CN112269369A - Linear control electric control valve and electric control fuel system - Google Patents
Linear control electric control valve and electric control fuel system Download PDFInfo
- Publication number
- CN112269369A CN112269369A CN202011133247.2A CN202011133247A CN112269369A CN 112269369 A CN112269369 A CN 112269369A CN 202011133247 A CN202011133247 A CN 202011133247A CN 112269369 A CN112269369 A CN 112269369A
- Authority
- CN
- China
- Prior art keywords
- chamber
- electric control
- sealing ring
- hole
- vent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0221—Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention provides a linear control electric control valve and an electric control fuel system, wherein the electric control fuel system comprises: the device comprises a storage tank, a carbon tank, an electric control valve and a controller. The air inlet of the electric control valve is connected with the air outlet of the storage tank, the first air vent of the electric control valve is connected with the air inlet of the carbon tank, and the second air vent of the electric control valve is connected with the engine. The controller is in signal connection with the electric control valve, and when the vehicle runs or stops, the controller controls the air inlet of the electric control valve to be in sealed isolation with the first air vent and the second air vent. When the storage tank is decompressed or filled, the controller controls the air inlet of the electric control valve to be communicated with the first air vent. When the carbon tank is desorbed, the controller controls the first vent and the second vent to be communicated. When storage tank and carbon tank carry out the desorption simultaneously, the air inlet, first blow vent and the second blow vent of controller control electric control valve switch on each other. The invention can improve the control precision and the fuel utilization efficiency of the system.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a linear control electric control valve and an electric control fuel system.
Background
In order to meet increasingly strict laws and regulations, oil and gas are required to be sealed in a fuel system under certain conditions and controlled by a fuel tank isolation valve, the pressure inside the fuel tank is also changed interactively due to the interactive change of the complexity of the fuel system and the fuel tank is deformed or shriveled due to high pressure or low pressure under extreme conditions, so that the fuel tank system is required to have the pressure-resistant characteristic, release the pressure when the internal pressure of the fuel tank exceeds a certain range and supplement the gas to the fuel tank when the internal pressure of the fuel tank is insufficient.
A carbon tank is connected to the exhaust path of the fuel system, and activated carbon in the carbon tank can effectively adsorb oil gas molecules. The carbon tank needs frequent desorption, is about to send the engine burning to adsorbed oil vapor, reduces environmental pollution, promotes the nevertheless current desorption control valve of fuel availability factor and oil tank isolating valve and adopts two valve control, and the cost is higher. The need to release the pressure generated by the vapor prior to refueling to prevent failure of the refueling requires waiting time for the filler; meanwhile, in the process of filling fuel in the fuel storage tank, fuel vapor in the storage tank needs to be discharged to a carbon tank for oil vapor adsorption; when the fuel is filled to a certain level, the traditional mechanical valve cuts off the oil vapor passage to control the volume, but the accuracy of the volume is affected by the interference of air flow fluctuation and the like, and a great deal of time and cost are consumed for modifying a storage tank or a valve in the later period. Therefore, how to promote the tank vapor management and control has important research significance.
Disclosure of Invention
The invention provides a linear control electric control valve and an electric control fuel system, which solve the problem of unreasonable fuel gas management in a fuel storage tank in the traditional high-pressure fuel system, can improve the control precision of the fuel system, and improve the fuel utilization efficiency and the environmental protection effect of a vehicle.
In order to achieve the above purpose, the invention provides the following technical scheme:
a linearly controlled, electrically controlled valve comprising: a housing and a switching device;
a first chamber, a second chamber and a third chamber are arranged in the shell, the first chamber is provided with an air inlet of the electric control valve, the second chamber is provided with a first vent, and the third chamber is provided with a second vent;
the switching device is used for controlling the first chamber, the second chamber and the third chamber to be communicated or isolated in a closed mode.
Preferably, one side of the second chamber is connected with the first chamber, and the other side of the second chamber is connected with the third chamber;
the second chamber is provided with a first through hole and a second through hole, the second chamber is communicated with the first chamber through the first through hole, and the second chamber is communicated with the third chamber through the second through hole;
the switching device controls the conduction or the sealing of the first through hole and the second through hole to realize the mutual conduction or the closed isolation among the first chamber, the second chamber and the third chamber.
Preferably, the switching device includes: the device comprises a stroke control unit, a guide rod, a return spring, a first sealing ring, a second sealing ring and a third sealing ring;
the first sealing ring and the second sealing ring are connected in series on the guide rod, the first sealing ring is located in the first cavity, the second sealing ring is located in the second cavity, and the first sealing ring and the second sealing ring are respectively located on two sides of the first through hole and used for adjusting the opening degree of the first through hole;
the third sealing ring is arranged in the third chamber, the reset spring is arranged in the third chamber, one end of the reset spring is connected with the bottom surface of the third chamber, and the other end of the reset spring is connected with the third sealing ring, so that the third sealing ring seals the second through hole under the action of the reset spring;
the guide rod penetrates through the first through hole and is located in the first cavity and the second cavity, the stroke control unit drives the guide rod to move up and down, and when the guide rod moves downwards and penetrates through the second through hole, the guide rod pushes the third sealing ring to move downwards, so that the third cavity and the second cavity are communicated with each other.
Preferably, the method further comprises the following steps: an emission control device;
a discharge channel is arranged in the first chamber, an exhaust port is arranged at the end part of the discharge channel, a communication hole is arranged on the side wall of the discharge channel, and the communication hole is connected with the exhaust port of the carbon tank;
the discharge control device is arranged in the discharge channel and used for controlling the conduction or isolation of the vent of the discharge channel and the outside.
