CN214464470U - Engine oil pressure sensor with atmospheric pressure compensation - Google Patents
Engine oil pressure sensor with atmospheric pressure compensation Download PDFInfo
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- CN214464470U CN214464470U CN202023044621.XU CN202023044621U CN214464470U CN 214464470 U CN214464470 U CN 214464470U CN 202023044621 U CN202023044621 U CN 202023044621U CN 214464470 U CN214464470 U CN 214464470U
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- pressure sensor
- oil pressure
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- compensation
- engine oil
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Abstract
The utility model relates to an engine oil pressure sensor with atmospheric pressure compensation, which comprises a housin, be provided with oil pressure sensor and baroceptor in the casing, be equipped with the hydraulic fluid port that pierces through the casing lateral wall on the casing, oil pressure sensor is located the inboard of hydraulic fluid port, be provided with the sealing washer that is used for isolated outside engine oil and casing inner chamber between oil pressure sensor and the casing, oil pressure sensor and shells inner wall surround the circuit board chamber that forms and be used for installing control circuit board, still be equipped with the air vent that pierces through the casing lateral wall on the casing, baroceptor sets up on the inner wall of casing to baroceptor is located the one end of air vent. The utility model discloses an engine oil pressure sensor with atmospheric pressure compensation is not fragile, the commonality is high, the cost is lower.
Description
Technical Field
The utility model relates to a pressure sensor especially relates to an engine oil pressure sensor with atmospheric pressure compensation.
Background
The engine oil pressure sensor is a device for detecting the engine oil pressure of a vehicle, the existing engine oil pressure sensors mainly comprise two types, one type is a gauge pressure type engine oil pressure sensor, and a circuit board cavity of the engine oil pressure sensor has a breathing function and is communicated with the atmosphere. The oil pressure sensor has a disadvantage in that external rain water or humid air is easily sucked into the sensor, thereby causing damage to the sensor. The other is an absolute pressure type engine oil pressure sensor which seals a rear circuit board cavity, so that the problem of water inflow of the circuit board cavity is solved, and when the external atmospheric pressure changes, a sensor signal changes. Particularly, after the automobile is in an altitude, the atmosphere changes greatly due to the change of the altitude, so that signal distortion is caused, and the engine can be possibly caused to judge that the engine oil pressure is abnormal to give an alarm or limit the speed. In order to solve the above problem, the conventional solution is to use an intake pressure sensor signal on the engine as a reference and process it in the ECU, so that the operator must modify the control logic at the time of engine calibration. This is not applicable to engines that were originally calibrated using gage pressure. Meanwhile, the number of engine superchargers is increased, the pressure after supercharging is measured, the atmospheric pressure can not be collected, an atmospheric pressure sensor needs to be additionally arranged, and therefore the cost is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing an oil pressure sensor who has atmospheric pressure compensation that not fragile, commonality are high, with lower costs.
The utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, including the casing, be provided with oil pressure sensor and baroceptor in the casing, be equipped with the hydraulic fluid port that draws that pierces through the casing lateral wall on the casing, oil pressure sensor is located the inboard of drawing the hydraulic fluid port, is provided with the sealing washer that is used for isolated outside engine oil and casing inner chamber between oil pressure sensor and the casing, and oil pressure sensor and shells inner wall surround the circuit board chamber that forms and be used for installing control circuit board, still are equipped with the air vent that pierces through the casing lateral wall on the casing, baroceptor sets up on the inner wall of casing to baroceptor is located the one end of air vent.
Further, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, the casing includes the drain pan and is located the drain pan top and can dismantle the top cap of being connected with the drain pan.
Further, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, the bottom of drain pan is provided with the connector.
Further, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, draw the medial surface that the hydraulic fluid port extends to the drain pan from the bottom surface of connector.
Further, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, the top of drain pan is provided with the spacing ring, and the lateral surface of top cap is equipped with the flange that corresponds with the spacing ring.
Further, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, the top surface of top cap are equipped with connects the socket, connect to be equipped with in the socket and be connected with control circuit board.
Further, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, oil pressure sensor is ceramic pressure sensor, air pressure sensor is diffusion silicon pressure sensor.
Further, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, the drain pan is made by metal material.
Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage: the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, be provided with the oil pressure sensor who is used for the sensing oil pressure in its casing and be used for the atmospheric pressure's of sensing atmospheric pressure baroceptor, thereby realized the measurement to atmospheric pressure and engine oil pressure, in order to acquire actual engine oil pressure, the atmospheric pressure data that sets up the oil pressure that control circuit board in the casing acquireed oil pressure sensor and baroceptor and acquire to oil pressure that oil pressure sensor acquireed is further handled most, thereby reject the influence of atmospheric pressure data in the oil pressure data, finally obtain actual engine oil pressure data. Compared with the existing engine oil pressure sensor, the engine oil pressure sensor does not need an external air pressure sensing device, and meanwhile, the air pressure data and the oil pressure data do not need to be uploaded to a vehicle-mounted computer for post-processing, so that the actual engine oil pressure data can be directly obtained, the universality is improved, the processing procedure of the vehicle-mounted computer is simplified, and the cost is reduced.
