A carbon can solenoid valve diagnosis device and diagnosis method

Abstract

The application discloses a kind of carbon tank electromagnetic valve diagnostic device and diagnostic method including diagnostic mechanism, the diagnostic mechanism is installed on carbon tank electromagnetic valve, and carbon tank electromagnetic valve is simultaneously provided with power-off mechanism and binding mechanism, carbon tank electromagnetic valve includes electromagnetic valve body, P port, A port, T port and power supply interface;Diagnostic mechanism includes first adapter pipe, and first adapter pipe is sleeved on P port, and the middle section of first adapter pipe is provided with loop air pipe, and flow monitor is arranged on loop air pipe;Diagnostic mechanism simultaneously includes second adapter pipe, and second adapter pipe is sleeved on T port, and one end of second adapter pipe is clamped with air pipe, and one end of air pipe is connected with the output end of pressure monitor, the carbon tank electromagnetic valve diagnostic device and diagnostic method disclosed in the application have the effect of automatic monitoring of carbon tank electromagnetic valve in undismantled state, avoid more energy waste caused by not knowing problem.

Description

Technical Field

[0001] This invention relates to the field of carbon canister solenoid valve diagnostic technology, and in particular to a carbon canister solenoid valve diagnostic device and diagnostic method. Background Technology

[0002] A carbon canister solenoid valve is a device installed in a car or motorcycle to reduce air pollution caused by fuel evaporation emissions while increasing fuel efficiency.

[0003] The function of the automotive carbon canister solenoid valve is to control the ventilation and venting of the automotive carbon canister system to prevent the emission of harmful gases during vehicle operation. When the engine is running, the automotive carbon canister solenoid valve closes to prevent fuel vapor from entering the engine; when the engine stops running, the automotive carbon canister solenoid valve opens to release fuel vapor from the carbon canister into the atmosphere, thus maintaining the normal operating condition of the automotive carbon canister system.

[0004] If the carbon canister solenoid valve malfunctions, it can lead to increased fuel consumption, fluctuating engine idle speed, and weak acceleration. Generally, a visit to a repair shop for disassembly and diagnosis is necessary to determine the problem. Increased fuel consumption may not be immediately noticeable, as current diagnostic devices can only detect the problem after the carbon canister solenoid valve has been disassembled; they cannot perform self-diagnosis, thus failing to identify the problem in time and resulting in wasted energy. Summary of the Invention

[0005] This invention discloses a diagnostic device and method for a carbon canister solenoid valve, aiming to solve the technical problem that existing diagnostic devices can only diagnose problems after the carbon canister solenoid valve is disassembled, and cannot perform self-detection, thus failing to detect problems in a timely manner and resulting in energy waste.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A diagnostic device for a carbon canister solenoid valve includes a diagnostic mechanism installed on the carbon canister solenoid valve. The carbon canister solenoid valve is also equipped with a power-off mechanism and a binding mechanism. The carbon canister solenoid valve includes a solenoid valve body, a P port, an A port, a T port, and a power supply interface.

[0008] The diagnostic unit includes a first adapter pipe, which is fitted onto port P. A loop vent pipe is installed in the middle section of the first adapter pipe, and a flow monitor is installed on the loop vent pipe.

[0009] The diagnostic apparatus also includes a second adapter pipe, which is fitted onto the T-port. One end of the second adapter pipe is fitted with a vent pipe, and one end of the vent pipe is connected to the output end of a pressure monitor. The input end of the pressure monitor is tightly connected to a funnel-shaped vent pipe, and a guide fan is installed inside the funnel-shaped vent pipe. One end of the funnel-shaped vent pipe is tightly connected to a vent bend.

[0010] By incorporating a diagnostic mechanism, the pressure at port T can be monitored in real time by observing the values ​​of the pressure monitor, thereby monitoring whether the sealing status of the carbon canister solenoid valve is normal. By observing the flow monitor to observe whether the air is flowing in the loop vent pipe, it can be determined whether ports A and P are flowing normally. Thus, automatic monitoring of the carbon canister solenoid valve can be achieved without disassembly, avoiding the loss of more energy due to unawareness of problems.

[0011] In a preferred embodiment, the power-off mechanism includes an adapter socket that is snapped onto the power supply interface. One end of the adapter socket is fixedly connected to a ribbon cable. The adapter socket is connected to an adapter via the ribbon cable, and the adapter is of the same specification as the power supply interface. A relay is provided in the middle section of the ribbon cable.

