Temperature and pressure detection device for fuel steam pipeline of motor vehicle

Abstract

The utility model relates to a temperature and pressure detection device for a fuel steam pipeline of a motor vehicle. The temperature and pressure detection device comprises a shell, a temperature detection component and a pressure detection component which are installed in the shell respectively, and a connector component which is detachably connected to the shell and comprises a main pipe and a branch pipe extending out of the middle section of the main pipe basically in the radial direction of the main pipe. The main pipe is configured to be capable of being connected into the fuel steam pipeline, and the branch pipe is configured to receive the part, extending out of the shell, of the temperature detection component so that the sensing end of the temperature detection component can be arranged in the main pipe. The temperature and pressure detection device provided by the utility model realizes the function of detecting the temperature and the pressure in the fuel steam pipeline by using a single device, and saves the installation space.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile engines, in particular to a temperature and pressure detection device for a fuel vapor pipeline of a motor vehicle. Background Art

[0002] The EVAP system is usually composed of a fuel tank, a carbon canister, and a carbon canister solenoid valve. The carbon canister can store the fuel vapor generated in the fuel tank and has three ports, two of which are connected to the fuel tank and the atmosphere respectively, for collecting and adsorbing the fuel vapor through the activated carbon particles inside it, and the other port is connected to the engine's intake manifold through the fuel vapor pipeline as an outlet, thereby sending the collected fuel vapor into the intake manifold in a timely manner, mixing with the normal mixed gas and then entering the engine for combustion, so that the fuel is fully utilized.

[0003] It is usually necessary to monitor the fuel vapor pressure and temperature in the fuel vapor pipeline of the fuel evaporation control system to ensure its normal operation. To this end, it is known to connect a pressure sensor and a temperature sensor to the fuel vapor pipeline for detection. However, such a solution requires a complex structure, occupies a lot of space, and also causes difficulties in the overall design of the engine. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above problems and / or other problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, according to one aspect of the utility model, a temperature and pressure detection device for a fuel vapor pipeline of a motor vehicle is provided, the temperature and pressure detection device comprising a housing and a temperature detection member and a pressure detection member respectively installed in the housing. The bottom wall of the housing has a bottom opening, and the temperature detection member extends from the housing via the bottom opening. The temperature and pressure detection device also includes a joint member, which is connected to the housing in a detachable manner, and includes a main pipe and a branch pipe extending from the middle section of the main pipe substantially in the radial direction of the main pipe, the main pipe is configured to be connected to the fuel vapor pipeline, and the branch pipe is configured to receive the portion of the temperature detection member extending from the housing, so that the sensing end of the temperature detection member is placed in the main pipe.

[0006] According to an embodiment of the present invention, the temperature and pressure detection device further includes a support member, which is disposed between the housing and the joint member and is configured to support and guide a portion of the temperature detection member extending from the housing.

[0007] According to one embodiment of the utility model, the supporting member is funnel-shaped and has a first end and a second end, the first end is detachably connected to the shell, and the second end is provided with a plurality of guide plates arranged at intervals along its circumference to guide the fluid in the main pipe to flow around the sensing end of the temperature detection member.

[0008] According to an embodiment of the present invention, the first end of the support member has a profile matching the bottom opening of the housing and includes a pair of lugs, and the lugs are configured to be inserted into grooves arranged on the housing.

[0009] According to an embodiment of the present invention, the housing comprises two first side walls arranged opposite to each other, an interface portion is provided extending from one of the first side walls along the axial direction of the main pipe, and the interface portion accommodates a pin electrically connected to the temperature detection component.

[0010] According to an embodiment of the present utility model, the shell further includes two second side walls arranged opposite to each other, and the joint component includes a snap-fit ​​structure connected to the two second side walls.

[0011] According to an embodiment of the present invention, the buckle structure includes two hooks opposite to each other, and the two hooks are intended to be respectively hooked to the protrusions arranged on the second side wall.

[0012] According to an embodiment of the present utility model, the two ends of the main pipe respectively have two limiting parts opposite to each other on the outer peripheral surface, and a sealing ring can be placed between the two limiting parts.

[0013] According to one embodiment of the utility model, the top wall of the shell is provided with a fluid through hole, and the temperature and pressure detection device also includes a filter membrane arranged at the fluid through hole and a protective cover detachably connected to the shell, and the protective cover covers the filter membrane.

[0014] According to an embodiment of the present utility model, the temperature detection component and the pressure detection component are bonded in the housing through a colloid structure formed by an adhesive.