To sum up, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation is not fragile, the commonality is high, the cost is lower.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
FIG. 1 is a cross-sectional view of an oil pressure sensor with atmospheric pressure compensation;
FIG. 2 is a cross-sectional view of the bottom shell;
FIG. 3 is a cross-sectional view of the top cover;
fig. 4 is a circuit schematic of the control circuit board.
In the figure, a shell 1, an oil pressure sensor 2, an air pressure sensor 3, an oil lead port 4, a sealing ring 5, a circuit board cavity 6, an air vent 7, a bottom shell 9, a top cover 10, a connector 11, a limiting ring 12, a flange 13, a socket 14 and a metal connecting column 15.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, the utility model relates to an engine oil pressure sensor with atmospheric pressure compensation of preferred embodiment, including casing 1, be provided with oil pressure sensor 2 and baroceptor 3 in the casing, be equipped with the oil mouth 4 that draws that pierces through the casing lateral wall on the casing, oil pressure sensor is located the inboard of drawing the oil mouth, be provided with the sealing washer 5 that is used for isolated outside engine oil and casing inner chamber between oil pressure sensor and the casing, oil pressure sensor and shells inner wall surround and form the circuit board chamber 6 that is used for installing control circuit board, still be equipped with the air vent 7 that pierces through the casing lateral wall on the casing, baroceptor sets up on the inner wall of casing, and baroceptor is located the one end of air vent.
The utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, be provided with the oil pressure sensor who is used for the sensing oil pressure in its casing and be used for the atmospheric pressure's of sensing atmospheric pressure baroceptor, thereby realized the measurement to atmospheric pressure and engine oil pressure, in order to acquire actual engine oil pressure, the atmospheric pressure data that sets up the oil pressure that control circuit board in the casing acquireed oil pressure sensor and baroceptor and acquire to oil pressure that oil pressure sensor acquireed is further handled most, thereby reject the influence of atmospheric pressure data in the oil pressure data, finally obtain actual engine oil pressure data. Compared with the existing engine oil pressure sensor, the engine oil pressure sensor does not need an external air pressure sensing device, and meanwhile, the air pressure data and the oil pressure data do not need to be uploaded to a vehicle-mounted computer for post-processing, so that the actual engine oil pressure data can be directly obtained, the universality is improved, the processing procedure of the vehicle-mounted computer is simplified, and the cost is reduced.
The air pressure data sensed by the air pressure sensor is used for pressure compensation, so that ECU software compensation is omitted, the ECU can be used after being directly read, software design of the ECU is facilitated, and the calibrated machine type can be conveniently switched, so that purchase cost of a user is reduced, and maintainability of the device and system reliability are improved.
In addition, set up in the port that atmospheric pressure sensor of air vent tip can cover the air vent completely to it is isolated with outside atmosphere with the circuit board chamber, thereby prevents that the moisture in the outside atmosphere from getting into the circuit board intracavity and causing the influence to control circuit board.
The specific principle of the method is shown in fig. 2, wherein a device BR1 is an air pressure sensor, a device BR2 is an oil pressure sensor, a device U1 is a signal conditioning chip, a chip U1 collects voltage signals of two paths of pressure sensors and conditions the voltage signals, and then the voltage conditioned by the device BR2 is subtracted from the voltage conditioned by the device BR1, so that the compensated actual oil pressure is obtained. The operator can flexibly choose to output the actual oil pressure in an analog signal or through the SENT protocol by programming the U1 chip. The filter circuit of the BR1 sensor is composed of two capacitors C4 and C6, the filter circuit of the BR2 sensor is composed of two capacitors C5 and C7, the filter circuit of the BR2 sensor is composed of two devices R1 and C1, and the EMC electromagnetic compatibility of the whole circuit can be improved by the two devices TV2 and TV 1. The devices BR1, BR2, and U1 are commercially available devices, and the internal circuit structures thereof are not described in detail.
Preferably, the utility model discloses an oil pressure sensor with atmospheric pressure compensation, casing include drain pan 9 and be located the drain pan top and can dismantle the top cap 10 of being connected with the drain pan.
Preferably, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, the bottom of drain pan is provided with connector 11.
The arrangement of the connector facilitates the installation of the oil filling pressure sensor. During specific implementation, the outer side surface of the connector is provided with external threads.
