CN114893328A - Extended range type light truck fuel evaporation system and refueling control carbon tank desorption method - Google Patents
Extended range type light truck fuel evaporation system and refueling control carbon tank desorption method Download PDFInfo
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- CN114893328A CN114893328A CN202210568639.4A CN202210568639A CN114893328A CN 114893328 A CN114893328 A CN 114893328A CN 202210568639 A CN202210568639 A CN 202210568639A CN 114893328 A CN114893328 A CN 114893328A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention discloses an extended range type light truck fuel evaporation system and a refueling control carbon tank desorption method, which are accurate and efficient by judging whether a refueling event is finished by utilizing the vehicle speed, and simultaneously, the refueling amount recognition function is added, so that the desorption requirement of a carbon tank after refueling can be met, the risk of escape of refueling steam to the atmosphere is avoided, the desorption frequency of the carbon tank can be optimized, the energy is saved, and the extended range type light truck fuel evaporation system has the advantages of accuracy, high efficiency, safety, reliability, energy conservation and environmental protection, and customer complaints are synchronously reduced. The main hardware related by the invention is a set of highly integrated high-pressure fuel evaporation control system, so that the requirement on the mounting point of a chassis frame is reduced, no components such as a passenger car refueling small door, a refueling small door switching mechanism, a switch position sensor and the like are needed, a refueling cover is added, the chassis arrangement space is saved, the customer satisfaction is improved, and the modular design realizes good universality of a vehicle type platform and can save investment and development cost.
Description
Technical Field
The invention relates to the technical field of extended range type light truck fuel evaporation control, in particular to an extended range type light truck fuel evaporation system and a refueling control carbon tank desorption method.
Background
The new energy automobile can reduce fuel consumption in the using process and effectively reduce carbon emission, and the new energy automobile is a future development trend of automobiles. The hybrid electric vehicle has the advantages of both a pure electric vehicle and a traditional diesel locomotive, and is the leading strength of the development of new energy vehicles in a short period. Among the hybrid power system architectures, the extended range type (series hybrid architecture) has the advantages of simple layout, pure electric drive all the time, excellent driving performance, power responsiveness, fuel economy and long endurance mileage, and is particularly suitable for the field of light trucks. The national six emission grade extended range gasoline vehicle usually adopts a high-pressure fuel evaporation control system (NICRO system), and because the high pressure exists in a fuel tank of a high-pressure fuel tank for a long time, the high-pressure fuel tank needs to be decompressed firstly and then filled with fuel. The passenger car field detects oil tank pressure through the pressure sensor in the high-pressure fuel tank, if after the pressure release high-pressure fuel tank pressure is less than certain threshold value, open the electronic little door of refueling on the panel beating on the automobile body by automobile body controller BCM control, then the manual work just can open the filler cap and refuel, has filled oily back, and the manual work closes electronic little door of refueling, refuels the closed notice automobile body controller BCM of the position switch sensor on the little door and refuels and accomplish, and engine control module ECU closes the oil tank isolation valve at last. However, the extended range light truck has no small filler door and position switch sensor, only the filler cap, and the engine control module ECU cannot ensure that the filler cap is opened under the condition of low pressure in the high-pressure fuel tank, so that the risk of oil liquid spraying of the filler cap opened in a high-pressure state exists, the completion of oil filling cannot be identified, and the tank isolation valve cannot be closed in time. After the extended range light truck is filled with oil, fuel steam displaced by oil in the high-pressure fuel tank is completely adsorbed in the carbon tank, and the carbon tank cannot be fully desorbed because the refueling cannot be identified, so that the risk that the fuel steam escapes to the atmosphere is easily generated. In addition, the engine of the extended range light truck generally does not work, and does not have desorption amount completely, or works under the most economic working condition, the vacuum degree generated by an air inlet manifold is low, so that the desorption amount of a carbon tank is insufficient, and the risk that fuel steam escapes to the atmosphere after the carbon tank accumulates for a long time can exist. The vehicle body of the extended-range light truck type non-passenger vehicle, the high-pressure fuel tank, the fuel tank isolating valve, the carbon tank, the inflating pump, the carbon tank ash filter, the pressure sensor, the oil filling pipe and other parts need to be arranged on the second type chassis, and the problems of insufficient installation points of the second type chassis and serious waste of the arrangement space exist.
Disclosure of Invention
The invention aims to solve the problems and provides a range-extended light truck fuel evaporation system and a refueling control carbon tank desorption method, which can be used for preventing the range-extended light truck from opening a fuel filler cover before a high-pressure fuel tank is decompressed to a certain safety threshold value before refueling, identifying that refueling operation is finished and then closing a fuel tank isolating valve for sealing after refueling, realizing accurate carbon tank desorption after refueling according to actual refueling amount and solving the problem of risk of accumulated escape of fuel steam to the atmosphere due to insufficient desorption amount of the carbon tank for a long time.
