Carbon tank electromagnetic valve, evaporative emission control system of vehicle and vehicle

Abstract

The utility model discloses a carbon tank solenoid valve, an evaporative emission control system of a vehicle and the vehicle. The carbon tank solenoid valve comprises a valve body, a valve core, a solenoid valve core and a solenoid valve core, and the pressure detection piece is arranged on the electric control board. Therefore, by arranging the electric control board in the carbon tank electromagnetic valve, the pressure detection piece can be conveniently fixed on the electric control board so as to be conveniently fixed in the carbon tank electromagnetic valve, so that the pressure detection function of the carbon tank electromagnetic valve can be increased, and the emission leakage of the evaporative emission control system can be conveniently diagnosed; in addition, the structure compactness of the carbon tank electromagnetic valve can be improved, the occupied area of the carbon tank electromagnetic valve in a vehicle can be reduced, connecting wire harnesses in the carbon tank electromagnetic valve can be reduced, and therefore the whole vehicle cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a carbon canister solenoid valve, a vehicle evaporative emission control system and a vehicle. Background Art

[0002] The carbon canister and the carbon canister solenoid valve are two important components of the gasoline evaporative emission control system. When the vehicle stops running, the control module will send an electrical signal to the carbon canister solenoid valve, and the carbon canister solenoid valve will turn into a closed state. At this time, the entire evaporative emission control system forms a closed circuit. The system detects changes in the system pressure value through the pressure sensor on the fuel tank, and can detect whether there is a leak in the gas circuit, that is, whether the oil-gas mixture is at risk of being discharged into the atmosphere without being filtered by the carbon canister.

[0003] In the prior art, the carbon canister solenoid valve does not have a pressure measurement function. Therefore, it is necessary to add a pressure sensor to the pipeline after the carbon canister solenoid valve to measure the pressure value of the pipeline. In addition, it is necessary to add a pressure sensor mounting base to fix the pressure sensor, which takes up a large space and also requires a wiring harness for the pressure sensor, resulting in a high overall cost. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a carbon canister solenoid valve, which can reduce the occupied area and reduce the cost of the whole vehicle.

[0005] Another object of the present invention is to provide an evaporative emission control system for a vehicle.

[0006] Another object of the present invention is to provide a vehicle.

[0007] The carbon canister solenoid valve according to the embodiment of the utility model comprises: a valve body, in which an electric control board is arranged; and a pressure detection component, which is arranged on the electric control board.

[0008] Therefore, by setting an electronic control board in the carbon canister solenoid valve, it is convenient to fix the pressure detection component on the electronic control board so as to fix it inside the carbon canister solenoid valve. This not only increases the pressure detection function of the carbon canister solenoid valve and facilitates the diagnosis of emission leaks in the evaporative emission control system, but also improves the structural compactness of the carbon canister solenoid valve, reduces the occupied area of ​​the carbon canister solenoid valve in the vehicle, and reduces the connecting wiring harness in the carbon canister solenoid valve, thereby reducing the overall vehicle cost of the vehicle.

[0009] In some examples of the present invention, the pressure detection component includes a pressure detection chip and a signal processing chip, and the pressure detection chip and the signal processing chip are integrated on the electronic control board.

[0010] In some examples of the present invention, the valve body is provided with an air inlet and an air outlet which are interconnected, and the electric control board is arranged adjacent to the air outlet compared to the air inlet.

[0011] In some examples of the present utility model, a cavity is provided in the valve body, the cavity is communicated with the air outlet, and the electric control board is provided in the cavity.

[0012] In some examples of the present utility model, the carbon canister solenoid valve further includes a connector, the connector is used to be electrically connected to an external component, and the electric control board is electrically connected to the connector.

[0013] In some examples of the present invention, the connector includes a pressure signal pin, and the signal processing chip is electrically connected to the pressure signal pin.

[0014] In some examples of the present utility model, the carbon canister solenoid valve further includes a solenoid coil, and the solenoid coil is electrically connected to the connector and the electric control board respectively.

[0015] In some examples of the present invention, the connector includes an electromagnetic coil control pin, and the electromagnetic coil is electrically connected to the electromagnetic coil control pin.

[0016] The evaporative emission control system of a vehicle according to the utility model comprises the carbon canister solenoid valve mentioned above.

