CN115199445B - Vehicle fuel evaporation and discharge system and method based on condensation reflux circulation - Google Patents
Vehicle fuel evaporation and discharge system and method based on condensation reflux circulation Download PDFInfo
- Publication number
- CN115199445B CN115199445B CN202210859465.7A CN202210859465A CN115199445B CN 115199445 B CN115199445 B CN 115199445B CN 202210859465 A CN202210859465 A CN 202210859465A CN 115199445 B CN115199445 B CN 115199445B
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- valve
- fuel
- fan
- tank
- carbon tank
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- 239000000446 fuel Substances 0.000 title claims abstract description 72
- 238000009833 condensation Methods 0.000 title claims abstract description 14
- 230000005494 condensation Effects 0.000 title claims abstract description 14
- 238000010992 reflux Methods 0.000 title claims abstract description 11
- 230000008020 evaporation Effects 0.000 title claims abstract description 10
- 238000001704 evaporation Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 73
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000007664 blowing Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 26
- 239000003502 gasoline Substances 0.000 claims description 9
- 239000002828 fuel tank Substances 0.000 claims description 8
- 239000000295 fuel oil Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
-
- 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
-
- 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
- F02M2025/0863—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 with means dealing with condensed fuel or water, e.g. having a liquid trap
Abstract
The invention provides a vehicle fuel evaporation and discharge system and method based on condensation reflux circulation. The carbon tank is connected with the oil tank, a first valve and a pressure sensor are arranged on a pipeline connected with the oil tank, a second valve is arranged on a pipeline connected with the carbon tank and the condenser, a third valve is arranged on a pipeline connected with the carbon tank and the ejector, and a fourth valve is arranged on a pipeline connected with the liquid collector and the oil tank; the loop formed by the carbon tank, the ejector, the condenser and the first fan is an air blowing loop, and the loop formed by the ejector, the condenser and the second fan is an injection loop. According to the invention, the fuel in the carbon tank is blown out, so that the fuel is more reasonably utilized, and the utilization efficiency of the automobile fuel is improved.
Description
Technical Field
The invention relates to the field of evaporative emission in hybrid vehicles, in particular to a vehicle fuel evaporative emission system and method based on condensation reflux circulation.
Background
With the recent progress of economy and automobile industry, the number of automobiles using gasoline as fuel is continuously increased, meanwhile, the national formulation and execution of emission regulations are increasingly strict, the problem of evaporative emission of automobiles is increasingly prominent, the traditional automobile evaporative emission treatment method is increasingly unable to adapt to the current requirements, especially the problem of evaporative emission of hybrid automobiles, the embarrassment that the carbon tank 4 of the hybrid automobiles, which is full of fuel vapor by adsorption, cannot be treated is occurred, and the generated emission pollution is extremely serious under the basis of domestic incredible number of automobiles, especially the problem of evaporative emission of hybrid automobiles. The invention aims to solve the problem and recycle the collected fuel oil, thereby achieving the effects of reducing the atmospheric pollution and saving the energy.
The problem of evaporation and emission of gasoline in an automobile oil tank is always outstanding, which not only causes fuel loss, but also indirectly causes the generation of polluted gas such as ozone. For this problem, a proposal is generally adopted at present that a carbon tank is used for absorbing fuel vapor, and then the negative pressure in an intake manifold is utilized when the automobile is at idle speed or small load, so that the gasoline in the carbon tank is blown into an engine for combustion. However, for hybrid vehicles, the internal combustion engine operates only in the high efficiency region. When the automobile is at idle speed or small load, only the motor is used for providing power, so that the negative pressure state does not occur in the air inlet manifold of the internal combustion engine, and the gasoline adsorbed in the carbon tank cannot be blown out by utilizing the negative pressure.
At present, the mode of automobile carbon tank fuel recovery adopts is to blow the fuel that the absorption obtained into the engine and burn, carries out recovery and recycle, and when the engine is running, if the solenoid valve is opened, then under the effect of intake manifold negative pressure suction force, fresh air will get into from vapour recovery tank below, after the activated carbon, gets into the engine intake manifold of hose from the export of activated carbon tank again, sends the petrol molecule that adsorbs on the activated carbon into the engine and burns. However, this treatment does not take into account the adsorption amount of fuel in the canister.
