CN212963761U - Engine coolant temperature sensing device - Google Patents
Engine coolant temperature sensing device Download PDFInfo
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- CN212963761U CN212963761U CN202021733795.4U CN202021733795U CN212963761U CN 212963761 U CN212963761 U CN 212963761U CN 202021733795 U CN202021733795 U CN 202021733795U CN 212963761 U CN212963761 U CN 212963761U
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- groove
- thermistor
- metal head
- engine coolant
- temperature sensing
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Abstract
The utility model relates to an engine coolant temperature sensing device, which comprises a bracket, a contact pin, a sealing element, a thermistor, a metal head and heat conducting grease, wherein an accommodating groove is arranged in the metal head, and the connecting part is clamped with the metal head; a connecting groove is formed in the connecting part, and the contact pin is positioned in the connecting groove; the sealing element is sleeved at one end of the connecting part which is clamped with the metal head and is positioned between the connecting part and the metal head; the thermistor is positioned in the accommodating groove, is connected with the inserting part and is electrically connected with the contact pin; the heat conducting grease is located at the bottom of the accommodating groove and wraps the inserting part and the thermistor at the same time. The utility model provides an engine coolant temperature sensing device passes through the joint of support and metal head, utilizes heat conduction fat parcel thermistor and support simultaneously to increase engine coolant temperature sensing device's leakproofness, improve temperature measurement's sensitivity.
Description
Technical Field
The utility model relates to an automotive sensor technical field especially relates to an engine coolant temperature sensing device.
Background
The engine coolant temperature sensor is used for monitoring the temperature rise or the temperature decrease of the automobile engine coolant in real time, so that an Electronic Control Unit (ECU) corrects the fuel injection time and the ignition time of the engine according to the received coolant temperature information. A metal head of a traditional engine coolant temperature sensor is in contact with coolant, a thermistor with a negative temperature coefficient is arranged in the metal head, and the metal head is connected with a support through an injection molding process. In the using process, the sealing performance is poor due to the injection molding process problem, and the injection molding glue damages the thermistor, so that the response time of the engine coolant temperature sensor is long, and the sensitivity is low.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an engine coolant temperature sensing device solves current sensor because injection molding process leads to, the bad problem of leakproofness.
In order to achieve the above object, the present invention provides an engine coolant temperature sensing device, which includes a bracket, a pin, a sealing member, a thermistor, a metal head, and a thermal grease, wherein the metal head has a receiving groove therein, the bracket includes a connecting portion and an inserting portion, the connecting portion and the inserting portion are integrally formed, the connecting portion is connected to the metal head in a snap-fit manner, and the inserting portion is located in the receiving groove; the connecting part is internally provided with a connecting groove, the connecting groove penetrates through the connecting part, the contact pin is positioned in the connecting groove, is exposed out of one end of the connecting part close to the inserting part through the connecting groove and is connected with the inner wall of the connecting groove; the sealing element is sleeved at one end of the connecting part which is clamped with the metal head and is positioned between the connecting part and the metal head; the thermistor is positioned in the accommodating groove, is connected with the inserting part and is electrically connected with the contact pin; the heat conducting grease is located at the bottom of the accommodating groove and wraps the inserting part and the thermistor at the same time.
Compared with the prior art, the utility model provides an engine coolant temperature sensing device has following beneficial effect:
through support and metal head lock, and set up the sealing washer in lock department, then utilize the connection structure of heat conduction fat parcel thermistor in the metal head and grafting portion for engine coolant temperature sensing device's leakproofness is good, thereby reduces at the in-process of measuring temperature, because the leakproofness is not good leads to the temperature to run off, thereby influences the low condition of measurement sensitivity.
