CN106032998A - Sensor used for detecting automobile inlet manifold temperature and pressure - Google Patents
Sensor used for detecting automobile inlet manifold temperature and pressure Download PDFInfo
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- CN106032998A CN106032998A CN201510116068.0A CN201510116068A CN106032998A CN 106032998 A CN106032998 A CN 106032998A CN 201510116068 A CN201510116068 A CN 201510116068A CN 106032998 A CN106032998 A CN 106032998A
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- terminal
- cover body
- upper cover
- circuit board
- pressure
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Abstract
The invention relates to a sensor used for detecting an automobile inlet manifold temperature and pressure. An upper cover body and a lower cover body are plastic parts formed through overall injection molding. A juncture of the upper cover body and the lower cover body is provided with a first concave groove which is coated with epoxy resin so as to carry out sealing. The lower cover body possesses an air inlet. Two pins of a thermistor are connected to a terminal MAT and a terminal GND of a terminal group respectively. A circuit board assembly comprises a circuit board and a pressure chip IC fixed to the circuit board. A second pin of the pressure chip IC is connected to a terminal 5V. A sixth pin and an eighth pin of the pressure chip IC are connected to the terminal GND. A seventh pin of the pressure chip IC is connected to a terminal Vout. The sensor possesses characteristics that the structure is simple and the design is reasonable; corrosion resistance performance is good; an appearance is not easy to damage; cost is low and a vibration resistance capability of the thermistor is good.
Description
Technical field
The present invention relates to a kind of sensor technical field, particularly to a kind of sensor for detecting automotive air intake manifold temperature and pressure.
Background technology
At present, the overall package of the pressure transducer in automobile engine typically uses the mode of metal shell to be packaged, and its weak point is the cost height of metal, work flow length (needing machining, electroplating processes), outward appearance easy damaged, corrosion-resistant etc..The sealing of conventional pressure sensor is to be compressed by the sealing ring between pressure ring and housing, sensor is sealed by the sealing ring compression between terminal and housing, its weak point is that assembly technology difficulty is big, flow process is loaded down with trivial details, and cost is high (part of needs is many).It addition, the critesistor of conventional pressure sensor is only welded on board pads or inserted sheet, not having other to fix, its weak point is that vibration resistance is indifferent.
Summary of the invention
The problems referred to above existed for prior art, it is an object of the invention to provide and a kind of have the sensor for detecting automotive air intake manifold temperature and pressure that good corrosion resistance, outward appearance not easy damaged, low cost and critesistor vibration resistance ability are strong.
For achieving the above object, the present invention adopts the following technical scheme that a kind of sensor for detecting automotive air intake manifold temperature and pressure, including upper cover body, lower cover, terminal group, circuit board assembly, critesistor and sealing ring；Described upper cover body and lower cover seal and cooperatively form hollow cavity, and described circuit board assembly and critesistor are arranged in hollow cavity；Described terminal group includes four terminals, is terminal 5V respectively, terminal Vout, terminal MAT and terminal GND；
Described upper cover body and lower cover are the junction of the working of plastics of integral molded plastic molding, upper cover body and lower cover and are provided with the first Baltimore groove that painting epoxy resin carries out sealing;On described lower cover, there is air inlet；Two pins of described critesistor connect with terminal MAT, the terminal GND of terminal group respectively；Described circuit board assembly include circuit board and pressure chip IC fixed thereon, the of pressure chip IC 2. foot connects with terminal 5V, the of pressure chip IC 6. foot, 8. foot connect with terminal GND, pressure chip IC 7. foot connects with terminal Vout.
As optimization, described critesistor is NTC thermistor.
As optimization, in described terminal group, one end of four terminals is stretched out from the sidewall of upper cover body respectively, in the sidewall of described upper cover body, and is positioned in described terminal group the part that four terminals stretch out and is provided with and is coated with the second Baltimore groove that epoxy resin carries out sealing.
Relative to prior art, present invention have the advantage that the present invention provides simple, reasonable in design for detecting the sensor construction of automotive air intake manifold temperature and pressure, have the advantages that good corrosion resistance, outward appearance not easy damaged, low cost and critesistor vibration resistance ability are strong；Introduce critesistor, also make this sensor can carry out the measurement of pressure and temperature, it addition, the structure that this sensor also makes electromotor is compacter simultaneously.
Accompanying drawing explanation
The internal structure schematic diagram of the sensor that Fig. 1 provides for the present invention.
Fig. 2 is the connection diagram of pressure chip IC and critesistor.
In figure, upper cover body 11, lower cover 12, air inlet 12a, terminal group the 13, first Baltimore groove 14, pressure chip
IC21a, circuit board 21b, critesistor 22, sealing ring 23, silica gel 24.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
In describing the invention, 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, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Term " first ", " second " are to describe for convenience, do not represent quantity, are therefore not considered as limiting the invention.
Seeing Fig. 1 to Fig. 2, a kind of sensor for detecting automotive air intake manifold temperature and pressure, including upper cover body 11, lower cover 12, terminal group 13, circuit board assembly, critesistor 22 and sealing ring 23；
Described upper cover body 11 and lower cover 12 sealing cooperatively form hollow cavity, described circuit board assembly and critesistor 22 and are arranged in hollow cavity；
Described terminal group 13 includes four terminals, is terminal 5V respectively, terminal
Vout, terminal MAT and terminal GND, in terminal group 13, one end of four terminals is stretched out from the sidewall of upper cover body 11 respectively；Described upper cover body 11 and lower cover 12 are the working of plastics of integral molded plastic molding, integral plastics moulding, have abandoned traditional metalwork, overcome metalwork cost height, the machining of work flow length, electroplating processes, outward appearance easy damaged, the deficiency of corrosion-resistant.The junction of upper cover body 11 and lower cover 12 is provided with and is coated with the first Baltimore groove 14 that epoxy resin carries out sealing;By the first Baltimore groove be coated with fluid sealant and substitute the sealing means that conventional pressure sensor compresses by sealing ring, overcome that assembly technology difficulty is big, flow process is loaded down with trivial details, the deficiency that high and needs the part of cost is many.