A method for controlling desorption of a carbon tank by refueling an extended range light truck fuel evaporation system comprises the following steps
S1, a cab issues an oiling instruction;
s2, detecting whether the vehicle is under high pressure by an engine control module ECU: if the whole vehicle is not under high pressure, the VCU of the vehicle controller sends a refueling forbidding signal to a vehicle instrument, and the vehicle instrument displays that the vehicle is not flamed out and refueling is forbidden; if the high voltage is applied, the VCU of the vehicle controller is awakened by the hard wire, meanwhile, the VCU of the vehicle controller is attracted by the main relay to awaken the ECU of the engine control module and continuously sends the refueling request signal to the ECU of the engine control module and the instrument of the whole vehicle until the VCU of the vehicle controller is attracted by the main relay to awaken the EMS of the engine management system and the flow fault or end of the refueling request signal to the EMS of the engine management system and the instrument of the whole vehicle, and the instrument of the whole vehicle records the current oil quantity value V 1 The ECU controls the oil tank isolation valve to open and release pressure;
s3, detecting an internal pressure signal of the oil tank by an engine control module ECU, starting timing for 10 seconds, and giving a prompt to a vehicle instrument according to the current pressure of the high-pressure fuel tank;
s4, detecting the speed of the vehicle and judging the duration time of the refueling process by the VCU of the vehicle controller; after oiling is finished, timing by a VCU (vehicle control unit) and entering step S5 when the vehicle speed is more than or equal to 5 km/h; when the vehicle speed is less than 5km/h, the vehicle control unit VCU continues to carry out manual oiling when judging that the duration of the oiling process is below 15 minutes; when the vehicle speed is less than 5km/h, the vehicle control unit VCU judges that the duration time of the refueling process is more than 15 minutes, and then the step S5 is executed;
s5, measuring the oil mass value V after refueling by the whole vehicle instrument 2 And the whole vehicle meter calculates the currently added oil quantity value V f And will V f The value of the voltage is sent to a vehicle control unit VCU and an engine control module ECU;
s6, the VCU of the whole vehicle controller and the ECU of the engine control module determine the currently added oil mass value V of the whole vehicle instrument f A value of (d); the currently added oil quantity value V f If the value is greater than 5L, the vehicle control unit VCU starts the engine to execute a specific carbon tank desorption program, and step S7 is executed; the currently added oil quantity value V f When the value of the oil tank is less than or equal to 5L, the engine control module ECU controls to close an oil tank isolation valve, a vehicle control unit VCU detects a power supply gear, the power supply gear is an ON gear and is not processed, the power supply gear is an OFF gear and disconnects a main relay, and the oiling process is finished;
s7, adding the oil quantity value V at present f The value of the alarm oil quantity is larger than 5L, the VCU of the vehicle controller reads the current oil quantity signal of the vehicle instrument and compares the current oil quantity signal with the alarm oil quantity of 5L; when the alarm oil quantity reaches or exceeds the alarm oil quantity warning line 5L, starting a special desorption program of the carbon tank; step S8 is executed if the alarm oil quantity alarm line 5L is not reached;
s8, comparing a pressure sensor signal acquired by an engine control module ECU with warning pressure P1; when the pressure of the high-pressure fuel tank reaches or exceeds the warning pressure P1, starting a special desorption program of the carbon tank; step S9 is executed without reaching the guard pressure P1 of the high-pressure fuel tank; the warning pressure P1 is the opening pressure of a mechanical safety valve of the oil tank isolating valve;
s9, calculating the steam overflow amount of the accumulated oil tank; and when the steam overflow quantity S of the accumulated oil tank is less than or equal to 70 percent of the adsorption working capacity of the carbon tank, the engine works normally, and when the steam overflow quantity S of the accumulated oil tank is more than 70 percent of the adsorption working capacity of the carbon tank, a special desorption program of the carbon tank is started.
Specifically, in step S3, the prompt given by the vehicle instrument of the current high-pressure fuel tank pressure includes: displaying a prompt that the high-pressure fuel tank is releasing pressure, and after 10 seconds, if the pressure of the high-pressure fuel tank is more than 2kpa, reporting a fuel tank pressure release fault by an engine control module ECU and displaying the high-pressure fuel tank pressure release fault on a whole vehicle instrument, and requiring maintenance; if the pressure of the high-pressure fuel tank is less than or equal to 2kpa, the whole vehicle instrument displays that pressure relief is finished and refueling is required, and the fuel filler cap can be opened for manual refueling.
Specifically, the oil amount value V added in the step S6 f Oil quantity value V after refueling 2 With the current oil quantity value V 1 The difference is the currently added oil quantity value, and V is satisfied f =V 2 -V 1 。
Specifically, in step S9, the vapor spillage of the accumulated fuel tank satisfies the following formula:
S=N·B
in the above formula: s represents the steam overflow amount of the accumulated oil tank;
n represents the accumulated opening times of the vehicle-mounted self-diagnosis system OBD for detecting the oil tank isolating valve;
b represents the maximum value of the tank isolation valve opening for oil vapor escaping from the tank as measured by the test.
Specifically, after the carbon tank special desorption program is started, the whole vehicle instrument displays the working state of the carbon tank, and the carbon tank desorption operation is continuously carried out before the desorption flow rate does not reach the flow threshold value of 500 BV; when the desorption flow reaches the flow threshold value of 500BV, the engine resumes normal operation, and the whole vehicle instrument is closed to display.
In order to solve the problem that the installation point and the arrangement space of the components of the extended range type light truck high-pressure fuel evaporation control system are insufficient, the high-pressure fuel tank, the carbon tank, the inflating pump, the carbon tank ash filter, the pressure sensor, the oil filling pipe and the oil filling port cover are integrated into a whole module, and the components are installed on a frame through a left high-pressure fuel tank support arm bracket and a right high-pressure fuel tank support arm bracket. The carbon tank, the inflating pump and the carbon tank ash filter are ingeniously arranged on a bracket which is shaped like a Chinese character 'ji' and is higher than the upper surface of the high-pressure fuel tank on a bracket arm of the right high-pressure fuel tank through a bracket, the pressure sensor is integrated on an oil pump flange and is arranged on the high-pressure fuel tank together with the oil pump through a locking ring, and the oil filling pipe and the oil filling port cover are integrated with the high-pressure fuel tank module through an oil filling pipe mounting bracket which is screwed at the bottom of the bracket arm of the left high-pressure fuel tank and extends upwards.
