阅读说明：本技术 电控集成阀及其控制方法、及燃料系统和车辆 (Electric control integrated valve, control method thereof, fuel system and vehicle ) 是由 顾峰 刘凡 惠炳威 于 2021-07-22 设计创作，主要内容包括：本发明涉及一种电控集成阀及其控制方法、及燃料系统和车辆,包括通过第一连通口连通的第一腔室和第二腔室,第一腔室内设有浮动部件,浮动部件活动设于第一腔室中,且浮动部件靠近第一连通口运动时封堵第一连通口；第二腔室内设有封堵部件和电控驱动装置,封堵部件活动设于第二腔室中,封堵部件靠近第一连通口运动时封堵第一连通口,并在电控驱动装置驱动下远离第一连通口运动打开第一连通口,与现有技术相比,本发明基于浮力、重力以及弹力实现液位限制阀和工作排气阀在垂直方向上的集成,不需要通过额外的液位信号实现燃料箱的加注容积控制等,也不需要通过额外的压力信号实现燃料系统的泄压控制,提高了可靠性。(The invention relates to an electric control integrated valve, a control method thereof, a fuel system and a vehicle, wherein the electric control integrated valve comprises a first cavity and a second cavity which are communicated through a first communication port, a floating component is arranged in the first cavity, the floating component is movably arranged in the first cavity, and the floating component blocks the first communication port when moving close to the first communication port; compared with the prior art, the invention realizes the integration of the liquid level limiting valve and the working exhaust valve in the vertical direction based on buoyancy, gravity and elasticity, does not need to realize the filling volume control of a fuel tank and the like through extra liquid level signals, does not need to realize the pressure relief control of a fuel system through extra pressure signals, and improves the reliability.)

1. An electronically controlled integrated valve for a fuel system, comprising:

the device comprises a first chamber (110) and a second chamber (120) which are communicated through a first communication port (112), wherein an opening (113) is formed in the first chamber (110), a second communication port (122) is formed in the second chamber (120), and the first chamber (110) is located below the second chamber (120);

a floating part (111) is arranged in the first chamber (110), the floating part (111) is movably arranged in the first chamber (110), and the floating part (111) closes the first communication port (112) when moving close to the first communication port (112);

the sealing device is characterized in that a sealing part (121) and an electric control driving device (123) are arranged in the second chamber (120), the sealing part (121) is movably arranged in the second chamber (120), the sealing part (121) seals the first communication port (112) when moving close to the first communication port (112), and moves away from the first communication port (112) to open the first communication port (112) under the driving of air pressure in the electric control driving device (123) or the first chamber (110).

2. The electronically controlled integrated valve for a fuel system according to claim 1, wherein the electronically controlled actuating device (123) is an electromagnet, and the blocking member (121) is provided with a soft magnet.

3. An electrically controlled integration valve of a fuel system according to claim 1, characterized in that a first spring is further provided in the first chamber (110), and the floating member (111) is connected to the inner wall of the first chamber (110) via the first spring.

4. An electrically controlled integrated valve for a fuel system according to claim 1, characterized in that a second spring is arranged in the second chamber (120), and the blocking member (121) is connected to the inner wall of the second chamber (120) through the second spring.

5. An electrically controlled integrated valve for a fuel system according to claim 1, characterized in that a guiding structure (114) for limiting the floating component (111) is further provided in the first chamber (110).

6. A control method of an electronically controlled integrated valve of a fuel system according to any one of claims 1 to 5, comprising:

when the engine is in a stop state and the opening of the filling opening of the fuel tank is detected, the electronic control driving device (123) is controlled to drive the blocking part (121) to move away from the first communication opening (112),

when receiving an operating signal for starting the leakage diagnosis, the electronic control driving device (123) is controlled to drive the blocking part (121) to move away from the first communication port (112).

