CN113107712B

CN113107712B - A desorption system and vehicle for ORVR motorcycle type

Info

Publication number: CN113107712B
Application number: CN202110344555.8A
Authority: CN
Inventors: 顾峰; 王伟; 郭梦梦
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-02-22
Anticipated expiration: 2041-03-31
Also published as: CN113107712A

Abstract

The invention relates to a desorption system and a vehicle for an ORVR vehicle, comprising a desorption pipe, a carbon canister, a throttling device and a fuel tank, wherein the desorption pipe is connected between an engine and the carbon canister, and the carbon canister The canister is communicated with the outside air through the air vent set on itself, and the canister is also connected with the filling and exhausting valve through the filling and exhausting passage through the fuel tank interface set on itself. The air valve is communicated with the inside of the fuel tank to form a desorption passage, the throttle device is connected and arranged between the fuel tank port and the filling and exhaust passage, and is connected to the desorption through the desorption branch. The attached pipe is connected to throttle the gas from the inside of the fuel tank during desorption. Compared with the prior art, the present invention has the structure of providing a desorption throttling device for the ORVR vehicle model, so that the gas from the inside of the fuel tank is throttled during desorption, and no back pressure is generated when refueling, and the cost is low. inferior advantages.

Description

A desorption system and vehicle for ORVR motorcycle type

Technical Field

The invention relates to the technical field of automobiles, in particular to a desorption system for an ORVR (open road vehicle) type and a vehicle.

Background

Because fuels such as gasoline, methanol and the like have the characteristic of easy volatilization, a large amount of fuel steam is generated in the fuel filling and daily storage processes, and the atmospheric pollution is easily caused without control. At present, the automobile is generally provided with a fuel vapor emission control system, wherein the fuel vapor emission control system comprises a carbon canister, the carbon canister is filled with activated carbon with strong adsorbability and is used for adsorbing fuel vapor, when an automobile engine runs, an engine intake manifold is communicated with the carbon canister, the fuel vapor adsorbed by the carbon canister is desorbed through negative pressure and enters the intake manifold to participate in combustion, the activated carbon is cleaned so as to adsorb new fuel vapor in a fuel tank again, and the purposes of saving fuel and protecting the environment are achieved.

The automobile emission regulations in major regions of the world are gradually tightened, and the pollutant emission requirements in the oil filling process are increased in the light automobile pollutant emission limit value and the measuring method regulations in the sixth stage of China. Most regional and automotive manufacturers typically employ on-board Refueling Vapor Recovery (ORVR) devices to collect fuel vapors from Refueling. The device changes the filling exhaust pipe of the fuel tank from the original atmosphere to the carbon canister, and uses the active carbon in the carbon canister to adsorb the fuel vapor generated during filling. In order to ensure smooth fuel filling in a short time, the through diameter of a filling exhaust pipe is usually larger than that of an exhaust pipe during storage, the filling exhaust pipe is directly communicated with a carbon canister, a pressure maintaining function cannot be usually arranged, and the situation that a gun is jumped ahead of filling or fuel is not filled due to the fact that filling exhaust back pressure is large is prevented.

In view of the above desorption process, since the back pressure of the passage through which the canister communicates with the fuel tank is small, when the back pressure of air flowing through the activated carbon is large, a large flow of gas required for desorption is easily sucked from the fuel tank, and the activated carbon is cleaned by a small flow of gas, so that there is a risk that the fuel tank is deflated, the canister is insufficiently cleaned, the working capacity is reduced, and further, problems such as fuel tank rupture, steam overflow are caused.

In the prior art, for example, patent application with application number CN202010468334.7 discloses a desorption diagnosis method and system for a carbon canister of a vehicle, when desorption diagnosis is performed, whether a check valve is in a damaged normally open state is diagnosed first, and then whether a desorption pipeline has a fault is detected, so that the fault detection accuracy of the desorption pipeline is improved. For example, patent with application number CN202020160782.6 discloses a fuel system protection valve and an automobile, which realizes maintaining pressure balance between a fuel tank and a canister by the structural design of the protection valve; avoid the fuel tank to appear malleation inflation and negative pressure and inhale flat condition, nevertheless this scheme has set up the pressurize on the exhaust latus rectum, is applicable to non-ORVR motorcycle type, communicates fuel tank and canister when the desorption simultaneously, can not avoid inside the main fuel tank of flowing through of desorption flow, leads to the canister to wash insufficient problem.