[0015] The temperature and pressure detection device of the utility model is connected to the fuel vapor pipeline through the detachable connection of the joint component and the shell, and the pressure detection component and the temperature detection component are simultaneously connected to the fuel vapor pipeline through the joint component. Not only is it possible to simultaneously set a main pipe, a temperature detection component and a pressure detection component that can be connected to the fuel vapor pipeline in the temperature and pressure detection device, but it also saves installation space and provides a new idea for the overall design of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as limiting the present invention, wherein:

[0017] Figure 1 A perspective view showing a temperature and pressure detection device for a fuel vapor pipeline of a motor vehicle according to an exemplary embodiment of the present utility model.

[0018] Figure 2 Show Figure 1 A three-dimensional view of the housing of the temperature and pressure detection device shown.

[0019] Figure 3 Show Figure 1 A top view of the temperature and pressure detection device shown.

[0020] Figure 4 Show Figure 3 The temperature and pressure detection device shown is a cross-sectional view along line AA.

[0021] Figure 5 Show Figure 3 The temperature and pressure detection device shown is a cross-sectional view along line BB.

[0022] Description of reference numerals:

[0023] 1. Shell; 11. Bottom opening; 12. First side wall; 13. Interface; 14. Second side wall; 141. Raised portion; 15. Top wall; 151. Fluid through hole; 16. Bottom wall; 17. Groove; 2. Insert pin; 3. Temperature detection component; 31. Sensing end; 4. Connector component; 41. Main pipe; 42. Branch pipe; 43. Buckle structure; 431. Hook; 44. Limiting portion; 5. Support component; 51. Guide vane; 52. Lug; 6. Sealing ring; 7. Protective cover; 8. Colloid structure. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless clearly stated in the claims.

[0025] In the following, terms such as "first", "second", etc. are used to describe the elements of the present application. These terms are only used to distinguish the various elements, and are not used to limit the nature, order or number of these elements. The terms "including" and "having" are used to express an open-ended inclusive meaning, and mean that there may be additional elements / components in addition to the listed elements / components.

[0026] Figures 1 to 5 FIG. 1 shows a temperature and pressure detection device for a fuel vapor pipeline of a motor vehicle according to an embodiment of the utility model. Figure 1 , Figure 4 and Figure 5 As shown, the temperature and pressure detection device according to this embodiment mainly includes a housing 1, a pin 2, a temperature detection member 3, a pressure detection member (not shown), a joint member 4, a support member 5, a sealing ring 6, a filter membrane (not shown), a protective cover 7 and a colloid structure 8. The pin 2 made of a conductive material is arranged in the housing 1 and extends out of the housing 1 from one side of the housing 1, as shown in FIG. Figure 4 and Figure 5 As shown. The temperature detection component 3 can be a temperature sensor, a thermistor or other element that can sense temperature. It is arranged in the housing 1 and electrically connected to the pin 2 (for example, the pin of the temperature detection component is connected to the pin 2 by soldering). In order to detect the temperature of the fuel vapor in the fuel vapor pipeline, a part of the temperature detection component 3 can extend from the housing 1 so that it can be placed in the flow of fuel vapor. The pressure detection component can be a pressure sensor or other element that can detect the pressure value. It is arranged in the housing 1 and electrically connected to the pin 2. Thus, the temperature detection component 3 and the pressure detection component can be electrically connected to a circuit board or controller outside the temperature and pressure detection device, such as an electronic control unit (ECU) of a motor vehicle, via the pin 2 at the same time. In some other embodiments, for example, when the cavity structure space of the housing 1 is large enough, the circuit board can still be arranged in the housing 1, and the temperature detection component 3 and the pressure detection component can be directly electrically connected to the circuit board.

[0027] Preferably, the temperature detection member 3, the pressure detection member, the plug pin 2 and other electrical components are bonded in the housing 1 by forming a colloid structure 8 with an adhesive. For example, the adhesive is at least provided at the welding connection points between the temperature detection member 3 and the pressure detection member and the plug pin 2, thereby at least forming a covering effect on these welding connection points, which is conducive to avoiding poor contact between the temperature detection member 3 and the pressure detection member and the plug pin 2.

