CN202836587U - Camshaft position sensor with temperature compensation for motor - Google Patents
Camshaft position sensor with temperature compensation for motor Download PDFInfo
- Publication number
- CN202836587U CN202836587U CN 201220519686 CN201220519686U CN202836587U CN 202836587 U CN202836587 U CN 202836587U CN 201220519686 CN201220519686 CN 201220519686 CN 201220519686 U CN201220519686 U CN 201220519686U CN 202836587 U CN202836587 U CN 202836587U
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- magnet
- temperature compensation
- hall chip
- magnetic
- motor
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- Expired - Fee Related
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- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The utility model discloses a camshaft position sensor with a temperature compensation for a motor. The camshaft position sensor with the temperature compensation for the motor comprises a shell. A signal output end, a managing circuit board, a magnet and a Hall chip are respectively arranged on the shell. The camshaft position sensor with the temperature compensation for the motor is characterized in that a magnetic temperature compensation cover is arranged between the magnet and the Hall chip. A magnet cavity opened upward is arranged on the magnetic temperature compensation cover. An N pole of a cylindrical magnet extends downward into the magnet cavity and is closely knotted in the magnet cavity. The Hall chip appresses the lower bottom surface of the magnetic temperature compensation cover. The magnet, the magnetic temperature compensation cover and the Hall chip are fixed together. By operating temperature compensation to magnetic field inside the sensor, measuring error cause by change of temperature can be lowered, and consequently accuracy of the sensor can be improved, and electronic control unit (ECU) can get more accurate camshaft position signals at different temperature. The camshaft position sensor with the temperature compensation for the motor has the advantages of being simple in structure, improving combustion efficiency of the motor, and reducing fuel consumption and hazardous substance emissions.
Description
Technical field
The utility model relates to the automotive engine control parts, especially relates to a kind of CMPS Camshaft Position Sensor with temperature compensation for motor car engine.
Background technology
The function of the CMPS Camshaft Position Sensor of using on the engine (Camshaft Position Sensor) is the position signalling that gathers distribution cam axle, and input ECU, so that ECU identification cylinder compression top center, thereby carrying out order oil spout control, time of ignition control and detonation control, is the master control sensor of engine control.Can identify for the first time time of ignition when in addition, camshaft-position signal also is used for engine start.
At present, the Hall camshaft position sensor that generally uses on the engine is mainly by Hall chip, magnet, shell forms, Hall chip is close to magnet surface, shell is fixed on the outer cover of engine, Hall chip faces the signal gear that is installed on the camshaft, during use, signal gear is along with the rotation of camshaft, the scarce CMPS Camshaft Position Sensor that alternately turns over of double wedge and tooth, change thus with the magnetic circuit between the magnet, thereby cause the variation by the magnetic field intensity of Hall chip, Hall chip converts alternately changing of magnetic field intensity to electric signal output, during practical application, when changing intensity Φ b by Hall chip actual magnetic field strength Φ greater than chip output, the sensor output low level, on the contrary then opposite.
Because magnet is temperature sensor, decay can appear along with the rising of temperature in its magnetic, so the camshaft-position signal that CMPS Camshaft Position Sensor provides deviation to some extent when normal temperature and during high temperature, we can see from CMPS Camshaft Position Sensor work schedule accompanying drawing, when raising, temperature causes that magnetic field intensity weakens, be that Φ 1max is when changing to Φ 2max, the delay of Δ T obviously appears in the time of output level conversion, the delay meeting of Δ T directly affects the optimal combustion state of engine, increases energy consumption and discharge of poisonous waste.
Summary of the invention
The purpose of this utility model has been to provide a kind of Cam shaft for engine position transducer with temperature compensation, it carries out temperature compensation by the magnetic field to sensor internal, to improve stable magnetic field, thereby reach the purpose that improves sensor accuracy, so that ECU can obtain accurately camshaft-position signal under different temperatures.
The purpose of this utility model is achieved in that
A kind of Cam shaft for engine position transducer with temperature compensation, comprise shell, in shell, be separately installed with signal output part, the treatment circuit plate, magnet and Hall chip, shell is fixed on the outer cover of engine, Hall chip faces the signal gear on the camshaft that is installed under the shell, feature is: the magnetic temp compensating cover that " Qian " shape is installed between magnet and Hall chip, put the magnet chamber that is processed with a upward opening at magnetic temp compensating, the N level of columniform magnet extend in the magnet chamber downwards and closely is sleeved in the magnet chamber, Hall chip is close on the bottom surface of magnetic temp compensating cover, magnet, magnetic temp compensating cover and Hall chip are fixed together.