[0012] A diagnostic method for a carbon canister solenoid valve diagnostic device includes the following specific steps:

[0013] S1: Set threshold: Based on the specifications of the carbon canister solenoid valve used, simulate and calculate and set the numerical analysis thresholds A and B of the device, where threshold A is the pressure threshold when air is pumped out of the vent pipe, threshold B is the pressure threshold when air is supplied to the vent pipe, and the value of threshold A is less than the value of threshold B.

[0014] S2: Real-time pressure monitoring at port T: During the use of the carbon canister solenoid valve, air is supplied from port T to port P, and negative pressure suction is simultaneously provided in the vent pipe. The reading of the pressure monitor is normal if it is within the threshold A.

[0015] S3: Start Power Off State: Start the relay to disconnect the power supply to the carbon canister solenoid valve and switch to the power off state;

[0016] S4: T-port secondary pressure monitoring: Start the guide fan to ventilate the vent pipe. If the monitored pressure value is within the threshold B, it indicates that the gas is not flowing when the carbon canister solenoid valve is closed.

[0017] S5: A and P port flow status monitoring: In the closed state, the flow rate monitor is used to observe whether the air is flowing in the loop vent pipe to determine whether the A and P ports are flowing normally.

[0018] By incorporating a power-off mechanism, during driving, a one-button monitoring system on the vehicle's center console can be used to temporarily disconnect the power supply to the carbon canister solenoid valve via a relay. This enables diagnosis of the carbon canister solenoid valve while driving, providing a beneficial real-time diagnostic experience.

[0019] In a preferred embodiment, the binding mechanism includes a support plate connected to a pressure monitor. An elastic snap-fit ​​ring is fixedly connected to one outer wall of the support plate and is movably snapped onto the outside of the solenoid valve body. A first long snap-fit ​​groove and a second long snap-fit ​​groove are fixedly connected to opposite outer walls of the elastic snap-fit ​​ring, respectively. A short snap-fit ​​groove is fixedly connected to one outer wall of the second long snap-fit ​​groove. A first long snap-fit ​​bar is movably snapped into the first long snap-fit ​​groove, and a second long snap-fit ​​bar is movably snapped into the second long snap-fit ​​groove. A first elastic net is simultaneously connected to one outer wall of both the first and second long snap-fit ​​bars. The first elastic net surrounds the carbon canister solenoid valve and the diagnostic mechanism, and simultaneously contacts the input end of the vent bend. A short snap-fit ​​bar is movably snapped into the short snap-fit ​​groove, and a second elastic net is simultaneously connected to one outer wall of both the short snap-fit ​​bar and the first long snap-fit ​​bar.

[0020] By incorporating a binding mechanism, the diagnostic device, which involves multiple components, suffers from drawbacks such as large footprint and messy wiring after installation. The binding mechanism not only overcomes these shortcomings but also, in conjunction with the ventilation bend, effectively reduces the dust flow rate.

[0021] As described above, a carbon canister solenoid valve diagnostic device includes a diagnostic mechanism installed on the carbon canister solenoid valve. The carbon canister solenoid valve is equipped with both a power-off mechanism and a binding mechanism. The carbon canister solenoid valve includes a solenoid valve body, a P port, an A port, a T port, and a power supply interface. The diagnostic mechanism includes a first adapter pipe fitted onto the P port. A loop vent pipe is installed in the middle section of the first adapter pipe, and a flow monitor is installed on the loop vent pipe. The diagnostic mechanism also includes a second adapter pipe fitted onto the T port. One end of the second adapter pipe is snapped with a vent pipe, and one end of the vent pipe is connected to the output end of a pressure monitor. The input end of the pressure monitor is tightly connected to a funnel-shaped vent pipe, and a guide fan is installed inside the funnel-shaped vent pipe. One end of the funnel-shaped vent pipe is tightly connected to a vent bend. The carbon canister solenoid valve diagnostic device and method provided by this invention have the technical effect of enabling automatic monitoring of the carbon canister solenoid valve in a non-disassembled state, avoiding unnoticed problems that lead to further energy waste. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a carbon canister solenoid valve diagnostic device proposed in this invention.

[0023] Figure 2 This is a schematic diagram of the disassembly mechanism of a carbon canister solenoid valve diagnostic device proposed in this invention.