[0028] According to an embodiment of the housing 1, Figure 2 and Figure 5As shown, the shell 1 may include two first side walls 12 arranged opposite to each other, two second side walls 14 arranged opposite to each other, a top wall 15 arranged at the top of the first side wall 12 and the second side wall 14, and a bottom wall 16 arranged at the bottom of the first side wall 12 and the second side wall 14, thereby forming a parallelepiped-shaped cavity structure. An interface portion 13 is extended from one of the first side walls 12 to receive the pin of the pin 2 extending from the shell 1. The interface portion 13 can receive a cable so that the pin 2 (thereby enabling the temperature detection component 3 and the pressure detection component) to be electrically connected to an external circuit board or controller via the cable. The outer periphery of each second side wall 14 is respectively provided with a protruding portion 141 protruding outwardly for connecting the connector component 4 to be described in detail below. The top wall 15 is provided with a fluid through hole 151, and a filter membrane can be provided at the fluid through hole 151 to filter the fluid flowing through the fluid through hole 151. As shown Figure 1 , 3 -5, a protective cover 7 may be provided above the top wall 15, and the protective cover 7 may be detachably mounted to the housing 1 and cover the fluid communication hole 151, thereby providing protection for the filter membrane. The bottom wall 16 may be provided with grooves 17 at positions corresponding to the two second side walls 14, respectively, for mounting the support member 5 to be described in detail below.

[0029] According to one embodiment of the joint member 4, Figure 2 , Figure 4 and Figure 5 As shown, the joint member 4 may include a main pipe 41, a branch pipe 42 and a snap-fit ​​structure 43. The main pipe 41 has a predetermined length extending in the axial direction and is configured to be connected to the fuel vapor pipeline at both ends of the main pipe 41 in the axial direction. To this end, the outer peripheral surface of the two axial ends of the main pipe 41 may be provided with flanges, thereby forming a connection structure similar to a bamboo joint. The branch pipe 42 extends from the middle section of the main pipe 41 in the length direction and extends substantially in the radial direction of the main pipe 41. The inner cavities of the main pipe 41 and the branch pipe 42 are interconnected. In this way, when the joint member 4 is snapped on the housing 1, the branch pipe 42 can receive the portion of the temperature detection member 3 extending from the housing 1, thereby placing the sensing end 31 of the temperature detection member 3 in the main pipe 41. Although in the embodiment shown in the figure, the branch pipe 42 and the main pipe 41 are positioned approximately perpendicular to each other; however, in some embodiments, the branch pipe 42 and the main pipe 41 can also be arranged according to the actual environment so that the branch pipe 42 and the main pipe 41 are oriented in relative directions, for example, oriented obliquely to each other.

[0030] Preferably, in addition to the bamboo-joint connection structure at both ends of the axial direction of the main pipe 41, it can also have two opposite limit portions 44, preferably on the outside of the bamboo joint. The two limit portions 44 can be formed by two adjacent annular protrusions formed on the outer peripheral surface of the main pipe 41, and a circumferential groove for receiving the sealing ring 6 can be formed between them. Therefore, when the temperature and pressure detection device of the utility model is to be used, the temperature and pressure detection device can be fixed to the fuel vapor pipeline by the interference fit between the bamboo joint on the main pipe 41 of the joint member 4 and the fuel vapor pipeline, and can be sealed by the sealing ring 6 to prevent leakage of fuel vapor in the pipeline.

[0031] The buckle structure 43 of the joint member 4 is used to connect the joint member 4 to the housing 1, and may include two hooks 431, such as Figure 1 and Figure 4 The two hooks 431 can be spaced apart in the radial direction of the main pipe 41, and can be hooked on the two second side walls 14 of the housing 1, especially the protrusions 141 thereon, respectively. Figure 1 and 4 As shown in , the buckle structure 43 may include a tab having a certain elasticity and a central opening, and the hook portion 431 may be disposed on the tab.

[0032] According to one embodiment of the supporting member 5, Figure 4 and Figure 5 As shown, the support member 5 is disposed between the housing 1 and the joint member 4 , and is configured to support and guide a portion of the temperature detection member 3 protruding from the housing 1 .

[0033] Specifically, continue to refer to Figure 4 and Figure 5 The support member 5 is generally in the shape of a funnel that is wide at the top and narrow at the bottom, and has a first end located at the top and a second end located at the bottom. The first end is detachably connected to the housing 1, and may have a profile that matches the bottom opening 11 of the housing 1, so as to block the bottom opening 11 after being connected to the housing 1. For example, a pair of lugs 52 may be provided at the top of the first end, and the lugs 52 may be inserted into the grooves 17 provided on the bottom wall 16 of the housing 1, thereby connecting the support member 5 and the housing 1 together.

[0034] The second end of the support member 5 can be inserted into the branch pipe 42 of the joint member 4, and a plurality of guide vanes 51 arranged at intervals along the circumference thereof are provided at the end. The plurality of guide vanes 51 can be constructed and arranged so that the fluid in the main pipe 41 can flow around the sensing end 31 of the temperature detection member 3 located in the center of the guide vanes 51, thereby increasing the contact probability between the fluid and the sensing end 31, and further increasing the accuracy of the sensing end 31. For example, all the guide vanes 51 can be constructed to extend inwardly from the inner side surface of the support member 5 along the radial direction of the support member 5 to approach the sensing end 31 of the temperature detection member 3.