The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Drawings
Fig. 1 is a schematic structural diagram of an engine coolant temperature sensing device according to a first embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an engine coolant temperature sensing device;
FIG. 3 is a schematic structural view of the stent of FIG. 1;
FIG. 4 is a schematic cross-sectional view of the stent of FIG. 3;
FIG. 5 is a schematic mechanical view of the metal head of FIG. 1;
FIG. 6 is a cross-sectional view showing the positional relationship among the pins, the thermistor, the metal head and the thermal grease;
description of reference numerals: 10. an engine coolant temperature sensing device; 20. a support; 30. inserting a pin; 40. A seal member; 50. a thermistor; 60. a metal head; 70. a heat conductive grease; 21. a connecting portion; 22. a plug-in part; 211. connecting grooves; 212. an outer connecting hole; 221. a placement groove; 222. a clamping groove; 61. accommodating grooves; 51. And a conductive pin.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-6, the present invention provides an engine coolant temperature sensing device 10, which includes a bracket 20, a pin 30, a sealing element 40, a thermistor 50, a metal head 60 and a thermal grease 70, the bracket 20 and the metal head 60, the pin 30 is located inside the bracket 20, the sealing element 40 is located between the bracket and the metal head 60, the thermistor 50 is electrically connected to the pin 30, the thermal grease 70 is located inside the metal head 60, and the thermal grease 70 is wrapped around one end of the bracket 20 located on the metal head 60 and the thermistor 50. The metal head 60 is in direct contact with the coolant of the engine, and transmits the temperature to the thermistor 50 through the thermal grease 70, and the thermistor 50 receives the temperature and transmits the temperature to an Electronic Control Unit (ECU) through the contact pin 30, so that the correction of the fuel injection and ignition time of the engine is controlled by using the acquired temperature.
It is understood that the pins 30 are made of a conductive metal material.
It can be understood that an ecu (electronic Control unit), also called a vehicle computer, a vehicle-mounted computer, etc., is composed of a Microprocessor (MCU), a memory (ROM, RAM), an input/output interface (I/O), a digital converter (a/D), and a large-scale integrated circuit for shaping and driving, as in a common computer.
It is understood that in the present embodiment, the material of the metal head 60 is copper, and in some embodiments, the metal head 60 may be made of other materials as long as the metal head has thermal conductivity.
Specifically, holding tank 61 has been seted up in metal head 60, and support 20 includes connecting portion 21 and grafting portion 22, connecting portion 21 and grafting portion 22 integrated into one piece, connecting portion 21 and metal head 60 joint, and grafting portion 22 is located holding tank 61, and has seted up spread groove 211 in connecting portion 21, and spread groove 211 runs through connecting portion 21, and contact pin 30 is located spread groove 211, exposes in one side that connecting portion 21 is close to grafting portion 22 through spread groove 211 to with the inner wall connection of spread groove 211.
The thermistor 50 is located in the accommodating groove 61, connected with the insertion part 22 and electrically connected with the pin 30, the thermal grease 70 is located at the bottom of the accommodating groove 61 and simultaneously wrapped on one end of the insertion part 22 close to the bottom of the accommodating groove 61 and the thermistor 50, so that when the metal head 60 contacts the cooling liquid, the temperature is transmitted to the thermistor 50 through the thermal grease 70, the thermistor 50 converts the temperature into an electric signal and then transmits the electric signal to the electronic control unit through the pin 30, and the electronic control unit controls the time correction of oil injection and ignition of the engine.
It is understood that the heat conductive grease 70, also known as heat dissipating silicone grease, heat dissipating paste, heat dissipating oil, etc., may be composed of zinc oxide, aluminum oxide, boron nitride, silicon carbide, etc., and is characterized by a stable characteristic of not becoming thick at low temperature and not being diluted at high temperature.
Further, the sealing member 40 is a rubber sealing ring, and the sealing member 40 is sleeved between the connecting portion 21 and the metal head 60, so that the sealing performance of the engine coolant temperature sensing device 10 can be improved, the temperature loss is reduced, and the accuracy of temperature measurement is improved.
Further, a conductive pin 51 is connected to the thermistor 50, and the conductive pin 51 is connected to the pin 30, so as to electrically connect the thermistor 50 and the pin 30.
Further, an outer connection hole 212 is further formed in the connection portion 21, the outer connection hole 212 is disposed at one end of the connection portion 21 far away from the insertion portion 22 and is communicated with the connection groove 211, and one end of the pin 30 extends from the connection groove 211 to the inner side of the outer connection hole 212. The electronic control unit is electrically connected to the contact pin 30 through an external hole to receive the temperature electric signal converted by the thermistor 50.