The problems that the fuel tank is shriveled due to the fact that desorption flow caused by the fact that the vehicle type is provided with the ORVR device mainly flows through the inside of the fuel tank, and the carbon canister is insufficiently cleaned are not solved, and potential risks of fuel tank breakage, fuel vapor overflow and the like exist.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a desorption system for an ORVR (open road vehicle) type and a vehicle.

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

a desorption system for an ORVR vehicle comprises a desorption pipe, a carbon canister, a throttling device and a fuel tank, wherein the desorption pipe is connected between an engine and the carbon canister, the carbon canister is communicated with the outside air through an air vent arranged on the carbon canister, the carbon canister is also connected with a filling exhaust valve through a fuel tank communicating interface arranged on the carbon canister through a filling exhaust channel, the filling exhaust valve is communicated with the inside of the fuel tank to form a desorption passage, and the throttling device is connected between the fuel tank communicating interface and the filling exhaust channel, communicated with the desorption pipe through a desorption branch and used for throttling gas from the inside of the fuel tank during desorption.

Further, the throttling device comprises a shell, a first interface, a second interface and a third interface are arranged on the shell, and the throttling device is respectively and correspondingly connected with the fuel tank connection port, the filling and exhausting channel and the desorption branch through the first interface, the second interface and the third interface.

Furthermore, a flexible diaphragm is arranged in the shell and divides the inner space of the shell into a first chamber and a second chamber.

Furthermore, a partition plate is arranged in the second chamber, and the partition plate is connected with the flexible diaphragm and can slide in the second chamber along with the movement of the flexible diaphragm.

Further, the first port and the second port are communicated with the second chamber, and have a position difference in the moving direction of the partition plate.

Furthermore, a guide structure for limiting the displacement direction of the partition plate is arranged in the second chamber.

Further, the third port is in communication with the first chamber.

Further, the throttling device can be integrally arranged on the filling exhaust valve and used for reducing the number of communicated interfaces and parts.

Further, the throttling device can be integrally arranged on the carbon canister and used for reducing the number of communicated interfaces and parts.

The invention further provides a vehicle comprising the desorption system for the ORVR vehicle type.

Compared with the prior art, the invention has the following advantages:

(1) the invention provides a desorption system for an ORVR (open tank recovery vehicle) vehicle type, which solves the problems that when the ORVR vehicle type is desorbed, desorption flow mainly flows through the inside of a fuel tank, so that the fuel tank is deflated, and a carbon canister is insufficiently cleaned, and reduces personal safety risks caused by the rupture of the fuel tank and risks of environment pollution caused by fuel vapor overflow. And meanwhile, desorption throttling is realized by utilizing desorption vacuum of the engine, and the cost is low.

(2) The invention provides a structure of a desorption throttling device for an ORVR vehicle type, so that gas from the inside of a fuel tank is throttled during desorption, and back pressure is not generated during fuel filling.

(3) The invention realizes the opening and closing of the throttling device by the negative pressure generated by the desorption branch of the engine vacuumization, and has low cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a preferred schematic diagram of a desorption system for an ORVR vehicle type according to the present invention;

FIG. 2 is a schematic structural diagram of a throttling device provided by the present invention in a non-operating state;

FIG. 3 is a schematic structural diagram of a throttling device provided by the present invention in an operating state;

in the figure, 100 is a desorption pipe, 110 is a desorption pipe branch, 200 is a carbon canister, 210 is a fuel tank connection port, 220 is an atmosphere connection port, 230 is a desorption pipe connection port, 300 is a throttling device, 310 is a flexible diaphragm, 320 is a shell, 321 is a first chamber, 322 is a second chamber, 330 is a partition plate, 340 is a first connection port, 350 is a second connection port, 360 is a third connection port, 400 is a fuel tank, 410 is a charging exhaust passage, 420 is a charging exhaust valve, and 500 is an engine.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The desorption system for the ORVR vehicle type, as shown in figure 1, comprises: desorption pipe 100, canister 200, throttle device 300, fuel tank 400;

the desorption pipe 100 is connected with the engine 500 and a through desorption pipe interface 230 of the carbon canister 200, the carbon canister 200 is communicated with the outside air through an air vent 220, a fuel through tank interface 210 of the carbon canister 200 is connected with a filling exhaust valve 420 through a filling exhaust channel 410, and the filling exhaust valve 420 is communicated with the inside of the fuel tank 400 to form a desorption passage; the throttling means 300 is disposed on the filling exhaust passage 410 and communicates with the desorption pipe 100 through the desorption pipe branch 110 for throttling the gas from the inside of the fuel tank 400 at the time of desorption.

