CN116816563A - Methanol fuel supply system, methanol fuel vehicle and control method for methanol fuel vehicle - Google Patents
Methanol fuel supply system, methanol fuel vehicle and control method for methanol fuel vehicle Download PDFInfo
- Publication number
- CN116816563A CN116816563A CN202311100197.1A CN202311100197A CN116816563A CN 116816563 A CN116816563 A CN 116816563A CN 202311100197 A CN202311100197 A CN 202311100197A CN 116816563 A CN116816563 A CN 116816563A
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- Prior art keywords
- methanol
- methanol fuel
- heater
- supply system
- fuel supply
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 1047
- 239000000446 fuel Substances 0.000 title claims abstract description 240
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000002828 fuel tank Substances 0.000 claims abstract description 101
- 238000002347 injection Methods 0.000 claims abstract description 74
- 239000007924 injection Substances 0.000 claims abstract description 74
- 238000010438 heat treatment Methods 0.000 claims description 38
- 230000001276 controlling effect Effects 0.000 claims description 30
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
-
- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
- F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a methanol fuel supply system, a methanol fuel vehicle and a control method for the methanol fuel vehicle, wherein the methanol fuel supply system is used for supplying methanol fuel to a methanol injection assembly and comprises a secondary fuel tank, an electric pump and a first heater, wherein the secondary fuel tank, the electric pump and the methanol injection assembly are sequentially communicated, one end of the first heater is communicated with a pipeline communicated with the electric pump and the methanol injection assembly, and the other end of the first heater can be selectively communicated with or disconnected from the secondary fuel tank. The methanol fuel supply system can adjust the temperature of the methanol fuel conveyed to the methanol injection assembly, so that the atomization effect of the methanol fuel injected by the methanol injection assembly is good, the problem that the methanol fuel vehicle is difficult or even impossible to start in cold start can be effectively solved, and the usability of the methanol fuel vehicle is improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a methanol fuel supply system, a methanol fuel vehicle and a control method for the methanol fuel vehicle.
Background
With the continuous improvement of the living standard of people, the environmental protection consciousness is gradually increased, and along with the increasing shortage of petroleum resources on the earth, automobiles with various new energy sources are also generated along with the development of technologies. Among them, methanol is a renewable substance synthesized from raw materials such as coal, natural gas, wood, and garbage, and is considered as a preferred clean fuel for replacing petroleum fuels. Therefore, the methanol is widely applied in the fields of automobiles, non-road machinery, shipping, power generation, power and the like.
For methanol fuel vehicles, there is a general interest in having the advantages of low price and low emission from combustion on the engine. However, in the methanol fuel supply system in the prior art, under the low-temperature environment, the methanol fuel is directly injected through a pipeline, so that the injected methanol is poorly atomized and cannot form good mixed gas, and the engine is difficult to start or cannot start.
Disclosure of Invention
The invention aims to provide a methanol fuel supply system, a methanol fuel vehicle control method and a methanol fuel vehicle, which are used for solving the problems that in the prior art, under a low-temperature environment, the injected methanol is poor in atomization and cannot form good mixed gas due to direct injection of the methanol fuel through a pipeline, so that the engine is difficult to start or cannot start.
To achieve the purpose, the invention adopts the following technical scheme:
the methanol fuel supply system is used for supplying methanol fuel to the methanol injection component and comprises a secondary fuel tank, an electric pump and a first heater, wherein the secondary fuel tank, the electric pump and the methanol injection component are sequentially communicated, one end of the first heater is communicated with a pipeline communicated with the electric pump and the methanol injection component, and the other end of the first heater can be selectively communicated with or disconnected from the secondary fuel tank.
As a preferable mode of the methanol fuel supply system, the methanol fuel supply system further comprises a first control valve and a pressure regulating valve, wherein the pressure regulating valve is positioned on a pipeline for communicating the electric pump with the methanol injection component, the input end of the first heater is communicated with one output end of the pressure regulating valve, the input end of the first control valve is communicated with the output end of the first heater, the first control valve can control the output end of the first heater to be communicated with the auxiliary fuel tank, and the output end of the first heater can be controlled to be communicated with the pipeline for communicating the auxiliary fuel tank with the electric pump.
As a preferable mode of the above methanol fuel supply system, the methanol fuel supply system further includes a controller and a temperature sensor for monitoring a temperature of the methanol fuel outputted from the sub-fuel tank, the controller being electrically connected to the temperature sensor, the electric pump, the first heater, and the methanol injection unit.
The methanol fuel vehicle comprises a methanol injection assembly and the methanol fuel supply system, and the auxiliary fuel tank, the electric pump and the methanol injection assembly are sequentially communicated.
