CN100338442C - Oil box level sensor for vehicle - Google Patents
Oil box level sensor for vehicle Download PDFInfo
- Publication number
- CN100338442C CN100338442C CNB2005100390501A CN200510039050A CN100338442C CN 100338442 C CN100338442 C CN 100338442C CN B2005100390501 A CNB2005100390501 A CN B2005100390501A CN 200510039050 A CN200510039050 A CN 200510039050A CN 100338442 C CN100338442 C CN 100338442C
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- stainless
- steel tube
- magnetic float
- sensor
- millimeter
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- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 26
- 239000010935 stainless steel Substances 0.000 claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 3
- 235000014676 Phragmites communis Nutrition 0.000 claims description 10
- 239000002775 capsule Substances 0.000 claims description 10
- 230000013011 mating Effects 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 22
- 239000000295 fuel oil Substances 0.000 abstract description 9
- 230000032683 aging Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
The present invention relates to an oil level sensor of a fuel oil tank for vehicles. The present invention solves the problems that a varistor and a resistance changing contact point of the existing sensor are easy to age, corrode and lose efficacy when soaked in fuel oil, and the sensor of the fuel oil tank has high failure rate. The present invention comprises a wire connecting mechanism, a stainless steel pipe, a magnetic float and a sensing circuit board. The present invention is characterized in that the cross section of the stainless steel pipe, which is matched with the columnar magnetic float, is an elliptical cross section. Components of the sensor of the present invention do not contact the fuel oil, and therefore, the present invention has the advantages of avoiding the aging and the abrasion of a traditional slide-wire resistance changing type sensor, providing superior operating performance and enhancing the stability and the reliability of the sensor.
Description
Technical field
The present invention relates to the fuel tank for automobile oil level measuring device.
Background technology
Oil box level sensor for vehicle mainly is for the driver provides fuel tank oil mass information, so that the in good time fuel up of driver prevents to cause vehicle stagnation of movement midway because of fuel oil exhausts.Oil box level sensor for vehicle generally adopts the structure of slip rheostat and thickness resistance-type at present.Its principle is that float fluctuates with oil mass in fuel tank, drives the float lever contact and changes the rheochord resistance value, measures fuel level in tank by resistance.Because the contact frequently slides, occur short circuit easily, open circuit, faults such as loose contact and mechanical wear.Simultaneously, this structure is that direct circuit board with sensor is immersed in the fuel oil, is easy to aging corrosion failure.According to investigations, a lot of auto producers reflect this tank sensor failure rate height, have influence on the reputation of product and the sale of product, and an urgent demand solves this technical barrier.
Summary of the invention
The objective of the invention is: a kind of sensor is provided, circuit board element and switch contact directly are not immersed in the oil, sensor output signal is stable, accurately, oil box level sensor for vehicle that functional reliability is high.
The technical solution that realizes the object of the invention is as follows:
Oil box level sensor for vehicle comprises wiring mechanism, stainless-steel tube, magnetic float and sensing circuit plate; Column magnetic float is set on the stainless-steel tube, and the sensing circuit plate is positioned at stainless-steel tube, and its sensing circuit is by three above resistance and three reed capsule on-off circuits that above reed capsule is formed; It is characterized in that:
The xsect that described stainless-steel tube cooperates with column magnetic float is an elliptic cross-section.
Oil box level sensor for vehicle according to above-mentioned is characterized in that: the long axis length of the elliptic cross-section that stainless-steel tube cooperates with column magnetic float is the 11.9-12.1 millimeter, and minor axis length is the 8.3-8.7 millimeter, and its tolerance clearance is the 0.5-2 millimeter.
According to above-mentioned oil box level sensor for vehicle, it is characterized in that: the material of main part of described column magnetic float is a nitrile rubber, its outside surface is cylindric, the middle part is a slotted eye with the mating holes of stainless-steel tube, is embedded with bar permanent magnet along column magnetic float cylinder axis respectively to, oval mating holes long axis direction both sides; The bar permanent magnet cross-sectional area is the 14-18 square millimeter.
Oil box level sensor for vehicle according to above-mentioned is characterized in that: spacing is the 28-32 millimeter between described reed capsule pin.
Useful technique effect of the present invention is embodied in two aspects:
1, sensor application magnetic induction principle of the present invention and switch resistance array measurement oil level.The sensor components and parts do not contact fuel oil, have avoided the aging and wearing and tearing of traditional slip rheostat sensor.Stable and reliable working performance.
