Heating type air inlet temperature and pressure sensor

Abstract

The invention provides a heating type air inlet temperature and pressure sensor. The heating type inlet air temperature and pressure sensor comprises a shell, a processing module, a power strip and a detection piece, the shell is internally provided with three independent cavities, namely a first cavity, a second cavity and a third cavity, the third cavity is a sealed cavity, and the processing module is connected into the third cavity; the detection piece is fixedly connected to a port of the second cavity and is in signal communication with the processing module, the side portion of the shell is provided with an opening communicated with the third cavity, the end cover is connected to the opening of the third cavity in a sealed mode, and the heating assembly, the positioning block and the processing module are all located in the third cavity. The positioning block and the heating assembly are both connected to the bottom of the third cavity and are adjacent left and right, the processing module is connected to the upper portion of the positioning block, and when the heating assembly works, the temperature in the third cavity can be increased. The heating type inlet air temperature and pressure sensor is high in stability.

Description

Technical Field

[0001] This invention relates to the field of mechanical technology, and more specifically to a heated intake air temperature and pressure sensor. Background Technology

[0002] As a key component of modern electronic fuel injection engines (especially turbocharged or direct injection engines), the intake air temperature and pressure sensor is mainly used to monitor the absolute pressure and temperature of air in the intake manifold in real time. This sensor provides core data to the engine control unit (ECU) and has a direct impact on air-fuel ratio control, ignition timing, boost control, and emissions performance.

[0003] In recent years, the development of new energy vehicles has been rapid. Unlike pure electric new energy vehicles, range-extended, plug-in hybrid, and other new energy vehicles still need to be equipped with an intake air temperature and pressure sensor to monitor the air-fuel mixture ratio of the engine, thereby achieving optimal fuel consumption and emissions.

[0004] Meanwhile, the new exhaust gas recirculation (EGR) strategy requires the EGR system to operate in low-temperature environments. In cold regions, the range extender system operates in a low-temperature and high-humidity environment, which can easily lead to chip icing failure (the chip has a pressure detection function; icing can block the chip's sensing holes, preventing it from working properly and thus preventing the EGR system from starting), resulting in decreased stability of the sensors in low-temperature environments. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by providing an automotive intake air temperature and pressure sensor that can maintain normal operation even under low-temperature conditions.

[0006] To achieve the above objectives, the present invention can be implemented through the following technical solutions:

[0007] A heated intake air temperature and pressure sensor includes a housing, a processing module, a connector, and a detection element. The housing has three independent cavities: cavity one, cavity two, and cavity three. Cavity three is a sealed cavity, and the processing module is connected inside cavity three. Cavities one and two are adjacent to cavity three.

[0008] The cavity has an opening at one outer end, and the aforementioned power strip is fixedly connected to this opening. The power strip is connected to the processing module. When an external connector is inserted into the outer end of the cavity, data from the processing module can be transmitted to the outside via the power strip.

[0009] The cavity has two openings at its outer ends, and the aforementioned detection element is fixedly connected to the two ports of the cavity and is in signal communication with the processing module.

[0010] It is characterized in that it further comprises a heating assembly, a positioning block and an end cover, the shell side part has an opening in communication with the cavity three, the end cover is sealingly connected at the opening of the cavity three, the heating assembly, the positioning block and the processing module are all located at the cavity three,

[0011] The positioning block and the heating assembly are both connected at the bottom of the cavity three and are arranged adjacent to each other, and the processing module is connected at the upper part of the positioning block, so that the temperature in the cavity three can be raised when the heating assembly is in operation.

[0012] In the heating type intake air temperature and pressure sensor, the plug strip comprises a long sheet-shaped plug sheet one and a plug sheet two, the outer ends of the plug sheet one and the plug sheet two are located at the opening of the outer end of the cavity one, the inner end of the plug sheet one is fixedly connected with the processing module, and the inner end of the plug sheet two is connected with the heating assembly.

[0013] In the heating type intake air temperature and pressure sensor, the middle part of the plug sheet one has a bent connecting section, the positioning block is wrapped on the connecting section of the plug sheet, and the inner end of the plug sheet one is fixedly connected with the processing module.

[0014] In the heating type intake air temperature and pressure sensor, the processing module comprises a pcb substrate and electrical elements located thereon, the pcb substrate has a protruding positioning column thereon, the positioning block has a positioning hole matched with the positioning column and the positioning column is embedded in the positioning hole.