[0017] The vehicle according to the utility model comprises the above-mentioned evaporative emission control system for the vehicle.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic diagram of a carbon canister solenoid valve according to an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of electrical connection of a carbon canister solenoid valve, a solenoid coil and a connector according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 100. Carbon canister solenoid valve;

[0024] 10. Valve body; 11. Electric control panel; 12. Air inlet; 13. Air outlet; 14. Cavity;

[0025] 20. Pressure testing parts;

[0026] 30. Connector; 31. Pressure signal pin; 32. Solenoid coil control pin; 33. Power pin; 34. Power ground pin;

[0027] 40. Electromagnetic coil. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0029] Reference below Figure 1-Figure 2 The carbon canister solenoid valve 100 according to the embodiment of the utility model is described. The carbon canister solenoid valve 100 of the utility model can be applied to an evaporative emission control system of a vehicle. The evaporative emission control system of the vehicle in the utility model can be applied to a vehicle.

[0030] Combination Figure 1 As shown, the carbon canister solenoid valve 100 according to the utility model can mainly include: a valve body 10 and a pressure detection component 20, wherein an electric control board 11 is arranged in the valve body 10 of the carbon canister solenoid valve 100, and the electric control board 11 can provide a stable and reliable setting position for the chip in the carbon canister solenoid valve 100, and can ensure the structural stability of the chip in the carbon canister solenoid valve 100.

[0031] Furthermore, the carbon canister solenoid valve 100 of the utility model further includes a pressure detection member 20, which can detect the pressure in the carbon canister solenoid valve 100. When the vehicle stops running, the vehicle control module sends an electrical signal to the carbon canister solenoid valve 100, and the carbon canister solenoid valve 100 changes from an open state to a closed state after receiving the signal. At this time, the gasoline evaporative emission control system of the whole vehicle forms a closed circuit, and the pressure value in the carbon canister solenoid valve 100 and the change of the pressure value can be detected by the pressure detection member 20. In this way, the vehicle control module can diagnose and detect whether there is leakage in the evaporative emission control system through the pressure detected by the pressure detection member 20 and the change of the pressure value, and can detect whether the oil-gas mixture is completely filtered by the carbon canister before being discharged into the outside atmosphere, thereby ensuring the reliability of the oil-gas mixture in the vehicle's evaporative emission control system being filtered by the carbon canister, which is conducive to ensuring the reliability of the carbon canister in reducing the vehicle's fuel consumption.

[0032] Furthermore, the pressure detection component 20 is arranged on the electric control board 11. In the utility model, by arranging the pressure detection component 20 on the electric control board 11, the pressure detection component 20 can be arranged in the valve body 10 of the carbon canister solenoid valve 100. Compared with the prior art which requires a pressure sensor to be fixed on the pipeline after the carbon canister solenoid valve 100 in conjunction with the pressure sensor mounting base to measure the pressure value of the pipeline, the electric control board 11 in the utility model occupies a smaller area, and the pressure detection component 20 can be fixed in the valve body 10 of the carbon canister solenoid valve 100, so that the pressure detection component 20 is directly in contact with the gas in the carbon canister solenoid valve 100, which can not only improve the structural compactness of the carbon canister solenoid valve 100, but also improve the detection accuracy of the carbon canister solenoid valve 100 for the gas pressure, thereby improving the reliability of the vehicle's control module diagnosis and detection of whether there is a leak in the evaporative emission control system.

[0033] According to an embodiment of the utility model, the pressure detection component 20 includes a pressure detection chip and a signal processing chip, and the pressure detection chip and the signal processing chip are integrated and arranged on the electric control board 11. Specifically, in the utility model, the pressure detection chip in the pressure detection component 20 can be used to detect the pressure of the gas passing through the valve body 10 of the carbon canister solenoid valve 100, and a corresponding pressure signal can be obtained. The pressure detection chip and the signal processing chip are jointly arranged on the electric control board 11, which can ensure that the pressure detection chip and the signal processing chip are electrically connected. The pressure detection chip can transmit the obtained pressure signal to the signal processing chip, and the signal processing chip can process and amplify the obtained pressure signal so as to facilitate transmission to the control module of the vehicle, so that the control module of the vehicle can obtain the pressure signal in the carbon canister solenoid valve 100, so as to facilitate the control module to diagnose and detect whether there is a leakage in the evaporative emission control system.

[0034] Combination Figure 1 As shown, the valve body 10 is provided with an air inlet 12 and an air outlet 13 which are interconnected, and the electric control board 11 is arranged adjacent to the air outlet 13 compared to the air inlet 12. Specifically, the valve body 10 of the carbon canister solenoid valve 100 is provided with an air inlet 12 and an air outlet 13 which are interconnected, and the gas in the pipeline can enter the carbon canister solenoid valve 100 through the air inlet 12, and after the gas flows through the flow channel inside the valve body 10 and the pressure detection component 20, it can flow out of the carbon canister solenoid valve 100 from the air outlet 13, so that the gas can flow freely in the carbon canister solenoid valve 100, so as to ensure the normal operation of the evaporative emission control system of the vehicle.