2, the full oil level resistance of usually oil level sensor is 180 Ω, 25 calibration of precision.To 380 liters, the fuel tank that 640mm is high, the corresponding 25.6mm oil level of per minute degree height, 15.2 liters of fuel oils.The stainless-steel tube in pipe cross section is because the rotation of float has the drift of a calibration.May make the pointer of moving-magnetic type fuel gauge that shake is arranged on the one hand, 15.2 liters of fuel oil index errors are arranged on the other hand.The stainless steel pipe of the utility model elliptic cross-section cooperates with the float of oval endoporus, can limit relatively rotating between the two, has avoided the inhomogeneous calibration drift that brings in magnetic field, causes exporting unsettled error.Improved the reliability of sensor.The float of outer cross section circle, the stainless steel pipe of elliptic cross-section also have a resistance in liquid little, anti abrasive characteristics.
Description of drawings
Fig. 1 is this utility structure synoptic diagram,
Fig. 2 is a stainless-steel tube inner structure synoptic diagram,
Fig. 3 is a magnetic float cross sectional representation.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described by embodiment.
Embodiment 1:
This fuel level in tank sensor surface structure is seen Fig. 1, by junction block 1, connects iron plate 9, sealing rubber pad 10, and clamp nut 11, stainless-steel tube 2, magnetic float 8, seal plug 7 and sensing circuit plate 4 are formed.
The long axis length of the elliptic cross-section that stainless-steel tube 2 cooperates with column magnetic float 8 is the 11.9-12.1 millimeter, and minor axis length is the 8.3-8.7 millimeter, and its tolerance clearance is the 0.5-2 millimeter.
The material of main part of column magnetic float 8 is a nitrile rubber, and its outside surface is cylindric, and the mating holes of middle part and stainless-steel tube 2 is a slotted eye, is embedded with bar permanent magnet 13 along column magnetic float cylinder axis respectively to, oval mating holes long axis direction both sides; Bar permanent magnet 13 xsects are square, and area is the 14-18 square millimeter.
During use, this device is vertically mounted in the fuel tank, column magnetic float 8 fluctuates with oil level.
Its principle of work is: when magnetic float outside being enclosed within stainless-steel tube 28 fluctuates with oil level, the action of a magnetic field that embeds the float internal magnet is in the reed capsule on-off circuit, changed the circuit output resistance, so just set up the one-to-one relationship of oil level and output resistance, change thereby realize measuring fuel level in tank, oil meter can reflect oil level whereby.Adopting the stainless-steel tube 2 of oval cross section is that oval-shaped nitrile rubber float 8 cooperates with the magnet endoporus is housed, and purpose is to make float axial angle of rotation in the process of fluctuating very little, and is reliable and stable to guarantee sensor output signal.
Claims (3)
1, oil box level sensor for vehicle comprises wiring mechanism, stainless-steel tube, magnetic float and sensing circuit plate; Column magnetic float is set on the stainless-steel tube, and the sensing circuit plate is positioned at stainless-steel tube, and its sensing circuit is by three above resistance and three reed capsule on-off circuits that above reed capsule is formed; It is characterized in that:
The xsect that described stainless-steel tube cooperates with column magnetic float is an elliptic cross-section;
The material of main part of described column magnetic float is a nitrile rubber, and its outside surface is cylindric, and the mating holes of middle part and stainless-steel tube is a slotted eye, is embedded with bar permanent magnet along column magnetic float cylinder axis respectively to, oval mating holes long axis direction both sides; The bar permanent magnet cross-sectional area is the 14-18 square millimeter.
2, oil box level sensor for vehicle according to claim 1, it is characterized in that: the long axis length of the elliptic cross-section that stainless-steel tube cooperates with column magnetic float is the 11.9-12.1 millimeter, minor axis length is the 8.3-8.7 millimeter, and its tolerance clearance is the 0.5-2 millimeter.