The invention also provides a light truck extended range type light truck fuel evaporation system which mainly comprises a high-pressure fuel tank, a fuel filler pipe assembly, a fuel filler cover, a carbon tank ash filter, an inflating pump, a fuel tank isolating valve, a pressure sensor, an engine control module ECU, a vehicle controller VCU and a vehicle instrument; the high-pressure fuel tank is fixedly welded with an oil filling pipe assembly, and an oil filler cover is arranged at the extending part of the oil filling pipe assembly and is fixed at the tail end of the oil filling pipe assembly through a lock catch; the carbon tank is communicated with the high-pressure fuel tank through a second carbon tank adsorption pipe fixed on the high-pressure fuel tank; the carbon tank ash filter is communicated with the other outlet of the carbon tank through a first carbon tank adsorption pipe; the carbon tank ash filter is connected with the inflating pump; the oil tank isolation valve is arranged between the first carbon tank adsorption pipe and the second carbon tank adsorption pipe; the engine control module ECU monitors information of a pressure sensor on the high-pressure fuel tank and controls a carbon tank adsorption program; and the VCU of the whole vehicle controller wakes up the ECU of the engine control module by sucking the main relay and continuously sends an oiling request signal to the ECU of the engine control module and a whole vehicle instrument.
Specifically, the filler cap senses through pressure sensor when high-pressure fuel tank pressure > 2kpa, twists the lock tongue that the key can't pop out the filler cap, and the upper cover of filler cap can only idle, can't open the filler cap, and when high-pressure fuel tank pressure is less than or equal to 2kpa, the filler cap normally opens.
Specifically, the fuel lid includes: the device comprises a lower cover body, a pressure sensing diaphragm, a return spring, a cap-shaped valve core, a lock tongue, a lock core and an upper cover body; the lower cover body is installed inside the oil filling pipe assembly, the center of the bottom surface of the lower cover body is hollowed out, a pressure sensing diaphragm is installed, the pressure sensing diaphragm is always attached to the bottom surface of the lower cover body under the support of a return spring, a cap-shaped valve core is arranged on the outer ring of the return spring and fixed in the middle of the lower cover body, a spring bolt is arranged above the cap-shaped valve core to limit the movement of the lock cylinder, and the lock cylinder is fixed in the middle of the upper cover body.
The invention has the beneficial effects that:
the invention provides an extended-range light truck fuel evaporation system and a refueling control carbon tank desorption method, which are accurate and efficient by judging whether a refueling event is finished by utilizing the vehicle speed, and simultaneously, the refueling amount recognition function is added, so that the desorption requirement of the carbon tank after refueling can be met, the risk of escaping refueling steam to the atmosphere is avoided, the desorption frequency of the carbon tank can be optimized, energy is saved, and the extended-range light truck fuel evaporation system has the advantages of accuracy, high efficiency, safety, reliability, energy conservation and environmental protection, and customer complaints are synchronously reduced. The main hardware related by the invention is a set of highly integrated high-pressure fuel evaporation control system, the requirement on the mounting point of the chassis frame is reduced, components such as a passenger car refueling small door, a refueling small door switch mechanism, a switch position sensor and the like are not needed, a refueling cover is added, the chassis arrangement space is saved, the customer satisfaction degree is improved, the modular design realizes good universality of a vehicle type platform, and the investment and development cost can be saved.
Drawings
FIG. 1 is a flow chart of a fueling control of an extended range light truck fuel vaporization system;
FIG. 2 is a flow chart of a carbon canister desorption method after refueling of the extended range light truck fuel evaporation system;
FIG. 3 is a schematic diagram of the main hardware of the refueling control and canister desorption method of the extended range light truck fuel evaporation system;
FIG. 4 is a schematic view of a fuel filler cap structure;
FIG. 5 is a schematic structural diagram of an integrated modular extended range light truck fuel evaporation control system;
FIG. 6 is an overall view of the carbon canister, the canister mounting bracket, and the high-pressure fuel tank trailing arm bracket;
FIG. 7 is a view showing an installation structure of an inflating pump bracket and a bracket of a high-pressure fuel tank bracket;
FIG. 8 is a view showing the mounting structure of the filler tube mounting bracket and the bracket of the high-pressure fuel tank;
FIG. 9 is an assembly view of a fuel evaporation system of an extended range light truck;
wherein: 1. the device comprises a left high-pressure fuel tank strap, a left high-pressure fuel tank bracket, a 3 high-pressure fuel tank, a 4 first carbon tank adsorption pipe, a 5 right high-pressure fuel tank strap, a 6 right high-pressure fuel tank bracket, a 7 fuel tank isolating valve, an 8 second carbon tank adsorption pipe, a 9 carbon tank ash filter, a 10 inflation pump, an 11 inflation pump bracket, a 12 vent pipe, a 13 carbon tank, a 14 carbon tank bracket, a 15 frame, a 16 carbon tank detachment pipe, a 17 engine oil supply pipe, an 18 filter, a 19, an oil filling pipe assembly, a 20 oil filling pipe installation bracket, a 21 oil filling cover, a 211, a lower cover body, a 212, a pressure sensing diaphragm, a 213 return spring, a 214, a cap-shaped valve core, a 215, a bolt, 216, a lock cylinder, 217, an upper cover body, a 22, an oil pump conveying module, a 23 and a pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, a method for controlling desorption of a canister by refueling an extended range light truck fuel evaporation system includes:
s1, a cab issues an oiling instruction;
s2, if the whole vehicle is not under high pressure, the VCU of the vehicle controller sends a refueling forbidding signal to a vehicle instrument, and the vehicle instrument displays that the vehicle is not flamed out and refueling is forbidden; if the high voltage is applied, the VCU of the vehicle controller is awakened by the hard wire, meanwhile, the VCU of the vehicle controller is attracted by the main relay to awaken the ECU of the engine control module and continuously send an oiling request signal to the ECU of the engine control module and the instrument of the whole vehicle until the event is failed or ended, and the instrument of the whole vehicle records the current oil quantity value V 1 The ECU controls the oil tank isolating valve to open and release pressure, and sends a state signal of the opening of the oil tank isolating valve;