[0015] In the heating type intake air temperature and pressure sensor, the heating assembly comprises potting glue and a PTC heating sheet, and the potting glue wraps the PTC heating sheet therein.

[0016] In the heating type intake air temperature and pressure sensor, the inner end of the plug sheet one is connected with the PTC heating sheet.

[0017] In the heating type intake air temperature and pressure sensor, the opening of the cavity three has a recessed step seat, the end cover is a cylindrical structure with an open bottom and has an outwardly protruding contact edge at the lower end of the end cover, the contact edge abuts against the step seat, a sealing groove is formed between the step seat, the contact edge and the outer side of the end cover, and the sealing groove is filled with sealing glue.

[0018] In the heating type intake air temperature and pressure sensor, the end cover has an anti-explosion structure.

[0019] In the heating type intake air temperature and pressure sensor, the anti-explosion structure is a U-shaped recess one recessed at the inner top of the end cover.

[0020] In the heating type intake air temperature pressure sensor, the top of the end cover also has two straight recesses, the two recesses one are symmetrically distributed on both sides of the recess two, and the U-shaped notches of the two recesses two are opposite.

[0021] Compared with the prior art, the heating type intake air temperature pressure sensor not only avoids the condition of too low temperature in the cavity three, but also solves the problem of stable release of high pressure in the cavity three when the temperature is high, so that the stability is higher.

[0022] Meanwhile, the setting of the end cover not only facilitates the installation of the positioning block, the heating assembly and the processing module, but also can be replaced alone after damage, so as to reduce the use cost as much as possible, and has high practical value. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of the heating type intake air temperature pressure sensor.

[0024] Figure 2 is a schematic diagram of the cross-sectional structure of the heating type intake air temperature pressure sensor.

[0025] Figure 3 is a schematic diagram of the structure of the socket connection.

[0026] Figure 4 is a schematic diagram of the structure of the socket connection from another perspective.

[0027] Figure 5 is a schematic diagram of the top cover from the bottom.

[0028] In the drawings:

[0029] 1, shell; 101, cavity one; 102, cavity two; 103, cavity three; 1031, step seat; 2, processing module; 21, positioning column; 3, socket; 31, insert piece one; 311, connecting section; 32, insert piece two; 4, detection piece; 5, positioning block; 51, positioning hole; 6, end cover; 61, contact edge; 62, recess one; 63, recess two; 8, potting glue; 9, PTC heating sheet; 10, sealing glue. DETAILED DESCRIPTION

[0030] The following is a specific embodiment of the present application and further describes the technical solution of the present application in combination with the drawings.

[0031] As Figures 1-5As shown, the heating type intake temperature and pressure sensor comprises a shell 1, a processing module 2, a socket 3 and a detection piece 4, the shell 1 has three independent cavities: cavity one 101, cavity two 102 and cavity three 103, the cavity three 103 is a sealed cavity and the processing module 2 is connected in the cavity three 103, the cavity one 101 and the cavity two 102 are adjacent to the cavity three 103,

[0032] The cavity one 101 is open at the outer end, the socket 3 is fixedly connected at the port of the cavity one 101, the socket 3 is connected with the processing module 2, when the external connector is inserted into the outer end of the cavity one 101, the data information at the processing module 2 can be transmitted to the outside through the socket 3,

[0033] The cavity two 102 is open at the outer end, the detection piece 4 is fixedly connected at the port of the cavity two 102 and the detection piece 4 is in signal communication with the processing module 2,

[0034] It also comprises a heating assembly, a positioning block 5 and an end cover 6, the shell 1 has an opening communicating with the cavity three 103, the end cover 6 is sealingly connected at the opening of the cavity three 103, the heating assembly, the positioning block 5 and the processing module 2 are all located at the cavity three 103,

[0035] The positioning block 5 and the heating assembly are both connected at the bottom of the cavity three 103 and are arranged left and right adjacent to each other, the processing module 2 is connected at the upper part of the positioning block 5, when the heating assembly works, the temperature in the cavity three 103 can be raised.

[0036] The three cavities on the shell 1 have their own independent functions.

