CN117588336A - Fuel evaporation control system and car - Google Patents
Fuel evaporation control system and car Download PDFInfo
- Publication number
- CN117588336A CN117588336A CN202311548122.XA CN202311548122A CN117588336A CN 117588336 A CN117588336 A CN 117588336A CN 202311548122 A CN202311548122 A CN 202311548122A CN 117588336 A CN117588336 A CN 117588336A
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- China
- Prior art keywords
- desorption
- heating
- heater
- fuel
- adsorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000446 fuel Substances 0.000 title claims abstract description 120
- 238000001704 evaporation Methods 0.000 title claims abstract description 43
- 230000008020 evaporation Effects 0.000 title claims abstract description 43
- 238000003795 desorption Methods 0.000 claims abstract description 203
- 238000010438 heat treatment Methods 0.000 claims abstract description 149
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 49
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 42
- 238000001179 sorption measurement Methods 0.000 claims description 89
- 238000001514 detection method Methods 0.000 claims description 45
- 239000002828 fuel tank Substances 0.000 claims description 38
- 238000009834 vaporization Methods 0.000 claims description 10
- 230000008016 vaporization Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 12
- 238000005192 partition Methods 0.000 description 11
- 238000005485 electric heating Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 239000000470 constituent Substances 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000003351 stiffener 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
- 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
- F02M25/0854—Details of the absorption canister
-
- 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
- F02M2025/0881—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 to heat or cool the canister
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The invention provides a fuel evaporation control system and an automobile, which comprises a carbon tank and a control device, wherein the carbon tank is provided with a desorption electric control valve and a heater, the heater can heat air entering from an atmospheric air port, the control device controls the desorption electric control valve to be conducted when an engine is started, a desorption port of the carbon tank is communicated with an engine air inlet manifold to start a desorption process, and the control device controls the heater to heat, so that the air entering from the atmospheric air port of the carbon tank is heated and then absorbed in the carbon tank to reach the desorption port, the air flow speed can be accelerated through heating, and fuel molecules absorbed on the absorption material can be volatilized more easily, thereby improving the desorption efficiency and ensuring that the desorption is more sufficient.
Description
Technical Field
The invention belongs to the technical field of automobile control systems, and particularly relates to a fuel evaporation control system and an automobile.
Background
The automobile is provided with a power system, an oil supply system for supplying oil to the power system and a fuel evaporation control system for controlling fuel vapor generated by the oil supply system and avoiding the fuel vapor from being discharged into the atmosphere. The fuel evaporation control system generally comprises a carbon tank filled with an adsorption material such as activated carbon, an adsorption pipeline for communicating the carbon tank with a fuel tank and a desorption pipeline for communicating the carbon tank with an engine intake manifold, wherein the desorption pipeline is provided with a desorption valve. The fuel vapor in the fuel tank enters the carbon tank through the adsorption pipeline, and the activated carbon in the carbon tank adsorbs the fuel vapor. When the engine is started, the desorption valve is communicated for a period of time, under the action of negative pressure in the engine, air enters the carbon tank, takes away fuel vapor adsorbed by the activated carbon and brings the fuel vapor into the air inlet manifold, so that desorption is realized.
It can be seen that the existing fuel evaporation control system only has a simpler control mode, and desorption is started for a period of time when the engine is started, however, due to the difference of conditions such as the ambient temperature of the environment in which the automobile operates, the working pressure of the fuel tank, and the like, the desorption effects of the carbon tanks of different automobiles can have a larger difference, and the carbon tanks of many automobiles cannot be fully desorbed. Under the condition that the desorption can not be fully carried out, long fuel molecules are accumulated in the carbon tank during the operation time, so that the adsorption performance of the carbon tank is seriously reduced, and overflowed fuel molecules enter the atmosphere to cause atmospheric pollution.
Disclosure of Invention
The invention aims to solve the problems, and aims to provide a fuel evaporation control system capable of effectively improving the desorption efficiency of a carbon tank and enabling the carbon tank to be fully desorbed, which adopts the following technical scheme:
the invention provides a fuel evaporation control system, which is arranged in an automobile with an engine and a fuel tank, and is characterized by comprising the following components: the carbon tank is used for adsorbing and desorbing the fuel vapor; and a control device at least for controlling the desorption process of the carbon tank, wherein the carbon tank comprises: a housing having an adsorption port communicating with the fuel tank, a desorption port communicating with an intake manifold of the engine, and an atmospheric port communicating with the outside; a desorption electromagnetic valve for communicating or blocking the desorption port with the gas-facing manifold; and the heater is used for heating the air entering from the air vent, and the control device controls the desorption electromagnetic valve to be conducted when the engine is started, so that the desorption port is communicated with the air vent, and the heater is controlled to heat.
The fuel evaporation control system provided by the invention can also have the technical characteristics that the control device comprises: a start signal detection judging section for detecting and judging whether a cold start signal of the engine is received; a heating control unit configured to control the heater to heat at a predetermined power when the start signal detection and judgment unit judges that the start signal detection and judgment unit is yes; and a desorption control unit that controls the desorption solenoid valve to be turned on when the start signal detection determination unit determines that the start signal detection determination unit is positive, thereby communicating the desorption port with the intake manifold.
The fuel evaporation control system provided by the invention can be further characterized in that the preset power keeps the heating temperature output by the heater at 80 ℃, the heating control part controls the heater to heat with the preset power for a preset time, and the desorption control part controls the desorption electromagnetic valve to stop after the electromagnetic valve is controlled to be conducted for the preset time, so that the desorption port is blocked from the air intake manifold.
The fuel evaporation control system provided by the invention can also have the technical characteristics that the automobile further comprises: an off-vehicle temperature sensor for detecting an ambient temperature outside the vehicle; the control device includes: a start signal detection judging section for detecting and judging whether a cold start signal of the engine is received; a temperature information acquisition unit that acquires the ambient temperature measured by the off-vehicle temperature sensor when the start signal detection determination unit determines that the vehicle is in the affirmative; a heating parameter calculation unit that calculates a heating parameter of the heater based on the ambient temperature and a predetermined desorption ideal temperature; a heating control unit that controls the heater to heat based on the heating parameter; and a desorption control unit which controls the desorption solenoid valve to be turned on after the heating control unit controls the heater to start heating.