Preferably, the emission control device includes: the first cam structure, the first transmission shaft, the first spring, the first baffle, the second baffle and the fourth sealing ring;
the first baffle plate and the second baffle plate are connected in series on the first transmission shaft, the second baffle plate is arranged on one side, away from the vent hole of the discharge channel, of the communication hole, and the first baffle plate is arranged on the left side of the second baffle plate;
one end of the first spring is fixed with the first baffle plate, and the other end of the first spring is fixed with the second baffle plate;
the first cam structure is arranged on the guide rod, the first transmission shaft is perpendicular to the first cam structure, and when the guide rod moves up and down, one end of the first transmission shaft slides up and down along the surface of the first cam structure, so that the first transmission shaft is driven left and right;
the fourth sealing ring is arranged at the end part of the other end of the first transmission shaft, and when one end of the first transmission shaft is located on the first cam structure, the fourth sealing ring blocks the air vent of the exhaust channel.
Preferably, the emission control device includes: the second cam structure, the second transmission shaft, the second spring, the third baffle and the fourth baffle;
one end of the second spring is fixed with the third baffle plate, and the other end of the second spring is fixed with the fourth baffle plate;
the third baffle plate and the fourth baffle plate are connected on the second transmission shaft in series, the third baffle plate is arranged on one side of the communication hole, which is far away from the vent hole of the discharge channel, and the fourth baffle plate is arranged on the outer side of the vent hole of the exhaust channel and blocks the vent hole of the exhaust channel;
the second cam structure is arranged on the guide rod, the second transmission shaft is perpendicular to the second cam structure, and when the guide rod moves up and down, one end of the second transmission shaft slides up and down along the surface of the second cam structure, so that the second transmission shaft is driven left and right;
when one end of the second transmission shaft is positioned on the second cam structure, the fourth baffle is separated from the vent of the exhaust channel.
The present invention also provides a linearly controlled electronically controlled fuel system comprising: the storage tank, the carbon tank and the controller, and the electric control valve;
an air inlet of the electric control valve is connected with an air outlet of the storage tank, a first air vent of the electric control valve is connected with an air inlet of the carbon tank, and a second air vent of the electric control valve is connected with a fuel air inlet of an engine;
the controller is in signal connection with the electric control valve, and controls the air inlet of the electric control valve to be in sealed isolation with the first air vent and the second air vent when a vehicle runs or stops;
when the storage tank is decompressed or filled, the controller controls the air inlet of the electric control valve to be communicated with the first air vent, so that fuel gas in the storage tank is discharged into the carbon tank;
when the carbon tank is desorbed, the controller controls the first vent hole and the second vent hole to be communicated, so that the fuel gas in the carbon tank is discharged into an engine to be combusted;
the storage tank with when the carbon tank carries out the desorption simultaneously, the controller control the air inlet of automatically controlled valve, first blow vent with the second blow vent switches on each other.
Preferably, the method further comprises the following steps: a pressure sensor;
the pressure sensor is in signal connection with the controller and is used for detecting the pressure of the fuel gas in the storage tank;
when the pressure of the fuel gas is greater than a first pressure threshold value, the controller controls the air inlet of the electric control valve to be communicated with the first air vent, so that the fuel gas in the storage tank is discharged into the carbon tank.
Preferably, the method further comprises the following steps: a liquid level sensor;
the liquid level sensor is in signal connection with the controller and is used for detecting the fuel liquid level in the storage tank;
when the fuel liquid level is at a set liquid level threshold value, the controller controls the air inlet of the electronic control valve to be cut off from the first air vent.
Preferably, the method further comprises the following steps: an OBD detection module;
the OBD detection module is in signal connection with the controller and is arranged at an exhaust port of the carbon tank;
when the OBD detection module detects the working condition, the OBD detection module sends a diagnosis request signal, and the controller controls the switching device to switch according to the diagnosis request signal, so that the second cavity is communicated with the first cavity through the first through hole.
Preferably, the method further comprises the following steps: a roll-over valve;
the overturning valve is arranged between an exhaust port of the storage tank and an air inlet of the electric control valve, and the overturning valve cuts off the pipeline conduction between the storage tank and the electric control valve when the vehicle turns over or the roll angle is larger than a set angle threshold value.
The invention provides a linear control electric control valve and an electric control fuel system, wherein a first cavity, a second cavity and a third cavity are arranged in a shell of the electric control valve, the conduction or the closing of each cavity is controlled by a switching device, and meanwhile, the electric control valve is controlled by a controller to ventilate a fuel storage tank and release fuel gas desorbed by a carbon tank and the storage tank. The problem of easily appear in the current airtight fuel system fuel gas in the fuel storage tank manage and utilize unreasonablely, easily cause the extravagant and environmental pollution of energy is solved, can improve fuel system's control accuracy, improve the fuel utilization efficiency and the environmental protection effect of vehicle.
Drawings
In order to more clearly describe the specific embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below.
FIG. 1 is a schematic diagram of a linearly controlled electronically controlled fuel system according to the present invention;
FIGS. 2 to 5 are schematic views illustrating control structures of a linear control electric control valve according to the present invention;
FIG. 6 is a control flow diagram of an electronically controlled fuel system in accordance with the present invention;
FIGS. 7 to 10 are schematic views showing a control structure of another linearly controlled electric control valve according to the present invention;
FIG. 11 is a control flow diagram of another electronically controlled fuel system provided by the present invention;
fig. 12 is a schematic diagram of another electrically controlled fuel system according to the present invention.
Detailed Description
In order to make the technical field of the invention better understand the scheme of the embodiment of the invention, the embodiment of the invention is further described in detail with reference to the drawings and the implementation mode.
