CN212406911U

CN212406911U - Vehicle fuel evaporation leakage diagnostic device

Info

Publication number: CN212406911U
Application number: CN202022026168.3U
Authority: CN
Inventors: 王小平; 曹万
Original assignee: Wuhan Finemems Inc
Current assignee: Wuhan Finemems Inc
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-01-26
Anticipated expiration: 2030-09-16

Abstract

The utility model belongs to the technical field of the automobile inspection technique and specifically relates to a vehicle fuel evaporation leakage diagnostic device, including the gasoline tank, the exit end of gasoline tank installs gasoline vapor recovery tube, installs first shut valve on the gasoline vapor recovery tube, and gasoline vapor recovery tube is connected with the carbon-containing tank, and the entrance point of carbon-containing tank installs methyl alcohol vapor recovery tube, and methyl alcohol vapor recovery tube is last to be fixedly installed with the second shut valve, and the second shut valve is connected with the methanol tank, and the carbon-containing tank is connected with the air inlet pipe, and the air inlet pipe installs the ventilation valve; the gasoline tank is provided with a gasoline rail assembly, the gasoline rail assembly is connected with a gas inlet pipe assembly, the methanol tank is provided with a methanol rail assembly, and the gas inlet pipe assembly comprises a gas inlet manifold, a gas inlet main pipe and a throttle valve. When air is extracted through the leakage diagnosis process, one of the first locking valve and the second locking valve is kept closed, so that the gasoline fuel and the methanol fuel in the fuel evaporation leakage diagnosis system are respectively extracted, and the accuracy of leakage diagnosis is ensured.

Description

Vehicle fuel evaporation leakage diagnostic device

Technical Field

The utility model relates to an automobile inspection technical field especially relates to a vehicle fuel evaporation leaks diagnostic device.

Background

The fuel system has the functions of supplying a certain amount of clean gasoline with good atomization to the engine according to the requirement of the running working condition of the engine so as to be mixed with a certain amount of air to form combustible mixed gas, and meanwhile, the fuel system also needs to store a certain amount of fuel to ensure that the automobile has a long driving range, and the fuel used by the automobile at present mainly comprises gasoline and diesel oil. With the annual increase of the automobile keeping quantity, the problem of environmental pollution caused by automobile emission and leakage is not ignored; although methanol has many advantages as vehicle alternative fuel, the ignition point is higher, the low-temperature start is more difficult, and the methanol filling station is not popularized; automobile manufacturers generally adopt a technical route of gasoline and methanol dual fuel to solve the problems, gasoline is switched to methanol fuel after being started at a low temperature, and meanwhile, the performance of an engine is improved by using a turbocharging technology. Along with the tightening of emission regulations, relevant regulations stipulate that vehicles have a diagnosis and detection function on the leakage of a fuel evaporation system, the leakage of the fuel evaporation system of the vehicle is prevented, and the pollution of fuel vapor to air is controlled; in the prior art, the leakage diagnosis of the fuel evaporation system is only limited to a single-fuel automobile, and the leakage diagnosis cannot be applied to the automobile powered by a turbocharged engine, so that the leakage diagnosis is large in limitation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defect of large leakage diagnosis limitation in the prior art, and providing a vehicle fuel evaporation leakage diagnosis device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a vehicle fuel evaporation leakage diagnosis device is designed, and comprises a gasoline tank, wherein a gasoline vapor recovery pipe is fixedly installed at the outlet end of the gasoline tank, a first locking valve is fixedly installed on the gasoline vapor recovery pipe, the outlet end of the gasoline vapor recovery pipe is connected with a carbon tank, a methanol vapor recovery pipe is fixedly installed at the inlet end of the carbon tank, a second locking valve is fixedly installed on the methanol vapor recovery pipe, the inlet end of the second locking valve is connected with the methanol tank through the methanol vapor recovery pipe, the outlet end of the carbon tank is fixedly connected with an air inlet pipe, and the inlet end of the air inlet pipe is fixedly installed with a ventilation valve;