s3, detecting an internal pressure signal of the oil tank by an engine control module ECU, calculating an absolute value of a difference value between the current oil tank pressure and the atmospheric pressure, and starting timing for 10 seconds; when the absolute value of the difference value between the pressure of the high-pressure fuel tank and the atmospheric pressure is more than 2kpa, an engine control module ECU reports the pressure relief fault of the fuel tank, the engine control module ECU sends a pressure relief fault signal to a whole vehicle instrument and a VCU, an event is finished after the sending time lasts for 5 seconds, the whole vehicle instrument sounds for 5 seconds after receiving the fault signal and displays the information of the pressure relief fault of the high-pressure fuel tank, the engine control module ECU then controls to close an electromagnetic valve, the VCU of the whole vehicle controller judges the current power supply gear after receiving the fault signal, starts timing, an ON gear does not perform any processing, an OFF gear times for 15 seconds (the timing for 15 seconds needs to be determined according to the time length of the closed electromagnetic valve), then a main relay is disconnected, and maintenance is applied; when an engine management system EMS counts for 10 seconds and detects that the absolute value of the difference value between the oil tank pressure and the atmospheric pressure is less than or equal to 2Kpa (the value can be calibrated), a pressure relief completion signal is sent to a whole vehicle instrument, the whole vehicle instrument receives the pressure relief completion signal and displays information of 'pressure relief completion of a high-pressure fuel tank and refueling', after pressure relief of a high-pressure fuel tank 3 is completed, a pressure sensor detects that the absolute value of the difference value between the oil tank pressure and the atmospheric pressure is less than or equal to 2Kpa, a refueling cover can be automatically unlocked, and manual refueling can be carried out after unlocking. The filler cap is the filler cap, when high-pressure fuel tank pressure > 2kpa, twist and change the key and can't pop out the filler cap spring bolt, and the filler cap upper cover can only idle, can't open the filler cap, when high-pressure fuel tank pressure is less than or equal to 2kpa, the filler cap can normally open.
S4, detecting the vehicle speed and judging the duration time of the refueling process by the VCU of the vehicle control unit; after oiling is finished, timing by a VCU (vehicle control unit) and entering step S5 when the vehicle speed is more than or equal to 5 km/h; when the vehicle speed is less than 5km/h, the vehicle control unit VCU continues to carry out manual oiling when judging that the duration of the oiling process is below 15 minutes; when the vehicle speed is less than 5km/h, the vehicle control unit VCU judges that the duration time of the refueling process is more than 15 minutes, and then the step S5 is executed;
s5, measuring the oil mass value V after refueling by the whole vehicle instrument 2 The difference between the fuel quantity value after refueling and the fuel quantity value before refueling is calculated by the vehicle instrument and is the currently added fuel quantity value V f ，V f =V 2 -V 1 And will V f The value of the voltage is sent to a vehicle control unit VCU and an engine control module ECU;
s6, the VCU of the whole vehicle controller and the ECU of the engine control module determine the currently added oil mass value V of the whole vehicle instrument f A value of (d); the currently added oil quantity value V f The value of the VCU is more than 5L, and the VCU of the vehicle control unit starts the engine to executeDetermining a carbon tank desorption program, and executing the step S7; the currently added oil quantity value V f The value of the oil tank is less than or equal to 5L, the engine control module ECU controls to close the oil tank isolating valve, the VCU of the vehicle control unit detects the power supply gear, the power supply gear is an ON gear and is not processed, the power supply gear is an OFF gear and disconnects the main relay, and the oiling process is completed.
After refueling is completed, the normal use process of the extended range light truck executes carbon tank desorption control according to the following method so as to prevent gasoline stored in the carbon tank from saturated escaping to the atmosphere, and the method specifically comprises the following steps:
s7, reading a current oil mass signal of a vehicle instrument and comparing the current oil mass signal with the alarm oil mass 5L by the VCU of the vehicle controller; when the alarm oil quantity reaches or exceeds the alarm oil quantity warning line 5L, starting a special desorption program of the carbon tank; step S8 is executed if the alarm oil quantity alarm line 5L is not reached;
s8, comparing a pressure sensor signal acquired by an engine control module ECU with warning pressure P1; when the pressure of the high-pressure fuel tank reaches or exceeds the warning pressure P1, starting a special desorption program of the carbon tank; step S9 is executed without reaching the guard pressure P1 of the high-pressure fuel tank; the warning pressure P1 is the opening pressure of a mechanical safety valve of the oil tank isolating valve;
s9, calculating the steam overflow amount of the accumulated oil tank; the method comprises the steps that an on-board self-diagnosis system OBD detects that an oil tank isolating valve is opened once, the oil tank isolating valve is counted each time, the number of times of accumulation is recorded as N, the number of times of accumulation of the on-board self-diagnosis system OBD detecting the oil tank isolating valve is represented as N, the maximum value of oil vapor overflowing from an oil tank when the oil tank isolating valve is opened is B through a test, and the steam overflowing amount of the accumulated oil tank is S = N.B; and when the steam overflow quantity S of the accumulated oil tank is less than or equal to 70 percent of the adsorption working capacity of the carbon tank, the engine works normally, and when the steam overflow quantity S of the accumulated oil tank is more than 70 percent of the adsorption working capacity of the carbon tank, a special desorption program of the carbon tank is started.
According to the universal characteristics of the engine, the vacuum degree of an engine intake manifold is required to be large in the special desorption procedure of the carbon tank, the working condition of desorption air flow required by complete desorption of the carbon tank can be achieved in a short time, and calibration is required according to the actual vehicle condition.