The control method for the methanol fuel vehicle is applied to the methanol fuel vehicle, and the control method for the methanol fuel vehicle comprises the following steps:
acquiring an initial temperature of the methanol fuel outputted from the sub-tank;
determining an operation mode of the methanol fuel supply system according to an initial temperature of the methanol fuel outputted from the sub-tank;
the working modes of the methanol fuel supply system comprise a first working mode and a second working mode; the first working mode is as follows: controlling the methanol fuel in the auxiliary fuel tank to flow through the electric pump and be delivered to the methanol injection assembly; the second working mode is as follows: controlling the secondary fuel tank, the electric pump and the first heater to form a heating loop, wherein the methanol injection assembly is kept closed;
and controlling the methanol fuel supply system to operate according to the determined working mode.
As a preferred embodiment of the control method for a methanol fuel vehicle, the specific steps of determining the operation mode of the methanol fuel supply system according to the initial temperature of the methanol fuel outputted from the sub-tank include:
judging whether the initial temperature is smaller than the minimum value of a set temperature range;
if the initial temperature is smaller than the minimum value of the set temperature range, determining that the working mode of the methanol fuel supply system is the second working mode;
and if the initial temperature is within the set temperature range, determining that the working mode of the methanol fuel supply system is the first working mode.
As a preferable mode of the control method for a methanol fuel vehicle, when determining that the operation mode of the methanol fuel supply system is the second operation mode, the control method further includes the following steps after controlling the methanol fuel supply system to operate in the second operation mode:
acquiring the temperature of the methanol fuel output from the secondary fuel tank in real time;
judging whether the temperature of the methanol fuel output by the auxiliary fuel tank reaches a first set temperature value;
switching the operation mode of the methanol fuel supply system to the first operation mode if the temperature of the methanol fuel outputted from the sub-fuel tank reaches the first set temperature value; controlling the methanol fuel supply system to operate in a first operating mode;
if the temperature of the methanol fuel output by the auxiliary fuel tank does not reach the first set temperature value, controlling the methanol fuel supply system to continue to operate in the second working mode; switching the operation mode of the methanol fuel supply system to the first operation mode until the temperature of the methanol fuel outputted from the sub fuel tank reaches the first set temperature value; controlling the methanol fuel supply system to operate in a first operating mode;
wherein the minimum value of the set temperature range is less than or equal to the first set temperature value is less than or equal to the maximum value of the set temperature range.
As a preferable scheme of the control method for the methanol fuel vehicle, the methanol injection assembly comprises a methanol rail and a plurality of injector structures, wherein the methanol rail is used for communicating the electric pump and the injector structures, and a second heater is arranged on the outer side wall of the methanol rail;
the control method for the methanol fuel vehicle further comprises the following steps:
when the methanol fuel supply system is controlled to operate in the second working mode, the second heater is synchronously controlled to be started, and the heating duration is recorded;
and determining whether to turn off the second heater according to the initial temperature and the heating duration of the second heater.
As a preferred embodiment of the control method for a methanol-fueled vehicle, the specific step of determining whether to turn off the second heater according to the initial temperature and the heating duration of the second heater includes:
acquiring a table; wherein the table is formed of an initial temperature and a set heating duration of the second heater;
according to the initial temperature, the set heating duration of the second heater is checked from the table;
comparing the heating duration with the set heating duration;
and when the heating duration is equal to the set heating duration, controlling to turn off the second heater.
As a preferable scheme of the control method for the methanol fuel vehicle, the methanol injection assembly comprises a methanol rail and a plurality of injector structures, wherein the methanol rail is used for communicating the electric pump and the injector structures, and a second heater is arranged on the outer side wall of the methanol rail;
after controlling the methanol fuel supply system to operate in the second operation mode, the method further comprises the following steps:
acquiring the temperature of the methanol fuel output from the secondary fuel tank in real time;
judging whether the temperature of the methanol fuel output by the auxiliary fuel tank is equal to a second set temperature value;
if the temperature of the methanol fuel output by the auxiliary fuel tank is equal to the second set temperature value, controlling the second heater to be started;
and when the working mode of the methanol fuel supply system is switched to the first working mode, synchronously controlling the second heater to be closed.