The fuel evaporation control system provided by the invention can also have the technical characteristics that the control device comprises: an input display unit for a user to input current date information or season information; an information storage unit which stores heating parameters of the heater corresponding to each season; a start signal detection judging section for detecting and judging whether a cold start signal of the engine is received; a heating parameter detection and judgment unit configured to search in the information storage unit based on the date information or season information input by the user, and to judge the corresponding heating parameter; a heating control unit that controls the heater to heat based on the heating parameter; and a desorption control unit which controls the desorption solenoid valve to be turned on after the heating control unit controls the heater to start heating.
The fuel evaporation control system provided by the invention can be further characterized in that the heating parameters comprise heating power and heating time, and the desorption control part controls the desorption electromagnetic valve to be cut off after the desorption electromagnetic valve is controlled to be conducted after the heating time, so that the desorption port and the air inlet manifold are blocked.
The fuel evaporation control system provided by the invention can be further characterized in that the heating parameters comprise heating power and heating time, the desorption control part controls the desorption electromagnetic valve to be conducted after a preset first time delay after the heating control part controls the heater to start heating, so that the desorption port is communicated with the air inlet manifold, and controls the desorption electromagnetic valve to be cut off after a preset second time delay after the heating time, so that the desorption port is blocked from the air inlet manifold.
The fuel evaporation control system provided by the invention can be further characterized in that the automobile is further provided with a gas pressure sensor which is arranged in the fuel tank and used for detecting the gas pressure of the fuel vapor in the fuel tank, and the fuel evaporation control system further comprises: an adsorption pipeline connected between the fuel tank and the adsorption port; and an adsorption electromagnetic valve provided on the adsorption pipe, the control device further comprising: an air pressure information acquisition unit configured to acquire the air pressure measured by the air pressure sensor; an air pressure detection judgment unit that judges whether or not the acquired air pressure is greater than a predetermined air pressure upper limit threshold value and less than a predetermined air pressure lower limit threshold value; and an adsorption control unit that controls the adsorption solenoid valve to be turned on so that the fuel vapor flows from the fuel tank to the adsorption port along the adsorption line when the air pressure detection determination unit determines that the air pressure detection determination unit is greater than the air pressure upper limit threshold, and controls the adsorption solenoid valve to be turned off when the air pressure detection determination unit determines that the air pressure detection determination unit is less than the air pressure lower limit threshold.
The fuel evaporation control system provided by the invention can also have the technical characteristics that the control device comprises: an input display part for a user to preset desorption time; a heating control unit that controls the heater to heat at the desorption time; and a desorption control part which controls the conduction of the desorption electromagnetic valve at the desorption time so as to communicate the desorption port with the intake manifold.
The invention provides an automobile, which is characterized by comprising: an engine; a fuel tank storing fuel for supplying the fuel to the engine; and the fuel evaporation control system is used for controlling fuel vapor generated by the fuel in the fuel tank.
The actions and effects of the invention
The fuel evaporation control system and the automobile comprise the carbon tank and the control device, wherein the carbon tank is provided with the desorption electromagnetic valve and the heater, the heater can heat air entering from the air inlet, the control device controls the desorption electromagnetic valve to be conducted when the engine is started, the desorption opening of the carbon tank is communicated with the air inlet manifold, and the desorption process is started, and meanwhile, the control device controls the heater to heat, so that the air entering from the air inlet is heated and then reaches the desorption opening after passing through the adsorption material in the carbon tank, the air flow speed can be accelerated through heating, and the fuel molecules adsorbed on the adsorption material can be volatilized more easily, thereby improving the desorption efficiency and ensuring that the desorption is more sufficient.
Drawings
FIG. 1 is a schematic diagram of a fuel evaporation control system according to a first embodiment of the present invention;
FIG. 2 is a perspective view of a carbon canister in accordance with a first embodiment of the invention;
FIG. 3 is an exploded view of a carbon canister in accordance with a first embodiment of the invention;
FIG. 4 is a cross-sectional view of a carbon canister in accordance with an embodiment of the invention;
FIG. 5 is a perspective view of an end cap according to one embodiment of the invention;
FIG. 6 is a perspective view of an end cap at a different angle in accordance with one embodiment of the present invention;
FIG. 7 is a perspective view of a heater according to a first embodiment of the present invention;
FIG. 8 is an enlarged view of the inner portion of circle A of FIG. 7;
FIG. 9 is a block diagram of a control device in accordance with a first embodiment of the present invention;
fig. 10 is a control flow chart of a fuel vapor desorption process in the first embodiment of the invention;
fig. 11 is a control flow chart of the fuel vapor adsorption process in the first embodiment of the invention;
FIG. 12 is a block diagram of a control device in a second embodiment of the present invention;
fig. 13 is a control flow chart of a fuel vapor desorption process in the second embodiment of the present invention;
fig. 14 is a timing diagram of fuel vapor desorption control in the third embodiment of the present invention;
fig. 15 is a block diagram of a control device in a fourth embodiment of the present invention;
fig. 16 is a control flow chart of a fuel vapor desorption process in the fourth embodiment of the present invention;
Fig. 17 is a block diagram of a control device in a fifth embodiment of the present invention.
Reference numerals:
a fuel evaporation control system 100; a carbon tank 10; a housing case 11; cylindrical projections 1111; a partition plate 1112; an adsorption tube portion 112; an adsorption port 112a; a desorption tube portion 113; a desorption port 113a; an end cap 12; a cover portion 121; a spring sleeve 1211; a stiffener sheet 1212; a stop plate 1213; a vent hole 121a; an extension 122; a vent valve accommodating portion 123; notch 123a; a partition plate 13; an elastic member 14; a vent valve 15; a heater 16; a heater mount 161; square mounting holes 161a; a cover fitting portion 1611; a cap fitting portion 1612; an electric heating member 162; square frame 1621; a heating body 1622; a heat sink 1623; a cover 17; a cover 171; a gas tank 171a; a boss 1711; an atmospheric pipe portion 172; an atmospheric vent 172a; a suction assembly 18; a first filter member 181; a second filter 182; a third filter 183; a fourth filter 184; adsorption material 185; an adsorption line 20; an adsorption tube 21; an adsorption electromagnetic valve 22; a one-way valve 23; a desorption line 30; a first desorption tube 31; a second desorption tube 32; a desorption solenoid valve 33; a control device 90; a start signal detection judgment unit 901; a heating control unit 902; a desorption control portion 903; a barometric pressure information acquisition unit 904; an air pressure detection judgment section 905; an adsorption control unit 906; a main control section 907; a temperature information acquisition unit 908; a heating parameter calculation unit 909; a season information acquisition unit 910; an information storage unit 911; a heating parameter search determination unit 912; an input display portion 913; a fuel tank 200; an air pressure sensor 210; an intake manifold 300; a throttle valve 310.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purposes and the effects of the present invention easy to understand, the fuel evaporation control system of the present invention is specifically described below with reference to the embodiments and the accompanying drawings.