Further, after a special desorption program of the carbon tank is started, the whole vehicle instrument displays the working state of the carbon tank, and the carbon tank desorption operation is continuously carried out before the desorption flow rate does not reach a flow threshold value of 500 BV; when the desorption flow reaches the flow threshold value of 500BV, the engine resumes normal operation, and the whole vehicle instrument is closed to display.
Referring to fig. 3, in order to solve the problem of insufficient installation points and arrangement space of the components of the extended range type light truck high-pressure fuel evaporation control system on the chassis, the present invention relates to an integral module of a light truck extended range type light truck fuel evaporation system, which comprises: the device comprises a high-pressure fuel tank 3, a carbon tank 13, an inflating pump 10, a carbon tank ash filter 9, a pressure sensor 23, an oil filling pipe assembly 19 and an oil filling port cover 21. The components are integrated into a whole module and are arranged on the chassis frame 15 through the left high-pressure fuel tank bracket arm support 2 and the right high-pressure fuel tank bracket arm support 6. The carbon tank 13, the inflating pump 10 and the carbon tank ash filter 9 can be ingeniously arranged on a bracket in a shape like a Chinese character 'ji' on the left high-pressure fuel tank bracket arm bracket 2 higher than the upper surface of the high-pressure fuel tank 3 through a bracket, the pressure sensor 23 is integrated on an oil pump flange and is arranged on the high-pressure fuel tank 3 together with the oil pump through a locking ring, and the oil filling pipe and the oil filling port cover 21 form a module with the high-pressure fuel tank 3 through an oil filling pipe mounting bracket 20 which is screwed at the bottom of the left high-pressure fuel tank bracket arm bracket 2 and extends upwards.
Referring to fig. 4, which is a schematic structural diagram of the filler cap 21, the lower cap body 211 is installed inside the filler tube assembly 19, the center of the bottom surface of the lower cap body 211 is hollowed out, and is provided with a pressure sensing diaphragm 212, the pressure sensing diaphragm 212 is always attached to the bottom surface of the lower cap body 211 under the support of a return spring 213 to sense the pressure inside the high-pressure fuel tank 3, a cap-shaped valve core 214 is arranged on the outer ring of the return spring 213 and fixed in the middle of the lower cap body 211, a lock tongue 215 is arranged above the cap-shaped valve core 214 to limit the movement of the lock cylinder 216, and the lock cylinder 216 is fixed in the middle of the upper cap body 217.
The working principle of the oil filler cover 21 is as follows: when the internal pressure of the high-pressure fuel tank 3 is greater than 2kpa, the pressure sensing diaphragm 212 deforms to push the cap-shaped valve core 214 upwards to cover the bolt 215, so that when the key is twisted, the bolt 215 cannot extend, the upper cover 217 cannot be locked with the lower cover 211 and only can idle, and the filler cap 21 cannot be opened at the moment.
When the internal pressure of the high-pressure fuel tank 3 is less than or equal to 2kpa, the return spring 213 pushes the cap-shaped valve core 214 to return, and when the key is twisted, the bolt 215 can normally extend out to lock the lower cover body 211, so that the upper cover body 217 and the lower cover body 211 are locked, the upper cover body 217 is rotated to drive the lower cover body 211 to rotate, and the filler cap 21 is opened.
Please refer to fig. 5, which is a schematic structural diagram of an integrated modularized extended range light truck fuel evaporation control system:
the range-extended light truck fuel evaporation control system comprises a left fuel tank strap 1, a left fuel tank bracket arm support 2, a high-pressure fuel tank 3, a first carbon tank adsorption pipe 4, a right fuel tank strap 5, a right fuel tank bracket arm support 6, a fuel tank isolating valve 7, a second carbon tank adsorption pipe 8, a carbon tank ash filter 9, an inflating pump 10, an inflating pump support 11, a vent pipe 12, a carbon tank 13, a carbon tank support 14, a frame 15, a carbon tank desorption pipe 16, an engine oil supply pipe 17, a filter 18, an oil filling pipe assembly 19, an oil filling pipe mounting support 20, a fuel tank cover 21, an oil pump conveying module 22 and a pressure sensor 23; the high-pressure fuel tank 3 is divided into upper and lower box-shaped fuel tanks, a left fuel tank bracket arm support 2 is arranged on the left side of the bottom surface of the high-pressure fuel tank 3, a right fuel tank bracket arm support 6 is arranged on the right side, the left fuel tank bracket arm support 2 is fixed on the frame 15, and a filter 18 is fixed in the middle of the left fuel tank bracket arm support; one side of the filter 18 is connected with an oil pump conveying module 22 through an engine oil supply pipe 17, and the other end of the filter is an outlet of the engine oil supply pipe 17; the right fuel tank bracket arm 6 is fixed on the frame 15, one side of the right fuel tank bracket arm is provided with a fuel tank isolating valve 7, and the other side of the right fuel tank bracket arm is provided with an inflating pump bracket 11; one side of the oil tank isolation valve 7 is connected with the second carbon tank adsorption pipe 8, and the other side of the oil tank isolation valve is connected with the oil pump conveying module 22 through the first carbon tank adsorption pipe 4; the second carbon tank adsorption pipe 8 is connected with one end of a carbon tank 13; the carbon tank 13 is horizontally placed on the carbon tank support 14, and the other end of the carbon tank 13 is connected with the inflating pump 10 through the vent pipe 12; a carbon tank desorption pipe 16 is arranged below the carbon tank 13; the inflating pump 10 is arranged on the inflating pump bracket 11; the inflating pump support 11 is provided with an inflating pump 10 and a carbon tank ash filter 9 which forms a combined part with the inflating pump 10 through a quick connector; the carbon tank support 14 is fixedly connected to the left fuel tank bracket arm support 2 through bolts; the upper inner side of the left fuel tank bracket arm support 2 fixes the left fuel tank by a left fuel tank strap 1; the right fuel tank is fixed on the inner side of the right fuel tank bracket by a right fuel tank strap 5; the oil tank cover 21 is connected with a threaded interface which protrudes outwards from the oil filling pipe assembly 19 through threads; the oil filling pipe assembly 19 is provided with an oil filling pipe mounting bracket 20 at a position close to the oil tank cover 21; the fuel filler pipe mounting bracket 20 is L-shaped, one end of the fuel filler pipe mounting bracket is fixed on the left fuel tank bracket arm bracket 2 through a bolt, and the other end of the fuel filler pipe mounting bracket is fixed with the fuel filler pipe assembly 19; and a pressure sensor 23 is arranged below the high-pressure fuel tank (3).