The throttle device 300 includes: flexible diaphragm 310, housing 320, septum 330, first port 340, second port 350, third port 360,

the edge of the flexible diaphragm 310 is fixed inside the housing 320 and divides the inside of the housing 320 into a first chamber 321 and a second chamber 322 which are not communicated; a diaphragm 330 disposed within second chamber 322, coupled to flexible diaphragm 310, and slidable within second chamber 322 with movement of flexible diaphragm 310; the first port 340 and the second port 350 communicate with the second chamber 322, the first port 340 and the second port 350 are disposed at positions having a difference in position in the moving direction of the partition 330, and the third port 360 communicates with the first chamber 321 and is connected to the desorption pipe branch 110.

As shown in fig. 3, when the engine 500 starts to desorb, the flexible diaphragm 310 is sucked and swollen by the negative pressure, and the diaphragm 330 is moved by the flexible diaphragm 310 to slide between the first port 340 and the second port 350, so that the gas flow through the first port 340 and the second port 350 is blocked, and the gas from the inside of the fuel tank 400 is throttled.

The throttle device 300 may be integrated with features on the fill vent passage 410, such as on the canister 200, on the fill vent valve 420, reducing the number of communicating ports and features.

When the throttling device 300 is horizontally arranged, as shown in fig. 2, in a non-working state, the flexible diaphragm 310 is drawn by the gravity of the partition plate 330 to be concave downwards, so that the partition plate 330 is positioned below the first interface 340 and the second interface 350, and the first interface 340 and the second interface 350 are completely unblocked, so that smooth exhaust during fuel filling is realized.

The diaphragm 330 is coupled to the center of the flexible diaphragm 310 to achieve maximum sliding displacement, and a guide structure is provided in the second chamber 322 to limit the displacement direction of the diaphragm 330.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A desorption system for an ORVR vehicle type is characterized by comprising a desorption pipe (100), a carbon canister (200), a throttling device (300) and a fuel tank (400), wherein the desorption pipe (100) is connected between an engine (500) and the carbon canister (200), the carbon canister (200) is communicated with the outside air through a through atmospheric air port (220) arranged on the carbon canister (200), the carbon canister (200) is also connected with a filling exhaust valve (420) through a through fuel tank interface (210) arranged on the carbon canister (200) through a filling exhaust channel (410), the filling exhaust valve (420) is communicated with the inside of the fuel tank (400) to form a desorption passage, the throttling device (300) is connected between the filling tank interface (210) and the filling exhaust channel (410), is communicated with the desorption pipe (100) through a desorption branch (110) and is used for desorption, throttling gas from inside the fuel tank; the throttling device (300) comprises a shell (320), a first interface (340), a second interface (350) and a third interface (360) are arranged on the shell (320), and the throttling device (300) is respectively and correspondingly connected with the fuel tank passing interface (210), the filling and exhausting channel (410) and the desorption branch (110) through the first interface (340), the second interface (350) and the third interface (360); a flexible diaphragm (310) is arranged in the shell (320), and the inner space of the shell (320) is divided into a first chamber (321) and a second chamber (322); a partition plate (330) is arranged in the second chamber (322), the partition plate (330) is connected with the flexible diaphragm (310) and can slide in the second chamber (322) along with the movement of the flexible diaphragm (310); the first port (340) and the second port (350) are communicated with the second chamber (322) and have a position difference with each other in the moving direction of the partition plate (330); when the engine does not work, the partition plate (330) is positioned below the first port (340) and the second port (350), and when the engine is desorbed, the partition plate (330) slides upwards to separate the first port (340) from the second port (350).

2. The desorption system according to claim 1, wherein the second chamber (322) is further provided with a guide structure for limiting the displacement direction of the partition (330).

3. The desorption system according to claim 1, wherein the third port (360) is in communication with the first chamber (321).

4. The desorption system according to claim 1, wherein the throttling device (300) is integrated with the filling exhaust valve (420) for reducing the number of connected ports and parts.

5. The desorption system according to claim 1, wherein the throttle device (300) is capable of being integrated with the canister (200) for reducing the number of connected ports and parts.

6. Vehicle characterized in that it comprises a desorption system for ORVR models as claimed in any of the claims from 1 to 5.