Example 1
The embodiment provides an automobile, which is provided with a power system, an oil supply system and a fuel evaporation control system. The power system comprises an engine, an air inlet manifold of the engine and the like; the fuel supply system is used for supplying fuel to the power system and comprises a fuel tank storing fuel; the fuel vapor control system is used for controlling the fuel vapor generated by the fuel in the fuel tank.
Fig. 1 is a schematic diagram of the fuel evaporation control system in the present embodiment.
As shown in fig. 1, the fuel vaporization control system 100 includes a canister 10, an adsorption line 20, a desorption line 30, and a control device 90. The carbon tank 10 is communicated with the fuel tank 200 through the adsorption pipeline 20 and is communicated with the air inlet manifold 300 of the engine through the desorption pipeline 30, and fuel vapor generated by fuel in the fuel tank 200 can be adsorbed through the carbon tank 10 and the adsorption pipeline 20; the fuel vapor adsorbed in the canister 10 can be desorbed by the canister 10 and the desorption line 30, and the desorbed fuel vapor can be introduced into the engine cylinder via the intake manifold 300 for use. The control device 90 is used for controlling the adsorption process and the desorption process of the fuel vapor.
Fig. 2 is a perspective view of the canister in the present embodiment, fig. 3 is a structural exploded view of the canister in the present embodiment, and fig. 4 is a sectional view of the canister in the present embodiment.
As shown in fig. 2 to 4, the carbon canister 10 includes a housing case 11, an end cap 12, a partition 13, an elastic member 14, a vent valve 15, a heater 16, a cover 17, and an adsorption assembly 18. Wherein the housing shell 11, the end cap 12 and the cover 17 can be combined to form a complete housing with an adsorption port, a desorption port and an atmospheric port.
The main body portion of the housing 11 has a substantially square tubular shape, and its axial cross section has a rounded rectangular shape, and its cross section dimension gradually increases from one end to the other end in the axial direction. One axial end of the housing 11 is a housing open end, and the other end is provided with an adsorption tube portion 112 and a desorption tube portion 113. The adsorption tube portion 112 and the desorption tube portion 113 are all in a circular tube shape, and the axial directions of the adsorption tube portion 112 and the desorption tube portion 113 are consistent with the axial direction of the shell main body portion 111, wherein the pipe diameter of the desorption tube portion 113 is smaller than that of the adsorption tube portion 112. The adsorption port 112a is provided at the outer end of the adsorption tube portion 112, and the desorption port 113a is provided at the outer end of the desorption tube portion 113.
The housing 11 further has a fixing portion 114 for mounting, including a plurality of fixing plates 1141, each of the fixing plates 1141 having a fixing hole formed therein, and the carbon tank 10 can be fixed at a corresponding mounting position in the engine compartment of the automobile by a corresponding fastener.
Further, as shown in fig. 3, a plurality of cylindrical projections 1111 are provided on the inner bottom of the housing case 11 in a matrix arrangement, the cylindrical projections 1111 being identical in projection height and extending along the length direction of the case main body part 111, the diameter of the cylindrical projections 1111 being smaller than the interval between the adjacent two cylindrical projections 1111. The cylindrical projections 1111 arranged in a matrix allow the fuel vapor entering from the adsorption holes 112a to have a larger contact area with the filler in the housing case 11, thereby improving the adsorption efficiency. A partition plate 1112 is further formed on the inner bottom of the housing case 11 to partition the adsorption hole 112a from the desorption hole 113a so that the fuel vapor flowing in through the desorption hole 113a can sufficiently react with the adsorption material inside the housing case 11 without directly flowing out from the adjacent adsorption hole 112 a. In this embodiment, the partition plate 1112 divides the inner bottom portion into two parts, respectively, wherein the area of the inner bottom portion on the desorption hole 113a side is smaller.
The end cap 12 is fitted to the open end of the housing case 11, and can be fitted to the open end of the housing case 11.
Fig. 5 is a perspective view of the end cap in the present embodiment, and fig. 6 is a perspective view of the end cap in the present embodiment at different angles.
As shown in fig. 5 and 6, the end cap 12 includes a cap portion 121, an extension 122, and a vent valve receiving portion 123.
The cover 121 is rounded square in shape and mates with the open end of the housing 11 for fitting over the open end of the housing 11. The middle part of the cover 121 has a circular through vent hole 121a, and an elastic member sleeve 1211 and a plurality of reinforcing rib pieces 1212 are provided on the inner top surface of the cover 121. The elastic member sleeve 1211 is cylindrical, extends from the edge of the vent hole 121a in the height direction of the cover 121, and has an extension length smaller than the height of the cover 121.
The extension 122 extends from the upper end of the cover 121, the extension 122 is substantially square cylindrical, a circular through hole is formed in the middle of one side wall of the extension 122, and an end of the extension 122 remote from the cover 121 forms an end cap opening end. The upper surface of the cover 121 is provided with a plurality of limiting plates 1213 having a trapezoid outer contour, the height direction of each limiting plate 1213 is substantially perpendicular to the upper surface of the cover 121, and the height of each limiting plate 1213 is the same and smaller than the height of the extension 122.
The vent valve accommodating portion 123 is cylindrical, and has one end connected to a circular through hole in one side wall of the extension portion 122, and communicates with the outside, and the other end is located inside the extension portion 122. The side wall of the axial middle part of the vent valve accommodating part 123 is provided with an arc-shaped strip-shaped notch 123a, and the notch 123a faces the vent hole 121a on the cover part 121.
