CN204439134U - A kind of corrosion-resistant baroceptor detected for inlet manifold - Google Patents
A kind of corrosion-resistant baroceptor detected for inlet manifold Download PDFInfo
- Publication number
- CN204439134U CN204439134U CN201520150890.4U CN201520150890U CN204439134U CN 204439134 U CN204439134 U CN 204439134U CN 201520150890 U CN201520150890 U CN 201520150890U CN 204439134 U CN204439134 U CN 204439134U
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- thermistor
- lower cover
- cavity
- pressure chip
- upper cover
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Abstract
The utility model relates to a kind of corrosion-resistant baroceptor detected for inlet manifold, and it comprises upper cover body, lower cover, terminal group, pressure chip IC, peripheral circuit, pcb board and thermistor; Upper cover body and lower cover are the shaping working of plastics of integral molded plastic, and the junction of upper cover body and lower cover is provided with the Baltimore groove being coated with epoxy resin and carrying out sealing; Lower cover has air intake opening; Pressure chip IC is fixed on pcb board; Thermistor is by two-sided welding, then after bending, viscose glue is fixed on pcb board; Upper cover body and lower cover are sealed and matched formation hollow cavity, hollow cavity has two independently the first cavity and the second cavitys, pressure chip IC and thermistor are arranged in the first cavity be connected with air intake opening, and peripheral circuit is arranged in the second airtight cavity be not connected with air intake opening.This sensor construction is simple, reasonable in design, has good corrosion resistance, outward appearance not easy damaged, cost is low and thermistor vibration resistance ability is strong feature.
Description
Technical field
The utility model relates to sensor technical field, is specifically related to a kind of corrosion-resistant baroceptor detected for inlet manifold.
Background technology
At present, the overall package of the pressure transducer in motor car engine generally adopts the mode of metal shell to encapsulate, and its weak point is that the cost of metal is high, work flow long (needing machining, electroplating processes), outward appearance easy damaged, corrosion-resistant etc.The sealing of conventional pressure sensor is by the O-ring seal compression between pressure ring and housing, O-ring seal compression between terminal and housing seals sensor, its weak point is that assembly technology difficulty is large, flow process is loaded down with trivial details, cost high (part of needs is many).In addition, the thermistor of conventional pressure sensor is just welded on board pads or inserted sheet, does not have other to fix, and its weak point is that vibration resistance is indifferent.
Utility model content
For the problems referred to above that prior art exists, the purpose of this utility model is to provide a kind ofly has good corrosion resistance, the outward appearance baroceptor detected for inlet manifold that easy damaged, cost are not low and thermistor vibration resistance ability is strong.
For achieving the above object, the utility model adopts following technical scheme: a kind of corrosion-resistant baroceptor detected for inlet manifold, comprises upper cover body, lower cover, terminal group, pressure chip IC and peripheral circuit thereof, also comprise pcb board and thermistor; Described upper cover body and lower cover are the shaping working of plastics of integral molded plastic, and the junction of upper cover body and lower cover is provided with the Baltimore groove being coated with epoxy resin and carrying out sealing; Described lower cover has air intake opening; Described pressure chip IC is fixed on pcb board; Described thermistor is by two-sided welding, then after bending, viscose glue is fixed on pcb board; Described upper cover body and lower cover are sealed and matched formation hollow cavity, described hollow cavity has two independently the first cavity and the second cavitys, the pressure chip IC being fixed on pcb board is arranged in thermistor the first cavity be connected with air intake opening, and described peripheral circuit is arranged in the second airtight cavity be not connected with air intake opening.
As optimization, described pressure chip IC 2. pin connect with terminal 5V, pressure chip IC 6. pin, 8. pin connect with terminal GND, pressure chip IC 7. pin connects with terminal Vout.
As optimization, described thermistor is NTC thermistor.