Referring to fig. 6, an overall structure of a carbon canister 13, a carbon canister mounting bracket 14 and a right high-pressure fuel tank bracket 6 is shown, the carbon canister 13 is fixed on the carbon canister mounting bracket 14 in a three-point constraint manner, the carbon canister mounting bracket 14 is fixed on a 100 mm-extended n-shaped bracket at the frame 15 end of a left high-pressure fuel tank bracket 2 in a screwed manner, a bolt is welded on the carbon canister mounting bracket 14, a nut is arranged in a n-shaped groove of the left high-pressure fuel tank bracket 2, and the carbon canister 13, the carbon canister mounting bracket 14 and the left high-pressure fuel tank bracket 2 form an integral.
Referring to fig. 7, a mounting structure of the inflating pump bracket 11 and the left high-pressure fuel tank bracket 2 is shown, in which the inflating pump 10 and the carbon canister ash filter 9 form a combined part through a quick connector, and then the combined part and the inflating pump 10 pipe are fixed on the left high-pressure fuel tank bracket 2 through the inflating pump bracket 11 by screw joint, and form an integral body on a bracket in a shape like a Chinese character ji extending 100mm above the frame 15. The inner shell of the carbon canister ash filter 9 is designed with a louver air suction port, and the air port faces downwards, so that the chassis can be prevented from splashing water and dust. 9 and inflating pump 10 are strained through carbon tank ash and are inserted formula interface soon and inflating pump 10 assembly integration together, can reduce one section carbon tank ash and strain the connecting line of 9 and inflating pump 10.
Please refer to fig. 8, which is a structural view of the installation structure of the filler tube mounting bracket and the bracket of the high pressure fuel tank bracket; the oil filling pipe assembly 19 is provided with an oil filling pipe mounting bracket 20 at a position close to the oil filling cup opening, so that the number of mounting points for adding sheet metal and an oil filling pipe opening on a container can be reduced; the filler tube mounting bracket 20 is L-shaped, with one end fixed to the left high pressure fuel tank trailing arm bracket 2 by a bolt and the other end fixed to the filler tube assembly 19.
The pressure sensor 23 is integrated in an oil pump which is mounted on the high-pressure fuel tank by means of a locking ring structure.
The carbon tank 13, the carbon tank mounting bracket 14, the carbon tank ash filter 9, the inflating pump 10 mounting bracket, the oil filling pipe assembly 19 and the oil filling pipe mounting bracket 20 are integrally mounted on the left high-pressure fuel tank bracket arm bracket 2 and the right high-pressure fuel tank bracket arm bracket 6 of the high-pressure fuel tank 3, the fuel tank isolating valve 7, the oil pump conveying module 22, the pressure sensor 23, the high-pressure fuel tank strap, the filter 18, the carbon tank 13 adsorption pipe, the vent pipe 12 and the engine oil supply pipe 17 are integrally mounted on the high-pressure fuel tank 3, the whole fuel evaporation control and fuel storage conveying system is highly integrated, an integral module is formed, the requirement on the mounting point of the frame 15 is reduced to the maximum extent, meanwhile, the whole system is compact, and a large arrangement space is saved. The modularized design can realize the overall general use of the straddle carrier type, thereby reducing the development investment and the part cost of the system, the saved chassis arrangement space can be used for the requirements of personalized customization and modification of customers, such as adding a tool box, a brake water tank, a sweeping disc device of a sanitation vehicle and the like, and the customer satisfaction degree is greatly improved.
And gaps of 25-30mm are reserved between the inflating pump 10 and the carbon tank ash filter 9 assembly as well as between the carbon tank 13 and the upper shell of the high-pressure fuel tank 3, so that the mounting and dismounting spaces of the left high-pressure fuel tank strap 1 and the right high-pressure fuel tank strap 5 are reserved.
The inner shell of the carbon canister ash filter 9 is designed to prevent the chassis from splashing water and a dustproof louver air suction port, and the air port faces downwards.
One end of the oil filling pipe mounting bracket 20 is fixed on the left high-pressure fuel tank bracket arm bracket 2 through a bolt, a nut is welded on the left high-pressure fuel tank bracket arm bracket 2, and the bolt is mounted from the bottom; the other end is fixedly installed on the oil filling pipe assembly 19 through a bolt and a nut, the nut is welded on a flange of the oil filling pipe assembly 19, and the bolt is installed from top to bottom.
Please refer to fig. 9, which is an assembly diagram of a certain extended range type light truck fuel evaporation system, the fuel evaporation control system is highly integrated into a set of high pressure fuel evaporation control system, and the fuel filler cap is specially designed, thereby ensuring the stability and reliability of the fuel filling process, reducing the requirement on the mounting point of the chassis frame, and eliminating the components such as the passenger car fuel filler door, the fuel filler door switch mechanism and the switch position sensor.