the fuel evaporation and leakage diagnosis device is characterized in that a gasoline rail assembly is installed at the inlet end of the gasoline tank, an air inlet pipe assembly is fixedly connected to the outlet end of the gasoline rail assembly, a methanol rail assembly is fixedly installed at the outlet end of the methanol tank, the outlet end of the methanol rail assembly is communicated with the air inlet pipe assembly, the air inlet pipe assembly comprises an air inlet manifold, an air inlet main pipe and a throttle valve, the air inlet manifold is fixedly connected with the air inlet main pipe, the outlet end of the air inlet main pipe is communicated with the throttle valve, the air inlet manifold is respectively communicated with the gasoline rail assembly and the methanol rail assembly, and when the fuel evaporation and leakage diagnosis process is used for air suction, one of the first locking valve and the second locking valve.

Preferably, the outlet end of the throttle valve is fixedly connected with an air intercooler through a guide pipe, the outlet end of the air intercooler is fixedly connected with a turbocharger through a guide pipe, the outlet end of the turbocharger is fixedly provided with a booster pipe, and the outlet end of the booster pipe is fixedly provided with an air filter assembly.

Preferably, a first branch pipe is fixedly installed on the throttle valve, an outlet end of the first branch pipe is communicated with the pressure increasing pipe, and a venturi valve is fixedly installed on the first branch pipe.

Preferably, a steam desorption pipe is fixedly installed at the inlet end of the venturi valve, the inlet end of the steam desorption pipe is communicated with the carbon canister, a gas circulation valve is fixedly installed at the outlet end of the steam desorption pipe, and a carbon canister cleaning valve is fixedly installed at the inlet end of the steam desorption pipe.

Preferably, the petrol pump has been placed to the inside of petrol tank, the below of petrol pump is provided with first filter screen, first filter screen fixed mounting is in the petrol tank, fixed mounting has petrol level sensor on the inner wall of petrol tank.

Preferably, inside heating chamber and the apotheca of being provided with of methyl alcohol oil tank, set up the air guide mouth that link up between heating chamber and the apotheca, the inside top fixed mounting of heating chamber has the second filter screen, the top fixed mounting of heating chamber inner wall has methyl alcohol level sensor, the bottom fixed mounting of heating chamber inner wall has methyl alcohol temperature sensor, the bottom fixed mounting of heating chamber inner side has the heater strip, the inside fixed mounting of apotheca has a plurality of condensation boards, condensation board evenly distributed is in the apotheca, the inside fixed mounting of apotheca has corresponding methyl alcohol pump.

Preferably, the equal fixed mounting in exit end of gasoline tank and methyl alcohol oil tank has oil filter, oil filter includes the casing, the inside bottom fixed mounting of casing has the layer of washing the gas, the top fixed mounting on the layer of washing the gas has the layer that absorbs water.

The utility model provides a pair of vehicle fuel evaporation leaks diagnostic device, beneficial effect lies in:

1. when air is extracted in the fuel evaporation leakage diagnosis process, one of the first locking valve and the second locking valve is kept closed, so that the gasoline fuel and the methanol fuel in the fuel evaporation leakage diagnosis system are respectively extracted, and the accuracy of leakage diagnosis is ensured;

2. the pipeline in the venturi valve is only conducted when a turbocharger of the turbocharged engine runs, so that the first branch pipe and the second branch pipe can respectively and independently exhaust the fuel evaporation leakage diagnosis system, and the air exhaust quality is ensured.

Drawings

Fig. 1 is a first schematic structural diagram of a vehicle fuel evaporation leakage diagnosis device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a vehicle fuel evaporation leakage diagnosis device according to an embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of a gasoline tank of a vehicle fuel evaporation leakage diagnosis device according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an internal structure of a methanol fuel tank of a vehicle fuel evaporation leakage diagnosis device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an oil filter of a vehicle fuel evaporation leakage diagnosis device according to an embodiment of the present invention.