In the high-pressure fuel system of the current hybrid vehicle, the fuel system is often in a closed mode, so that the problem of unreasonable management and utilization of the fuel gas in the storage tank is easily caused. The invention provides a linear control electric control valve and an electric control fuel system, wherein a first cavity, a second cavity and a third cavity are arranged in a shell of the electric control valve, the conduction or the closing of each cavity is controlled by a switching device, and meanwhile, the electric control valve is controlled by a controller to ventilate a fuel storage tank and release fuel gas desorbed by a carbon tank and the storage tank. The problem of easily appear the gaseous management of fuel in the fuel storage tank and utilize unreasonablely among the current airtight fuel system, easily cause the extravagant and environmental pollution of energy is solved, can improve fuel system's control accuracy, improve the fuel utilization efficiency and the environmental protection effect of vehicle, reduce cost.
As shown in fig. 2 to 10, a linearly controlled electric control valve includes: a housing 61 and a switching device. Be equipped with first cavity 501, second cavity 502 and third cavity 503 in casing 61, first cavity 501 is equipped with the air inlet of automatically controlled valve, second cavity 502 is equipped with first air vent, third cavity 503 is equipped with the second air vent. The switching device is used for controlling the first chamber 501, the second chamber 502 and the third chamber 503 to be communicated or isolated. When the switching device is in the first switching position, the first chamber 501, the second chamber 502 and the third chamber 503 are isolated and sealed from each other. When the switching device is in the second switching position, the first chamber 501 and the second chamber 502 are in communication with each other. When the switching device is in the third switching position, the second chamber 502 is in communication with the third chamber 503. When the switching device is in the fourth switching position, the first chamber 501, the second chamber 502 and the third chamber 503 are in communication with each other.
Specifically, as shown in fig. 2, the interior of the electronic control valve can be divided into 3 chambers, namely a first chamber 501, a second chamber 502 and a third chamber 503, a large amount of outside air is needed to flush the interior of the carbon canister during desorption, and the carbon canister sucks the outside air 4 through the air suction port. The first cavity, the second cavity and the third cavity are conducted or closed and isolated through the switching device, so that the circulation of fuel gas between the electric control valve and the fuel storage tank and between the carbon tank and the engine can be effectively controlled, the problems of energy waste and environmental pollution caused by unreasonable emission and utilization of the fuel gas in the fuel storage tank and the like easily occurring in the existing closed fuel system can be solved, the electric control precision of the fuel system can be improved, and the fuel utilization efficiency and the environmental protection effect of a vehicle can be improved.
Further, one side of the second chamber is connected to the first chamber 501, and the other side of the second chamber 502 is connected to the third chamber 503. The second chamber 502 is provided with a first through hole and a second through hole, the second chamber 502 is communicated with the first chamber 501 through the first through hole, and the second chamber 502 is communicated with the third chamber 503 through the second through hole. The switching device controls the conduction or the sealing of the first through hole and the second through hole to realize the mutual conduction or the closed isolation among the first chamber 501, the second chamber 502 and the third chamber 503.
In practical application, as shown in fig. 2 to 9, the relative layout of the first chamber 501, the second chamber 502, and the third chamber 503 may adopt an upper-middle-lower structure, the second chamber 502 is located at a middle position, and a first through hole and a second through hole are respectively arranged at two corresponding sides of the second chamber 502, so that the first through hole and the second through hole are located on the same central axis. The second chamber 502 communicates with the canister 3 and the third chamber 503 communicates with the engine 2. When the first through hole and the second through hole are closed, the first chamber 501, the second chamber 502, and the third chamber 503 are closed and separated. When the first through hole is connected and the second through hole is closed, the first chamber 501 and the second chamber 502 are connected and the third chamber 503 is closed and separated. When the first through hole and the second through hole are conducted, the first chamber 501, the second chamber 502 and the third chamber 503 are conducted with each other.
As shown in fig. 2 to 5, the switching device includes: the stroke control unit 6, the guide rod 8, the return spring 10, the first sealing ring 11, the second sealing ring 12 and the third sealing ring 13. The first sealing ring 11 and the second sealing ring 12 are connected in series on the guide rod 8, the first sealing ring 11 is located in the first chamber 501, the second sealing ring 12 is located in the second chamber 502, and the first sealing ring 11 and the second sealing ring 12 are respectively located on two sides of the first through hole and used for adjusting the opening degree of the first through hole. The third sealing ring 13 is arranged in the third chamber 503, the return spring 10 is arranged in the third chamber 503, one end of the return spring 10 is connected with the bottom surface of the third chamber 503, and the other end of the return spring 10 is connected with the third sealing ring 13, so that the third sealing ring 13 seals the second through hole under the action of the return spring 10. The guide rod 8 penetrates through the first through hole and is located in the first chamber 501 and the second chamber 502, the stroke control unit 6 drives the guide rod 8 to move up and down, and when the guide rod 8 moves down and penetrates through the second through hole, the guide rod 8 pushes the third sealing ring 13 to move down, so that the third chamber 503 and the second chamber 502 are communicated with each other.
Specifically, as shown in fig. 2, the electric control valve controls the guide rod 8 to move up and down through the stroke control unit 6, and the outer sealing ring 7 is connected with the connecting position of the guide rod 8 and the outer shell of the electric control valve to prevent oil gas from leaking outside. A first sealing ring 11 and a second sealing ring 12 are arranged on the guide rod at a certain interval, and a third sealing ring 13 is connected with the spring 10. The pressure sensor 14 is used for monitoring the pressure of the storage tank, and the liquid level sensor 15 is used for monitoring the liquid level in the storage tank and providing signal input for the controller to control the operation of the electric control valve. Because the first seal ring 11 and the second seal ring 12 are connected in series on the guide rod, the stroke control unit 6 can realize different switching positions by moving the guide rod 8 up and down, when the second seal ring 12 seals the first through hole and the third seal ring 13 seals the second through hole, the switching device is in the first switching position, and at this time, the first chamber 501, the second chamber 502 and the third chamber 503 are mutually sealed and isolated. The guide rod 8 is transported downwards, when the first sealing ring 11 and the second sealing ring 12 are both far away from the first through hole, that is, the first sealing ring 11 and the second sealing ring 12 are not attached to both sides of the first through hole, the switching device is at the second switching position, and at this time, the first chamber 501 and the second chamber 502 are communicated with each other. When the guide rod 8 continues to move downwards, so that the end of the guide rod 8 pushes the third sealing ring 13 to separate from the second through hole, and the first sealing ring 11 is attached to one side of the first through hole, at this time, the switching device is in the third switching position, the first chamber 501 and the second chamber 502 are separated from each other, and the second chamber 502 and the third chamber 503 are communicated with each other. In this process, when neither the first sealing ring 11 nor the second sealing ring 12 is attached to the two sides of the first through hole, the switching device is at the fourth switching position, and the first chamber 501, the second chamber 502, and the third chamber 503 are communicated with each other.