In summary, the extended range type light truck fuel evaporation system and the refueling control carbon tank desorption method provided by the invention have the advantages that whether a refueling event is completed or not is judged by using the vehicle speed, the accuracy and the high efficiency are realized, the refueling amount identification function is added, the desorption requirement of the carbon tank after refueling can be met, the risk that refueling steam escapes to the atmosphere is avoided, the desorption frequency of the carbon tank can be optimized, the energy is saved, the accuracy and the high efficiency are realized, the safety and the reliability are realized, the energy is saved, the environment is protected, and the customer complaints are synchronously reduced. The main hardware related by the invention is a set of highly integrated high-pressure fuel evaporation control system, so that the requirement on the mounting point of a chassis frame is reduced, no components such as a passenger car refueling small door, a refueling small door switching mechanism, a switch position sensor and the like are needed, a refueling cover is added, the chassis arrangement space is saved, the customer satisfaction degree is improved, the modular design realizes good universality of a vehicle type platform, and the investment and development cost can be saved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (8)
1. A method for controlling desorption of a carbon tank by refueling an extended range type light truck fuel evaporation system is characterized by comprising the following steps: the method comprises the following steps:
s1, a cab issues an oiling instruction;
s2, detecting whether the vehicle is under high pressure by an engine control module ECU: if the whole vehicle is not under high pressure, the VCU of the vehicle controller sends a refueling forbidding signal to a vehicle instrument, and the vehicle instrument displays that the vehicle is not flamed out and refueling is forbidden; if the high voltage is applied, the VCU of the vehicle controller is awakened by the hard wire, meanwhile, the VCU of the vehicle controller is attracted by the main relay to awaken the ECU of the engine control module and continuously sends the refueling request signal to the ECU of the engine control module and the instrument of the whole vehicle until the VCU of the vehicle controller is attracted by the main relay to awaken the EMS of the engine management system to send the refueling request signal to the EMS of the engine management system and the instrument of the whole vehicleWhen the fault or the end occurs, the whole vehicle instrument records the current oil quantity value V 1 The ECU controls the oil tank isolation valve to open and release pressure;
s3, detecting an internal pressure signal of the oil tank by an engine control module ECU, starting timing for 10 seconds, and giving a prompt to a vehicle instrument according to the current pressure of the high-pressure fuel tank;
s4, detecting the speed of the vehicle and judging the duration time of the refueling process by the VCU of the vehicle controller; after oiling is finished, timing by a VCU (vehicle control unit) and entering step S5 when the vehicle speed is more than or equal to 5 km/h; when the vehicle speed is less than 5km/h, the vehicle control unit VCU continues to carry out manual oiling when judging that the duration of the oiling process is below 15 minutes; when the vehicle speed is less than 5km/h, the vehicle control unit VCU judges that the duration time of the refueling process is more than 15 minutes, and then the step S5 is executed;
s5, measuring the oil mass value V after refueling by the whole vehicle instrument 2 And the whole vehicle meter calculates the currently added oil quantity value V f And will V f The value of the voltage is sent to a vehicle control unit VCU and an engine control module ECU;
s6, the VCU of the whole vehicle controller and the ECU of the engine control module determine the currently added oil mass value V of the whole vehicle instrument f A value of (d); the currently added oil quantity value V f If the value is greater than 5L, the vehicle control unit VCU starts the engine to execute a specific carbon tank desorption program, and step S7 is executed; the currently added oil quantity value V f When the value of the oil tank is less than or equal to 5L, the engine control module ECU controls to close an oil tank isolation valve, a vehicle control unit VCU detects a power supply gear, the power supply gear is an ON gear and is not processed, the power supply gear is an OFF gear and disconnects a main relay, and the oiling process is finished;
s7, adding the oil quantity value V at present f The value of the alarm oil quantity is larger than 5L, the VCU of the vehicle controller reads the current oil quantity signal of the vehicle instrument and compares the current oil quantity signal with the alarm oil quantity of 5L; when the alarm oil quantity reaches or exceeds the alarm oil quantity warning line 5L, starting a special desorption program of the carbon tank; step S8 is executed when the alarm oil quantity warning line is not reached;
s8, collecting pressure sensor signals and warning pressure P by an engine control module ECU 1 Carrying out comparison; the pressure of the high-pressure fuel tank reaches or exceeds a warning pressure P 1 Starting a special desorption program of the carbon tank; short of the goalWarning pressure P to high-pressure fuel tank 1 Step S9 is executed; guard pressure P 1 Opening pressure for a mechanical safety valve of an oil tank isolation valve;
s9, calculating the steam overflow amount of the accumulated oil tank; and when the steam overflow quantity S of the accumulated oil tank is less than or equal to 70 percent of the adsorption working capacity of the carbon tank, the engine works normally, and when the steam overflow quantity S of the accumulated oil tank is more than 70 percent of the adsorption working capacity of the carbon tank, a special desorption program of the carbon tank is started.
2. The extended range light truck fuel evaporation system refueling control carbon tank desorption method as claimed in claim 1, wherein: in step S3, the prompt given by the pressure vehicle instrument of the current high-pressure fuel tank includes: displaying a prompt that the high-pressure fuel tank is releasing pressure, and after 10 seconds, if the pressure in the high-pressure fuel tank is more than 2kpa, an engine control module ECU reports a fuel tank pressure release fault and displays the high-pressure fuel tank pressure release fault on a whole vehicle instrument, and the vehicle instrument is required to be maintained; if the pressure in the high-pressure fuel tank is less than or equal to 2kpa, the whole vehicle instrument displays that pressure relief is finished and oil is required to be filled, and at the moment, the oil filler cover can be opened for manual oil filling.