Therefore, a technical solution for separating and recovering fuel oil in a carbon tank of a hybrid electric vehicle is needed in the prior art.
Disclosure of Invention
In view of the above problems, the present invention provides a vehicle fuel evaporative emission system based on a condensation reflux cycle, comprising:
the device comprises a carbon tank, an ejector, a condenser and a first fan which are connected end to end in sequence, wherein the carbon tank is connected with an oil tank.
The inlet of the liquid collector is connected with the liquid outlet of the condenser, and the outlet of the liquid collector is connected with the oil tank.
And the head end and the tail end of the second fan are respectively connected with the ejector and the condenser.
The loop formed by the carbon tank, the ejector, the condenser and the first fan is an air blowing loop, and the loop formed by the ejector, the condenser and the second fan is an injection loop.
The device comprises a carbon tank, a condenser, an ejector, a liquid collector, a condenser, a first valve and a pressure sensor, wherein the carbon tank is connected with the oil tank, the first valve and the pressure sensor are arranged on a pipeline connected with the oil tank, the second valve is arranged on a pipeline connected with the carbon tank and the condenser, the third valve is arranged on a pipeline connected with the ejector, and the fourth valve is arranged on a pipeline connected with the liquid collector and the oil tank.
The condenser adopts a multi-stage reducer.
The first valve, the second valve, the third valve and the fourth valve are all solenoid valves, and the opening of the first valve, the second valve, the third valve, the fourth valve, the first fan and the second fan is controlled by an electronic control system (ECU).
The bottom of the liquid collector is conical.
The invention also provides an automobile with the vehicle fuel evaporation and emission system.
The invention also provides a vehicle fuel evaporation and discharge method based on condensation reflux circulation, which comprises the following steps:
s1: opening a first valve, closing a second valve, a third valve and a fourth valve, adsorbing gasoline vapor generated in an oil tank by a carbon tank, and monitoring the pressure of the oil tank, the carbon tank and a pipeline between the oil tank and the carbon tank in real time by a pressure sensor;
s2: when the pressure value sensed by the pressure sensor is larger than a calibration value, the second valve is closed, the second valve and the third valve are opened, the fourth valve is kept closed, the first fan and the second fan are started, at the moment, the fuel in the carbon tank is blown out by the air flow generated by the first fan, the fuel in the carbon tank flows to the ejector, meanwhile, the second fan forms an ejector air flow, the fuel steam in the carbon tank is blown out, and then the ejector air flow enters a condenser to be condensed to generate a mixture of liquid fuel and gaseous fuel, wherein the liquid fuel flows into a liquid trap, the gaseous fuel flows into two paths, one path is led into an ejector loop, and the other path is led into a blowing loop;
s3: when the liquid level in the liquid collector reaches a preset height, the first fan and the second fan are closed, the second valve is kept closed, and the fourth valve is opened, so that fuel in the liquid collector flows back to the fuel tank;
s4: after the fuel oil in the liquid collector is refluxed, the second valve is closed, and the carbon tank and the fuel tank are in a closed state again; and simultaneously, opening the first valve to enable the carbon tank to continuously adsorb fuel.
Compared with the prior art, the invention has the beneficial effects that:
according to the treatment mode of the fuel in the carbon tank, when the fuel in the carbon tank reaches the storage limit, the fuel is blown out, so that the fuel is more reasonably utilized, and the utilization efficiency of the fuel of the automobile is improved.
The invention can reduce the evaporation emission of the hybrid electric vehicle, continuously process and collect the fuel in the carbon tank, and the operation of the air blowing loop has no adverse effect on the use of the hybrid electric vehicle in a parking state.
According to the invention, a blowing device is designed for the air inlet of the carbon tank in the prior art, so that the fuel vapor in the activated carbon is blown out. The carbon tank can work for a long time, so that the fuel oil steam is adsorbed for a long time, and after the carbon tank adsorbs a certain amount of steam, the blowing device is started to separate gasoline from active carbon.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of an ejector circuit in the present invention.
In the figure: the device comprises a 1-oil tank, a 2-first valve, a 3-pressure sensor, a 4-carbon tank, a 5-second valve, a 6-third valve, a 7-first fan, a 8-second fan, a 9-condenser, a 10-ejector, a 11-liquid collector and a 12-fourth valve.