It should be noted that the air flow rates of the first chamber 501 and the second chamber 502 can be adjusted by the relative positions of the first sealing ring 11 and the second sealing ring 12 and the first through hole through the up-and-down operation of the guide rod 8, so as to adjust the opening degree of the first through hole. When the first sealing ring 11 or the second sealing ring 12 is attached to one side of the first through hole, the first through hole is closed, and when the first sealing ring 11 and the second sealing ring 12 are not attached to two sides of the first through hole, the first through hole is opened. The first sealing ring 11, the second sealing ring 12 and the third sealing ring 13 are positioned at different positions by utilizing the up-and-down movement of the guide rod 8, so that the ventilation flow rate of the fuel gas of the fuel storage tank is adjusted.
In practical application, the stroke control unit can be a motor, the motor can be arranged outside the electric control valve so as to improve the use safety and convenience of the motor, and the guide rod penetrates through the first cavity and can be provided with an external sealing ring so as to avoid fuel gas leakage. As shown in fig. 2 and 3, when the pressure sensor 14 on the tank detects that the internal pressure of the tank is too high and the pressure needs to be released to the external environment, the controller (which may be an engine controller ECU) controls the stroke control unit 6 to drive the guide rod 8, so that the first sealing ring 11 and the second sealing ring 12 are both opened, and the third sealing ring 13 is closed. The fuel gas needs to pass through the first sealing ring 11 and the second sealing ring 12 and then reach the outside of the environment through the carbon tank 3, so as to avoid the deformation of the storage tank caused by excessive pressure. The electronic control valve may be adjusted to the state shown in fig. 3 when the fuel gas pressure is large, and may be adjusted to the state shown in fig. 2 when the fuel gas pressure is small. When level sensor 15 detects that customer's initiative will park and open when refueling the wicket, the automatically controlled valve also adjusts to the state of figure 3, first sealing washer 11, second sealing washer 12 is in the open mode, sealing washer 13 is in the closed condition, and carry out the pressure release to aperture regulation pressing force, when filling, along with the inside oil gas of storage tank liquid level rising discharge, liquid level information that detects according to level sensor is when being about to reach full liquid level simultaneously, adjust the automatically controlled valve to the state of figure 2, make the inside pressure of storage tank rise and realize initiatively jumping the rifle, also can avoid the storage tank to cross the filling. As shown in FIG. 2, the running state of the electric control valve vehicle is that the vehicle stops, runs and the fuel is refueled and jumps three working conditions, under the three working conditions, the first sealing ring 11 is in the opening state, the second sealing ring 12 and the third sealing ring 13 are in the closing state, the path of the oil gas is shown by a dotted arrow in the figure, after the oil gas is volatilized from the fuel in the storage tank, the oil gas enters the electric control valve through a pipeline, the oil gas can pass below the first sealing ring 11, but can not enter a 502 cavity, and the oil gas is prevented from leaking.
As shown in fig. 4, the canister 3 can adsorb hydrocarbon mainly because it has a certain amount of activated carbon inside, but the activated carbon has limited ability to adsorb hydrocarbon molecules, so the canister will be desorbed before saturation, and there are two modes for desorption, one is to desorb both the canister and the storage tank, and the other is to desorb only the canister. As shown in figure 4, for the operation state of the electric control valve when the carbon tank and the storage tank are desorbed, the stroke control unit 6 drives the guide rod 8 to move downwards, the first sealing ring 11, the second sealing ring 12 and the third sealing ring 13 are opened, and oil gas enters the engine 2 through the third sealing ring 13 and is combusted in the engine. As shown in fig. 5, only the canister is desorbed, and the electronic control valve closes the first seal ring 11, so that oil and gas cannot enter the second chamber 502 of the electronic control valve.
Since the canister has an outlet connected to atmosphere, in order to control the closing of the outlet more sensitively, as shown in fig. 7 to 10, the electrically controlled valve further includes: an emission control device. Be equipped with discharge passage in the first cavity, discharge passage's tip is equipped with the blow vent, the discharge passage lateral wall is equipped with the intercommunicating pore, the intercommunicating pore is connected with the gas vent of carbon tank. The discharge control device is arranged in the discharge channel and used for controlling the conduction or isolation of the vent of the discharge channel and the outside.
In one embodiment, as shown in fig. 7 and 8, the emission control device includes: the first cam structure 20, the first transmission shaft 22, the first spring 23, the first baffle 21, the second baffle 24 and the fourth sealing ring 25. The first baffle 21 and the second baffle 24 are connected in series to the first transmission shaft 22, the second baffle 24 is disposed on the side of the communication hole away from the vent 26 of the discharge passage, and the first baffle 21 is disposed on the left side of the second baffle 24. One end of the first spring 23 is fixed to the first stopper 21, and the other end of the first spring 23 is fixed to the second stopper 24. The first cam structure 20 is disposed on the guide rod 8, the first transmission shaft 22 is perpendicular to the first cam structure 20, and when the guide rod 8 moves up and down, one end of the first transmission shaft 22 slides up and down along the surface of the first cam structure 20, so that the first transmission shaft 22 transmits left and right. The fourth sealing ring 25 is disposed at an end portion of the other end of the first transmission shaft, and when one end of the first transmission shaft 22 is located on the first cam structure 20, the fourth sealing ring 25 blocks the vent hole 26 of the exhaust passage.