The partition 13 is fitted into the opening end of the housing case 11, the partition 13 has a net structure, has a plurality of strip-shaped ventilation holes and fan-shaped ventilation holes penetrating in the thickness direction thereof, and has an annular groove for mounting a spring in the middle of one surface in the thickness direction of the partition 13.
The elastic member 14 is a spring, and is sleeved on the elastic member sleeve 1211 of the end cover 12, one end of the elastic member 14 is abutted against the inner top surface of the end cover 12, and the other end of the elastic member is embedded in the annular groove 13a on the partition plate 13 and abutted against the bottom of the annular groove. As shown in fig. 4, the separator 13 can be pressed into the housing 11 by a spring, thereby freely compensating for the loosening gap of the carbon powder and keeping the carbon powder compact.
The main body portion of the vent valve 15 is substantially cylindrical and is disposed in the vent valve receiving portion 123 of the end cap 12, and is mainly used to close the vent passage of the canister 10 during OBD detection, so that the fuel vapor control system of the automobile is in a closed state for detection. In this embodiment, the vent valve 15 is a CVS valve.
The heater 16 is used for heating the air entering from the air vent in the desorption process so as to improve the desorption efficiency and the desorption effect.
Fig. 7 is a perspective view of the heater in the present embodiment, and fig. 8 is an enlarged view of the inner portion of the circle a in fig. 7.
As shown in fig. 7 and 8, the heater 16 includes a heater mount 161 and a plurality of electric heating members 162.
The heater mount 161 includes an end cap fitting portion 1611 and a cover fitting portion 1612. The cap engaging portion 1611 includes a rectangular parallelepiped and two rectangular parallelepiped bosses provided on both sides of the rectangular parallelepiped, the outer dimensions of which are matched with the inner circle dimensions of the extension portion 122 of the cap 12, and the height of the cap engaging portion 1611 is larger than the distance between the end portions of the plurality of stopper plates 1213 on the cap 12 and the edge portions of the extension portion 122 (the distance in the height direction of the cap 12), so that the cap engaging portion 1611 can be inserted into the extension portion 122 of the cap 12 with its outer end surfaces abutting against the end portions of the plurality of stopper plates 1213, respectively. The cap fitting portion 1612 is substantially rectangular parallelepiped and is provided at one end of the cap fitting portion 1611 in the height direction, and the length and width of the cap fitting portion 1612 are larger than those of the cap fitting portion 1611, so that a collar is formed at one end of the heater mount 161. The cover fitting portion 1612 has an outer dimension that matches the cover 17 and can be fitted into the cover 17.
The heater mount 161 has a square mounting hole 161a penetrating in a thickness direction thereof, and a plurality of electric heating members 162 are sequentially arranged and mounted in close proximity to each other in the square mounting hole 161a, and a length direction of each electric heating member is perpendicular to the arrangement direction, and the thickness direction coincides with a height direction of the heater mount 161. In this embodiment, three electric heating members 162 are incorporated in total.
That is, when the cover 17 is mounted on the end cap 12, both ends of the heater 16 are respectively embedded in the end cap opening end of the end cap 12 and the cover 17, and respectively abut against the plurality of stopper plates 1213 of the upper surface of the end cap 12 and the inner top surface of the cover 17, thereby fixing the heater 16.
Each of the electric heating parts 162 includes a square frame 1621, a heat generating body 1622, and a plurality of heat radiating fins 1623. Wherein, the heating body 1623 is in a square column shape and is connected in the square frame 1621, the plurality of radiating fins 1623 are respectively connected between one side of the heating body 1623 and one side of the corresponding square frame 1621, and the plurality of radiating fins 1623 on the same side are orderly arranged in a Z shape, and a triangular through hole is formed between two adjacent radiating fins 1623 and one side of the heating body 1623 or one side of the square frame 1621.
The casing of the heating element 1623 is made of aluminum, and a plurality of PTC (Positive Temperature Coefficient ) ceramic heating plates are provided inside the aluminum casing and filled with a sealing material. In this embodiment, the rated voltage of the electric heating member 162 is 12V.
The cover 17 includes a cover body 171 and an atmospheric air pipe portion 172. The cover 171 may be regarded as a rounded square cover, and the middle part of the top surface of the cover 171 forms a protruding part 1711 protruding further towards the outside, and the protruding part 1711 is in a strip shape, so that the middle part in the cover 171 forms a strip-shaped gas groove 171a. The atmospheric air pipe portion 172 is substantially circular pipe-shaped, is provided in the middle of the boss 1711 of the cover 171, communicates with the bottom of the air groove 171a, and the atmospheric air port 172a is provided at the outer end of the atmospheric air pipe portion 172. The pipe diameter of the atmospheric pipe portion 172 is smaller than the length and width of the gas groove 171a, and the gas groove 171a allows the air introduced from the atmospheric pipe portion 172 to have a larger contact area with the adsorbent, thereby accelerating the reaction rate.
In the present embodiment, the extension length of the gas groove 171a is slightly smaller than the width of the cover 171, and the plurality of electric heating members 162 of the heater 16 completely cover the notch of the gas groove 171 a. Thus, air entering through the vent passes through the electrical heating element 162.
As shown in fig. 2 and 3, the adsorption assembly 18 includes a first filter element 181, a second filter element 182, a third filter element 183, a fourth filter element 184, and an adsorbent 185.
The first filter member 181 is a sponge, and is disposed at the inner bottom of the housing 11 and located at one side of the adsorption hole 112 a. The second filter 182 is a nonwoven fabric, and is disposed at the bottom of the housing 11 and located at the desorption hole 113a side. The third filter 183 is a sponge, and is disposed at the open end of the housing case 11. The fourth filter 184 is a nonwoven fabric and is disposed within the elastomeric sleeve 1211 of the end cap 12 for filtering air entering from the through-air holes.