The invention has the beneficial effects that:
the invention aims to provide a methanol fuel supply system, a methanol fuel vehicle and a methanol fuel vehicle control method, wherein the methanol fuel supply system is used for supplying methanol fuel to a methanol injection component and comprises a secondary fuel tank, an electric pump and a first heater, wherein the secondary fuel tank, the electric pump and the methanol injection component are sequentially communicated, one end of the first heater is communicated with a pipeline communicated with the electric pump and the methanol injection component, and the other end of the first heater can be selectively communicated with or disconnected from the secondary fuel tank. Specifically, through setting up the pipeline intercommunication of one end and motor pump and methyl alcohol injection subassembly intercommunication of first heater, the other end can be selectively with vice fuel tank intercommunication or disconnection, when the temperature of the methyl alcohol fuel of being exported by vice fuel tank is less than certain value, open first heater, close methyl alcohol injection subassembly, and communicate first heater and vice fuel tank, make vice fuel tank, motor pump and first heater form the heating circuit, heat the methyl alcohol fuel in the vice fuel tank, after the methyl alcohol fuel in the vice fuel tank is heated to suitable temperature, close first heater, disconnect first heater and vice fuel tank, and open methyl alcohol injection subassembly, make the methyl alcohol fuel in the vice fuel tank carry methyl alcohol injection subassembly through the motor pump, and jet by methyl alcohol injection subassembly, it is higher to carry the temperature of methyl alcohol fuel of methyl alcohol injection subassembly this moment, atomization effect when jetting through methyl alcohol injection subassembly is good, thereby can effectively improve the methyl alcohol fuel vehicle cold start difficulty even unable problem of starting, the performance of methyl alcohol fuel vehicle has been promoted.
Drawings
FIG. 1 is a schematic diagram of a methanol fuel supply system provided in an embodiment of the present invention;
FIG. 2 is a schematic illustration of a methanol rail according to an embodiment of the present invention;
fig. 3 is a flow chart of a methanol fuel supply system provided in an embodiment of the invention.
In the figure:
1. a sub-tank; 2. an electric pump; 3. a first heater; 4. a first control valve; 5. a pressure regulating valve; 6. a temperature sensor; 7. a one-way valve; 8. a first filter;
100. a methanol injection assembly; 110. a methanol rail; 120. an ejector structure; 121. a second control valve; 122. a throttle valve; 123. a second filter; 130. a pressure sensor.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, 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 invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The present invention provides a methanol fuel supply system for supplying methanol fuel to a methanol injection module 100, as shown in fig. 1, comprising a sub-fuel tank 1, an electric pump 2 and a first heater 3, wherein the sub-fuel tank 1, the electric pump 2 and the methanol injection module 100 are sequentially communicated, one end of the first heater 3 is communicated with a pipeline in which the electric pump 2 and the methanol injection module 100 are communicated, and the other end of the first heater 3 can be selectively communicated with or disconnected from the sub-fuel tank 1. Specifically, by providing the first heater 3 with the pipe line through which the electric pump 2 and the methanol injection module 100 communicate with each other, the other end can be selectively connected to or disconnected from the sub-fuel tank 1, when the temperature of the methanol fuel outputted from the sub-fuel tank 1 is lower than a certain value, the first heater 3 is turned on, the methanol injection module 100 is turned off, and the first heater 3 is communicated with the sub-fuel tank 1, so that the sub-fuel tank 1, the electric pump 2 and the first heater 3 form a heating circuit to heat the methanol fuel in the sub-fuel tank 1, when the methanol fuel in the sub-fuel tank 1 is heated to a proper temperature, the first heater 3 is turned off, the first heater 3 is disconnected from the sub-fuel tank 1, and the methanol injection module 100 is turned on, so that the methanol fuel in the sub-fuel tank 1 is delivered to the methanol injection module 100 through the electric pump 2, and is injected by the methanol injection module 100.
Specifically, the methanol fuel supply system further includes a main fuel tank having a volume larger than that of the sub-fuel tank 1. The main fuel tank and the sub fuel tank 1 are each used for storing methanol fuel. The specific structure of the main fuel tank for delivering the methanol fuel to the auxiliary fuel tank 1 belongs to the prior art, and will not be described herein.