Specifically, as shown in fig. 7, the guide rod 8 has a first cam structure 20 and is connected to a first transmission shaft 22, the guide rod has a first spring 23, two ends of the first spring are respectively connected to a first baffle 21 and a second baffle 24, and the second baffle 24 not only can prevent the exhaust passage from leaking, but also can provide an intermediate support for the first transmission shaft 22, thereby improving the durability of the electric control valve. The fourth sealing ring 25 serves to seal the ventilation opening 26. Under the working conditions of vehicle running, parking, electricity running, refueling jump and OBD detection, the fourth sealing ring 25 is in a closed state, as shown in FIG. 6.
As shown in FIG. 8, under the working conditions of filling and pressure releasing of the storage tank, the first cam structure 20 drives the first baffle 21 and the first spring 22 to move leftwards, the first spring is in a relaxation state, the fourth sealing ring 25 is in an opening state, oil gas molecules are adsorbed by the carbon tank when oil gas passes through the carbon tank, and air is exhausted to the atmosphere through the vent. On the basis of above-mentioned state, all desorb or only the circumstances of carbon tank desorption at carbon tank and storage tank, open third sealing washer 13 and fourth sealing washer 25 through guide arm 8, can be with the action of carrying out the desorption.
In another embodiment, as shown in fig. 9 and 10, the emission control device includes: a second cam structure 27, a second drive shaft 28, a second spring 30, a third stop 29, and a fourth stop 31. One end of the second spring 30 is fixed to the third stopper 29, and the other end of the second spring 30 is fixed to the fourth stopper 31. The third baffle 29 and the fourth baffle 31 are connected in series on the second transmission shaft 28, the third baffle 29 is arranged on one side of the vent hole of the communicating hole far away from the discharge channel, and the fourth baffle 31 is arranged on the outer side of the vent hole of the discharge channel and blocks the vent hole of the exhaust channel. The second cam structure 27 is disposed on the guide rod, the second transmission shaft 28 is perpendicular to the second cam structure 27, and when the guide rod 8 moves up and down, one end of the second transmission shaft 28 slides up and down along the surface of the second cam structure 27, so that the second transmission shaft 28 transmits left and right. When one end of the second transmission shaft 28 is on the second cam structure 27, the fourth baffle 31 is disengaged from the vent of the exhaust passage.
Specifically, fig. 9 and 10 are schematic views of a canister vent passage control, where fig. 9 is a schematic view of a vent closed state of the vent passage and fig. 10 is a schematic view of a vent open state of the vent passage. The guide rod 8 is connected with a second transmission shaft 28 through a second cam structure 27, a spring 30 is arranged at the right side of a third baffle plate 29, and the sealing structure is not the structure that the sealing ring closes the ventilation hole, but the ventilation hole is sealed from the outside through the sealing ring by a fourth baffle plate 31.
The invention provides a linear control electric control valve and an electric control fuel system, wherein a first chamber, a second chamber and a third chamber are arranged in a shell of the electric control valve, and the switching device is used for controlling the conduction or the closing of each chamber, so that the linear control electric control valve can be used for solving the problems that the fuel gas in a fuel storage tank is easy to be managed and unreasonably utilized in the existing closed fuel system, the energy waste and the environmental pollution are easy to cause, the control precision of the fuel system can be improved, and the fuel utilization efficiency and the environmental protection effect of a vehicle can be improved.
As shown in fig. 1, an electronically controlled fuel system for linear control includes: the storage tank 1, the carbon tank 3, the electric control valve 5 and the controller 9, and the electric control valve. The air inlet of the electric control valve 5 is connected with the air outlet of the storage tank 1, the first air vent of the electric control valve 5 is connected with the air inlet of the carbon tank 3, and the second air vent of the electric control valve 5 is connected with the engine 2. The controller 9 is in signal connection with the electric control valve 5, and when a vehicle runs or stops, the controller 9 controls the air inlet of the electric control valve 5 to be in sealed isolation with the first air vent and the second air vent. When the storage tank is decompressed or filled, the controller controls the air inlet of the electric control valve to be communicated with the first air vent, so that fuel gas in the storage tank is discharged into the carbon tank. When the carbon tank is desorbed, the controller controls the first vent and the second vent to be communicated, so that fuel gas in the carbon tank is discharged into the engine to be combusted. The storage tank with when the carbon tank carries out the desorption simultaneously, the controller control the air inlet of automatically controlled valve, first blow vent with the second blow vent switches on each other.
Specifically, as shown in fig. 1, an air inlet of the electronic control valve is connected with an air outlet of the storage tank through a first pipeline, a first air port of the electronic control valve is connected with an air inlet of the carbon canister through a second pipeline, and a second air port of the electronic control valve is connected with a fuel inlet of the engine through a third pipeline. The electric control valve controls the circulation of fuel gas among the fuel storage tank, the carbon tank and the engine through an internal structure, and the use of working conditions such as vehicle driving, parking, refueling, desorption and the like is met. The gas pressure in the storage tank and the pressure relief and release of fuel gas are accurately controlled, the complexity of a fuel control system is reduced, systematic management of the whole vehicle is facilitated, the stability of the system performance is guaranteed, and the integration level of the system is improved.
As shown in fig. 1, the system further includes: a pressure sensor 14. The pressure sensor 14 is in signal connection with the controller 9 for detecting the fuel gas pressure in the tank. When the pressure of the fuel gas is greater than a first pressure threshold value, the controller controls the air inlet of the electric control valve to be communicated with the first air vent, so that the fuel gas in the storage tank is discharged into the carbon tank.