3. The extended range light truck fuel evaporation system refueling control carbon tank desorption method as claimed in claim 1, wherein: in the step S6, the currently added oil amount value V f For the oil quantity value V after refueling 2 With the current oil quantity value V 1 The difference is the currently added oil quantity value, and V is satisfied f =V 2 -V 1 。
4. The extended range light truck fuel evaporation system refueling control carbon tank desorption method as claimed in claim 1, wherein: in step S9, the vapor spillage of the accumulated fuel tank satisfies the following formula:
S=N·B
in the above formula: s represents the steam overflow amount of the accumulated oil tank;
n represents the accumulated opening times of the vehicle-mounted self-diagnosis system OBD for detecting the oil tank isolating valve;
b represents the maximum value of the tank isolation valve opening for oil vapor escaping from the tank as measured by the test.
5. The extended range light truck fuel evaporation system refueling control carbon tank desorption method as claimed in claim 1, wherein: after the carbon tank special desorption program is started, the whole vehicle instrument displays the working state of the carbon tank, and the carbon tank desorption operation is continuously carried out before the desorption flow rate does not reach the flow threshold value of 500 BV; when the desorption flow reaches the flow threshold value of 500BV, the engine resumes normal operation, and the whole vehicle instrument is closed to display.
6. An extended range light truck fuel evaporation system, mainly comprising: the device comprises a high-pressure fuel tank (3), a fuel filling pipe assembly (19), a fuel filling port cover (21), a carbon tank (13), a carbon tank ash filter (9), an inflating pump (10), a fuel tank isolating valve (7), a pressure sensor (23), an engine control module ECU, a vehicle control unit VCU and a vehicle instrument; the method is characterized in that: the high-pressure fuel tank (3) is fixedly welded with a filler pipe assembly (19), a filler cover (21) is arranged at the extending position of the filler pipe assembly (19), and the filler pipe assembly (19) are fixed at the tail end of the filler pipe assembly (19) through a lock catch; the carbon tank (13) is communicated with the high-pressure fuel tank (3) through a second carbon tank adsorption pipe (4) fixed on the high-pressure fuel tank (3); the carbon tank ash filter (9) is communicated with the other outlet of the carbon tank (13) through a first carbon tank adsorption tube; the carbon tank ash filter (9) is connected with an inflating pump (10); the oil tank isolation valve (7) is arranged between the first carbon tank adsorption pipe (4) and the second carbon tank adsorption pipe (8); the ECU monitors information of a pressure sensor (23) on the high-pressure fuel tank (3) and controls an adsorption program of the carbon tank (13); and the VCU of the whole vehicle controller wakes up the ECU of the engine control module by sucking the main relay and continuously sends an oiling request signal to the ECU of the engine control module and a whole vehicle instrument.
7. The extended range light truck fuel evaporation system of claim 6, wherein: when filler cap (21) sensed that the pressure inside high-pressure fuel tank (3) is greater than 2kpa through pressure sensor (23), the twist key can not pop out lock tongue (215) of filler cap (21), and upper cover body (217) of filler cap (21) idles, can not open filler cap (21), and when the pressure inside high-pressure fuel tank (3) is less than or equal to 2kpa, filler cap (21) normally opens.
8. The extended range light truck fuel evaporation system of claim 6, wherein: the fuel filler cap (21) includes: the pressure sensing type lock cylinder comprises a lower cover body (211), a pressure sensing diaphragm (212), a return spring (213), a cap-shaped valve core (214), a bolt (215), a lock cylinder (216) and an upper cover body (217); the lower cover body (211) is arranged inside the oil filling pipe assembly (19), the center of the bottom surface of the lower cover body (211) is hollowed out, a pressure sensing membrane (212) is arranged, the pressure sensing membrane (212) is supported by a return spring (213) and is always attached to the bottom surface of the lower cover body (211), a hat-shaped valve core (214) is arranged on the outer ring of the return spring (213) and fixed to the middle of the lower cover body (211), a lock tongue (215) is arranged above the hat-shaped valve core (214) to limit movement of a lock cylinder (216), and the lock cylinder (216) is fixed to the middle of the upper cover body (217).
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130011752A (en) * | 2011-07-22 | 2013-01-30 | 현대자동차주식회사 | Apparatus for evaporative gas process of vehicle and control method thereof |
| CN209539471U (en) * | 2019-02-19 | 2019-10-25 | 江铃汽车股份有限公司 | A kind of hybrid vehicle EVAP Evaporative System leakage diagnostic device |
| CN111284323A (en) * | 2018-12-06 | 2020-06-16 | 福特全球技术公司 | Method and system for refueling a vehicle |
| CN114060163A (en) * | 2020-07-30 | 2022-02-18 | 比亚迪股份有限公司 | Fuel leakage detection method and system and vehicle |
| CN114320674A (en) * | 2020-09-30 | 2022-04-12 | 株式会社电装 | Fault diagnosis device for leak diagnosis device |
-
2022
- 2022-05-24 CN CN202210568639.4A patent/CN114893328B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130011752A (en) * | 2011-07-22 | 2013-01-30 | 현대자동차주식회사 | Apparatus for evaporative gas process of vehicle and control method thereof |
| CN111284323A (en) * | 2018-12-06 | 2020-06-16 | 福特全球技术公司 | Method and system for refueling a vehicle |
| CN209539471U (en) * | 2019-02-19 | 2019-10-25 | 江铃汽车股份有限公司 | A kind of hybrid vehicle EVAP Evaporative System leakage diagnostic device |
| CN114060163A (en) * | 2020-07-30 | 2022-02-18 | 比亚迪股份有限公司 | Fuel leakage detection method and system and vehicle |
| CN114320674A (en) * | 2020-09-30 | 2022-04-12 | 株式会社电装 | Fault diagnosis device for leak diagnosis device |
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