As shown in fig. 1, the methanol fuel supply system further includes a first control valve 4 and a pressure regulating valve 5, the pressure regulating valve 5 is located on a pipeline where the electric pump 2 and the methanol injection assembly 100 are communicated, and an input end of the first heater 3 is communicated with one output end of the pressure regulating valve 5, an input end of the first control valve 4 is communicated with an output end of the first heater 3, the first control valve 4 can control the output end of the first heater 3 to be communicated with the auxiliary fuel tank 1, and can control the output end of the first heater 3 to be communicated with the pipeline where the auxiliary fuel tank 1 and the electric pump 2 are communicated. Specifically, in the present embodiment, the first control valve 4 is a two-position three-way valve, the inlet of which communicates with the output end of the first heater 3, one of the output ends of which communicates with the sub-fuel tank 1, and the other of which communicates with the lines through which the sub-fuel tank 1 and the electric pump 2 communicate. By providing the first control valve 4, the output end of the first heater 3 is communicated with the auxiliary fuel tank 1, or the output end of the first heater 3 is communicated with a pipeline for communicating the auxiliary fuel tank 1 with the electric pump 2; by providing the pressure regulating valve 5, the pressure regulating valve 5 can regulate the pressure of the methanol fuel delivered to the methanol injection unit 100 during the process of delivering the methanol fuel in the sub-fuel tank 1 to the methanol injection unit 100 through the electric pump 2 and the pressure regulating valve 5, it can be understood that the excessive methanol fuel flows through the first heater 3 and the first control valve 4 in sequence and returns to the line of the sub-fuel tank 1 communicating with the electric pump 2, and during this process, the first heater 3 does not heat the methanol fuel; when the sub-fuel tank 1, the electric pump 2, the pressure regulating valve 5 and the first heater 3 form a heating circuit, the methanol injection assembly 100 is in a closed state in the process of heating the methanol fuel in the sub-fuel tank 1, the opening of the output end of the pressure regulating valve 5 communicated with the first heater 3 is in the maximum opening, the methanol fuel output by the electric pump 2 is heated by the first heater 3 and then flows back into the sub-fuel tank 1 through the first control valve 4, the first heater 3 stops heating until the methanol fuel in the sub-fuel tank 1 is heated to a proper temperature, the first control valve 4 disconnects the first heater 3 from the sub-fuel tank 1, and the output end of the first heater 3 is communicated with a pipeline communicated with the sub-fuel tank 1 and the electric pump 2.
Specifically, as shown in fig. 1, the methanol fuel supply system further includes a controller and a temperature sensor 6, the temperature sensor 6 is used to monitor the temperature of the methanol fuel outputted from the sub-tank 1, and the controller is electrically connected to the temperature sensor 6, the electric pump 2, the first heater 3, and the methanol injection assembly 100. Specifically, the controller is also electrically connected to the first control valve 4. The controller controls the operation of the electric pump 2, the first heater 3, the first control valve 4, and the methanol injection module 100 according to the detected temperature of the methanol fuel outputted from the sub-fuel tank 1.
Preferably, in the present embodiment, as shown in fig. 1, the temperature sensor 6 is provided on a line in which the sub-fuel tank 1 communicates with the electric pump 2.
Optionally, as shown in fig. 1, a check valve 7 is further provided on the line of the secondary fuel tank 1 communicating with the electric pump 2. The arrangement is such that the methanol fuel can be delivered only from the sub-tank 1 to the electric pump 2, avoiding the methanol fuel from flowing backwards. Specifically, in the present embodiment, one output end of the two-position three-way valve is communicated with the sub-fuel tank 1, the other output end is communicated with a pipe line through which the sub-fuel tank 1 and the electric pump 2 communicate, and the other output end is remote from the sub-fuel tank 1 with respect to the check valve 7.
Optionally, as shown in fig. 1, the methanol fuel supply system further includes a first filter 8, and the first filter 8 is capable of filtering the methanol fuel delivered from the sub-tank 1 to the methanol injection unit 100. Preferably, in the present embodiment, as shown in fig. 1, the number of the first filters 8 is two, one of which is provided on a line in which the sub-fuel tank 1 communicates with the electric pump 2, and the other of which is provided on a line in which the pressure regulating valve 5 communicates with the methanol injection unit 100.
The invention also provides a methanol fuel vehicle, which comprises a methanol injection assembly 100 as shown in fig. 1, and further comprises the methanol fuel supply system, wherein the auxiliary fuel tank 1, the electric pump 2 and the methanol injection assembly 100 are communicated in sequence. Specifically, in the present embodiment, the sub-tank 1, the check valve 7, one of the first filters 8, the electric pump 2, the pressure regulating valve 5, the other first filter 8, and the methanol injection module 100 are sequentially communicated. By adopting the methanol fuel supply system, when the vehicle starts, if the temperature of the methanol fuel output by the auxiliary fuel tank 1 is lower than a certain value, the first heater 3 is started, the methanol injection assembly 100 is closed, the first heater 3 is communicated with the auxiliary fuel tank 1, so that the auxiliary fuel tank 1, the one-way valve 7, the first filter 8, the electric pump 2, the pressure regulating valve 5, the first heater 3 and the first control valve 4 form a heating loop to heat the methanol fuel in the auxiliary fuel tank 1, when the methanol fuel in the auxiliary fuel tank 1 is heated to a proper temperature, the first heater 3 is closed, the first heater 3 is disconnected from the auxiliary fuel tank 1, the methanol injection assembly 100 is started, the methanol fuel in the auxiliary fuel tank 1 passes through the one-way valve 7, the first filter 8, the electric pump 2, the pressure regulating valve 5 and the other first filter 8 and is conveyed to the methanol injection assembly 100, and the temperature of the methanol fuel conveyed to the methanol injection assembly 100 is high, and the methanol fuel in the methanol injection assembly 100 is atomized when the methanol fuel is conveyed to the methanol injection assembly 100, so that the fuel can effectively improve the cold starting performance of the vehicle and even can not start the vehicle easily.