[0035] Furthermore, the carbon canister solenoid valve 100 is located at the rear end of the carbon canister and is connected to the intake system of the engine. Compared with the intake port 12, the electric control board 11 is arranged near the outlet port 13, so that the pressure detection component 20 on the electric control board 11 can detect the pressure of the carbon canister solenoid valve 100 near the outlet port 13. In this way, the pressure detection component 20 can directly detect the pressure of the gas that flows to the engine intake system after being filtered by the carbon canister, so as to ensure the reliability of the carbon canister absorbing the oil vapor from the fuel tank until the oil vapor of the carbon canister is saturated. The vacuum degree or other forms of negative pressure in the engine intake manifold can suck the fuel vapor stored in the carbon canister into the engine's intake pipe and send it to the engine's cylinder for combustion, thereby effectively reducing emissions, saving fuel and preventing excessive fuel vapor.

[0036] Combination Figure 1 As shown, a cavity 14 is provided in the valve body 10, and the cavity 14 is connected to the gas outlet 13, and the electric control board 11 is provided in the cavity 14. Specifically, the cavity 14 is provided in the valve body 10, and the cavity 14 can provide space for the flow of gas in the carbon canister solenoid valve 100. The cavity 14 is connected to the gas outlet 13, so that the gas entering the cavity 14 can flow directly to the gas outlet 13, and can flow directly out of the carbon canister solenoid valve 100 from the gas outlet 13. The electric control board 11 is provided in the cavity 14, so that not only the cavity 14 can provide a stable and reliable setting position for the electric control board 11, but also can ensure that the electric control board 11 is located at the position where the gas flows to the gas outlet 13, so that the pressure detection component 20 can be arranged adjacent to the gas outlet 13, so that the pressure detection component 20 can accurately measure the gas pressure at the position adjacent to the gas outlet 13 in the carbon canister solenoid valve 100, which can further improve the accuracy of the control module in diagnosing and detecting whether there is a leakage in the evaporative emission control system.

[0037] Combination Figure 1 As shown, the carbon canister solenoid valve 100 also includes a connector 30, and the connector 30 is used to electrically connect with external components, and the electric control board 11 is electrically connected to the connector 30. Specifically, the connector 30 can be used to electrically connect the vehicle wiring harness with the carbon canister solenoid valve 100. In the evaporative emission control system of the vehicle, the carbon canister solenoid valve 100 is in a normally open state, and is electrically connected to the vehicle wiring harness through the connector 30, so that the vehicle's control module can control the opening and closing of the carbon canister solenoid valve 100. In addition, the electric control board 11 in the valve body 10 is electrically connected to the connector 30, so that the electric control board 11 can be electrically connected to the vehicle's control module through the connector 30 to ensure that the pressure detection component 20 can transmit the pressure signal to the vehicle's control module.

[0038] Combination Figure 2As shown, the connector 30 includes a pressure signal pin 31, and the signal processing chip is electrically connected to the pressure signal pin 31. Specifically, the connector 30 is provided with a pressure signal pin 31, and the pressure signal pin 31 can be used to receive and transmit the pressure signal in the vehicle. The signal processing chip on the electric control board 11 is electrically connected to the pressure signal pin 31, so that after the signal processing chip processes and amplifies the received pressure signal, the pressure signal can be transmitted to the control module of the vehicle through the pressure signal pin 31 to ensure the transmission stability of the pressure signal in the vehicle wiring harness, so as to ensure the detection reliability of the control module of the vehicle.

[0039] Combination Figure 1 As shown, the carbon canister solenoid valve 100 further includes an electromagnetic coil 40, which is electrically connected to the connector 30 and the electric control board 11, respectively. Specifically, the carbon canister solenoid valve 100 is further provided with an electromagnetic coil 40, which is wound on a coil frame, and the electromagnetic coil 40 can be used to control the opening and closing of the carbon canister solenoid valve 100. One end of the electromagnetic coil 40 is electrically connected to the electric control board 11, and the other end is electrically connected to the connector 30. On the one hand, the current in the electromagnetic coil 40 can form a loop so that the electromagnetic coil 40 generates a magnetic field, and on the other hand, the electromagnetic coil 40 can control the opening and closing of the carbon canister solenoid valve 100 according to the input of the control signal.