Detailed Description
The invention will now be described with reference to specific examples.
As shown in fig. 1-2, a vehicle fuel evaporative emissions system based on a condensate return cycle, comprising: the carbon tank 4, the ejector 10, the condenser 9, the first fan 7, the liquid collector 11 and the second fan 8 are connected end to end in sequence. The carbon tank 4 is connected with the oil tank 1, an inlet of the liquid collector 11 is connected with a liquid outlet of the condenser 9, an outlet of the liquid collector 11 is connected with the oil tank 1, and the head end and the tail end of the second fan 8 are respectively connected with the ejector 10 and the condenser 9.
The first valve 2 and the pressure sensor 3 are arranged on a pipeline connected with the oil tank 1 through the carbon tank 4, the second valve 5 is arranged on a pipeline connected with the condenser 9 through the carbon tank 4, the third valve 6 is arranged on a pipeline connected with the ejector 10 through the carbon tank 4, and the fourth valve 12 is arranged on a pipeline connected with the oil tank 1 through the liquid collector 11.
The first valve 2, the second valve 5, the third valve 6 and the fourth valve 12 are all electromagnetic valves, and the opening of the first valve 2, the second valve 5, the third valve 6 and the fourth valve 12, the opening of the first fan 7 and the opening of the second fan 8 are all controlled by an Electronic Control Unit (ECU). The pressure sensor 3 may monitor the pressure in the tank 1, and when a pressure increase is sensed, the pressure sensor 3 transmits a pressure increase signal to the ECU, which controls the first blower 7 and the second blower 8 to be turned on, and the first valve 2 should be turned on simultaneously with the first blower 7 and the second blower 8, or before the first blower 7 and the second blower 8, to avoid a part of the gas to be blown into the tank 1.
After the ECU starts the first fan 7 and the second fan 8, the air flow in the pipeline continuously and circularly flows, and the purge gas which is blown through the carbon tank 4 and has the desorbed fuel steam is sent into the condenser without intermittent circulation, so that the purge gas is converted into liquid fuel.
The loop formed by the carbon tank 4, the ejector 10, the condenser 9 and the first fan 7 is an air blowing loop, and the loop formed by the ejector 10, the condenser 9 and the second fan 8 is an ejection loop. The injection loop is added on the basis of the blowing loop, so that the gas flow speed in front of the condenser 9 is increased, a larger pressure difference is formed in front of and behind the carbon tank 4, and the fuel oil adsorbed in the carbon tank 4 is blown out better, so that the condensation effect is enhanced.
The condenser 9 adopts a multi-stage reducing pipe, so that the blown fuel vapor can be condensed to obtain liquid gasoline. Because a single stage of the reduction tube is required to condense the fuel vapor longer, and the interior of the vehicle does not have a space environment that provides a longer conduit, the condenser 9 in this embodiment employs multiple stages of the reduction tube. The bottom of the liquid collector 11 is designed to be conical, so that a small amount of fuel oil sealing oil pipe is always reserved at the bottom of the liquid collector to play a role in sealing.
The pipelines connecting the oil tank 1, the carbon tank 4, the first fan 7, the second fan 8, the condenser 9, the liquid collector 11 and other structures are 20mm, and are used for circulating steam and refluxing liquid fuel after condensation, and the joints of the device should keep good sealing performance for safety and environmental protection.
The embodiment also provides an automobile with the vehicle fuel evaporation and emission system.
In this embodiment, the vehicle fuel evaporation and discharge method based on the condensation reflux cycle includes the following steps:
s1: normally, the first valve 2 is opened, the second valve 5, the third valve 6 and the fourth valve 12 are closed, the carbon tank 4 adsorbs gasoline vapor generated in the oil tank 1, and the pressure sensor 3 monitors the pressure of the oil tank 1, the carbon tank 4 and pipelines between the two in real time.