[0024] Figure 3 This is a schematic diagram of the internal structure of the funnel-shaped vent pipe of a carbon canister solenoid valve diagnostic device proposed in this invention.

[0025] Figure 4 This is a schematic diagram of the disassembled structure of the binding mechanism of a carbon canister solenoid valve diagnostic device proposed in this invention.

[0026] Figure 5 This is a flowchart illustrating the diagnostic method of a carbon canister solenoid valve diagnostic device proposed in this invention.

[0027] In the diagram: 1. Carbon canister solenoid valve; 2. Diagnostic mechanism; 3. Power-off mechanism; 4. Binding mechanism; 101. Solenoid valve body; 102. P port; 103. A port; 104. Power supply interface; 105. T port; 201. First adapter pipe; 202. Loop vent pipe; 203. Flow monitor; 204. Second adapter pipe; 205. Vent pipe; 206. Pressure monitor; 207. Funnel-shaped vent pipe; 2 08. Ventilation bend; 209. Guide fan; 301. Adapter socket; 302. Ribbon cable; 303. Relay; 304. Adapter; 401. Support plate; 402. Elastic snap ring; 403. First long snap slot; 404. Second long snap slot; 405. Short snap slot; 406. First long snap bar; 407. First elastic net; 408. Second elastic net; 409. Short snap bar; 410. Second long snap bar. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] The diagnostic device and method for carbon canister solenoid valves disclosed in this invention are mainly applied to the diagnostic scenarios of carbon canister solenoid valves.

[0030] Reference Figures 1-3 A diagnostic device for a carbon canister solenoid valve includes a diagnostic mechanism 2, which is installed on a carbon canister solenoid valve 1. The carbon canister solenoid valve 1 is also provided with a power-off mechanism 3 and a binding mechanism 4. The carbon canister solenoid valve 1 includes a solenoid valve body 101, a P port 102, an A port 103, a T port 105 and a power supply interface 104.

[0031] The diagnostic unit 2 includes a first adapter pipe 201, which is sleeved on the P port 102. A loop vent pipe 202 is provided in the middle section of the first adapter pipe 201, and a flow monitor 203 is provided on the loop vent pipe 202.

[0032] The diagnostic unit 2 also includes a second adapter pipe 204, which is fitted onto the T-port 105. One end of the second adapter pipe 204 is snapped with a vent pipe 205, and one end of the vent pipe 205 is connected to the output end of a pressure monitor 206. The input end of the pressure monitor 206 is tightly connected to a funnel-shaped vent pipe 207, and a guide fan 209 is installed inside the funnel-shaped vent pipe 207. One end of the funnel-shaped vent pipe 207 is tightly connected to a vent bend 208. The entire diagnostic unit 2 is mounted on the carbon canister electromagnetic... The valve 1 is installed on the outside of the carbon canister solenoid valve 1 in a fixed position. The pressure at port T can be monitored in real time by observing the value of the pressure monitor 206, thereby monitoring whether the sealing state of the carbon canister solenoid valve 1 is normal. The air circulation in the return vent pipe 202 can be observed by observing the flow monitor 203, thereby determining whether port A 103 and port P 102 are circulating normally. Thus, automatic monitoring of the carbon canister solenoid valve 1 can be achieved without disassembly, avoiding the loss of more energy due to unawareness of problems.

[0033] Reference Figure 2 In a preferred embodiment, the power-off mechanism 3 includes an adapter socket 301, which is snapped onto the power supply interface 104, and one end of the adapter socket 301 is fixedly connected to a ribbon cable 302.

[0034] Reference Figure 2 In a preferred embodiment, the adapter socket 301 is connected to an adapter 304 via a ribbon cable 302, and the adapter 304 is of the same specification as the power supply interface 104. A relay 303 is provided in the middle section of the ribbon cable 302. During driving, by setting the power-off mechanism 3, the power supply from the vehicle to the carbon canister solenoid valve 1 can be temporarily disconnected by setting a one-button monitoring button on the car's center console. This allows the carbon canister solenoid valve 1 to be diagnosed by the diagnostic mechanism 2 in a power-off state. After the diagnosis is completed, the power supply is restored by the relay 303. Thus, the diagnosis of the carbon canister solenoid valve 1 can be realized during driving, achieving the beneficial effect of real-time on-site diagnosis.

[0035] Reference Figure 4 In a preferred embodiment, the binding mechanism 4 includes a support plate 401, which is connected to the pressure monitor 206. An elastic snap ring 402 is fixedly connected to one outer wall of the support plate 401, and the elastic snap ring 402 is movably snapped onto the outside of the solenoid valve body 101.