[0040] Combination Figure 2 As shown, the connector 30 includes a solenoid coil control pin 32, and the solenoid coil 40 is electrically connected to the solenoid coil control pin 32. Specifically, the solenoid coil control pin 32 can be used to input a control signal to the solenoid coil 40, so that the vehicle control module can send a control signal to the solenoid coil 40, and input a signal through the solenoid coil control pin 32 to realize the opening and closing functions of the carbon canister solenoid valve 100. After the vehicle stops running, the vehicle control module can send an electrical signal to the carbon canister solenoid valve 100, and the carbon canister solenoid valve 100 changes from an open state to a closed state after receiving the signal, so that the gasoline evaporative emission control system of the whole vehicle forms a closed circuit, and then the pressure value in the carbon canister solenoid valve 100 and the change of the pressure value can be detected by the pressure detection component 20, so that the vehicle control module can diagnose and detect whether there is a leakage in the evaporative emission control system.

[0041] Combination Figure 2As shown, in the present invention, the connector 30 of the carbon canister solenoid valve 100 also includes a power pin 33 and a power ground pin 34, which are used to connect the electric control board 11 and the electromagnetic coil 40 in the carbon canister solenoid valve 100 to the power supply and form a loop in the carbon canister solenoid valve 100. The pressure signal pin 31, the electromagnetic coil control pin 32, the power pin 33 and the power ground pin 34 are sequentially arranged in intervals in the connector 30 to ensure that the electrical signal and the pressure signal are normally connected between the carbon canister solenoid valve 100 and the vehicle wiring harness, which can prevent the evaporative emission system of the vehicle from short circuiting.

[0042] According to the embodiment of the utility model, the carbon canister solenoid valve 100 can be applied to the evaporative emission control system of the vehicle. The carbon canister solenoid valve 100 in the utility model has a pressure detection component 20, which can be used to detect the gas pressure value between the carbon canister solenoid valve 100 and the engine intake system to diagnose whether there is a gas leak in the evaporative emission control system of the vehicle, thereby ensuring the reliability of the oil-gas mixture in the evaporative emission control system of the vehicle passing through the carbon canister for filtration, which is conducive to ensuring the reliability of the carbon canister in reducing the fuel consumption of the vehicle. It should also be noted that the pressure detection chip in the utility model can adopt different models and specifications according to the design requirements of the vehicle.

[0043] According to the embodiment of the utility model, the evaporative emission control system of the vehicle equipped with the carbon canister solenoid valve 100 of the utility model can be applied to the vehicle, and the carbon canister solenoid valve 100 of the utility model is provided with a cavity 14 inside, and the pressure detection component 20 is provided in the cavity 14 through the electric control board 11, so that the pressure detection component 20 can be provided inside the carbon canister solenoid valve 100, so as to reduce the pressure sensor mounting base for mounting the pressure detection component 20 in the prior art, thereby reducing the space occupied by the carbon canister solenoid valve 100 in the vehicle, which is conducive to improving the compactness of the vehicle structure. The carbon canister solenoid valve 100 of the utility model can be applied to vehicles of different models.

[0044] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "circumferential", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0046] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A carbon canister solenoid valve, characterized in that: include: A valve body (10), wherein an electric control panel (11) is arranged in the valve body (10); A pressure detection component (20), wherein the pressure detection component (20) is arranged on the electric control board (11).

2. The canister solenoid valve according to claim 1, characterized in that: The pressure detection component (20) comprises a pressure detection chip and a signal processing chip, and the pressure detection chip and the signal processing chip are integrated on the electric control board (11).

3. The canister solenoid valve according to claim 1, characterized in that: The valve body (10) is provided with an air inlet (12) and an air outlet (13) which are interconnected, and the electric control board (11) is arranged adjacent to the air outlet (13) compared to the air inlet (12).

4. The canister solenoid valve according to claim 3, characterized in that: A cavity (14) is provided in the valve body (10), the cavity (14) is communicated with the air outlet (13), and the electric control board (11) is arranged in the cavity (14).

5. The canister solenoid valve according to claim 2, characterized in that: It also includes a connector (30), the connector (30) being used for electrically connecting to an external component, and the electric control board (11) being electrically connected to the connector (30).

6. The canister solenoid valve according to claim 5, characterized in that: The connector (30) comprises a pressure signal pin (31), and the signal processing chip is electrically connected to the pressure signal pin (31).

7. The canister solenoid valve according to claim 6, characterized in that: It also includes an electromagnetic coil (40), which is electrically connected to the connector (30) and the electric control board (11) respectively.

8. The canister solenoid valve according to claim 6, characterized in that: The connector (30) comprises an electromagnetic coil control pin (32), and the electromagnetic coil (40) is electrically connected to the electromagnetic coil control pin (32).

9. An evaporative emission control system for a vehicle, characterized in that: include: The carbon canister solenoid valve (100) according to any one of claims 1 to 8.

10. A vehicle, characterized in that: An evaporative emission control system for a vehicle including the one described in claim 9.

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