In the figure: gasoline tank 1, gasoline pump 111, first filter screen 112, gasoline liquid level sensor 113, gasoline vapor recovery pipe 2, first locking valve 3, carbon tank 4, methanol vapor recovery pipe 5, second locking valve 6, methanol gasoline tank 7, heating chamber 71, storage chamber 72, methanol liquid level sensor 73, second filter screen 74, methanol temperature sensor 75, heater wire 76, air guide port 77, condensation plate 78, methanol pump 79, oil filter 8, casing 81, water absorption layer 82, scrubbing layer 83, gasoline rail assembly 9, air inlet pipe assembly 10, air inlet manifold 101, air inlet manifold 102, throttle valve 103, methanol oil rail assembly 11, air intercooler 12, turbocharger 13, booster pipe 14, air cleaner assembly 15, first branch pipe 16, venturi valve 17, steam desorption pipe 18, gas circulation valve 19, second branch pipe 20, carbon tank purge valve 21, air inlet pipe 22, air circulation valve 19, carbon tank purge valve 21, and air circulation pipe, A vent valve 23.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, a vehicle fuel evaporation leakage diagnosis device comprises a gasoline tank 1, a gasoline vapor recovery pipe 2 is fixedly installed at an outlet end of the gasoline tank 1, a first locking valve 3 is fixedly installed on the gasoline vapor recovery pipe 2, an outlet end of the gasoline vapor recovery pipe 2 is connected with a carbon tank 4, an inlet end of the carbon tank 4 is fixedly installed with a methanol vapor recovery pipe 5, a second locking valve 6 is fixedly installed on the methanol vapor recovery pipe 5, an inlet end of the second locking valve 6 is connected with a methanol oil tank 7 through the methanol vapor recovery pipe 5, an outlet end of the carbon tank 4 is fixedly connected with an air inlet pipe 22, and an inlet end of the air inlet pipe 22 is fixedly installed with a ventilation valve 23; when air is extracted in the fuel evaporation leakage diagnosis process, one of the first locking valve 3 and the second locking valve 6 is kept closed, so that the gasoline fuel and the methanol fuel in the fuel evaporation leakage diagnosis system are respectively extracted, and the accuracy of leakage diagnosis is ensured.

The inlet end of the gasoline tank 1 is provided with a gasoline rail assembly 9, the outlet end of the gasoline rail assembly 9 is fixedly connected with an air inlet pipe assembly 10, the outlet end of the methanol tank 7 is fixedly provided with a methanol rail assembly 11, the outlet end of the methanol rail assembly 11 is communicated with the air inlet pipe assembly 10, the air inlet pipe assembly 10 comprises an air inlet manifold 101, an air inlet header pipe 102 and a throttle valve 103, the air inlet manifold 101 is fixedly connected with the air inlet header pipe 102, the outlet end of the air inlet header pipe 102 is communicated with the throttle valve 103, the air inlet manifold 101 is respectively communicated with the gasoline rail assembly 9, the methanol oil rail assembly 11 is communicated, the outlet end of the throttle valve 103 is fixedly connected with an air intercooler 12 through a guide pipe, the outlet end of the air intercooler 12 is fixedly connected with a turbocharger 13 through a guide pipe, the outlet end of the turbocharger 13 is fixedly provided with a booster pipe 14, and the outlet end of the booster pipe 14 is fixedly provided with an air filter assembly 15.

The throttle valve 103 is fixedly provided with a first branch pipe 16, the outlet end of the first branch pipe 16 is communicated with the pressure increasing pipe 14, the first branch pipe 16 is fixedly provided with a Venturi valve 17, the inlet end of the Venturi valve 17 is fixedly provided with a steam desorption pipe 18, the inlet end of the steam desorption pipe 18 is communicated with the carbon tank 4, the outlet end of the steam desorption pipe 18 is fixedly provided with a gas circulation valve 19, the inlet end of the gas circulation valve 19 is fixedly provided with a second branch pipe 20, the inlet end of the second branch pipe 20 is communicated with the throttle valve 103, and the inlet end of the steam desorption pipe 18 is fixedly provided with a carbon tank cleaning valve 2.