As shown in fig. 1, the system further includes: a level sensor 15. The level sensor 15 is in signal connection with the controller 9 for detecting the fuel level in the tank. When the fuel liquid level is at a set liquid level threshold value, the controller controls the air inlet of the electric control valve to be cut off from the first air vent so as to ensure the volume.
Further, the system further comprises: an OBD detection module (not shown). The OBD detection module with controller signal connection, the OBD detection module sets up the gas vent department of carbon-point tank. When the OBD detection module detects the working condition, the OBD detection module sends a diagnosis request signal, and the controller controls the switching device to switch according to the diagnosis request signal, so that the second cavity is communicated with the first cavity through the first through hole.
In practical application, the OBD detection module can set up in carbon tank joint atmosphere department, and in the testing process, need form malleation or negative pressure in that the storage tank is inside, so need keep external and storage tank passageway to be connected smoothly, other interference channel will close simultaneously, so under OBD detection operating mode, the running state of automatically controlled valve also as shown in figure 3, makes first cavity and second cavity switch on, and the third cavity is in sealed isolation.
Under different working conditions, the working state of each sealing ring can be controlled as shown in table 1. Meanwhile, as shown in fig. 6, when OBD diagnosis and desorption are performed, the stroke control unit is controlled by the controller (engine ECU) to rotate so as to drive the guide rod to extend, and further control the mutual conduction or the closed isolation between the first chamber, the second chamber, or the third chamber. When a vehicle runs, stops or is filled with fuel and jumps, the controller detects the pressure and the liquid level of fuel gas in the storage tank according to the pressure sensor and the liquid level sensor, and then controls the stroke control unit to rotate so as to drive the guide rod to stretch and retract, and the sealing ring is opened or closed.
TABLE 1
As shown in fig. 7 to 9, when the air outlet of the canister is also controlled, the specific working state of the seal ring can be as shown in table 2. The stroke control unit is in signal connection with a controller (which can be an engine controller ECU) and is used for controlling different states of the electric control valve and adapting to different working conditions of the whole vehicle. When the accident or the rollover of the vehicle occur, the electric control valve keeps the first sealing ring 11 in a closed state, so that fuel leakage is avoided, and meanwhile, the situation of fuel leakage cannot occur when the system is powered off due to the fact that the electric control valve belongs to the normally closed state.
Table 2:
meanwhile, the control flow of the controller to the electric control valve is as shown in fig. 11, when OBD diagnosis and desorption are performed, the stroke control unit is controlled to rotate by the controller (engine ECU) to drive the guide rod to extend, and then the first seal ring, the second seal ring, the third seal ring and the fourth seal ring are controlled to be closed or opened. When the vehicle runs, stops or is filled and jumped the rifle, the controller detects fuel gas pressure and liquid level in the storage tank according to pressure sensor and level sensor, and then control stroke control unit rotates to it is flexible to drive the guide arm, realizes opening or closing of first sealing washer, second sealing washer, third sealing washer and fourth sealing washer.
Further, as shown in fig. 12, the system further includes: the valve is turned over. The overturning valve is arranged between an exhaust port of the storage tank and an air inlet of the electric control valve, and the overturning valve cuts off the pipeline conduction between the storage tank and the electric control valve when the vehicle turns over or the roll angle is larger than a set angle threshold value.
In practical application, when the vehicle is in a special working condition, such as a circuit failure, a stroke control unit failure and the like, the electric control valve fails, and the vehicle rolls over or rolls over at a larger angle, a roll-over valve can be added between the electric control valve and the storage tank, and the roll-over valve can be arranged on the storage tank, a pipeline between the storage tank and the electric control valve or on the electric control valve. The roll-over valve can be but not limited to the structure shown in fig. 12, when the vehicle is in a special working condition such as a roll-over or a roll with a larger angle, under the action of gravity and a spring 95, a float 94 in a housing 91 of the roll-over valve, a bowl-shaped sealing ring 93 closes an opening of the baffle plate 62, and the bowl-shaped sealing ring 93 has a better sealing effect under the pressure of liquid fuel, so that the fuel can be prevented from flowing into the electric control valve, further the fuel can be leaked, and a larger accident can be caused. Under other working conditions, the turnover valve keeps an opening state, and the electric control valve keeps smooth ventilation.
The invention provides a linear control electric control fuel system, which controls an electric control valve to exhaust the fuel storage tank and release the fuel gas desorbed by a carbon tank and the storage tank through a controller. The problems that fuel gas in a fuel storage tank is easy to discharge and utilize unreasonably, energy waste and environmental pollution are easy to cause in an existing closed fuel system are solved, the electronic control precision of the fuel system can be improved, and the fuel utilization efficiency and the environmental protection effect of a vehicle are improved.
The construction, features and functions of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the present invention is not limited to the embodiments shown in the drawings, and all equivalent embodiments modified or modified by the spirit and scope of the present invention should be protected without departing from the spirit of the present invention.
Claims (11)
1. A linearly controlled, electrically controlled valve, comprising: a housing and a switching device;
a first chamber, a second chamber and a third chamber are arranged in the shell, the first chamber is provided with an air inlet of the electric control valve, the second chamber is provided with a first vent, and the third chamber is provided with a second vent;
the switching device is used for controlling the first chamber, the second chamber and the third chamber to be communicated or isolated in a closed mode.
2. A linearly controlled, electrically controlled valve according to claim 1, wherein one side of said second chamber is connected to said first chamber and the other side of said second chamber is connected to said third chamber;
the second chamber is provided with a first through hole and a second through hole, the second chamber is communicated with the first chamber through the first through hole, and the second chamber is communicated with the third chamber through the second through hole;
the switching device controls the conduction or the sealing of the first through hole and the second through hole to realize the mutual conduction or the closed isolation among the first chamber, the second chamber and the third chamber.