Relative to prior art, the utility model tool has the following advantages: the corrosion-resistant baroceptor structure detected for inlet manifold that the utility model provides is simple, reasonable in design, has good corrosion resistance, outward appearance not easy damaged, cost is low and thermistor vibration resistance ability is strong feature; Introduce thermistor, also make this sensor can carry out the measurement of pressure and temperature, in addition, this sensor also makes the structure of engine compacter simultaneously.
Accompanying drawing explanation
Fig. 1 is the inner structure schematic diagram of the corrosion-resistant baroceptor for inlet manifold detection.
Fig. 2 is the connection diagram of pressure chip IC and thermistor.
In figure, upper cover body 11, lower cover 12, air intake opening 12a, terminal group 13, Baltimore groove 14, first cavity 15, second cavity 16, pressure chip IC21a, pcb board 21b, thermistor 22, O-ring seal 23, silica gel 24, circuit board 25.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
In description of the present utility model, it will be appreciated that, orientation or the position relationship of the instruction such as term " interior ", " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
Term " first ", " second " conveniently describe, and do not represent quantity, therefore can not to be interpreted as restriction of the present utility model.
See Fig. 1 to Fig. 2, a kind of corrosion-resistant baroceptor detected for inlet manifold, comprises upper cover body 11, lower cover 12, terminal group 13, pressure chip IC21a and peripheral circuit thereof, also comprises pcb board 21b and thermistor 22.
Upper cover body 11 and lower cover 12 are the shaping working of plastics of integral molded plastic, have abandoned traditional metalwork, overcome that metalwork cost is high, the processing of work flow lead aircraft, electroplating processes, outward appearance easy damaged, corrosion-resistant deficiency.The junction of upper cover body 11 and lower cover 12 is provided with the Baltimore groove 14 being coated with epoxy resin and carrying out sealing, by Baltimore groove be coated with fluid sealant and carry out the sealing means that alternative conventional pressure sensor compressed by O-ring seal, overcome that assembly technology difficulty is large, flow process is loaded down with trivial details, the deficiency that cost part that is high and that need is many.
In the sidewall of upper cover body 11, and be positioned at the part that described four terminals stretch out and be provided with another Baltimore groove being coated with epoxy resin and carrying out sealing; Prevent sensor external air and steam from entering in the hollow cavity of sensor from the faying face of terminal and upper cover body.
Lower cover 12 has air intake opening 12a; Pressure chip IC21a is fixed on pcb board 21b, and thermistor 22 is by two-sided welding, then after bending, viscose glue is fixed on pcb board 21b.The fixing of thermistor then adopts two-sided welding and mode fixing after root bending is substituted conventional single welding, overcomes the problem that thermistor vibration resistance is indifferent.Two pins of thermistor 22 connect with the terminal MAT in terminal group 13, terminal GND respectively; Common thermistor be single-sided welding on circuit boards, other place does not support, the de-usability affecting sensor of easily being shaken by thermistor weld when vibrating.The place of circuit board welding thermistor, when designing, is designed to metallic vias by the utility model, adopts two-sided welding during welding.In addition, thermistor root is vertically turned up 90 degree again after circuit board plane direction bending 90 degree, and the root after bending is coated SP190 epoxy resin and is fixed, and guarantees that thermistor weld does not stress.
Thermistor 22 is preferably NTC thermistor.Namely the function of MAP temperature sensor can be realized.When intake air temperature is low, the resistance value of NTC thermistor is large, and the signal voltage of sensor input ECU is high, and NTC thermistor 20 DEG C of precision are 2%, substantially increase the validity of measurement result.
Upper cover body 11 and lower cover 12 are sealed and matched formation hollow cavity, described hollow cavity has two independently the first cavity 15 and the second cavitys 16, the pressure chip IC21a being fixed on pcb board 21b is arranged in first cavity 15 of be connected with air intake opening 12a (namely the first cavity 13 is connected with inlet manifold) with thermistor 22, described peripheral circuit is arranged in the second airtight cavity 16 of be not connected with air intake opening 12a (namely the second cavity 14 is not connected with inlet manifold), require lower to electronic devices and components like this, and electronic devices and components are not subject to, the pollution of the material of coming in from inlet manifold and impact.