7. A fuel system comprising a fuel tank (200) and a controller (500), said controller (500) being connected to a filler door (300) and to an engine (800), characterized in that the system further comprises an electronically controlled integrated valve according to any one of claims 1-5, said electronically controlled integrated valve being provided in the fuel tank (200), said controller (500) being further connected to an electronically controlled drive means (123) of the electronically controlled integrated valve, said controller (500) being configured to perform the steps of:

when the engine is in a stop state and the filling small door (300) is opened, the electronic control driving device (123) is controlled to drive the blocking component (121) to move away from the first communication port (112).

8. The fuel system of claim 7, further comprising a canister (400), the canister (400) being connected to an engine (800) by a canister solenoid valve (700), the second communication port (122) of the electronically controlled integration valve being connected to the canister (400).

9. The fuel system of claim 8, further comprising a leak diagnosis assistance device (600), the leak diagnosis assistance device (600) being connected to the canister (400) and being connected to the controller (500), the controller (500) being configured to further perform the steps of:

when receiving an operating signal for starting the leakage diagnosis by the leakage diagnosis auxiliary device (600), the electronic control driving device (123) is controlled to drive the blocking component (121) to move away from the first communication port (112).

10. A vehicle comprising a fuel system according to any one of claims 7 to 9.

Technical Field

The invention relates to an electric control integrated valve of a fuel system and application thereof, in particular to an electric control integrated valve and a control method thereof, a fuel system and a vehicle.

Background

Fuel systems typically use a level limiting valve to control the level height, which typically needs to be placed at the center highest point of the fuel tank in order to increase vehicle range and reduce fill volume errors at tilt angles. However, since fuels such as gasoline and methanol are volatile, in order to ensure the safety of the fuel system, it is usually necessary to configure a working exhaust valve to ensure that the fuel system can still exhaust air at large inclination angles such as front, back, left and back, and the like, and to obtain an exhaust space with a large inclination angle and reduce the number of the working exhaust valves, the working exhaust valve is usually required to be arranged at the highest position of the center of the fuel tank, so that the fuel system needs to meet the arrangement requirements of a plurality of valves when being designed.

Although some prior art solutions solve the above technical problem by using an electrically controlled valve and a fuel level sensor arranged in a longitudinal direction, the reliability is reduced and the cost is high because the level sensor needs to be additionally added to obtain a level signal.

In addition, due to the implementation of the function requirement of the ORVR (on board refueling vapor recovery), the filling exhaust channel and the working exhaust channel are combined and connected to the carbon canister, so that the original pressure maintaining capacity of the fuel system cannot play a role under the condition of not full liquid level, and the load requirement and the desorption requirement of the carbon canister are increased. In the prior art, for example, patent application No. CN2020113585358 discloses an energy-saving type electronic control valve and an electronic control fuel system, wherein a driving source is connected with a guide rod to control opening and closing of a channel, so as to block communication between a fuel tank and a carbon canister, prevent oil vapor from entering the carbon canister, cause excessive load on the carbon canister, and reduce environmental pollution; the opening of the channel can be controlled by controlling the moving distance of the driving source, and the volume can be accurately controlled in the processes of filling and replenishing fuel. For example, patent application No. CN2020111390336 discloses an electric control valve and a fuel system, which are driven by a motor to open and close a fuel tank and a carbon canister channel and control the opening and closing of a fuel vapor channel, so that the fuel vapor pressure and the storage and release of the fuel vapor can be accurately controlled, the carbon canister load is reduced, and the emission is reduced. However, the above cases are mainly applied to a closed high-pressure fuel system, and at the same time, a liquid level sensor or a liquid level detection mechanism needs to be additionally arranged to acquire a liquid level signal, and a pressure sensor or a pressure detection mechanism needs to be additionally arranged to acquire a pressure signal to manage the opening and closing of the electric control valve, so that the control is complex and the cost is high.