3. The linearly controlled, electrically controlled valve according to claim 2, wherein the switching means comprises: the device comprises a stroke control unit, a guide rod, a return spring, a first sealing ring, a second sealing ring and a third sealing ring;
the first sealing ring and the second sealing ring are connected in series on the guide rod, the first sealing ring is located in the first cavity, the second sealing ring is located in the second cavity, and the first sealing ring and the second sealing ring are respectively located on two sides of the first through hole and used for adjusting the opening degree of the first through hole;
the third sealing ring is arranged in the third chamber, the reset spring is arranged in the third chamber, one end of the reset spring is connected with the bottom surface of the third chamber, and the other end of the reset spring is connected with the third sealing ring, so that the third sealing ring seals the second through hole under the action of the reset spring;
the guide rod penetrates through the first through hole and is located in the first cavity and the second cavity, the stroke control unit drives the guide rod to move up and down, and when the guide rod moves downwards and penetrates through the second through hole, the guide rod pushes the third sealing ring to move downwards, so that the third cavity and the second cavity are communicated with each other.
4. The linearly controlled, electrically controlled valve according to claim 3, further comprising: an emission control device;
a discharge channel is arranged in the first chamber, an exhaust port is arranged at the end part of the discharge channel, a communication hole is arranged on the side wall of the discharge channel, and the communication hole is connected with the exhaust port of the carbon tank;
the discharge control device is arranged in the discharge channel and used for controlling the conduction or isolation of the vent of the discharge channel and the outside.
5. The linearly controlled, electrically controlled valve according to claim 4, wherein the discharge control means comprises: the first cam structure, the first transmission shaft, the first spring, the first baffle, the second baffle and the fourth sealing ring;
the first baffle plate and the second baffle plate are connected in series on the first transmission shaft, the second baffle plate is arranged on one side, away from the vent hole of the discharge channel, of the communication hole, and the first baffle plate is arranged on the left side of the second baffle plate;
one end of the first spring is fixed with the first baffle plate, and the other end of the first spring is fixed with the second baffle plate;
the first cam structure is arranged on the guide rod, the first transmission shaft is perpendicular to the first cam structure, and when the guide rod moves up and down, one end of the first transmission shaft slides up and down along the surface of the first cam structure, so that the first transmission shaft is driven left and right;
the fourth sealing ring is arranged at the end part of the other end of the first transmission shaft, and when one end of the first transmission shaft is located on the first cam structure, the fourth sealing ring blocks the air vent of the exhaust channel.
6. The linearly controlled, electrically controlled valve according to claim 4, wherein the discharge control means comprises: the second cam structure, the second transmission shaft, the second spring, the third baffle and the fourth baffle;
one end of the second spring is fixed with the third baffle plate, and the other end of the second spring is fixed with the fourth baffle plate;
the third baffle plate and the fourth baffle plate are connected on the second transmission shaft in series, the third baffle plate is arranged on one side of the communication hole, which is far away from the vent hole of the discharge channel, and the fourth baffle plate is arranged on the outer side of the vent hole of the exhaust channel and blocks the vent hole of the exhaust channel;
the second cam structure is arranged on the guide rod, the second transmission shaft is perpendicular to the second cam structure, and when the guide rod moves up and down, one end of the second transmission shaft slides up and down along the surface of the second cam structure, so that the second transmission shaft is driven left and right;
when one end of the second transmission shaft is positioned on the second cam structure, the fourth baffle is separated from the vent of the exhaust channel.
7. An electronically controlled fuel system for a linearly controlled vehicle, comprising: a tank, a canister and a controller, and an electrically controlled valve according to any one of claims 1-6;
an air inlet of the electric control valve is connected with an air outlet of the storage tank, a first air vent of the electric control valve is connected with an air inlet of the carbon tank, and a second air vent of the electric control valve is connected with an engine;
the controller is in signal connection with the electric control valve, and controls the air inlet of the electric control valve to be in sealed isolation with the first air vent and the second air vent when a vehicle runs or stops;
when the storage tank is decompressed or filled, the controller controls the air inlet of the electric control valve to be communicated with the first air vent, so that fuel gas in the storage tank is discharged into the carbon tank;
when the carbon tank is desorbed, the controller controls the first vent hole and the second vent hole to be communicated, so that the fuel gas in the carbon tank is discharged into an engine to be combusted;
the storage tank with when the carbon tank carries out the desorption simultaneously, the controller control the air inlet of automatically controlled valve, first blow vent with the second blow vent switches on each other.
8. The linearly controlled vehicle electronically controlled fuel system according to claim 7, further comprising: a pressure sensor;
the pressure sensor is in signal connection with the controller and is used for detecting the pressure of the fuel gas in the storage tank;
when the pressure of the fuel gas is greater than a first pressure threshold value, the controller controls the air inlet of the electric control valve to be communicated with the first air vent, so that the fuel gas in the storage tank is discharged into the carbon tank.
9. The linearly controlled vehicular electronic control fuel system according to claim 7 or 8, characterized by further comprising: a liquid level sensor;
the liquid level sensor is in signal connection with the controller and is used for detecting the fuel liquid level in the storage tank;
when the fuel liquid level is at a set liquid level threshold value, the controller controls the air inlet of the electronic control valve to be cut off from the first air vent.
10. The linearly controlled vehicle electronically controlled fuel system according to claim 9, further comprising: an OBD detection module;
the OBD detection module is in signal connection with the controller and is arranged at an exhaust port of the carbon tank;
when the OBD detection module detects the working condition, the OBD detection module sends a diagnosis request signal, and the controller controls the switching device to switch according to the diagnosis request signal, so that the second cavity is communicated with the first cavity through the first through hole.