The utility model is to have increased a magnetic temp compensating cover between cylinder-shaped magnet and Hall chip, because the magnetic temp compensating cover adopts magnetic temperature compensating alloy to make, its outstanding feature is that the magnetic strength value can reduce with the temperature rising, the field weakening that brings thereby balanceable magnet Yin Wendu raises, play the temperature compensation function to magnetic field, also can adjust the magnetic field size simultaneously, be discernible thereby assurance offers the magnetic field intensity of Hall chip.
Therefore, the utility model carries out temperature compensation by the magnetic field to sensor internal, reduce the measuring error that temperature variation is brought, thereby raising sensor accuracy, make ECU under different temperatures, all obtain more accurately camshaft-position signal, have advantages of simple in structure, raising engine combustion efficiency, reduce fuel oil consumption and discharge of poisonous waste.
Description of drawings
Fig. 1 is the working timing figure of CMPS Camshaft Position Sensor;
Fig. 2 is sectional view of the present utility model;
Fig. 3 is the profile of Hall chip, magnet and magnetic temp compensating cover;
Fig. 4 is the side view behind Fig. 4 Rotate 180 degree.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.
A kind of Cam shaft for engine position transducer with temperature compensation, comprise shell 2, in shell 2, be separately installed with signal output part 1, treatment circuit plate 3, magnet 4 and Hall chip 5, shell 2 is fixed on the outer cover of engine, Hall chip 5 faces the signal gear 6 on the camshaft that is installed under the shell 2, the magnetic temp compensating cover 7 of " Qian " shape is installed between magnet 4 and Hall chip 5, be processed with the magnet chamber 8 of a upward opening at magnetic temp compensating cover 7, the N level of columniform magnet 4 extend in the magnet chamber 8 downwards and closely is sleeved in the magnet chamber 8, Hall chip 5 is close on the bottom surface of magnetic temp compensating cover 7, magnet 4, magnetic temp compensating cover 8 and Hall chip 5 are fixed together.。
Claims (1)
1. Cam shaft for engine position transducer with temperature compensation, comprise shell, in shell, be separately installed with signal output part, the treatment circuit plate, magnet and Hall chip, shell is fixed on the outer cover of engine, Hall chip faces the signal gear on the camshaft that is installed under the shell, it is characterized in that: the magnetic temp compensating cover that " Qian " shape is installed between magnet and Hall chip, put the magnet chamber that is processed with a upward opening at magnetic temp compensating, the N level of columniform magnet extend in the magnet chamber downwards and closely is sleeved in the magnet chamber, Hall chip is close on the bottom surface of magnetic temp compensating cover, magnet, magnetic temp compensating cover and Hall chip are fixed together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220519686 CN202836587U (en) | 2012-10-11 | 2012-10-11 | Camshaft position sensor with temperature compensation for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220519686 CN202836587U (en) | 2012-10-11 | 2012-10-11 | Camshaft position sensor with temperature compensation for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202836587U true CN202836587U (en) | 2013-03-27 |
Family
ID=47948272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220519686 Expired - Fee Related CN202836587U (en) | 2012-10-11 | 2012-10-11 | Camshaft position sensor with temperature compensation for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202836587U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123842A (en) * | 2016-08-31 | 2016-11-16 | 南昌工控电装有限公司 | A kind of CMPS Camshaft Position Sensor detection device |
| CN107584332A (en) * | 2017-10-25 | 2018-01-16 | 东风设备制造有限公司 | Camshaft machine identification device and its detection method |
-
2012
- 2012-10-11 CN CN 201220519686 patent/CN202836587U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106123842A (en) * | 2016-08-31 | 2016-11-16 | 南昌工控电装有限公司 | A kind of CMPS Camshaft Position Sensor detection device |
| CN106123842B (en) * | 2016-08-31 | 2019-05-17 | 南昌工控电装有限公司 | A kind of CMPS Camshaft Position Sensor detection device |
| CN107584332A (en) * | 2017-10-25 | 2018-01-16 | 东风设备制造有限公司 | Camshaft machine identification device and its detection method |
| CN107584332B (en) * | 2017-10-25 | 2023-10-24 | 东风设备制造有限公司 | Cam shaft model identification device and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20131011 |