Disclosure of Invention

The invention aims to provide an electric control integrated valve, a control method thereof, a fuel system and a vehicle, wherein a first cavity and a second cavity which are communicated through a first communication port are arranged up and down, so that integration of two valves can be completed at the same horizontal position, the lower first cavity adopts a normally open design, the functions of a liquid level limiting valve can be realized by overcoming gravity and possible friction force through buoyancy, the upper second cavity adopts a normally closed design, the opening and resetting of a plugging component are controlled by overcoming the gravity of the plugging component through an electric driving mode or pressure, the function of a working exhaust valve is realized, power supply is not needed under normal working conditions, filling volume control of a fuel tank is not needed through additional liquid level signals, and pressure relief control of the fuel system is not needed through additional pressure signals.

The purpose of the invention can be realized by the following technical scheme:

an electronically controlled integration valve for a fuel system, comprising:

the first cavity is provided with an opening, the second cavity is provided with a second communication port, and the first cavity is positioned below the second cavity;

a floating part is arranged in the first cavity, the floating part is movably arranged in the first cavity, and the floating part blocks the first communication port when moving close to the first communication port;

the sealing device is characterized in that a sealing part and an electric control driving device are arranged in the second cavity, the sealing part is movably arranged in the second cavity, the first communication port is sealed when the sealing part moves close to the first communication port, and the sealing part moves away from the first communication port under the driving of air pressure in the electric control driving device or the first cavity to open the first communication port.

Furthermore, the electric control driving device is an electromagnet, and a soft magnet is arranged on the plugging component.

Further, still be equipped with first spring in the first chamber, the floating member passes through the inner wall that first spring is connected to the first chamber.

Furthermore, a second spring is arranged in the second cavity, and the plugging component is connected to the inner wall of the second cavity through the second spring.

Furthermore, a guide structure for limiting the floating component is further arranged in the first cavity.

Another aspect of the present invention provides a control method of an electronic control integrated valve of a fuel system as described above, including:

when the engine is in a stop state and the opening of the filling opening of the fuel tank is detected, the electronic control driving device is controlled to drive the blocking component to move away from the first communication opening,

and when receiving a working signal for starting leakage diagnosis, controlling the electric control driving device to drive the blocking component to move away from the first communication port.

A further aspect of the invention provides a fuel system comprising a fuel tank and a controller connected to a filler valve and an engine, the system further comprising an electronically controlled integrated valve as described above provided in the fuel tank, the controller further connected to an electronically controlled drive means of the electronically controlled integrated valve, the controller being configured to perform the steps of:

when the engine is in a stop state and the filling small door is opened, the electronic control driving device is controlled to drive the blocking component to move away from the first communication port.

Further, the system also comprises a carbon tank, the carbon tank is connected to the engine through a carbon tank electromagnetic valve, and a second communication port of the electric control integrated valve is connected to the carbon tank.

Further, the system further comprises a leak diagnosis assistance device connected to the canister and connected to the controller, the controller being configured to further perform the steps of:

and when receiving a working signal for starting the leakage diagnosis of the leakage diagnosis auxiliary device, controlling the electronic control driving device to drive the blocking component to move away from the first communication port.

A vehicle comprises a fuel system as described above.

Compared with the prior art, the invention has the following beneficial effects:

1) the upper and lower setting of first cavity and the second cavity that will communicate through first intercommunication mouth, thereby can realize accomplishing the integration of two kinds of valves at same horizontal position, reduce inclined position volume deviation, fuel system's work exhaust inclination has been increased, the first cavity of below adopts normally open design, utilize buoyancy to overcome gravity, and the effect such as frictional force that probably exists can play the effect of liquid level limiting valve, the second cavity of top then adopts normally closed design, utilize electric drive mode or pressure to overcome opening and resetting of mode control shutoff part of shutoff part gravity, play the effect of work discharge valve, need not the power supply under the normal operating mode, need not realize the filling volume control of fuel tank through extra liquid level signal, need not realize fuel system's pressure release control through extra pressure signal.