[0037] The cavity one 101 is used for connecting the socket 3, the cavity two 102 is used for connecting the detection piece 4, and the cavity three 103 is used for connecting the processing module 2. Of course, the socket 3 and the detection piece 4 are both connected with the processing module 2 and realize data conduction.

[0038] That is, the actual parameter information detected at the detection piece 4 can be stably input to the processing module 2, and the information collected by the processing module 2 is transmitted to the outside by the plug connected with the socket 3, for example, the EGR system of the automobile.

[0039] In this embodiment, the detection piece 4 is an NTC temperature sensor.

[0040] The heating type intake temperature and pressure sensor creatively stably connects the processing module 2 in the cavity three 103 through the positioning block 5, and stably raises the temperature in the cavity three 103 through the heating assembly. Even in extremely cold weather, the processing module 2 can still work stably under the action of the heating assembly, effectively improving its stability.

[0041] The socket 3 comprises a long sheet-shaped first insertion sheet 31 and a second insertion sheet 32, the outer ends of the first insertion sheet 31 and the second insertion sheet 32 are located at the outer end opening of the cavity 101, the inner end of the first insertion sheet 31 is fixedly connected with the processing module 2, and the inner end of the second insertion sheet 32 is connected with the heating assembly.

[0042] The middle part of the first insertion sheet 31 has a bent connecting section 311, the positioning block 5 is wrapped on the connecting section 311 of the first insertion sheet 31, and the inner end of the first insertion sheet 31 is fixedly connected with the processing module 2.

[0043] The first insertion sheet 31 is not only used for power supply to the processing module 2, but also realizes data communication through the first insertion sheet 31.

[0044] The second insertion sheet 32 is used for stable power supply to the heating assembly.

[0045] The processing module 2 comprises a pcb substrate and electrical elements located thereon, the pcb substrate has a protruding positioning column 21, the positioning block 5 has a positioning hole 51 matched with the positioning column 21, and the positioning column 21 is embedded in the positioning hole 51.

[0046] After the positioning column 21 is connected with the positioning hole 51 in a matched mode, the processing module 2 can be stably connected on the positioning block 5.

[0047] The heating assembly comprises a potting glue 8 and a PTC heating sheet 9, and the potting glue 9 wraps the PTC heating sheet 9.

[0048] The potting glue 8 can meet the requirements of high temperature resistance and good heat conductivity, and is a key material in the fields of high reliability such as electronics, electric power, and new energy (such as electric vehicles, photovoltaic inverters, and battery management systems).

[0049] The PTC heating sheet 9 is free from moisture, vibration, and dust erosion, and needs to efficiently export heat and stably work in a high temperature environment for a long time.

[0050] The inner end of the first insertion sheet 31 is connected with the PTC heating sheet 9.

[0051] The opening of the cavity three 103 has a recessed step seat 1031, the end cover 6 is a bottom-opened cylindrical structure and has an outwardly protruding contact edge 61 at the lower end of the end cover 6, the contact edge 61 abuts against the step seat 1031, a sealing groove is formed between the step seat 1031, the contact edge 61 and the outer side of the end cover 6, and the sealing groove is filled with sealing glue 10.

[0052] After the step seat 1031 is connected with the contact edge 61 in a matched mode, a top-opened sealing groove is formed between the step seat 1031 and the contact edge 61, and after the sealing glue 10 is filled in the sealing groove, the sealing property between the end cover 6 and the shell 1 can be effectively improved.

[0053] The end cover 6 has an explosion-proof structure.

[0054] When used in extremely cold weather, the temperature difference between the inside and outside of the shell 1 is relatively large, which can cause the pressure in the cavity three 103 to be too large. Once the pressure in the cavity three 103 is too large, the explosion-proof structure is broken under the action of the high pressure, thereby eliminating the internal pressure of the cavity three 103 and avoiding more serious situations, such as the explosion of the entire sensor.

[0055] The explosion-proof structure is a U-shaped recess 62 recessed at the top of the end cover 6.

[0056] According to the actual situation, another scheme can also be used, that is, the top of the end cover 6 also has a recess two 63 recessed in a straight line. The number of the recess one 62 is two and the two recesses one 62 are symmetrically distributed on both sides of the recess two 63, and the U-shaped notches of the two recesses two 63 are opposite.