11. The linearly controlled vehicle electronically controlled fuel system according to claim 7, further comprising: a roll-over valve;
the overturning valve is arranged between an exhaust port of the storage tank and an air inlet of the electric control valve, and the overturning valve cuts off the pipeline conduction between the storage tank and the electric control valve when the vehicle turns over or the roll angle is larger than a set angle threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011133247.2A CN112269369A (en) | 2020-10-21 | 2020-10-21 | Linear control electric control valve and electric control fuel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011133247.2A CN112269369A (en) | 2020-10-21 | 2020-10-21 | Linear control electric control valve and electric control fuel system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112269369A true CN112269369A (en) | 2021-01-26 |
Family
ID=74342782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011133247.2A Withdrawn CN112269369A (en) | 2020-10-21 | 2020-10-21 | Linear control electric control valve and electric control fuel system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112269369A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026533A (en) * | 2023-03-28 | 2023-04-28 | 苏州恩都法汽车系统股份有限公司 | Switching device, diagnosis system and diagnosis method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382100A (en) * | 2008-10-14 | 2009-03-11 | 宁波利凯特环保科技有限公司 | Motorcycle fuel vaporization and discharge control system |
| CN101881241A (en) * | 2010-07-16 | 2010-11-10 | 浙江吉利汽车研究院有限公司 | Three-way valve for automobile canister |
| DE102013010556A1 (en) * | 2013-06-25 | 2015-01-08 | Steuerungstechnik Staiger GmbH & Co. KG | Valve |
| US20190003306A1 (en) * | 2017-06-29 | 2019-01-03 | De Poan Pneumatic Corp. | Gas passage switching structure for pneumatic rotary hand tool |
| CN208778122U (en) * | 2018-08-24 | 2019-04-23 | 亚普汽车部件股份有限公司 | A kind of new electronic control high-pressure fuel oil system |
| CN209100156U (en) * | 2018-08-24 | 2019-07-12 | 亚普汽车部件股份有限公司 | A kind of electronic control module for high-pressure fuel oil system |
| CN110594459A (en) * | 2019-10-15 | 2019-12-20 | 斯丹德汽车系统（苏州）有限公司 | Integrated oil tank isolating valve |
-
2020
- 2020-10-21 CN CN202011133247.2A patent/CN112269369A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382100A (en) * | 2008-10-14 | 2009-03-11 | 宁波利凯特环保科技有限公司 | Motorcycle fuel vaporization and discharge control system |
| CN101881241A (en) * | 2010-07-16 | 2010-11-10 | 浙江吉利汽车研究院有限公司 | Three-way valve for automobile canister |
| DE102013010556A1 (en) * | 2013-06-25 | 2015-01-08 | Steuerungstechnik Staiger GmbH & Co. KG | Valve |
| US20190003306A1 (en) * | 2017-06-29 | 2019-01-03 | De Poan Pneumatic Corp. | Gas passage switching structure for pneumatic rotary hand tool |
| CN208778122U (en) * | 2018-08-24 | 2019-04-23 | 亚普汽车部件股份有限公司 | A kind of new electronic control high-pressure fuel oil system |
| CN209100156U (en) * | 2018-08-24 | 2019-07-12 | 亚普汽车部件股份有限公司 | A kind of electronic control module for high-pressure fuel oil system |
| CN110594459A (en) * | 2019-10-15 | 2019-12-20 | 斯丹德汽车系统（苏州）有限公司 | Integrated oil tank isolating valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026533A (en) * | 2023-03-28 | 2023-04-28 | 苏州恩都法汽车系统股份有限公司 | Switching device, diagnosis system and diagnosis method |
| CN116026533B (en) * | 2023-03-28 | 2023-09-05 | 苏州恩都法汽车系统股份有限公司 | Diagnostic system and diagnostic method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190353121A1 (en) | Electrically controlled fuel system module | |
| CN103282637B (en) | It is alternatively used for the regeneration of box ventilation system or performs the device of case leak diagnostics | |
| CN103498739B (en) | For the method for fuel vapo(u)r control | |
| US9242551B2 (en) | Ventilation device for the fuel system of a hybrid vehicle | |
| JP5299565B2 (en) | Fuel tank system | |
| KR102079848B1 (en) | Vehicle storage system with vapour control | |
| WO2022111645A1 (en) | Energy-saving electric control valve and electric control fuel system | |
| CN105134422A (en) | Vehicle-mounted oil filling and oil and gas recycling system and automobile with same | |
| WO2022083672A1 (en) | Electric control valve and fuel system | |
| JP2012071812A (en) | Fuel tank valve structure of hybrid vehicle in which evaporative emission can be controlled | |
| CN112269369A (en) | Linear control electric control valve and electric control fuel system | |
| CN112361028A (en) | Fuel oil electric control valve, electric control fuel oil system and control method | |
| CN114379356A (en) | Diagnostic method for pressureless fuel tank | |
| CN206668430U (en) | A kind of vehicle-mounted oil vapor recovery device | |
| CN201198798Y (en) | Fuel evaporation control device of motorcycle | |
| CN211202150U (en) | Hybrid electric vehicle fuel steam emission control system and vehicle | |
| CN201778917U (en) | Tipping valve | |
| CN113818974B (en) | Electric control component of fuel system and fuel system control method | |
| JP6399278B2 (en) | Vehicle fuel tank system | |
| US11698045B2 (en) | Electrically controlled fuel system module | |
| CN112594096A (en) | Electric control valve, electric control fuel system and control method | |
| CN114233532A (en) | Flexible electric control valve, electric control fuel system and control method of electric control valve | |
| CN112576422A (en) | Electric control valve, fuel system and fuel filling method | |
| CN113931769B (en) | Integrated electric control assembly of fuel system and fuel system control method | |
| CN201972814U (en) | Fuel oil adsorption device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210126 |
|
| WW01 | Invention patent application withdrawn after publication |