2) The electric control driving device is realized by adopting an electromagnetic technology, and the reliability is strong.

3) The first spring can increase the resistance of the floating component to rise and improve the reset speed.

4) The second spring can improve the threshold air pressure of state change, improves the speed of restoring to the throne, through rationally collocating gravity and elastic modulus, can adjust the rated pressure of fuel cell, improves adaptability.

5) The guide structure can improve the stability of the floating component.

6) By arranging the plugging component above the liquid level limiting valve, the electronic control system has a closing function on a filling exhaust channel when not working, so that the pressure maintaining of a fuel system is realized when the liquid level is not full under the ORVR function requirement, and the load of a carbon tank is reduced; the fuel tank is closed in the desorption process of the vehicle, so that the desorption gas flow is prevented from extracting gas in the fuel tank, and the desorption efficiency of the carbon canister is improved.

7) The single output signal of the electric control driving device can be suitable for the working conditions of filling, leakage detection, pressure maintaining and pressure relief.

Drawings

Fig. 1 is a schematic structural diagram of an electrically controlled integrated valve in example 1 of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an electrically controlled integrated valve in example 2 of the first embodiment of the invention;

fig. 3 is a schematic structural diagram of an electrically controlled integrated valve in a first chamber in embodiment 3 of the first embodiment of the invention;

fig. 4 is a schematic top view of an electrically controlled integration valve floating member according to a first embodiment 3 of the present invention;

FIG. 5 is a schematic structural view of the inside of a second chamber in example 3 of a second embodiment of the present invention;

FIG. 6 is a schematic structural view of a fuel system according to a second embodiment of the present invention;

wherein: 110. the leakage diagnosis device comprises a first chamber, a floating component, a first communication port, a first opening, a second opening, a guide structure, a second chamber, a sealing component, a second connecting port, a second connecting.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Implementation mode one

A first embodiment of the present invention provides an electronically controlled integrated valve for a fuel system,

in example 1 of the present embodiment, the electronically controlled integrated valve includes a first chamber 110 and a second chamber 120 that are communicated through a first communication port 112, an opening 113 is provided on the first chamber 110, a second communication port 122 is provided on the second chamber 120, and the first chamber 110 is located below the second chamber 120;

a floating part 111 is arranged in the first chamber 110, the floating part 111 is movably arranged in the first chamber 110, and the floating part 111 closes the first communication port 112 when moving close to the first communication port 112;

a blocking part 121 and an electric control driving device 123 are arranged in the second chamber 120, the blocking part 121 is movably arranged in the second chamber 120, the first communication port 112 is blocked when the blocking part 121 moves close to the first communication port 112, and the first communication port 112 is opened when the blocking part 121 moves away from the first communication port 112 under the driving of the air pressure in the electric control driving device 123 or the first chamber 110.

The electric control driving device 123 is an electromagnet, a soft magnet is arranged on the blocking component 121, and the blocking component 121 can be adsorbed or not adsorbed by simple on-off control of the electromagnet, so that the floating component 111 forms a normally open switch for the first communication port 112, and the blocking component 121 forms a normally closed switch for the first communication port 112.

In this embodiment, a first spring is further disposed in the first chamber 110, the floating member 111 is connected to the bottom of the inner wall of the first chamber 110 through the first spring, a second spring is further disposed in the second chamber 120, and the blocking member 121 is connected to the inner wall of the second chamber 120 through the second spring. A guide structure 114 for limiting the floating member 111 is further disposed in the first chamber 110. Based on this, when the fluid fuel enters the first chamber 110 from the opening 113 to a certain level, the buoyancy provided by the fluid fuel to the floating member 111 exceeds the self-gravity and the friction of the floating member 111, the further rise of the liquid level starts to overcome the elastic force of the first spring to drive the floating member 111 to rise, and as the liquid level rises, the top of the floating member 111 finally completely blocks the first communication port 112. In addition, for the second chamber 120, the blocking component 121 is opened in two situations, one is a passive opening mode, specifically, after the air pressure in the fuel tank increases until the upward pressure provided to the blocking component 121 exceeds the self-gravity of the blocking component 121, along with the further increase of the pressure, the elastic force of the second spring starts to be overcome, because the floating component 111 is normally open, after the blocking component 121 is jacked up, the pressure relief can be completed, and because the blocking component 121 is normally closed at ordinary times, the pressure maintaining can be realized, and the other is active opening, specifically, the coil of the electric control driving device 123 is electrified, so that the magnetic force adsorption is provided, and the blocking component 121 moves upward to open.