The adsorbent 185 is carbon powder, has high adsorptivity, can adsorb a large amount of gases, organic matters and inorganic matters, and can also well adsorb fuel molecules. The adsorption material 185 is filled in the shell main body 111 and between the first filter element 181, the second filter element 182 and the third filter element 183, and the first to third filter elements are also used for matching with the accommodating shell 11 and the partition plate 13 to block and limit the carbon powder and avoid the leakage thereof.
The adsorption line 20 includes an adsorption pipe 21, an adsorption solenoid valve 22 provided on the adsorption pipe 21, and a check valve 23. Both ends of the adsorption tube 21 are respectively communicated with an interface on the fuel tank 200 and an adsorption port 112a of the canister 10. When the adsorption electromagnetic valve 22 is conducted, the fuel vapor in the fuel tank 200 can reach the adsorption port through the adsorption pipe 21; when the adsorption solenoid valve 22 is closed, the fuel tank 200 is blocked from the adsorption port, and the fuel vapor remains in the fuel tank 200. The check valve 23 prevents the fuel vapor from flowing back.
The desorption line 30 includes a first desorption tube 31, a second desorption tube 32, and a desorption solenoid valve 33. The first desorption pipe 31 and the second desorption pipe 32 are communicated with the desorption port 172a of the carbon tank 10 at one end, and the other end is communicated with the intake manifold 300, wherein the other end of the second desorption pipe 32 is positioned at the throttle valve 310 of the intake manifold 300. The desorption solenoid valve 33 is provided at a connection position where the first and second desorption pipes 31, 32 are connected to the desorption port 113a of the canister 10, for controlling communication or blocking of the desorption port 113a with the intake manifold 300. When the desorption solenoid valve 33 is turned on, the desorption process is performed, the desorption port 113a of the carbon tank 10 is communicated with the intake manifold 300 of the engine, air enters from the air vent 172a under the action of negative pressure in the engine, part of fuel vapor adsorbed by carbon powder is taken away, and the air and the fuel vapor enter the intake manifold 300 together, and then enter the engine cylinder. When the desorption solenoid valve 33 is closed, the desorption port 113a is blocked from the intake manifold.
Further, a pressure sensor 210 is provided above the fuel tank 200, and a detection end portion thereof is located in the fuel tank 200 for detecting the pressure of fuel vapor above the fuel stored in the fuel tank 200 in real time. In the present embodiment, the air pressure sensor 210 is a fuel vapor pressure sensor.
The control device 90 may be integrated into an Electronic Control Unit (ECU) of the vehicle, or may be a separate device and communicatively connected to the ECU.
Fig. 9 is a block diagram of the control device in the present embodiment.
As shown in fig. 9, the control device 90 includes a start signal detection determination unit 901, a heating control unit 902, a desorption control unit 903, an air pressure information acquisition unit 904, an air pressure detection determination unit 905, an adsorption control unit 906, and a total control unit 907.
Wherein the start signal detection judgment part 901 is used for detecting and judging whether a cold start signal of the automobile engine is received, and the signal can be obtained from the ECU.
When the start signal detection and judgment unit 901 judges that the engine cold start signal is received, the heating control unit 902 controls the heater 16 to start heating. In this embodiment, the heating control portion 902 controls the heater 16 to heat at a predetermined heating power for a predetermined period of time, and the heating temperature output from the heater 16 is 80 ℃.
When the start signal detection and judgment part 901 judges that a cold start signal of the engine is received, the desorption control part 903 controls the desorption electromagnetic valve 33 to be conducted (opened) so that the air vent 172a is communicated with the desorption port 113a, and under the action of negative pressure in the engine, air enters from the air vent 172a to take away fuel vapor adsorbed by carbon powder and start a desorption process. The desorption control portion 903 also controls the desorption solenoid valve 33 to be closed (closed) after the above-described predetermined period of time to block the air passage port 172a from the desorption port 113a, that is, to stop the desorption process also when the heating is stopped.
The air pressure information acquisition unit 904 acquires a pressure signal of the fuel vapor in the fuel tank 200 measured by the air pressure sensor 210, and converts the pressure signal into a corresponding air pressure value, and the pressure signal is acquired from the ECU.
The air pressure detection determination section 905 is configured to determine whether the air pressure value acquired by the air pressure information acquisition section 904 is greater than a predetermined air pressure upper limit threshold value and less than a predetermined air pressure lower limit threshold value.
When the air pressure detection and judgment section 905 judges that the air pressure value is greater than the air pressure upper limit threshold value, the adsorption control section 906 controls the adsorption electromagnetic valve 22 to be turned on so that the fuel tank 200 and the adsorbable opening 112a are in one-way communication, and fuel vapor can enter the canister 10 through the adsorption pipe 21 to start the adsorption process. The adsorption control unit 906 also controls the adsorption solenoid valve 22 to close and block the fuel tank 200 from the adsorbable opening 112a when the air pressure detection determination unit 905 determines that the air pressure value is less than the air pressure lower limit threshold value, thereby stopping the adsorption process.
The main control unit 907 controls the operations of the above-described functional units.
Fig. 10 is a control flow chart of the fuel vapor desorption process in the present embodiment.
As shown in fig. 10, the control flow of the fuel vapor desorption process by the fuel vapor control system 100 includes the following steps:
in step S1-1, the start signal detection and determination unit 901 determines whether or not a cold start signal of the automobile engine is received, and if not, continues the detection.
In step S1-2, when the determination in step S1-1 is yes, the heating control unit 902 controls the heater 16 to heat at a predetermined power.
In step S1-3, when the determination in step S1-1 is yes, the desorption control unit 903 controls the desorption solenoid valve 33 to be turned on, and starts the desorption process.
And S1-4, waiting for a preset time.
In step S1-5, the heating control unit 902 controls the heater 16 to stop heating.
In step S1-6, the desorption control portion 903 controls the desorption solenoid valve 33 to be shut off, thereby stopping the desorption process.
Fig. 11 is a control flow chart of the fuel vapor adsorption process in the present embodiment.
As shown in fig. 11, the control flow of the fuel vapor adsorption process by the fuel vapor control system 100 includes the following steps:
in step S2-1, the air pressure information acquisition unit 904 acquires the air pressure value of the fuel vapor in the fuel tank 200 measured by the air pressure sensor 210.