[0036] Reference Figure 4 In a preferred embodiment, the outer walls of the two opposite sides of the elastic snap ring 402 are respectively fixedly connected with a first long snap groove 403 and a second long snap groove 404, and a short snap groove 405 is fixedly connected to one side of the outer wall of the second long snap groove 404.

[0037] Reference Figure 4 In a preferred embodiment, a first long card strip 406 is movably engaged in the first long card slot 403, and a second long card strip 410 is movably engaged in the second long card slot 404. A first elastic net 407 is connected to one outer wall of both the first long card strip 406 and the second long card strip 410.

[0038] Reference Figure 4 In a preferred embodiment, a first elastic mesh 407 surrounds the exterior of the carbon canister solenoid valve 1 and the diagnostic mechanism 2, and the first elastic mesh 407 simultaneously contacts the input end of the vent bend 208. A short clip 409 is movably engaged in the short clip slot 405, and a second elastic mesh 408 is simultaneously connected to one side of the outer wall of the short clip 409 and the first long clip 406. Since the diagnostic mechanism 2 involves multiple components, the installed device has the disadvantages of large footprint and messy wiring. The binding mechanism 4 addresses these issues. When the first long clip 406, the second long clip 410, and the short clip 409 are engaged in the fixed position, the first elastic net 407 tightly wraps most of the components, including wrapping around the input end of the ventilation bend 208. The second elastic net 408 wraps around the outside of the power-off mechanism 3, organizing the wiring of the power-off mechanism 3. Thus, under the action of the binding mechanism 4, the disadvantages of large footprint and messy wiring are compensated, and in combination with the ventilation bend 208, the dust flow rate is effectively reduced.

[0039] Reference Figure 5 A diagnostic method for a carbon canister solenoid valve diagnostic device includes the following specific steps:

[0040] S1: Set threshold: Based on the specifications of the carbon canister solenoid valve 1 used, simulate and calculate and set the numerical analysis thresholds A and B of the device, where threshold A is the pressure threshold when air is drawn from the vent pipe 205, threshold B is the pressure threshold when air is supplied to the vent pipe 205, and the value of threshold A is less than the value of threshold B.

[0041] S2: Real-time pressure monitoring at port T: During the use of carbon canister solenoid valve 1, air is supplied from port T 105 to port P 102, and negative pressure suction is simultaneously provided to the vent pipe 205. The value of the pressure monitor 206 is normal if it is within the threshold A.

[0042] S3: Start power-off state: Start relay 303 to disconnect the power supply to carbon canister solenoid valve 1 and switch to power-off state;

[0043] S4: Secondary pressure monitoring at port T: Start the guide fan 209 to ventilate the vent pipe 205. If the monitored pressure value is within the threshold B, it indicates that the gas is not flowing when the carbon canister solenoid valve 1 is closed.

[0044] S5: A and P port flow status monitoring: In the closed state, the air flow in the loop vent pipe 202 is observed by observing the flow monitor 203 to determine whether the A port 103 and P port 102 are flowing normally.

[0045] Working Principle: The diagnostic mechanism 2 is installed outside the carbon canister solenoid valve 1 and in a fixed position together with it. The pressure at port T is monitored in real time by observing the pressure readings of the pressure monitor 206, thus monitoring whether the sealing state of the carbon canister solenoid valve 1 is normal. The airflow in the loop vent pipe 202 is monitored by the flow monitor 203, thus determining whether ports A 103 and P 102 are functioning correctly. This allows for automatic monitoring of the carbon canister solenoid valve 1 without disassembly, preventing unnoticed problems and energy waste. Furthermore, during driving, the power-off mechanism 3 allows for temporary disconnection of the vehicle's power supply to the carbon canister solenoid valve 1 via a one-button monitoring function on the vehicle's center console. This enables the diagnostic mechanism 2 to diagnose the carbon canister solenoid valve 1 in a power-off state, and power is restored via relay 303 after diagnosis. This allows for real-time, on-site diagnosis of the carbon canister solenoid valve 1 while driving.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A diagnostic device for a carbon canister solenoid valve, comprising a diagnostic mechanism (2), characterized in that, The diagnostic mechanism (2) is installed on the carbon canister solenoid valve (1), and the carbon canister solenoid valve (1) is equipped with a power-off mechanism (3) and a binding mechanism (4). The carbon canister solenoid valve (1) includes a solenoid valve body (101), a P port (102), an A port (103), a T port (105), and a power supply interface (104). The diagnostic unit (2) includes a first adapter pipe (201), and the first adapter pipe (201) is sleeved on the P port (102). A loop vent pipe (202) is provided in the middle section of the first adapter pipe (201), and a flow monitor (203) is provided on the loop vent pipe (202). The diagnostic unit (2) also includes a second adapter pipe (204), which is fitted onto the T port (105). One end of the second adapter pipe (204) is connected to a vent pipe (205). The vent pipe (205) has two states: air extraction and air supply. One end of the vent pipe (205) is connected to the output end of a pressure monitor (206). The input end of the pressure monitor (206) is tightly connected to a funnel-shaped vent pipe (207). A guide fan (209) is installed inside the funnel-shaped vent pipe (207). One end of the funnel-shaped vent pipe (207) is tightly connected to a vent bend pipe (208).