The opening direction of the blocking member 121 may be upward movement as shown in fig. 1, or may be upward movement in an inclined manner, but the upward movement may save space, reduce design difficulty, and have higher reliability in other embodiments, in addition, the opening hole 113 may be disposed on the side wall of the first chamber 110 as shown in fig. 1, or may be disposed at the bottom of the first chamber 110, and the second communication port 122 may be disposed on the side wall of the second chamber 120 as shown in fig. 1, or may be disposed at the top of the second chamber 120, or the like. In some other embodiments, any element or any combination of elements of the first spring, the second spring, and the guide structure 114 may be omitted. The first spring or the second spring is omitted and then is reset only by gravity, so that the resetting speed is slowed, and in addition, the lost spring elasticity needs to be compensated by gravity, so that the mass of the whole electronic control integrated valve can be increased, and the light weight of a vehicle is not facilitated. In some cases, a sealing member may be further provided on the floating member 111 and/or the blocking member 121 to improve the sealing effect with respect to the first communication port 112.

In example 2 of this embodiment, as shown in fig. 2, the design of the first spring can be modified, instead of being connected to the bottom of the first chamber 110, and optionally being connected to the top, which can provide a shorter height product, but requires more material, and a larger cross-sectional area, and occupies a larger horizontal space.

In example 3 of this embodiment, as shown in fig. 3 and 4, the edge of the floating member 111 is designed to be closely attached to the sidewall of the first chamber 110, and a longitudinally penetrating hollow is formed thereon, so that the fluid fuel can enter and pass through the hollow, thereby omitting the guide structure 114, not affecting the stability of the movement of the guide structure 114, and increasing the volume of the discharged liquid.

In embodiment 4 of this embodiment, as shown in fig. 5, the electrically controlled driving device 123 adopts a wire winding motor, an output shaft is connected to the upper surface of the blocking member 121, and the blocking member 121 is driven to move upward against the elastic force and the gravity of the second spring to open the first communicating port 112 by tightening the wire winding motor, the number and the arrangement position of the wire winding motor and the arrangement manner of the second spring can be adjusted as required, and since the wire winding does not provide a downward supporting force, when the air pressure in the first chamber 110 is too high, the blocking member 121 can be jacked up as well, although the electrically controlled driving device 123 can adopt other forms in other embodiments.

Without being contradicted, one skilled in the art can accomplish the mutual recombination of the elements in the above embodiments without any inventive work to constitute a new embodiment.

A second embodiment of the present application provides a control method of the above-mentioned fuel system electronically controlled integrated valve, which is specifically implemented in the form of a computer program, and includes:

when the engine is in a stop state and the opening of the filling opening of the fuel tank is detected, the electric control driving device 123 is controlled to drive the blocking part 121 to move away from the first communication opening 112,

when receiving an operation signal for starting the leak diagnosis, the electronically controlled driving device 123 is controlled to drive the blocking member 121 to move away from the first communication port 112.

The filler opening of the fuel tank may be in the form of a filler door, wherein the filler door is not necessarily a component on the fuel tank, and under the working conditions except the above filling and leakage diagnosis, the blocking component 121 is in a normally closed state, and the whole electrically-controlled integrated valve does not consume any power.