[0035] As described above, compared with the technical solutions in the prior art that require complex structures to connect the pressure sensor and the temperature sensor separately, the temperature and pressure detection device according to the utility model simultaneously connects the pressure detection component and the temperature detection component 3 to the fuel vapor pipeline through the detachable connection between the joint component 4 and the shell 1, which not only realizes the simultaneous detection of temperature and pressure through a single device, but also saves installation space, providing a new idea for the overall design of the engine.

[0036] In addition, by providing a plurality of guide plates 51 on the support member 5 for supporting the sensing end 31 of the temperature detection member 3, the contact between the fluid in the main pipe 41 (that is, the fluid in the fuel vapor pipeline) and the sensing end 31 can be increased as much as possible, thereby improving the accuracy of the temperature detection member 3 in detecting the temperature.

[0037] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from the practice of the utility model disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the utility model is specified by the appended claims and their equivalents.

Claims

1. A temperature and pressure detection device for a fuel vapor pipeline of a motor vehicle, comprising: A housing (1), wherein a bottom wall (16) of the housing has a bottom opening (11); as well as a temperature detection component (3) and a pressure detection component respectively installed in the housing (1), wherein the temperature detection component (3) extends out from the housing (1) via the bottom opening (11), It is characterized in that The temperature and pressure detection device further comprises a joint component (4), which is connected to the housing (1) in a detachable manner and comprises a main pipe (41) and a branch pipe (42) extending from a middle section of the main pipe (41) substantially in a radial direction of the main pipe (41), the main pipe (41) being configured to be connected to the fuel vapor pipeline, and the branch pipe (42) being configured to receive a portion of the temperature detection component (3) extending from the housing (1) so that the sensing end (31) of the temperature detection component (3) is placed in the main pipe (41).

2. The temperature and pressure detection device according to claim 1, characterized in that: The temperature and pressure detection device further comprises a support member (5) which is arranged between the housing (1) and the joint member (4) and is configured to support and guide a portion of the temperature detection member (3) extending from the housing (1).

3. The temperature and pressure detection device according to claim 2, characterized in that: The support member (5) is funnel-shaped and has a first end and a second end, the first end being detachably connected to the housing (1), and the second end being provided with a plurality of guide plates (51) arranged at intervals along its circumference, so as to guide the fluid in the main pipe (41) to flow around the sensing end (31) of the temperature detection member (3).

4. The temperature and pressure detection device according to claim 3, characterized in that: The first end of the support member (5) has a profile matching the bottom opening (11) of the housing (1) and includes a pair of lugs (52) configured to be inserted into a groove (17) arranged on the housing (1).

5. The temperature and pressure detection device according to any one of claims 1 to 4, characterized in that: The housing (1) comprises two first side walls (12) arranged opposite to each other, and an interface portion (13) is provided extending from one of the first side walls (12) along the axial direction of the main pipe (41), wherein the interface portion (13) accommodates a pin (2) electrically connected to the temperature detection component (3).

6. The temperature and pressure detection device according to claim 5, characterized in that: The housing (1) further comprises two second side walls (14) arranged opposite to each other, and the joint component (4) comprises a snap-fit ​​structure (43) connected to the two second side walls (14).

7. The temperature and pressure detection device according to claim 6, characterized in that: The snap-fit ​​structure (43) comprises two hooks (431) facing each other, and the two hooks (431) are intended to be respectively hooked onto the protrusions (141) provided on the second side wall (14).

8. The temperature and pressure detection device according to any one of claims 1 to 4, characterized in that: The two ends of the main pipe (41) are respectively provided with two limiting portions (44) opposite to each other on the outer peripheral surface, and a sealing ring (6) can be placed between the two limiting portions (44).

9. The temperature and pressure detection device according to any one of claims 1 to 4, characterized in that: The top wall (15) of the housing (1) is provided with a fluid through hole (151), and the temperature and pressure detection device further comprises a filter membrane arranged at the fluid through hole (151) and a protective cover (7) connected to the housing in a detachable manner, wherein the protective cover (7) covers the filter membrane.

10. The temperature and pressure detection device according to any one of claims 1 to 4, characterized in that: The temperature detection component (3) and the pressure detection component are bonded inside the housing (1) via a colloid structure (8) formed by an adhesive.

Images