S2: when the pressure value sensed by the pressure sensor 3 is greater than a standard value, namely, the carbon tank 4 is saturated by adsorbing fuel vapor, the carbon tank 4 is at a high storage level, the fuel tank 1 continues to generate fuel vapor, the adsorption capacity of the carbon tank 4 is reduced, the pressure in the fuel tank 1 is in a positive pressure state relative to the atmospheric pressure, a pressure rising signal sensed by the pressure sensor 3 is transmitted to the ECU, the ECU controls the first valve 2 to be closed, the second valve 5 and the third valve 6 to be opened, the fourth valve 12 to be closed, the first fan 7 and the second fan 8 to be opened, at the moment, the air flow generated by the first fan 7 blows the fuel in the carbon tank 4, the fuel in the carbon tank 4 flows to the ejector 10, meanwhile, the second fan 8 forms an injection air flow, the fuel vapor in the carbon tank 4 is blown out, and then enters the condenser 9 to be condensed back into a liquid state, so that a mixture of liquid fuel and gaseous fuel is generated, wherein the liquid fuel flows into the liquid fuel collector 11, the condensed gaseous fuel is divided into two paths, one path is collected into an injection loop, and the other path is collected into a blowing loop. At this time, the air blowing circuit is closed, the whole system is communicated with the outside without substances, the gaseous fuel circularly flows in the pipeline space, and the liquid fuel is temporarily stored in the liquid collector 11.
S3: after the time t1, the liquid level in the liquid collector 11 reaches a preset height, that is, the amount of oil stored in the liquid collector 11 reaches a certain amount, at this time, the ECU controls the first fan 7 and the second fan 8 to be closed, the second valve 5 to be kept closed, and the fourth valve 12 to be opened, so that the fuel in the liquid collector 11 flows back to the fuel tank 1.
S4: after the time t2 has elapsed, after the fuel in the liquid trap 11 has been returned, the ECU controls the second valve 5 to be closed, and then the canister 4 and the fuel tank 1 are again in a closed state.
At the same time, the first valve 2 is opened, and the process returns to step S1, so that the canister 4 continues to adsorb fuel.
Specifically, the time t1 is 5 to 10 minutes, and t2 is 1 minute.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and it is obvious to those skilled in the art that several variations and modifications can be made without departing from the spirit of the present invention, which are all within the scope of the present invention.
Claims (5)
1. A vehicle fuel evaporative emissions system based on a condensation reflux cycle, comprising:
the device comprises a carbon tank (4), an ejector (10), a condenser (9) and a first fan (7) which are connected end to end in sequence, wherein the carbon tank (4) is connected with an oil tank (1);
the inlet of the liquid collector (11) is connected with the liquid outlet of the condenser (9), and the outlet of the liquid collector (11) is connected with the oil tank (1); and
the head end and the tail end of the second fan (8) are respectively connected with the ejector (10) and the condenser (9);
the loop formed by the carbon tank (4), the ejector (10), the condenser (9) and the first fan (7) is a blowing loop, and the loop formed by the ejector (10), the condenser (9) and the second fan (8) is an ejection loop; and is also provided with
The device comprises a carbon tank (4), a condenser (9) and an ejector (10), wherein a first valve (2) and a pressure sensor (3) are arranged on a pipeline connected with the carbon tank (4) and the oil tank (1), a second valve (5) is arranged on a pipeline connected with the carbon tank (4) and the condenser (9), a third valve (6) is arranged on a pipeline connected with the carbon tank (4) and the ejector (10), and a fourth valve (12) is arranged on a pipeline connected with the liquid collector (11) and the oil tank (1);
the first valve, the second valve, the third valve and the fourth valve are all electromagnetic valves, and the opening of the first valve, the second valve, the third valve, the fourth valve, the first fan and the second fan is controlled by an electronic control system (ECU);
the vehicle fuel evaporation and discharge method based on the condensation reflux cycle adopting the system comprises the following steps of:
s1: opening a first valve (2), closing a second valve (5), a third valve (6) and a fourth valve (12), adsorbing gasoline vapor generated in an oil tank (1) by a carbon tank (4), and monitoring the pressure of the oil tank (1), the carbon tank (4) and pipelines between the oil tank (1) and the carbon tank (4) by a pressure sensor (3) in real time;
s2: when the pressure value sensed by the pressure sensor (3) is larger than a standard value, the second valve (5) is closed, the second valve (5) and the third valve (6) are opened, the fourth valve (12) is kept closed, the first fan (7) and the second fan (8) are opened, at the moment, the fuel in the carbon tank (4) is blown out by the air flow generated by the first fan (7), meanwhile, the fuel in the carbon tank (4) flows to the ejector (10), the second fan (8) forms an ejector air flow, the fuel steam in the carbon tank (4) is blown out, then the fuel steam enters the condenser (9) to be condensed to generate a mixture of liquid fuel and gaseous fuel, wherein the liquid fuel flows into the liquid collector (11), the gaseous fuel is divided into two paths, one path is led into an ejector loop, and the other path is led into the air blowing loop;
s3: when the liquid level in the liquid collector (11) reaches a preset height, the first fan (7) and the second fan (8) are closed, the second valve (5) is kept closed, and the fourth valve (12) is opened, so that the fuel in the liquid collector (11) flows back to the fuel tank (1);
s4: after the fuel oil in the liquid collector (11) is refluxed, the second valve (5) is closed, and the carbon tank (4) and the fuel tank (1) are in a closed state again; simultaneously, the first valve (2) is opened, so that the carbon tank (4) continues to adsorb fuel.