A fuel system according to a third embodiment of the present application, as shown in fig. 6, includes a fuel tank 200 and a controller 500, the controller 500 being connected to a filler door 300 and an engine 800, the system further including an electronically controlled integration valve as in any one of the first embodiments, the electronically controlled integration valve being provided in the fuel tank 200, the controller 500 being further connected to an electronically controlled drive device 123 of the electronically controlled integration valve, the controller 500 being configured to perform the steps of:

when the engine is in a stop state and the filling port 300 is opened, the electronic control driving device 123 is controlled to drive the blocking part 121 to move away from the first communication port 112.

Based on the above design, in the filling operation mode, the controller 500 receives a signal that the engine 800 is in a stop state, when it is recognized that the filling small door 300 is opened, the filling mode is entered, the controller 500 sends a signal to the electronic control integrated valve 110, the electronic control driving device 123 operates, the blocking member 121 moves upward, the first communication port 112 is opened, when fuel is filled, gas in the fuel tank 200 enters the electronic control integrated valve 110 from the opening hole 113, flows through the first communication port 112, enters the canister 400 from the second communication port 122, and after adsorption of the canister 400, clean air flows through the leak diagnosis assisting device 600 and is discharged outward. At this time, the canister solenoid valve 700 is not operated and is in a closed state, and the leak diagnosis assistance apparatus 600 is not operated and is in an open state. When the fuel reaches the opening 113, the fuel floats the floating member 111, closes the first communication port 112, and increases the pressure in the fuel tank to cause the gun to jump, thereby controlling the filling volume.

Under pressure maintaining and pressure releasing working conditions, the controller 500 receives a closing signal of the filling small door 300, the leakage diagnosis auxiliary device 600 does not work, the controller 500 stops sending a signal to the electric control integrated valve 110, the electric control driving device 123 stops working, the plugging part 121 moves downwards under the action of elasticity and gravity to close the first communication port 112, pressure maintaining on the fuel tank is achieved, and at the moment, the leakage diagnosis auxiliary device 600 does not work and is in an opening state. When the pressure generated in the fuel tank is greater than the elastic force and the gravity of the blocking component 121, the blocking component 121 is passively opened to release the pressure, and after the pressure release is completed, the first communication port 112 is closed again under the action of the elastic force and the gravity, so that the pressure maintaining of the fuel tank 200 is realized, and the load of the carbon canister is reduced. Meanwhile, the fuel tank is closed under the non-filling working condition and the leakage diagnosis working condition, and in the desorption process of opening the carbon canister electromagnetic valve 700, desorption gas flow is prevented from extracting gas in the fuel tank, and the carbon canister desorption efficiency is improved.

In some embodiments, the system further includes canister 400, canister 400 being connected to engine 800 via canister solenoid valve 700, and second communication port 122 of the electronically controlled integrated valve being connected to canister 400.

In some embodiments, the system further comprises a leak diagnosis assistance device 600, the leak diagnosis assistance device 600 being connected to the canister 400 and to the controller 500, the controller 500 being configured to further perform the steps of:

when receiving an operation signal for starting the leakage diagnosis by the leakage diagnosis assisting apparatus 600, the electronically controlled driving apparatus 123 is controlled to drive the blocking member 121 to move away from the first communication port 112.

Based on the above design, under the working condition of leak diagnosis, the controller 500 receives the working signal of the leak diagnosis assisting device 600, the controller 500 gives a signal to the electric control integrated valve 100, the electric control driving device 123 works, the blocking component 121 moves upwards, the first communicating port 112 is opened, so that whether leak exists in the fuel tank 200 can be detected by air pressure, at this time, the canister electromagnetic valve 700 does not work and is in a closed state, after diagnosis is completed, the electric control driving device 123 stops working, and the blocking component 121 moves downwards by elasticity and gravity, and the first communicating port 112 is closed.

In a fourth embodiment of the present application, a vehicle is provided comprising a fuel system as described above.