In step S2-2, the air pressure detection/determination unit 905 determines whether or not the acquired air pressure value is greater than a predetermined air pressure upper limit threshold value or less than a predetermined air pressure lower limit threshold value, and if it is determined that the air pressure value is not greater than the predetermined air pressure upper limit threshold value (i.e., the air pressure value is between the two threshold values), returns to step S2-1, and waits for the next air pressure value to be acquired.
In step S2-3, when it is determined in step S2-2 that the air pressure value is greater than the air pressure upper limit threshold value, the adsorption control unit 906 controls the adsorption solenoid valve 22 to be turned on, and starts the adsorption process.
In step S2-4, when it is determined in step S2-2 that the air pressure value is smaller than the air pressure lower limit threshold value, the adsorption control unit 906 controls the adsorption solenoid valve 22 to be turned off, and stops the adsorption process.
Operation and Effect of embodiment one
According to the fuel evaporation control system provided by the embodiment, the fuel evaporation control system comprises the carbon tank and the control device, wherein the carbon tank is provided with the desorption electromagnetic valve and the heater, the heater can heat air entering from the air inlet, the control device controls the desorption electromagnetic valve to be conducted when the engine is started, the desorption opening of the carbon tank is communicated with the engine air inlet manifold, the desorption process is started, and meanwhile, the control device controls the heater to heat, so that in the desorption process, the air entering from the air inlet is heated, and then passes through the adsorption material in the carbon tank to reach the desorption opening, and through heating, the air flow speed can be accelerated, and the adsorbed fuel molecules on the adsorption material can be volatilized more easily, so that the desorption efficiency is improved, and the desorption is more sufficient.
In the embodiment, when the control device detects a cold start signal of the engine, the control device controls the heater to start heating, controls the desorption electromagnetic valve to be conducted and start the desorption process, and controls the heater to stop heating and controls the desorption electromagnetic valve to stop the desorption process after a preset time, so that air entering from the air inlet can be heated in the whole desorption process, and the heating is stopped in time when the desorption process is finished, and the energy saving purpose can be achieved.
In the embodiment, the heater is an electric heater with an aluminum shell and a PTC ceramic heating plate, has the advantages of small thermal resistance, high heat exchange efficiency, automatic constant temperature, electricity saving and the like, has very good safety performance, and can not generate the phenomenon of high surface Wen Fagong like an electric heating tube type heater under any application condition, thereby avoiding damaging other nearby parts or causing potential safety hazards such as fire hazard. In the alternative, the heater can therefore also be heated up all the time after the start of the motor vehicle engine, so that the control scheme is simpler.
In the embodiment, the control device further controls the adsorption process according to the air pressure of the fuel vapor in the fuel tank, and controls the corresponding adsorption electromagnetic valve to be conducted when the air pressure exceeds a preset threshold value, so that the adsorption process is started, and the higher the working pressure of the fuel tank is, the slower the fuel evaporation speed is, so that the aim of reducing the fuel evaporation emission can be achieved through the adsorption control mode. And the method is also convenient for setting different thresholds according to fuel tank parameters, required fuel evaporation emission and the like, and realizes corresponding adsorption control effects.
< example two >
The present embodiment provides a fuel evaporation control system and an automobile, and in the present embodiment, the same reference numerals are given to the same constituent elements as those in the first embodiment, and the corresponding description is omitted.
The difference between the first embodiment and the second embodiment is that the control device of the present embodiment is different.
Fig. 12 is a block diagram of the control device in the present embodiment.
As shown in fig. 12, the control device 90 of the present embodiment further includes a temperature information acquisition unit 908 and a heating parameter calculation unit 909.
The temperature information acquisition unit 908 is configured to acquire the real-time ambient temperature outside the vehicle, which is measured by an outside-vehicle temperature sensor of the vehicle, when the start signal detection and determination unit 901 determines that the cold start signal of the engine is received.
The automobile is provided with an air conditioning system, wherein the air conditioning system comprises an in-automobile temperature sensor and an out-automobile temperature sensor, and the ECU controls the vehicle-mounted air conditioner according to the in-automobile temperature measured by the in-automobile temperature sensor in real time, the out-automobile temperature measured by the out-automobile temperature sensor in real time, the temperature set by a user and the like. The real-time measured outside vehicle environment temperature can also be obtained from the ECU.
The heating parameter calculation unit 909 calculates the heating parameters of the heater 16, including the heating power and the heating period, based on the ambient temperature acquired by the temperature information acquisition unit 908 and the predetermined desorption ideal temperature. Specifically, the heating power may be calculated from the initial heating power and the maintenance temperature power. The initial heating power and the maintenance temperature power may be calculated based on the measured difference between the ambient temperature and the set desorption ideal temperature (target temperature), the specific heat capacity of air, the density of air, the flow rate of predetermined air entering from the air inlet, the heat dissipation amount at the target temperature, and the like. The heating power may be the maximum value of the initial heating power and the maintenance temperature power, and the heating power may be further corrected by a corresponding coefficient.
The heating control unit 902 controls the heater 16 based on the heating power and the heating time period calculated by the heating parameter calculation unit 909, that is, controls the heater 16 to heat at the heating rate, and controls the heater 16 to stop heating after the heating time period.
The adsorption control portion 906 controls the desorption solenoid valve 33 to be turned off after the above heating period after controlling the desorption solenoid valve 33 to be turned on, thereby stopping the desorption process.
Fig. 13 is a control flow chart of the fuel vapor desorption process in the present embodiment.
As shown in fig. 13, compared with the first embodiment, the control flow of the present embodiment further includes:
in step S1-1a, when it is determined in step S1-1 that the cold start signal is received, the temperature information acquisition unit 908 acquires the ambient temperature measured by the outside-vehicle temperature sensor.
In step S1-1b, the heating parameter calculation unit 909 calculates the heating power and the heating period of the heater 16 from the ambient temperature and the predetermined desorption ideal temperature.
In step S1-2, the heating control unit 902 controls the heater 16 to perform heating with the calculated heating power.
In step S1-4, the calculated heating period is waited for.
In this embodiment, other structures and methods are the same as those in the first embodiment, and thus the description will not be repeated.