Furthermore, a placing groove 221 is formed in one end of the inserting portion 22 away from the connecting portion 21, the thermistor 50 is located in the placing groove 221, and the placing groove 221 and the thermistor 50 are simultaneously wrapped by the thermal grease 70.
Further, the receiving groove 61 is a stepped groove, and the heat conductive grease 70 is in contact with the inner wall of the receiving groove 61.
Further, one end of the connecting portion 21, which is clamped with the metal head 60, is provided with a clamping groove 222, and the sealing element 40 is sleeved on the clamping groove 222 to prevent the sealing element 40 from displacing on the connecting portion 21.
The utility model discloses a theory of operation does: when the temperature of the engine coolant needs to be measured, the metal head 60 is directly contacted with the coolant, the metal head 60 transmits the temperature of the coolant to the thermistor 50 through the thermal grease 70, the thermistor 50 converts the temperature into an electric signal and transmits the electric signal to the electronic control unit through the contact pin 30, and the electronic control unit controls the injection and ignition time correction of the engine by using the received temperature.
Compared with the prior art, the utility model provides an engine coolant temperature sensing device has following beneficial effect:
through support and metal head lock, and set up the sealing washer in lock department, then utilize the connection structure of heat conduction fat parcel thermistor in the metal head and grafting portion for engine coolant temperature sensing device's leakproofness is good, thereby reduces at the in-process of measuring temperature, because the leakproofness is not good leads to the temperature to run off, thereby influences the low condition of measurement sensitivity.
The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. An engine coolant temperature sensing apparatus characterized in that: comprises that
The metal head is internally provided with an accommodating groove, the support comprises a connecting part and an inserting part, the connecting part and the inserting part are integrally formed, the connecting part is clamped with the metal head, and the inserting part is positioned in the accommodating groove;
the connecting part is internally provided with a connecting groove, the connecting groove penetrates through the connecting part, the contact pin is positioned in the connecting groove, is exposed out of one end of the connecting part close to the inserting part through the connecting groove and is connected with the inner wall of the connecting groove;
the sealing element is sleeved at one end of the connecting part which is clamped with the metal head and is positioned between the connecting part and the metal head;
the thermistor is positioned in the accommodating groove, is connected with the inserting part and is electrically connected with the contact pin; the heat conducting grease is located at the bottom of the accommodating groove and wraps the inserting part and the thermistor at the same time.
2. An engine coolant temperature sensing apparatus as defined in claim 1, wherein:
and the thermistor is connected with a conductive pin, and the conductive pin is connected with the contact pin so as to realize the electric connection of the thermistor and the contact pin.
3. An engine coolant temperature sensing apparatus as defined in claim 1, wherein:
the plug part is far away from one end of the connecting part is provided with a placing groove, the thermistor is located in the placing groove, and the heat conducting grease is wrapped in the placing groove and the thermistor at the same time.
4. An engine coolant temperature sensing apparatus as defined in claim 1, wherein:
the holding tank is the ladder groove, heat conduction fat with the contact of holding tank inner wall.
5. An engine coolant temperature sensing apparatus as defined in claim 1, wherein:
the connecting part is further provided with an external connection hole, the external connection hole is formed in one end, far away from the inserting part, of the connecting part, the connecting groove is communicated with the external connection hole, and one end of the contact pin extends into the external connection hole from the connecting groove.
6. An engine coolant temperature sensing apparatus as defined in claim 1, wherein:
the connecting portion with one of metal head joint is served and is seted up the joint groove, the sealing member cover is located on the joint groove.
7. An engine coolant temperature sensing apparatus as defined in claim 1, wherein:
the sealing element is a rubber sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021733795.4U CN212963761U (en) | 2020-08-19 | 2020-08-19 | Engine coolant temperature sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021733795.4U CN212963761U (en) | 2020-08-19 | 2020-08-19 | Engine coolant temperature sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212963761U true CN212963761U (en) | 2021-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021733795.4U Active CN212963761U (en) | 2020-08-19 | 2020-08-19 | Engine coolant temperature sensing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212963761U (en) |
-
2020
- 2020-08-19 CN CN202021733795.4U patent/CN212963761U/en active Active
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