 1989-12-19 | 1991-04-09 | Chrysler Corporation | Canister purge for turbo engine |
US5216995A (en) * | 1991-05-20 | 1993-06-08 | Honda Giken Kogyo Kabushiki Kaisha | Evaporative fuel-purging control system and air-fuel ratio control system associated therewith for internal combustion engines |
US5146902A (en) * | 1991-12-02 | 1992-09-15 | Siemens Automotive Limited | Positive pressure canister purge system integrity confirmation |
US5275145A (en) * | 1992-12-07 | 1994-01-04 | Walbro Corporation | Vapor recovery system for motor vehicles |
US5383437A (en) * | 1992-12-23 | 1995-01-24 | Siemens Automotive Limited | Integrity confirmation of evaporative emission control system against leakage |
US5297529A (en) * | 1993-01-27 | 1994-03-29 | Siemens Automotive Limited | Positive pressure canister purge system integrity confirmation |
US5411004A (en) * | 1993-02-03 | 1995-05-02 | Siemens Automotive Limited | Positive pressure canister purge system integrity confirmation |
US5499614A (en) * | 1994-11-03 | 1996-03-19 | Siemens Electric Limited | Means and method for operating evaporative emission system leak detection pump |
US5483942A (en) * | 1995-02-24 | 1996-01-16 | Siemens Electric Limited | Fuel vapor leak detection system |
US5875765A (en) * | 1996-07-01 | 1999-03-02 | Norton; Peter | Fuel vapor source |
US5970957A (en) * | 1998-03-05 | 1999-10-26 | Ford Global Technologies, Inc. | Vapor recovery system |
US6412277B2 (en) * | 2000-01-13 | 2002-07-02 | Daimlerchrysler Ag | Arrangement for producing a vacuum in a motor vehicle system |
US6526950B2 (en) * | 2000-02-09 | 2003-03-04 | Nissan Motor Co., Ltd. | Fuel vapor treatment system |
US6279547B1 (en) * | 2000-05-03 | 2001-08-28 | Ford Global Technologies, Inc. | Fuel vapor emission control system employing fuel vapor tank |
US20020046740A1 (en) * | 2000-08-18 | 2002-04-25 | Herwig Biesinger | Method for operating an internal-combustion engine |
US6374811B1 (en) * | 2000-10-04 | 2002-04-23 | Ford Global Technologies, Inc. | System and method for minimizing fuel evaporative emissions from an internal combustion engine |
US6637415B2 (en) * | 2000-11-17 | 2003-10-28 | Toyota Jidosha Kabushiki Kaisha | Evaporative fuel leakage preventing device for internal combustion engine |
US6581580B2 (en) * | 2001-01-24 | 2003-06-24 | Ford Global Technologies, Inc. | Hydrocarbon vapor evacuation system |
US6689196B2 (en) * | 2001-04-13 | 2004-02-10 | Nippon Soken Inc. | Fuel vapor control apparatus |
US6695895B2 (en) * | 2001-05-02 | 2004-02-24 | Toyota Jidosha Kabushiki Kaisha | Fuel vapor handling apparatus and diagnostic apparatus thereof |
US6769418B1 (en) * | 2003-02-28 | 2004-08-03 | General Motors Corporation | Engine fuel system with vapor generation for engine cold starting |
US7107759B2 (en) * | 2003-07-11 | 2006-09-19 | Denso Corporation | Apparatus for reducing hydrocarbon emission of internal combustion engine |
US20070137601A1 (en) * | 2003-08-05 | 2007-06-21 | Stanglmaier Rudolf H | Improved driveability and reduced emissions during engine start-up |
US7267112B2 (en) * | 2004-02-02 | 2007-09-11 | Tecumseh Products Company | Evaporative emissions control system including a charcoal canister for small internal combustion engines |
US7234450B1 (en) * | 2005-04-05 | 2007-06-26 | Denso Corporation | Gas density ratio detector, gas concentration detector, and fuel vapor treatment apparatus |
US7318425B2 (en) * | 2005-04-08 | 2008-01-15 | Denso Corporation | Fuel vapor treatment apparatus |
US20070117667A1 (en) * | 2005-11-21 | 2007-05-24 | Goro Tamai | Intake manifold pressure control apparatus and method for a hybrid propulsion system |
US7261092B1 (en) * | 2006-04-18 | 2007-08-28 | Honda Motor Co., Ltd. | Fuel-vapor processing system |
US7784449B2 (en) * | 2007-07-18 | 2010-08-31 | Audi, Ag | Vehicle, in particular a motor vehicle with a tank ventilation system |
US8413640B2 (en) * | 2008-12-01 | 2013-04-09 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Emissions cleaning system and method for reducing emissions of internal combustion engines when the engine is switched off |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9624876B2 (en) | 2014-09-04 | 2017-04-18 | Ford Global Technologies, Llc | Methods and systems for fuel vapor metering via voltage-dependent solenoid valve on duration compensation |
CN105569845A (en) * | 2014-10-31 | 2016-05-11 | 通用汽车环球科技运作有限责任公司 | System and method for controlling the amount of purge fluid delivered to cylinders of an engine |
US11156175B1 (en) * | 2021-01-06 | 2021-10-26 | Ford Global Technologies, Llc | Vehicle with a dual path evaporative emissions system |
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