The actions and effects of the second embodiment
According to the fuel evaporation control system and the automobile provided by the embodiment, on the basis of the action and the effect of the first embodiment, because the preset power control heater is not adopted, the heating parameters of the heater are calculated according to the environmental temperature measured in real time, more accurate control can be realized, and the heater can be heated to the target temperature more quickly when the environmental temperature is low, so that the desorption effect is ensured; the energy consumption of the heater can be reduced when the ambient temperature is high, and the energy saving purpose is achieved while the desorption effect is ensured.
Example III
The present embodiment provides a fuel evaporation control system and an automobile, and in the present embodiment, the same reference numerals are given to the same constituent elements as those in the first embodiment, and the corresponding description is omitted.
The difference between the embodiments is that the specific control mode of the control device of the present embodiment is different from that of the embodiments.
Fig. 14 is a timing diagram of fuel vapor desorption control in the present embodiment.
As shown in fig. 14, in the present embodiment, after the heating parameter calculation section 909 calculates the heating parameter, the heating control section 902 controls the heater 16 to start heating with the heating parameter for the heating period T. A predetermined first delay time t after the heating control portion 902 controls the heater 16 to start heating 1 Then, the desorption control unit 903 controls the desorption solenoid valve 33 to be turned on, and starts the desorption process.
After that, after the heating period T, the heating control portion 902 controls the heater 16 to stop heating. A predetermined second delay time t after the heating control portion 902 controls the heater 16 to stop heating 2 Then, the desorption control unit 903 controls the desorption solenoid valve 33 to stop, and stops the desorption process.
That is, the heater 16 is started to heat a period of time in advance before the desorption process starts; after the heater 16 stops heating, desorption is performed for a while by using the residual heat of the heater 16.
In this embodiment, other structures and methods are the same as those in the second embodiment, and thus the description thereof will not be repeated.
In addition, the control method of the present embodiment may be combined with the first embodiment, that is, the heater 16 is controlled with a predetermined power, so that the heater 16 is heated in advance, and desorption is performed for a period of time by using the residual heat after the heating is stopped.
Effects and effects of embodiment III
According to the fuel evaporation control system and the automobile provided by the embodiment, on the basis of the actions and effects of the embodiment two, the heater starts heating in advance for a period of time before the desorption process starts, so that the heater can reach the target temperature or the temperature closer to the target temperature when the desorption process starts, the desorption effect is better, and the period of poor desorption effect due to the fact that the temperature of the heater is still lower in the early stage of the desorption process can be avoided. Further, because the desorption is carried out for a period of time again by utilizing the residual temperature of the heater, the temperature of the heater is still kept high at the moment, so that the desorption effect can be still ensured, and the aim of saving energy can be achieved.
Example IV
The present embodiment provides a fuel evaporation control system and an automobile, and in the present embodiment, the same reference numerals are given to the same constituent elements as those in the first embodiment, and the corresponding description is omitted.
The difference between the first embodiment and the second embodiment is that the control device of the present embodiment is different.
Fig. 15 is a block diagram of the control device in the present embodiment.
As shown in fig. 15, the control device 90 of the present embodiment further includes a season information acquisition unit 910, an information storage unit 911, and a heating parameter search determination unit 912.
The season information acquisition unit 910 acquires the current date from the ECU, and acquires corresponding season information from the current date.
The information storage unit 911 stores heating parameters of the heater 16 corresponding to each season, and also includes heating power and heating time period. The stored heating parameters may be calculated in advance based on historical data such as average temperatures of seasons in a certain region.
The heating parameter search determination unit 912 searches the information storage unit 911 based on the season information acquired by the season information acquisition unit 910, and determines the corresponding heating parameter.
After the heating parameter search determination unit 912 determines the corresponding heating parameter, the heating control unit 902 controls the heater to perform heating with the heating parameter.
Fig. 16 is a control flow chart of the fuel vapor desorption process in the present embodiment.
As shown in fig. 16, compared with the first embodiment, the control flow of the present embodiment further includes:
in step S1-1c, when the start signal detection and determination unit 901 determines that the cold start signal of the engine is received, the season information acquisition unit 910 acquires date information from the ECU and acquires corresponding season information.
In step S1-1d, the heating parameter search determination unit 912 searches the information storage unit 911 based on the season information, and determines a corresponding heating parameter including heating power and heating time period.
In step S1-2, the heating control unit 902 controls the heater 16 to perform heating with the determined heating parameters.
In step S1-4, the above heating period is waited.
In this embodiment, other structures and methods are the same as those in the first embodiment, and thus the description will not be repeated.
The fourth embodiment of the invention
According to the fuel evaporation control system and the automobile provided by the embodiment, on the basis of the action and the effect of the first embodiment, the fuel evaporation control system and the automobile are based on the season information
< example five >
The present embodiment provides a fuel evaporation control system and an automobile, and in the present embodiment, the same reference numerals are given to the same constituent elements as those in the first embodiment, and the corresponding description is omitted.
The difference between the first embodiment and the second embodiment is that the control device of the present embodiment is different.
Fig. 17 is a block diagram of the control device in the present embodiment.
As shown in fig. 17, the control device of the present embodiment further includes an input display portion 913 for allowing a user to set the desorption time in advance.
The heating control unit 902 controls the heater 16 to perform heating at a predetermined heating power and heating time at the desorption time set by the user.
The desorption control portion 903 controls the desorption solenoid valve 33 to be turned on at a desorption time set by a user, starts a desorption process, and controls the desorption solenoid valve 33 to be turned off after a predetermined heating time.
In this embodiment, other structures and methods are the same as those in the first embodiment, and thus the description will not be repeated.
In addition, the methods of the second to fourth embodiments may be combined with the present embodiment, that is, desorption is started at the desorption time designated by the user, and the heater is controlled according to the ambient temperature measured in real time, or the heater is controlled according to the obtained season information.
Fifth embodiment of the invention
According to the fuel evaporation control system and the automobile provided by the embodiment, on the basis of the action and effect of the first embodiment, the user can preset the desorption time through the input display part, so that the desorption time can be flexibly arranged in other time periods and the carbon tank can be kept in a better working state.