As shown in fig. 1 and 2, the methanol injection assembly 100 includes a methanol rail 110 and a plurality of injector structures 120, the methanol rail 110 is used for communicating the electric pump 2 and the injector structures 120, and a second heater is disposed on an outer sidewall of the methanol rail 110. Specifically, the controller is also electrically connected with the second heater and can control the second heater to work. In the present embodiment, the methanol rail 110 communicates with the output end of the first filter 8. When the vehicle starts, the methanol fuel initially output from the auxiliary fuel tank 1 flows through the check valve 7, one first filter 8, the electric pump 2, the pressure regulating valve 5, the other first filter 8 and the methanol rail 110 in sequence to reach the position of the injector structure 120, if the vehicle is cold started at this time, the temperature of the methanol fuel in the methanol rail 110 and the methanol fuel of the pipeline nearby the connecting pipe are lower, and the first heater 3 can not heat the methanol fuel rapidly and efficiently, so the second heater is arranged on the outer side wall of the methanol rail 110, and can heat the methanol fuel in the methanol rail 110 and the methanol fuel of the pipeline nearby the methanol rail 110, so that the temperature of the methanol fuel conveyed to the injector structure 120 is suitable, the atomization effect of the methanol fuel injected by the injector structure 120 can be further improved, the problem that the methanol fuel vehicle is difficult to cold start or even can not be started can be further improved, and the service performance of the methanol fuel vehicle is further improved.
Specifically, as shown in fig. 1 and 2, the injector structure 120 includes a second control valve 121 and a throttle valve 122, the methanol rail 110, the second control valve 121 and the throttle valve 122 are sequentially communicated, and the controller can control the second control valve 121 to communicate or disconnect the methanol rail 110 and the throttle valve 122. By providing the second control valve 121, the injector structure 120 is enabled to inject methane fuel or to stop injecting methane fuel, and by providing the throttle valve 122, the ejected gas can be atomized. Specifically, in the present embodiment, the second control valve 121 is an electromagnetic switch valve.
Further specifically, as shown in fig. 1 and 2, the injector structure 120 also includes a second filter 123, the second filter 123 being capable of filtering the methane fuel delivered by the methanol rail 110 to the throttle valve 122. So arranged, to further enhance the purity of the methane fuel. Preferably, in the present embodiment, the second filter 123 is provided on a line through which the methanol rail 110 and the second control valve 121 communicate.
More specifically, as shown in fig. 1, the number of injector structures 120 is plural, and the plurality of injector structures 120 are distributed at intervals along the length direction of the methanol rail 110 and each communicate with the methanol rail 110. By the arrangement, the injection efficiency of injecting methane fuel can be improved. Specifically, in the present embodiment, two methanol rails 110 are exemplarily provided, two methanol rails 110 are connected in series, and three injector structures 120 are disposed on each methanol rail 110 at intervals. It will be appreciated that the number of the methanol rails 110 may be increased or decreased according to the actual operating conditions, and the number of the injector structures 120 provided on each methanol rail 110 may be increased or decreased.
As shown in fig. 1, the methanol injection assembly 100 further includes a pressure sensor 130, wherein the pressure sensor 130 is electrically connected to the controller, and the pressure sensor 130 is configured to monitor the pressure of the methanol fuel at the methanol rail 110. Specifically, the controller controls the communication duration for the second control valve 121 to communicate the methanol rail 110 with the throttle valve 122 in accordance with the pressure of the methanol fuel at the methanol rail 110 detected by the pressure sensor 130.
The invention also provides a control method for the methanol fuel vehicle, which is used for the methanol fuel vehicle, and the control method for the methanol fuel vehicle can effectively regulate the temperature of the methanol fuel during cold start, so that the atomization effect of the methanol injection assembly 100 during injection is improved, the problem that the methanol fuel vehicle is difficult or even impossible to start during cold start is effectively solved, and the service performance of the methanol fuel vehicle is improved.
Specifically, as shown in fig. 3, the control method for a methanol-fueled vehicle includes:
s100, the initial temperature of the methanol fuel output from the sub-tank 1 is acquired.
S200, determining an operation mode of the methanol fuel supply system according to an initial temperature of the methanol fuel outputted from the sub-tank 1.
The working modes of the methanol fuel supply system comprise a first working mode and a second working mode; the first working mode is as follows: controlling the methanol fuel in the sub-tank 1 to flow through the electric pump 2 and be delivered to the methanol injection module 100; the second working mode is as follows: the control sub-tank 1, the electric pump 2 and the first heater 3 form a heating circuit, and the methanol injection assembly 100 is kept closed.