The working principle is as follows: when the turbocharger 13 of the turbocharged engine is not operated, the pressure in the intake manifold 101 of the turbocharger 13 is lower than the atmospheric pressure, and the gasoline fuel leakage diagnosis module/methanol fuel leakage diagnosis module is pumped through the second branch pipe 20 (the gasoline tank 1, the gasoline vapor recovery pipe 2, the carbon tank 4 and the steam desorption pipe 18 constitute the gasoline fuel leakage diagnosis module, and the methanol tank 7, the methanol vapor recovery pipe 5, the carbon tank 4 and the steam desorption pipe 18 constitute the methanol fuel leakage diagnosis module); when the turbocharger 13 of the turbocharged engine is operating, the venturi valve 17 is turned on, and the first branch line 16 performs air extraction on the gasoline fuel leakage diagnosis module/the methanol fuel leakage diagnosis module. The first branch pipe 16 and the second branch pipe 20 can respectively and independently exhaust the fuel evaporation leakage diagnosis system, so that the air exhaust quality is ensured.

Closing the ventilation valve 23, opening the carbon tank cleaning valve 21, when the first locking valve 3 is opened and the second locking valve 6 is closed, taking gasoline as engine working fuel, and extracting the gasoline from a gasoline fuel leakage diagnosis module consisting of the gasoline tank 1, the gasoline steam recovery pipe 2, the carbon tank 4 and the steam desorption pipe 18; when the first locking valve 3 is closed and the second locking valve 6 is opened, the working fuel of the engine is methanol, and the methanol fuel oil leakage diagnosis module consisting of the methanol oil tank 7, the methanol steam recovery pipe 5, the carbon tank 4 and the steam desorption pipe 18 is pumped. The device can realize the respective air extraction of the methanol and the gasoline, and ensure the accuracy of leakage diagnosis.

Preferably, as shown in fig. 3-4, a gasoline pump 111 is disposed inside the gasoline tank 1, a first filter screen 112 is disposed below the gasoline pump 111, the first filter screen 112 is fixedly mounted in the gasoline tank 1, and a gasoline level sensor 113 is fixedly mounted on an inner wall of the gasoline tank 1; the heating chamber 71 and the storage chamber 72 are arranged in the methanol oil tank 7, a through air guide port 77 is formed between the heating chamber 71 and the storage chamber 72, a second filter screen 74 is fixedly arranged at the top end of the inside of the heating chamber 71, a methanol liquid level sensor 73 is fixedly arranged at the top end of the inner wall of the heating chamber 71, a methanol temperature sensor 75 is fixedly arranged at the bottom end of the inner wall of the heating chamber 71, a heating wire 76 is fixedly arranged at the bottom of the inner side of the heating chamber 71, a plurality of condensing plates 78 are fixedly arranged in the storage chamber 72, the condensing plates 78 are uniformly distributed in the storage chamber 72, and a corresponding methanol pump 79 is.

The gasoline or methanol cleaning is filtered through the first filter screen 112 and the second filter screen 72, so that the cleanliness of the gasoline or methanol cleaning is guaranteed; in addition, the methanol mixed liquid can be heated by heating the heating wire 76, because the boiling point of methanol is lower than that of water, the heating temperature is known in real time through the methanol temperature sensor 75 in the heating process, the methanol is ensured to be completely evaporated and the water is not evaporated, then the methanol gas is guided into the storage chamber 72 through the gas guide port 77, the high-temperature methanol gas is in a liquid state again after contacting with the condensing plate 78, and finally the methanol gas is guided out through the methanol pump 79; the whole process can effectively separate the water in the methanol mixed liquid, greatly improves the purity of the methanol and ensures the use safety.

Preferably, the outlet ends of the gasoline tank 1 and the methanol tank 7 are both fixedly provided with an oil filter 8, as shown in fig. 5, the oil filter 8 comprises a housing 81, the bottom end inside the housing 81 is fixedly provided with a gas washing layer 83, and the top of the gas washing layer 83 is fixedly provided with a water absorbing layer 82. The oil filter 8 can filter gasoline or methanol to absorb mixed moisture and gas in the gasoline or methanol, thereby ensuring the cleanliness of the gasoline or methanol.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A vehicle fuel evaporation leakage diagnosis device comprises a gasoline tank (1), wherein a gasoline vapor recovery pipe (2) is fixedly installed at the outlet end of the gasoline tank (1), and is characterized in that a first locking valve (3) is fixedly installed on the gasoline vapor recovery pipe (2), a carbon tank (4) is connected to the outlet end of the gasoline vapor recovery pipe (2), a methanol vapor recovery pipe (5) is fixedly installed at the inlet end of the carbon tank (4), a second locking valve (6) is fixedly installed on the methanol vapor recovery pipe (5), a methanol oil tank (7) is connected to the inlet end of the second locking valve (6) through the methanol vapor recovery pipe (5), an air inlet pipe (22) is fixedly connected to the outlet end of the carbon tank (4), and a ventilation valve (23) is fixedly installed at the inlet end of the air inlet pipe (22);