In the sidewall of described upper cover body 11, and it is positioned at the part that described four terminals stretch out and is provided with and is coated with the second Baltimore groove that epoxy resin carries 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.
There is on lower cover 12 air inlet 12a；Critesistor 22 is fixed on circuit board 21b by viscose glue after two-sided welding, then bending, and the fixing of critesistor then uses two-sided welding and mode fixing after root bending substitutes the single welding of routine, overcomes the problem that critesistor vibration resistance is indifferent.Two pins of critesistor 22 respectively with the terminal in terminal group 13
MAT, terminal GND connect；Common critesistor be single-sided welding on circuit boards, other place does not support, the de-serviceability affecting sensor of easily being shaken by critesistor weld when vibration.The place welding critesistor on circuit board, when design, is designed to metallic vias by the present invention, uses two-sided welding during welding.It addition, critesistor root is the most vertically turned up 90 degree after circuit board plane direction bending 90 degree, the root after bending is coated SP190 epoxy resin and is fixed, it is ensured that critesistor weld does not stresses.
Critesistor 22 preferably NTC thermistor.I.e. can realize the function of MAP temperature sensor.When intake air temperature is low, the resistance value of NTC thermistor is big, and the signal voltage of sensor input ECU is high, and 20 DEG C of precision of NTC thermistor are 2%, substantially increase the validity of measurement result.
Circuit board assembly includes circuit board 21b and pressure chip IC21a fixed thereon, circuit board 21b and contact site, upper cover body 11 medial wall silica gel
24 seal, and the of pressure chip IC21a 2. foot connects with terminal 5V, the of pressure chip IC21a 6. foot, 8. foot connect with terminal GND, pressure chip IC21a 7. foot connects with terminal Vout.
Aforementioned epoxy resins is the DP190 bicomponent epoxy resin that 3M company produces.
The application principle of the present invention sensor for detecting automotive air intake manifold temperature and pressure is as follows:
It is used for detecting after the sensor of automotive air intake manifold temperature and pressure installs by the present invention, 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 automobile engine is delivered to, as the foundation determining basic fuel injection amount together with tach signal.ECU passes through rotating speed of automobile engine and the force value of inlet manifold, it is calculated air inflow, how many control distributive values according to 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, to improve the dynamic property of electromotor, reduce oil consumption, minimizing waste gas discharge and carry out fault detect.
Finally illustrate is, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent, without deviating from objective and the scope of technical solution of the present invention, it all should be contained in the middle of scope of the presently claimed invention.
Claims (3)
1. for detecting a sensor for automotive air intake manifold temperature and pressure, including upper cover body (11), lower cover (12), terminal group (13), circuit board assembly, critesistor (22) and sealing ring (23)；Described upper cover body (11) and lower cover (12) sealing cooperatively form hollow cavity, described circuit board assembly and critesistor (22) and are arranged in hollow cavity；Described terminal group (13) includes four terminals, is terminal 5V respectively, terminal Vout, terminal MAT and terminal GND；
It is characterized in that: described upper cover body (11) and lower cover (12) are the working of plastics of integral molded plastic molding, the junction of upper cover body (11) and lower cover (12) is provided with and is coated with the first Baltimore groove (14) that epoxy resin carries out sealing;
There is on described lower cover (12) air inlet (12a)；
Two pins of described critesistor (22) connect with terminal MAT, the terminal GND of terminal group (13) respectively；
Described circuit board assembly includes circuit board (21b) and pressure chip IC(21a fixed thereon), pressure chip IC(21a) 2. foot connect with terminal 5V, pressure chip IC(21a) the 6. foot, the 8. foot and terminal
GND connects, pressure chip IC(21a) 7. foot connect with terminal Vout.
2. sensor as claimed in claim 1, it is characterised in that: described critesistor (22) is NTC thermistor.
Sensor the most as claimed in claim 1 or 2, it is characterized in that: in described terminal group (13), one end of four terminals is stretched out from the sidewall of upper cover body (11) respectively, in the sidewall of described upper cover body (11), and it is positioned in described terminal group (13) part that four terminals stretch out and is provided with and is coated with the second Baltimore groove that epoxy resin carries out sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510116068.0A CN106032998A (en) | 2015-03-17 | 2015-03-17 | Sensor used for detecting automobile inlet manifold temperature and pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510116068.0A CN106032998A (en) | 2015-03-17 | 2015-03-17 | Sensor used for detecting automobile inlet manifold temperature and pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106032998A true CN106032998A (en) | 2016-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510116068.0A Pending CN106032998A (en) | 2015-03-17 | 2015-03-17 | Sensor used for detecting automobile inlet manifold temperature and pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106032998A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186494A (en) * | 2019-03-11 | 2019-08-30 | 浙江毅力汽车空调有限公司 | A kind of encapsulating structure of new-energy automotive air-conditioning temperature and pressure transmitter |
-
2015
- 2015-03-17 CN CN201510116068.0A patent/CN106032998A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186494A (en) * | 2019-03-11 | 2019-08-30 | 浙江毅力汽车空调有限公司 | A kind of encapsulating structure of new-energy automotive air-conditioning temperature and pressure transmitter |
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Application publication date: 20161019 |