Specifically, in this embodiment, the first operation mode is: the methanol fuel in the auxiliary fuel tank 1 is controlled to flow through the one-way valve 7, one first filter 8, the electric pump 2, the pressure regulating valve 5 and the other first filter 8 in sequence and is delivered to the methanol injection assembly 100; the second working mode is as follows: the control sub-tank 1, the check valve 7, a first filter 8 thereof, the electric pump 2, the pressure regulating valve 5, the first heater 3, and the first control valve 4 form a heating circuit, and the methanol injection module 100 is kept closed.
Specifically, the specific steps of determining the operation mode of the methanol fuel supply system according to the initial temperature of the methanol fuel outputted from the sub-tank 1 include:
and judging whether the initial temperature is smaller than the minimum value of the set temperature range.
And if the initial temperature is within the set temperature range, determining the working mode of the methanol fuel supply system as a first working mode. Step S300 is performed.
S300, controlling the methanol fuel supply system to operate in a first working mode. I.e., the methanol injection assembly 100 can normally inject methanol fuel.
And if the initial temperature is smaller than the minimum value of the set temperature range, determining that the working mode of the methanol fuel supply system is a second working mode. Step S400 is performed.
S400, controlling the methanol fuel supply system to operate in a second working mode.
When the operation mode of the methanol fuel supply system is determined to be the second operation mode, after the methanol fuel supply system is controlled to operate in the second operation mode, in order to determine whether the methanol fuel is heated to the first set temperature value, the control method for the methanol fuel vehicle further includes steps S500 to S600:
s500, acquiring the temperature of the methanol fuel outputted from the sub-tank 1 in real time.
S600, it is determined whether or not the temperature of the methanol fuel outputted from the sub-tank 1 reaches a first set temperature value.
If the temperature of the methanol fuel outputted from the sub fuel tank 1 reaches a first set temperature value, switching the operation mode of the methanol fuel supply system to the first operation mode; step S300 is performed.
If the temperature of the methanol fuel outputted from the sub-fuel tank 1 does not reach the first set temperature value, controlling the methanol fuel supply system to continue to operate in the second operation mode; switching the operation mode of the methanol fuel supply system to the first operation mode until the temperature of the methanol fuel outputted from the sub-fuel tank 1 reaches a first set temperature value; step S300 is performed.
Wherein the minimum value of the set temperature range is less than or equal to the first set temperature value and less than or equal to the maximum value of the set temperature range.
Wherein the first set temperature value is an empirical value obtained by a plurality of experiments in the prior stage. The set temperature range is an empirical range value obtained by a large number of experiments in the early stage.
Therefore, by the control method for the methanol fuel vehicle, the temperature of the methanol fuel during cold start can be effectively regulated, so that the problem that the methanol fuel vehicle is difficult or even impossible to start during cold start can be effectively solved, and the usability of the methanol fuel vehicle is improved.
When the vehicle starts, the methanol fuel initially output from the auxiliary fuel tank 1 flows through the electric pump 2, the pressure regulating valve 5, the first filter 8 and the methanol rail 110 in order to reach the injector structure 120, if the vehicle is cold started at this time, the methanol fuel in the methanol rail 110 and the methanol fuel in the pipe near the pipe have low temperature, and the methanol fuel cannot be heated quickly and efficiently by the above control method for the methanol fuel vehicle, so the control method for the methanol fuel vehicle further comprises:
and when the methanol fuel supply system is controlled to operate in the second working mode, the second heater is synchronously controlled to be started, and the heating duration is recorded.
Whether to turn off the second heater is determined according to the initial temperature and the heating duration of the second heater.
Specifically, the specific step of determining whether to turn off the second heater according to the initial temperature and the heating duration of the second heater includes:
acquiring a table; wherein the table is formed of the initial temperature and the set heating time period of the second heater.
The set heating duration of the second heater is checked from the table according to the initial temperature.
The heating period is compared with the set heating period.
And when the heating duration is equal to the set heating duration, controlling to turn off the second heater.
Wherein the table is obtained from a large number of tests in the early stage.
It will be appreciated that the heating time of the second heater is much less than the operating time of the methanol fuel supply system in the second mode of operation.
By the arrangement, the temperature of the methanol fuel in the methanol rail 110 and the temperature of the methanol fuel taking over the pipeline nearby can be adjusted to be within a proper temperature range, so that the problem that the methanol fuel vehicle is difficult or even impossible to start in cold start is further improved, and the service performance of the methanol fuel vehicle is further improved.