[0057] Whether it is a recess one 62 arranged alone or a recess one 62 symmetrically arranged on both sides of the recess two 63, once the pressure in the cavity three 103 is too large, the recess one 62 or the recess two 63 of the end cover 6 is broken under the action of high pressure, thereby effectively eliminating the high pressure in the cavity three 103 and improving safety.

[0058] In this embodiment, the depth of the recess one 62 and the recess two 63 is 3 / 4 of the thickness of the end cover 6.

[0059] The heating type intake air temperature and pressure sensor not only avoids the condition that the temperature in the cavity three is too low, but also solves the problem of stable release of high pressure in the cavity three when the temperature is high, so it has high stability.

[0060] At the same time, the setting of the end cover not only facilitates the installation of the positioning block, the heating assembly and the processing module, but also can be replaced individually after damage to minimize the use cost, and has high practical value.

[0061] The technical scheme of the above application provides a significantly different solution from the prior art, and the parts not involved in the technical scheme of the application are the same as or can be realized by the prior art, and will not be described again.

[0062] The technical scheme in the above embodiment has clearly and completely described the content of the application. Obviously, the described embodiment is only a part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the application.

Claims

1. A heated intake air temperature and pressure sensor, comprising a housing, a processing module, a connector, and a detection element, wherein the housing has three independent cavities: cavity one, cavity two, and cavity three, cavity three being a sealed cavity in which the processing module is connected, and cavities one and two being adjacent to cavity three. The cavity has an opening at one outer end, and the aforementioned power strip is fixedly connected to this opening. The power strip is connected to the processing module. When an external connector is inserted into the outer end of the cavity, data from the processing module can be transmitted to the outside via the power strip. The cavity has two openings at its outer ends, and the aforementioned detection element is fixedly connected to the two ports of the cavity and is in signal communication with the processing module. Its features are, It also includes a heating assembly, a positioning block, and an end cap. The side of the housing has three openings that communicate with the cavity. The end caps are sealed to the three openings of the cavity. The heating assembly, positioning block, and processing module are all located at the three points of the cavity. The positioning block and the heating component are both connected to the bottom of the cavity and are arranged adjacent to each other on the left and right. The above-mentioned processing module is connected to the upper part of the positioning block. When the heating component is working, it can increase the temperature inside the cavity.

2. The heated intake air temperature and pressure sensor according to claim 1, characterized in that, The power strip includes a first and a second long plate. The outer ends of the first and second plates are located at the outer opening of the cavity. The inner end of the first plate is fixed to the processing module, and the inner end of the second plate is connected to the heating component.

3. The heated intake air temperature and pressure sensor according to claim 2, characterized in that, The insert has a bent connecting section in the middle, and the positioning block covers the connecting section of the insert. The inner end of the insert is fixedly connected to the processing module.

4. The heated intake air temperature and pressure sensor according to claim 1, 2, or 3, characterized in that, The processing module includes a PCB substrate and electrical components located thereon. The PCB substrate has protruding positioning posts, and the positioning blocks have positioning holes that match the positioning posts, with the positioning posts embedded in the positioning holes.

5. The heated intake air temperature and pressure sensor according to claim 4, characterized in that, The heating assembly includes a potting compound and a PTC heating element, wherein the potting compound encapsulates the PTC heating element therein.

6. The heated intake air temperature and pressure sensor according to claim 4, characterized in that, The inner end of the insert is connected to the PTC heating element.

7. The heated intake air temperature and pressure sensor according to claim 1, 2, or 3, characterized in that, The opening of the cavity three has a recessed stepped seat. The end cap is a cylindrical structure with a bottom opening and an outwardly protruding contact edge at the lower end of the end cap. The contact edge abuts against the stepped seat. A sealing groove is formed between the stepped seat, the contact edge and the outer side of the end cap. The sealing groove is filled with sealant.

8. The heated intake air temperature and pressure sensor according to claim 1, 2, or 3, characterized in that, The end cap has an explosion-proof structure.

9. The heated intake air temperature and pressure sensor according to claim 8, characterized in that, The explosion-proof structure is a U-shaped recess located at the top of the end cap.

10. The heated intake air temperature and pressure sensor according to claim 8, characterized in that, The top of the end cap also has a straight recessed groove 2. There are two grooves 1, and the two grooves 1 are symmetrically distributed on both sides of the groove 2. The U-shaped notches of the two grooves 2 face each other.

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