The above examples are only for illustrating the specific embodiments of the present invention, and the present invention is not limited to the description of the above examples, it should be understood by those skilled in the art that the present invention is not limited by the above examples, the above examples and the description are merely illustrative of the principles of the present invention, and various changes and modifications can be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A fuel vaporization control system provided in an automobile having an engine and a fuel tank, comprising:
the carbon tank is used for adsorbing and desorbing the fuel vapor; and
a control device at least used for controlling the desorption process of the carbon tank,
wherein, the carbon tank includes:
a housing having an adsorption port communicating with the fuel tank, a desorption port communicating with an intake manifold of the engine, and an atmospheric port communicating with the outside;
a desorption electromagnetic valve for communicating or blocking the desorption port with the intake manifold; and
A heater for heating the air entering from the air vent,
the control device controls the desorption electromagnetic valve to be conducted when the engine is started, so that the desorption port is communicated with the air inlet manifold, and the heater is controlled to heat.
2. The fuel vaporization control system of claim 1, wherein:
wherein the control device includes:
a start signal detection judging section for detecting and judging whether a cold start signal of the engine is received;
a heating control unit configured to control the heater to heat at a predetermined power when the start signal detection and judgment unit judges that the start signal detection and judgment unit is yes; and
a desorption control unit configured to, when the start signal detection determination unit determines that the start signal detection determination unit is positive, and controlling the conduction of the desorption electromagnetic valve so as to communicate the desorption port with the intake manifold.
3. The fuel vaporization control system of claim 2, wherein:
wherein the predetermined power is such that the heating temperature of the heater output is maintained at 80 c,
the heating control portion controls the heater to heat at the predetermined power for a predetermined period of time,
the desorption control part controls the desorption electromagnetic valve to be closed after controlling the desorption electromagnetic valve to be closed after the predetermined time length, so that the desorption port and the air inlet manifold are blocked.
4. The fuel vaporization control system of claim 1, wherein:
wherein, the car still has:
an off-vehicle temperature sensor for detecting an ambient temperature outside the vehicle;
the control device includes:
a start signal detection judging section for detecting and judging whether a cold start signal of the engine is received;
a temperature information acquisition unit that acquires the ambient temperature measured by the off-vehicle temperature sensor when the start signal detection determination unit determines that the vehicle is in the affirmative;
a heating parameter calculation unit that calculates a heating parameter of the heater based on the ambient temperature and a predetermined desorption ideal temperature;
a heating control unit that controls the heater to heat based on the heating parameter; and
and the desorption control part controls the conduction of the desorption electromagnetic valve after the heater control part controls the heater to start heating.
5. The fuel vaporization control system of claim 1, wherein:
wherein the control device includes:
a season information acquisition unit for acquiring date information from an electronic control unit of the automobile and acquiring corresponding season information according to the date information;
An information storage unit which stores heating parameters of the heater corresponding to each season;
a start signal detection judging section for detecting and judging whether a cold start signal of the engine is received;
a heating parameter search determination unit configured to search in the information storage unit based on the acquired season information, and determine the corresponding heating parameter;
a heating control unit that controls the heater to heat based on the heating parameter; and
and the desorption control part controls the conduction of the desorption electromagnetic valve after the heater control part controls the heater to start heating.
6. The fuel vaporization control system according to claim 4 or 5, characterized in that:
wherein the heating parameters comprise heating power and heating time,
the desorption control part controls the desorption electromagnetic valve to be cut off after the heating time after controlling the desorption electromagnetic valve to be conducted, so that the desorption port and the air inlet manifold are blocked.
7. The fuel vaporization control system according to claim 4 or 5, characterized in that:
wherein the heating parameters comprise heating power and heating time,
The desorption control part controls the desorption electromagnetic valve to be conducted after a preset first time delay after the heater control part controls the heater to start heating, so that the desorption port is communicated with the atmospheric air port, and controls the desorption electromagnetic valve to be cut off after a preset second time delay after the heating time length, so that the desorption port is blocked from the air inlet manifold.
8. The fuel vaporization control system according to any one of claims 2 to 5, characterized in that:
wherein the automobile is also provided with a gas pressure sensor which is arranged in the fuel tank and is used for detecting the gas pressure of the fuel vapor in the fuel tank,
the fuel evaporation control system further includes:
an adsorption pipeline connected between the fuel tank and the adsorption port; and
an adsorption electromagnetic valve arranged on the adsorption pipeline,
the control device further includes:
an air pressure information acquisition unit configured to acquire the air pressure measured by the air pressure sensor;
an air pressure detection judgment unit that judges whether or not the acquired air pressure is greater than a predetermined air pressure upper limit threshold value and less than a predetermined air pressure lower limit threshold value; and
And an adsorption control unit that controls the adsorption solenoid valve to be turned on so that the fuel vapor flows from the fuel tank to the adsorption port along the adsorption line when the air pressure detection determination unit determines that the air pressure detection determination unit is greater than the air pressure upper limit threshold, and controls the adsorption solenoid valve to be turned off when the air pressure detection determination unit determines that the air pressure detection determination unit is less than the air pressure lower limit threshold.
9. The fuel vaporization control system of claim 1, wherein:
wherein the control device includes:
an input display part for a user to preset desorption time;
a heating control unit that controls the heater to heat at the desorption time; and
and the desorption control part is used for controlling the conduction of the desorption electromagnetic valve at the desorption time so as to communicate the desorption port with the intake manifold.
10. An automobile, comprising:
an engine;
a fuel tank storing fuel for supplying the fuel to the engine; and
a fuel evaporation control system for controlling fuel vapor generated by the fuel in the fuel tank,
wherein the fuel evaporation control system is the fuel evaporation control system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311548122.XA CN117588336A (en) | 2023-11-20 | 2023-11-20 | Fuel evaporation control system and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311548122.XA CN117588336A (en) | 2023-11-20 | 2023-11-20 | Fuel evaporation control system and car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117588336A true CN117588336A (en) | 2024-02-23 |
Family
ID=89916018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311548122.XA Pending CN117588336A (en) | 2023-11-20 | 2023-11-20 | Fuel evaporation control system and car |
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| Country | Link |
|---|---|
| CN (1) | CN117588336A (en) |
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2023
- 2023-11-20 CN CN202311548122.XA patent/CN117588336A/en active Pending
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