For the problem of low temperature of the methanol fuel in the methanol rail 110 and the methanol fuel in the pipe around the pipe, another alternative specifically includes:
after controlling the methanol fuel supply system to operate in the second operation mode, the method further comprises the following steps:
the temperature of the methanol fuel output from the sub-tank 1 is acquired in real time.
It is determined whether the temperature of the methanol fuel output from the sub-tank 1 is equal to a second set temperature value.
If the temperature of the methanol fuel outputted from the sub-tank 1 is equal to the second set temperature value, the second heater is controlled to be turned on.
When the working mode of the methanol fuel supply system is switched to the first working mode, the second heater is synchronously controlled to be closed.
By the arrangement, the temperature of the methanol fuel in the methanol rail 110 and the temperature of the methanol fuel taking over the pipeline nearby can be adjusted to be within a proper temperature range, so that the problem that the methanol fuel vehicle is difficult or even impossible to start in cold start is further improved, and the service performance of the methanol fuel vehicle is further improved.
Wherein the second set temperature value is an empirical value obtained by a plurality of experiments in the prior stage.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The methanol fuel supply system is used for supplying methanol fuel to the methanol injection assembly (100), and is characterized by comprising a secondary fuel tank (1), an electric pump (2) and a first heater (3), wherein the secondary fuel tank (1), the electric pump (2) and the methanol injection assembly (100) are sequentially communicated, one end of the first heater (3) is communicated with a pipeline communicated with the electric pump (2) and the methanol injection assembly (100), and the other end of the first heater (3) can be selectively communicated with or disconnected from the secondary fuel tank (1).
2. A methanol fuel supply system according to claim 1, characterized in that the methanol fuel supply system further comprises a first control valve (4) and a pressure regulating valve (5), the pressure regulating valve (5) being located on a line communicating with the electric pump (2) and the methanol injection assembly (100), and the input of the first heater (3) being in communication with one of the output ends of the pressure regulating valve (5), the input of the first control valve (4) being in communication with the output of the first heater (3), the first control valve (4) being capable of controlling the output of the first heater (3) to be in communication with the auxiliary fuel tank (1) and the output of the first heater (3) being capable of controlling the line communicating with the auxiliary fuel tank (1) and the electric pump (2).
3. A methanol fuel supply system according to any one of claims 1-2, further comprising a controller and a temperature sensor (6), the temperature sensor (6) being adapted to monitor the temperature of the methanol fuel output by the secondary fuel tank (1), the controller being electrically connected to the temperature sensor (6), the electric pump (2), the first heater (3) and the methanol injection assembly (100).
4. Methanol fuel vehicle comprising a methanol injection assembly (100), characterized in that it further comprises a methanol fuel supply system according to any one of claims 1-3, said secondary fuel tank (1), said electric pump (2) and said methanol injection assembly (100) being in communication in sequence.
5. A control method for a methanol fuel vehicle according to claim 4, comprising:
acquiring an initial temperature of the methanol fuel outputted from the sub-tank (1);
determining an operation mode of the methanol fuel supply system according to an initial temperature of the methanol fuel outputted from the sub-fuel tank (1);
the working modes of the methanol fuel supply system comprise a first working mode and a second working mode; the first working mode is as follows: controlling the methanol fuel in the auxiliary fuel tank (1) to flow through the electric pump (2) and be delivered to the methanol injection assembly (100); the second working mode is as follows: controlling the secondary fuel tank (1), the electric pump (2) and the first heater (3) to form a heating loop, the methanol injection assembly (100) being kept closed;
and controlling the methanol fuel supply system to operate according to the determined working mode.
6. The control method for a methanol fuel vehicle according to claim 5, characterized in that the specific step of determining the operation mode of the methanol fuel supply system in accordance with the initial temperature of the methanol fuel outputted from the sub-tank (1) comprises:
judging whether the initial temperature is smaller than the minimum value of a set temperature range;
if the initial temperature is smaller than the minimum value of the set temperature range, determining that the working mode of the methanol fuel supply system is the second working mode;
and if the initial temperature is within the set temperature range, determining that the working mode of the methanol fuel supply system is the first working mode.
7. The control method for a methanol fuel vehicle according to claim 6, characterized by further comprising, after determining that the operation mode of the methanol fuel supply system is the second operation mode, controlling the methanol fuel supply system to operate in the second operation mode, the steps of:
acquiring the temperature of the methanol fuel output by the auxiliary fuel tank (1) in real time;
judging whether the temperature of the methanol fuel output by the auxiliary fuel tank (1) reaches a first set temperature value;
switching an operation mode of the methanol fuel supply system to the first operation mode if the temperature of the methanol fuel outputted from the sub-fuel tank (1) reaches the first set temperature value; controlling the methanol fuel supply system to operate in a first operating mode;
if the temperature of the methanol fuel output by the auxiliary fuel tank (1) does not reach the first set temperature value, controlling the methanol fuel supply system to continue to operate in the second working mode; switching the operation mode of the methanol fuel supply system to the first operation mode until the temperature of the methanol fuel outputted from the sub fuel tank (1) reaches the first set temperature value; controlling the methanol fuel supply system to operate in a first operating mode;
wherein the minimum value of the set temperature range is less than or equal to the first set temperature value is less than or equal to the maximum value of the set temperature range.