2. Vehicle fuel evaporative emission system based on a condensation return cycle according to claim 1, characterized in that the condenser (9) employs a multi-stage reducer.
3. The vehicle fuel evaporative emission system based on the condensation reflux cycle according to claim 1, wherein the first valve (2), the second valve (5), the third valve (6) and the fourth valve (12) are all solenoid valves, and the opening of the first valve (2), the second valve (5), the third valve (6) and the fourth valve (12) and the first fan (7) and the opening of the second fan (8) are all controlled by an electronic control system (ECU).
4. Vehicle fuel evaporative emission system based on a condensation return cycle according to claim 1, characterized in that the bottom of the liquid trap (11) is conical.
5. An automobile having the vehicle fuel evaporative emissions system of any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210859465.7A CN115199445B (en) | 2022-07-21 | 2022-07-21 | Vehicle fuel evaporation and discharge system and method based on condensation reflux circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210859465.7A CN115199445B (en) | 2022-07-21 | 2022-07-21 | Vehicle fuel evaporation and discharge system and method based on condensation reflux circulation |
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| Publication Number | Publication Date |
|---|---|
| CN115199445A CN115199445A (en) | 2022-10-18 |
| CN115199445B true CN115199445B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210859465.7A Active CN115199445B (en) | 2022-07-21 | 2022-07-21 | Vehicle fuel evaporation and discharge system and method based on condensation reflux circulation |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980068178A (en) * | 1997-02-17 | 1998-10-15 | 배순훈 | Automatic purifier of car canister and control method |
| CN109458276A (en) * | 2018-12-20 | 2019-03-12 | 江苏大学 | A kind of vehicle-mounted gas recovery system for oil of hybrid vehicle and control method |
| CN114060181A (en) * | 2021-10-14 | 2022-02-18 | 江苏大学 | Vehicle-mounted oil gas evaporation condensation recovery system and control method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8245699B2 (en) * | 2009-06-08 | 2012-08-21 | Ford Global Technologies, Llc | Vehicle fuel vapor management |
| US7980228B2 (en) * | 2009-06-08 | 2011-07-19 | Ford Global Technologies, Llc | Vehicle fuel vapor management |
| US10036681B2 (en) * | 2015-07-15 | 2018-07-31 | Ford Global Technologies, Llc | Methods and system for an evaporative emissions system leak test using an external pressure source |
| US10001088B2 (en) * | 2016-02-04 | 2018-06-19 | Ford Global Technologies, Llc | Convection heating assisted engine-off natural vacuum test |
| US10047705B2 (en) * | 2016-03-14 | 2018-08-14 | Ford Global Technologies, Llc | Systems and methods for reducing vehicle evaporative emissions |
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2022
- 2022-07-21 CN CN202210859465.7A patent/CN115199445B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980068178A (en) * | 1997-02-17 | 1998-10-15 | 배순훈 | Automatic purifier of car canister and control method |
| CN109458276A (en) * | 2018-12-20 | 2019-03-12 | 江苏大学 | A kind of vehicle-mounted gas recovery system for oil of hybrid vehicle and control method |
| CN114060181A (en) * | 2021-10-14 | 2022-02-18 | 江苏大学 | Vehicle-mounted oil gas evaporation condensation recovery system and control method |
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| CN115199445A (en) | 2022-10-18 |
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