Pressure chip IC21a 2. pin connect with terminal 5V, pressure chip IC21a 6. pin, 8. pin connect with terminal GND, pressure chip IC21a 7. pin connects with terminal Vout.
Aforementioned epoxy resins is the DP190 bicomponent epoxy resin that 3M company produces.
The application principle that the utility model is used for the corrosion-resistant baroceptor that inlet manifold detects is as follows:
After the corrosion-resistant baroceptor being used for inlet manifold detection is installed, it is according to engine load conditions, measure the change of pressure in inlet manifold, and convert thereof into voltage signal, the electronic control unit ECU of motor car engine is delivered to, as the foundation determining basic fuel injection amount together with tach signal.ECU is by the force value of rotating speed of automobile engine and inlet manifold, calculate air inflow, according to the number control distributive value of air inflow, the gasoline in cylinder and air is made to carry out accurate proportioning according to optimal air-fuel ratio, fuel combustion is complete, with improve engine dynamic property, reduce oil consumption, reduce toxic emission and carry out fault detect.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (3)
1. the corrosion-resistant baroceptor detected for inlet manifold, comprise upper cover body (11), lower cover (12), terminal group (13), pressure chip IC(21a) and peripheral circuit, it is characterized in that: also comprise pcb board (21b) and thermistor (22);
Described upper cover body (11) and lower cover (12) are the shaping working of plastics of integral molded plastic, and the junction of upper cover body (11) and lower cover (12) is provided with the Baltimore groove (14) being coated with epoxy resin and carrying out sealing;
Described lower cover (12) has air intake opening (12a);
Described pressure chip IC(21a) be fixed on pcb board (21b);
Described thermistor (22) is by two-sided welding, then after bending, viscose glue is fixed on pcb board (21b);
Described upper cover body (11) and lower cover (12) are sealed and matched formation hollow cavity, described hollow cavity has two independently the first cavity (15) and the second cavitys (16), be fixed on the pressure chip IC(21a of pcb board (21b)) be arranged in thermistor (22) the first cavity (15) be connected with air intake opening (12a), described peripheral circuit is arranged in airtight the second cavity (16) be not connected with air intake opening (12a).
2. as claimed in claim 1 for the corrosion-resistant baroceptor of inlet manifold detection, it is characterized in that: described pressure chip IC(21a) 2. pin connect with terminal 5V, pressure chip IC(21a) 6. pin, 8. pin connect with terminal GND, pressure chip IC(21a) 7. pin connect with terminal Vout.
3., as claimed in claim 1 or 2 for the corrosion-resistant baroceptor that inlet manifold detects, it is characterized in that: described thermistor (22) is NTC thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520150890.4U CN204439134U (en) | 2015-03-17 | 2015-03-17 | A kind of corrosion-resistant baroceptor detected for inlet manifold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520150890.4U CN204439134U (en) | 2015-03-17 | 2015-03-17 | A kind of corrosion-resistant baroceptor detected for inlet manifold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204439134U true CN204439134U (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520150890.4U Expired - Fee Related CN204439134U (en) | 2015-03-17 | 2015-03-17 | A kind of corrosion-resistant baroceptor detected for inlet manifold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204439134U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370218A (en) * | 2016-11-10 | 2017-02-01 | 上海感先汽车传感器有限公司 | Intake air pressure and temperature sensor and manufacturing method therefor |
| CN107389136A (en) * | 2017-08-28 | 2017-11-24 | 浙江沃得尔科技股份有限公司 | A kind of inlet manifold sensor construction |
-
2015
- 2015-03-17 CN CN201520150890.4U patent/CN204439134U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370218A (en) * | 2016-11-10 | 2017-02-01 | 上海感先汽车传感器有限公司 | Intake air pressure and temperature sensor and manufacturing method therefor |
| CN107389136A (en) * | 2017-08-28 | 2017-11-24 | 浙江沃得尔科技股份有限公司 | A kind of inlet manifold sensor construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20160317 |
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| CF01 | Termination of patent right due to non-payment of annual fee |