8. The methanol fuel vehicle control method according to any one of claims 5 to 7, characterized in that the methanol injection assembly (100) comprises a methanol rail (110) and a plurality of injector structures (120), the methanol rail (110) being used for communicating the electric pump (2) and the injector structures (120), an outer side wall of the methanol rail (110) being provided with a second heater;
the control method for the methanol fuel vehicle further comprises the following steps:
when the methanol fuel supply system is controlled to operate in the second working mode, the second heater is synchronously controlled to be started, and the heating duration is recorded;
and determining whether to turn off the second heater according to the initial temperature and the heating duration of the second heater.
9. The control method for a methanol fuel vehicle as set forth in claim 8, wherein the specific step of determining whether to turn off the second heater according to the initial temperature and the heating duration of the second heater includes:
acquiring a table; wherein the table is formed of an initial temperature and a set heating duration of the second heater;
according to the initial temperature, the set heating duration of the second heater is checked from the table;
comparing the heating duration with the set heating duration;
and when the heating duration is equal to the set heating duration, controlling to turn off the second heater.
10. The methanol fuel vehicle control method according to any one of claims 5 to 7, characterized in that the methanol injection assembly (100) comprises a methanol rail (110) and a plurality of injector structures (120), the methanol rail (110) being used for communicating the electric pump (2) and the injector structures (120), an outer side wall of the methanol rail (110) being provided with a second heater;
after controlling the methanol fuel supply system to operate in the second operation mode, the method further comprises the following steps:
acquiring the temperature of the methanol fuel output by the auxiliary fuel tank (1) in real time;
judging whether the temperature of the methanol fuel output by the auxiliary fuel tank (1) is equal to a second set temperature value;
controlling the second heater to be turned on if the temperature of the methanol fuel outputted from the sub fuel tank (1) is equal to the second set temperature value;
and when the working mode of the methanol fuel supply system is switched to the first working mode, synchronously controlling the second heater to be closed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311100197.1A CN116816563A (en) | 2023-08-30 | 2023-08-30 | Methanol fuel supply system, methanol fuel vehicle and control method for methanol fuel vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311100197.1A CN116816563A (en) | 2023-08-30 | 2023-08-30 | Methanol fuel supply system, methanol fuel vehicle and control method for methanol fuel vehicle |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05149223A (en) * | 1991-11-26 | 1993-06-15 | Fuji Heavy Ind Ltd | Start control method of ffv engine and device thereof |
| US5546920A (en) * | 1992-11-18 | 1996-08-20 | Saab Automobile Aktiebolag | Starting system for internal combustion engines which can be driven by different fuels |
| WO2010060378A1 (en) * | 2008-11-27 | 2010-06-03 | 奇瑞汽车股份有限公司 | Fuel control system for alcohol and gasoline dual-fuel engine and control method thereof |
| WO2014036761A1 (en) * | 2012-09-05 | 2014-03-13 | 安徽江淮汽车股份有限公司 | Method and system for cold-starting flexible fuel automobile |
| CN205895476U (en) * | 2016-04-08 | 2017-01-18 | 北京工业大学 | Cold starting drive of self -adaptation formula methyl alcohol internal -combustion engine |
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2023
- 2023-08-30 CN CN202311100197.1A patent/CN116816563A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05149223A (en) * | 1991-11-26 | 1993-06-15 | Fuji Heavy Ind Ltd | Start control method of ffv engine and device thereof |
| US5546920A (en) * | 1992-11-18 | 1996-08-20 | Saab Automobile Aktiebolag | Starting system for internal combustion engines which can be driven by different fuels |
| WO2010060378A1 (en) * | 2008-11-27 | 2010-06-03 | 奇瑞汽车股份有限公司 | Fuel control system for alcohol and gasoline dual-fuel engine and control method thereof |
| WO2014036761A1 (en) * | 2012-09-05 | 2014-03-13 | 安徽江淮汽车股份有限公司 | Method and system for cold-starting flexible fuel automobile |
| CN205895476U (en) * | 2016-04-08 | 2017-01-18 | 北京工业大学 | Cold starting drive of self -adaptation formula methyl alcohol internal -combustion engine |
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