Preferably, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation draws the medial surface that the hydraulic fluid port extends to the drain pan from the bottom surface of connector.
This design has realized getting into the purpose in the casing with machine oil, and concrete during operation, machine oil gets into from the bottom of drawing the hydraulic fluid port and draws the hydraulic fluid port and transmit to the casing along drawing the hydraulic fluid port in, fills up until it with the space between oil pressure sensor and the drain pan to make oil pressure sensor can carry out the sensing to machine oil pressure.
Preferably, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, the top of drain pan is provided with spacing ring 12, and the lateral surface of top cap is equipped with the flange 13 that corresponds with the spacing ring.
This design has realized being connected of drain pan and top cap. During specific work, because the lateral wall of drain pan has certain elasticity, operating personnel can insert the bottom of top cap in the drain pan until the flange of its side crosses the spacing ring to realize being connected of drain pan and top cap, at this moment, the bottom of top cap just in time compresses tightly baroceptor on the drain pan. In addition, also can be through presetting top cap bottom in the drain pan, realize being connected of drain pan and top cap through compression fittings at the mode that the drain pan top formed the spacing ring again.
Preferably, the top surface of the top cover of the engine oil pressure sensor with atmospheric pressure compensation of the present invention is provided with a socket 14, and the socket is internally provided with a control circuit board.
The design realizes the connection of the engine oil pressure sensor and the vehicle-mounted computer, specifically, the socket is connected with the vehicle-mounted computer through a connecting wire with a corresponding plug, and when the connection is carried out, the metal electrode at the end part of the connecting wire is connected with the control circuit board in the cavity of the circuit board through a metal connecting column in the socket. The control circuit board is directly connected with the metal connecting column through a lead.
Preferably, the utility model discloses an engine oil pressure sensor with atmospheric pressure compensation, oil pressure sensor are ceramic pressure sensor, and pressure sensor is diffusion silicon pressure sensor.
The volume of the diffused silicon pressure sensor is small, so that the whole volume of the engine oil pressure sensor can be reduced by using the diffused silicon pressure sensor as the air pressure sensor.
Preferably, the oil pressure sensor with atmospheric pressure compensation of the present invention has a bottom shell made of a metal material.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that the invention can be implemented in other specific forms by a person skilled in the art without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description.
Furthermore, the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention. Also, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. An oil pressure sensor with atmospheric pressure compensation, characterized by: including casing (1), be provided with oil pressure sensor (2) and baroceptor (3) in the casing, be equipped with on the casing and pierce through the hydraulic fluid port (4) that draws of casing lateral wall, oil pressure sensor is located the inboard of drawing the hydraulic fluid port, is provided with between oil pressure sensor and the casing and is used for isolated outside machine oil and sealing washer (5) of casing inner chamber, and oil pressure sensor and shells inner wall surround and form circuit board chamber (6) that are used for installing control circuit board, still are equipped with on the casing and pierce through air vent (7) of casing lateral wall, baroceptor sets up on the inner wall of casing to baroceptor is located the one end of air vent.
2. The oil pressure sensor with barometric pressure compensation of claim 1, wherein: the shell comprises a bottom shell (9) and a top cover (10) which is positioned above the bottom shell and is detachably connected with the bottom shell.
3. The oil pressure sensor with barometric pressure compensation of claim 2, wherein: the bottom end of the bottom shell is provided with a connector (11).
4. The oil pressure sensor with barometric pressure compensation of claim 3, wherein: the oil guide port extends to the inner side face of the bottom shell from the bottom face of the connector.
5. The oil pressure sensor with barometric pressure compensation of claim 4, wherein: the top end of the bottom shell is provided with a limiting ring (12), and the outer side surface of the top cover is provided with a flange (13) corresponding to the limiting ring.
6. The oil pressure sensor with barometric pressure compensation of claim 5, wherein: the top surface of the top cover is provided with a socket (14), and the socket is internally provided with a control circuit board.
7. The oil pressure sensor with barometric pressure compensation of claim 6, wherein: the oil pressure sensor is a ceramic pressure sensor, and the air pressure sensor is a diffused silicon pressure sensor.
8. The oil pressure sensor with barometric pressure compensation of claim 6, wherein: the bottom case is made of a metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023044621.XU CN214464470U (en) | 2020-12-16 | 2020-12-16 | Engine oil pressure sensor with atmospheric pressure compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023044621.XU CN214464470U (en) | 2020-12-16 | 2020-12-16 | Engine oil pressure sensor with atmospheric pressure compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214464470U true CN214464470U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023044621.XU Active CN214464470U (en) | 2020-12-16 | 2020-12-16 | Engine oil pressure sensor with atmospheric pressure compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214464470U (en) |
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2020
- 2020-12-16 CN CN202023044621.XU patent/CN214464470U/en active Active
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