2. The carbon canister solenoid valve diagnostic device according to claim 1, characterized in that, The power-off mechanism (3) includes an adapter socket (301), which is snapped onto the outside of the power supply interface (104), and one end of the adapter socket (301) is fixedly connected to a ribbon cable (302).

3. The carbon canister solenoid valve diagnostic device according to claim 2, characterized in that, The adapter socket (301) is connected to an adapter (304) via a ribbon cable (302), and the adapter (304) is consistent with the power supply interface (104). A relay (303) is provided in the middle section of the ribbon cable (302).

4. The carbon canister solenoid valve diagnostic device according to claim 1, characterized in that, The binding mechanism (4) includes a support plate (401), and the support plate (401) is connected to the pressure monitor (206). An elastic snap ring (402) is fixedly connected to one side of the outer wall of the support plate (401), and the elastic snap ring (402) is movably snapped onto the outside of the solenoid valve body (101).

5. A diagnostic device for a carbon canister solenoid valve according to claim 4, characterized in that, The outer walls of the elastic snap ring (402) on both sides are fixedly connected to a first long snap groove (403) and a second long snap groove (404), and a short snap groove (405) is fixedly connected to one side of the outer wall of the second long snap groove (404).

6. A diagnostic device for a carbon canister solenoid valve according to claim 5, characterized in that, The first long card slot (403) is movably connected to the first long card strip (406), and the second long card slot (404) is movably connected to the second long card strip (410). The first long card strip (406) and the second long card strip (410) are simultaneously connected to the outer wall of one side of the first long card strip (406) and the second long card strip (410) with the first elastic net (407).

7. A diagnostic device for a carbon canister solenoid valve according to claim 6, characterized in that, The first elastic net (407) surrounds the outside of the carbon canister solenoid valve (1) and the diagnostic mechanism (2), and the first elastic net (407) is in contact with the input end of the venting bend (208). A short card strip (409) is movably engaged in the short card slot (405), and a second elastic net (408) is connected to one side of the outer wall of the short card strip (409) and the first long card strip (406).

8. A diagnostic method for a carbon canister solenoid valve diagnostic device, applied to the carbon canister solenoid valve diagnostic device as described in claim 3, characterized in that, The specific steps include the following: S1: Set threshold: Based on the specifications of the carbon canister solenoid valve (1) used, simulate and calculate and set the numerical analysis threshold A and threshold B of the device, where threshold A is the pressure threshold when the air is pumped in the vent pipe (205), threshold B is the pressure threshold when the air is supplied in the vent pipe (205), and the value of threshold A is less than the value of threshold B. S2: T port real-time pressure monitoring: During the use of the carbon canister solenoid valve (1), gas is supplied from T port (105) to P port (102), and negative pressure suction is simultaneously provided to the vent pipe (205). The value of the pressure monitor (206) is normal if it is within the threshold A. S3: Start power-off state: Start relay (303) to disconnect the power supply to carbon canister solenoid valve (1) and switch to power-off state; S4: T-port secondary pressure monitoring: Start the guide fan (209) to ventilate the vent pipe (205). If the monitored pressure value is within the threshold B, it indicates that the gas does not flow when the carbon canister solenoid valve (1) is closed. S5: A and P port flow status monitoring: Under closed conditions, the air flow in the loop ventilation pipe (202) is observed by observing the flow monitor (203) to determine whether the A port (103) and P port (102) are flowing normally.

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