a gasoline rail assembly (9) is arranged at the inlet end of the gasoline tank (1), an air inlet pipe assembly (10) is fixedly connected at the outlet end of the gasoline rail assembly (9), a methanol oil rail assembly (11) is fixedly arranged at the outlet end of the methanol oil tank (7), the outlet end of the methanol oil rail assembly (11) is communicated with an air inlet pipe assembly (10), the air inlet pipe assembly (10) comprises an air inlet manifold (101), an air inlet manifold (102) and a throttle valve (103), the intake manifold (101) is fixedly connected with an intake manifold (102), the outlet end of the intake manifold (102) is communicated with a throttle valve (103), the air inlet manifold (101) is respectively communicated with a gasoline rail assembly (9) and a methanol rail assembly (11), wherein, when the fuel evaporation leakage diagnosis process is used for air extraction, one of the first locking valve (3) and the second locking valve (6) is kept closed.

2. The vehicle fuel evaporation leakage diagnosis device according to claim 1, wherein an outlet end of the throttle valve (103) is fixedly connected with an air intercooler (12) through a conduit, an outlet end of the air intercooler (12) is fixedly connected with a turbocharger (13) through a conduit, an outlet end of the turbocharger (13) is fixedly provided with a booster pipe (14), and an outlet end of the booster pipe (14) is fixedly provided with an air filter assembly (15).

3. A vehicle fuel evaporation leakage diagnosis apparatus as set forth in claim 2, wherein said throttle valve (103) is fixedly provided with a first branch pipe (16), an outlet end of said first branch pipe (16) is communicated with said booster duct (14), and said first branch pipe (16) is fixedly provided with a venturi valve (17).

4. A vehicle fuel evaporation leakage diagnostic apparatus according to claim 3, wherein said venturi valve (17) is fixedly provided with a vapor desorption pipe (18) at its inlet end, said vapor desorption pipe (18) is connected to the canister (4) at its inlet end, said vapor desorption pipe (18) is fixedly provided with a gas circulation valve (19) at its outlet end, and said vapor desorption pipe (18) is fixedly provided with a canister purge valve (21) at its inlet end.

5. The vehicle fuel evaporation leakage diagnosis device according to claim 1, wherein a gasoline pump (111) is placed inside the gasoline tank (1), a first filter screen (112) is arranged below the gasoline pump (111), the first filter screen (112) is fixedly installed in the gasoline tank (1), and a gasoline level sensor (113) is fixedly installed on the inner wall of the gasoline tank (1).

6. The vehicular fuel evaporation leakage diagnosis device according to claim 1, a heating chamber (71) and a storage chamber (72) are arranged in the methanol oil tank (7), a through air guide port (77) is arranged between the heating chamber (71) and the storage chamber (72), a second filter screen (74) is fixedly arranged at the top end inside the heating chamber (71), a methanol liquid level sensor (73) is fixedly arranged at the top end of the inner wall of the heating chamber (71), a methanol temperature sensor (75) is fixedly arranged at the bottom end of the inner wall of the heating chamber (71), a heating wire (76) is fixedly arranged at the bottom of the inner side of the heating chamber (71), a plurality of condensation plates (78) are fixedly arranged in the storage chamber (72), the condensing plates (78) are uniformly distributed in the storage chamber (72), and corresponding methanol pumps (79) are fixedly installed in the storage chamber (72).

7. The vehicle fuel evaporation leakage diagnosis device according to claim 1, wherein the outlet ends of the gasoline tank (1) and the methanol tank (7) are fixedly provided with oil filters (8), each oil filter (8) comprises a housing (81), the bottom end inside the housing (81) is fixedly provided with a gas washing layer (83), and the top of the gas washing layer (83) is fixedly provided with a water absorption layer (82).