3, oil box level sensor for vehicle according to claim 1 is characterized in that: spacing is the 28-32 millimeter between described reed capsule pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100390501A CN100338442C (en) | 2005-04-22 | 2005-04-22 | Oil box level sensor for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100390501A CN100338442C (en) | 2005-04-22 | 2005-04-22 | Oil box level sensor for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1749708A CN1749708A (en) | 2006-03-22 |
| CN100338442C true CN100338442C (en) | 2007-09-19 |
Family
ID=36605284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100390501A Active CN100338442C (en) | 2005-04-22 | 2005-04-22 | Oil box level sensor for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100338442C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759790A (en) * | 2013-12-24 | 2014-04-30 | 合肥邦立电子股份有限公司 | Oscillating bar type liquid level sensor |
| CN109724669B (en) * | 2019-01-24 | 2021-06-08 | 广西桂仪科技有限公司 | Automobile oil level sensor and preparation process thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2061275U (en) * | 1990-03-06 | 1990-08-29 | 航空航天工业部第三○三研究所 | Inductance type float tank gage |
| US4955231A (en) * | 1989-05-12 | 1990-09-11 | General Motors Corporation | Liquid float gage assembly |
| CN2074012U (en) * | 1990-06-06 | 1991-03-27 | 李锋海 | Liquid level sensor of automobile liquefied gas tank |
| US5483831A (en) * | 1993-11-09 | 1996-01-16 | Steiner; George A. | Direct liquid level reading device |
| JPH0886684A (en) * | 1994-09-16 | 1996-04-02 | Sanyo Electric Co Ltd | Level sensor |
| WO2003044470A1 (en) * | 2001-11-19 | 2003-05-30 | Autosensor As | Device for level detecting |
| CN2599541Y (en) * | 2003-02-20 | 2004-01-14 | 新疆特变电工股份有限公司 | Tubular magnetic float oil level meter |
| CN2788153Y (en) * | 2005-04-22 | 2006-06-14 | 合肥邦立电子有限公司 | Vehicle-used fuel tank fuel level sensor |
-
2005
- 2005-04-22 CN CNB2005100390501A patent/CN100338442C/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4955231A (en) * | 1989-05-12 | 1990-09-11 | General Motors Corporation | Liquid float gage assembly |
| CN2061275U (en) * | 1990-03-06 | 1990-08-29 | 航空航天工业部第三○三研究所 | Inductance type float tank gage |
| CN2074012U (en) * | 1990-06-06 | 1991-03-27 | 李锋海 | Liquid level sensor of automobile liquefied gas tank |
| US5483831A (en) * | 1993-11-09 | 1996-01-16 | Steiner; George A. | Direct liquid level reading device |
| JPH0886684A (en) * | 1994-09-16 | 1996-04-02 | Sanyo Electric Co Ltd | Level sensor |
| WO2003044470A1 (en) * | 2001-11-19 | 2003-05-30 | Autosensor As | Device for level detecting |
| CN2599541Y (en) * | 2003-02-20 | 2004-01-14 | 新疆特变电工股份有限公司 | Tubular magnetic float oil level meter |
| CN2788153Y (en) * | 2005-04-22 | 2006-06-14 | 合肥邦立电子有限公司 | Vehicle-used fuel tank fuel level sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1749708A (en) | 2006-03-22 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HEFEI BANGLI ELECTRONIC CO., LTD. Free format text: FORMER OWNER: BANGLI ELECTRONIC CO., LTD., HEFEI Effective date: 20110506 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 230088 3/F, KEDA INNOVATION INDUSTRIAL PARK, TIANZHI ROAD, HIGH-TECH. ZONE, HEFEI CITY, ANHUI PROVINCE TO: 231202 NO. 3, XIANGPU ROAD, BOYAN SCIENCE AND TECHNOLOGY PARK, HIGH-TECH. DEVELOPMENT AREA, HEFEI CITY, ANHUI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110506 Address after: 231202, No. 3 Pu Pu Road, Bai Yan Science Park, hi tech Development Zone, Anhui, Hefei Patentee after: Hefei Bangli Electronic Co., Ltd. Address before: 230088 Anhui city of Hefei province high tech Zone Innovation Industrial Park on the third day of Science Patentee before: Hefei Bangli Electronic Co., Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Oil box level sensor for vehicle Effective date of registration: 20120614 Granted publication date: 20070919 Pledgee: Hefei hi tech credit Company limited by guarantee Pledgor: Hefei Bangli Electronic Co., Ltd. Registration number: 2012990000298 |
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| CP02 | Change in the address of a patent holder |
Address after: 230000 No.3, Xiangpu Road, Taohua Town, Feixi County, Hefei City, Anhui Province Patentee after: HEFEI BANGLI ELECTRONIC Co.,Ltd. Address before: 231202 No. 3, Xiangpu Road, Baiyan Science Park, high tech Development Zone, Hefei, Anhui Patentee before: HEFEI BANGLI ELECTRONIC Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |