CN105203010B - Automatic clutch sensing system - Google Patents
Automatic clutch sensing system Download PDFInfo
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- CN105203010B CN105203010B CN201510734113.9A CN201510734113A CN105203010B CN 105203010 B CN105203010 B CN 105203010B CN 201510734113 A CN201510734113 A CN 201510734113A CN 105203010 B CN105203010 B CN 105203010B
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Abstract
Low and high level signal is changed into through sensor process circuit be conveyed to automotive control system the present invention relates to a kind of automatic clutch sensing system, including automatic clutch sensor and sensor process circuit, after automatic clutch sensor generation switching signal；Automatic clutch sensor includes Clutch main cylinder, piston, permanent magnet, sensing device, and sensing device includes Hall switching element I, Hall switching element II, programmable hall element；Piston is located inside Clutch main cylinder, the permanent magnet that has on piston can the displacement together with piston along Clutch main cylinder axis, sensing device is installed outside Clutch main cylinder, Hall switching element I, programmable hall element, Hall switching element II are used for the change of magnetic field strength for sensing permanent magnet, programmable hall element reflects the stroke of Clutch main cylinder according to the PwM square waves of changes of magnetic field output duty cycle linear change.The present invention avoids mechanical contact working method, increases the automatic clutch sensing system of product service life.
Description
Technical field
The present invention relates to a kind of sensing system, more particularly to a kind of automatic clutch sensing system.
Background technology
With the development of automotive circuit diagram, cruise, lock function, electronic parking technology are required for obtaining clutch sensing
The signal of device.The duty cycle that clutch sensor exports switching signal and the electronic parking needs of cruise and lock function becomes
The pwm signal of change.
The content of the invention
Automatic clutch action is converted into electric signal the present invention provides one kind in view of the above problems and is conveyed to automobile control
System processed, avoids mechanical contact working method, increases the automatic clutch sensing system of product service life.
In order to solve problem above, the present invention provides a kind of automatic clutch sensing system, it is characterised in that：Including vapour
Car clutch sensor and sensor process circuit, automatic clutch sensor turn after producing switching signal by sensor process circuit
Chemical conversion low and high level signal is conveyed to automotive control system；
The automatic clutch sensor includes Clutch main cylinder, piston, permanent magnet, sensing device；
The sensing device includes Hall switching element, programmable hall element；
Include Hall switching element I, Hall switching element II described in the Hall switching element；
Piston is located inside Clutch main cylinder, can be provided with permanent magnet on piston, work as piston along Clutch main cylinder axis shift
When being subjected to displacement, the permanent magnet on piston also follows displacement together；
Sensing device is installed outside Clutch main cylinder, an entirety of Clutch main cylinder and sensing device composition and piston and
One entirety of permanent magnet composition produces relative motion when stepping on clutch；
Hall switching element I, programmable hall element, Hall switching element II are used for the magnetic field intensity for sensing permanent magnet
Change, it is using the magnetic bias sensing change of permanent magnet, i.e., forward direction is perpendicular to the magnetic field in Hall switching element induction point direction, also
That is effective magnetic field, Hall switching element I are that positive magnetic field is effective, and Hall switching element II is that opposing magnetic field is effective；
When stepping on clutch pedal, permanent magnet field is with motion change, the programmable hall element in sensing device
According to the PWM square waves of changes of magnetic field output duty cycle linear change, reflect the stroke of Clutch main cylinder.
The sensor process circuit that Clutch main cylinder amount of movement is converted into low and high level and pwm signal includes, connection
Device J1, capacitance C1, resistance R1, resistance R2, capacitance C2, diode D1, Hall switching element II U1, capacitance C3, resistance R3, electricity
Hinder R4, capacitance C4, diode D2, Hall switching element I U1, resistance R5, resistance R6, triode Q1, capacitance C5, it is programmable suddenly
That element U3, capacitance C6, capacitance C7, resistance R7, triode Q2, diode D3, diode D4, capacitance C9, capacitance C8, Hall electricity
Source chip U4, capacitance C10；
2,3,4 foot of its connector J1 terminals exports, and 5 feet connect positive pole, and 1 foot connects power cathode, positive pole and capacitance
C1 feet, diode D3 anodes, resistance R1 feet 2, resistance R2 feet 2, resistance R3 feet 2, resistance R4 feet 2, resistance R5 feet 1, triode Q1
Emitter is connected, and diode D3 cathodes are connected with diode D4 cathodes, capacitance C9 feet 1, capacitance C8 feet 2, power supply chip U4 feet 1,
Power supply chip U4 feet 3 are connected with capacitance C10 feet 1, capacitance C7 feet 2, programmable hall element U3 feet 1, resistance R1 feet 1 and R2 feet 1,
Capacitance C2 feet 1, diode D1 cathodes, Hall switching element II U1 feet 1 are connected, Hall switching element IIU1 feet 2 and capacitance C3 feet
1st, connector J1 feet 4 are connected, resistance R3 feet 1 and R4 feet 1, capacitance C4 feet 2, diode D2 cathodes, Hall switching element I U1 feet 1
It is connected, Hall switching element I U1 feet 2 are connected with resistance R5 feet 2, resistance R6 feet 2, resistance R6 feet 1 and triode Q1 base stage phases
Even, triode Q1 collectors are connected with capacitance C5 feet 1, connector J1 feet 2, programmable hall element U3 feet 4 and 1 phase of capacitance C6 feet
Even, capacitance C6 feet 2 are connected with resistance R7 feet 1, and resistance R7 feet 2 are connected with triode Q2 base stages, and triode Q2 collectors are with being connected
Device J1 feet 3 are connected,
Capacitance C1 feet 2, capacitance C2 feet 2, capacitance C3 feet 2, capacitance C4 feet 1, capacitance C5 feet 2, capacitance C6 feet 2, capacitance C7 feet
1st, capacitance C8 feet 1, capacitance C9 feet 2, capacitance C10 feet 2, diode D1 anodes, diode D2 anodes, diode D4 anodes, Hall
Switch element II U1 feet 3, Hall switching element I U1 feet 3, programmable hall element U3 feet 2, power supply chip U4 feet 2, triode
Q2 emitters are connected with power cathode.
The permanent magnet is annular, and annular axis direction is its magnetizing direction.
The Hall switching element I 4, is in operating temperature range：During -40 DEG C~140 DEG C of scopes, it opens magnetic field
Value range be 3.4~7.7mT, its close magnetic field value range be 1.8~5.4mT；The Hall switching element II
6, be in operating temperature range：During -40 DEG C~140 DEG C of scopes, it is -3~-7.7mT that it, which opens the value range in magnetic field, it is closed
The value range in magnetic field is -1.7~-5.4mT.
Beneficial effect：Inventive sensor system compared with mechanical switch, is avoided using being the design of Hall effect principle
The problem of product service life brought by mechanical wear is insufficient, so as to add security performance for automobile.And using programmable
Hall chip, can be programmed, reduced because master cylinder size according to the different master cylinders of client, different output function requirements
Different, output function requires different to need to redesign sensor.
Brief description of the drawings
Fig. 1 is the structure diagram of inventive sensor system；
Fig. 2 is effective magnetic field intensity schematic diagram used by inventive sensor；
Fig. 3 is the change schematic diagram of inventive sensor effective magnetic field intensity in automatic clutch；
Fig. 4 is the change schematic diagram of inventive sensor magnetic field intensity at 0 magnetic field；
Fig. 5 is the change schematic diagram of inventive sensor effective magnetic field intensity when automatic clutch discharges；
Fig. 6 is inventive sensor process circuit.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of automatic clutch sensing system, including automatic clutch sensor and sensor process circuit,
Low and high level signal is changed into by sensor process circuit be conveyed to automobile control after automatic clutch sensor generation switching signal
System processed；
The automatic clutch sensor includes Clutch main cylinder 1, piston 2, permanent magnet 3, sensing device 7；
The sensing device 7 includes Hall switching element, programmable hall element 5；
Include Hall switching element I 4, Hall switching element II 6 described in the Hall switching element；
Automatic clutch action is converted into the change of magnetic field intensity by automatic clutch lamp sensing system of the present invention, so
The change of magnetic field intensity is converted into electric signal afterwards and is conveyed to automotive control system.
Piston 2 when automatic clutch acts on automobile clutch system inside Clutch main cylinder 1 is along 1 axis position of Clutch main cylinder
To move, they coordinate compression clutch liquid to carry out automatic clutch, the mounting permanent magnet 3 on the internal piston 2 of Clutch main cylinder 1, in vapour
1 internal piston 2 of Clutch main cylinder is subjected to displacement during car clutch, so that the permanent magnet 3 on internal piston 2 is also followed together
Displacement, thus changes the magnetic field that clutch action is converted on master cylinder on certain fixed position.
It is provided with outside Clutch main cylinder 1 with Hall switching element I 4, programmable hall element 5, Hall switching element
The sensing device 7 of II 6, using Hall effect principle, when clutch occurs for automobile, 1 internal piston of Clutch main cylinder, 2 displacement with
Permanent magnet 3 moves, Hall switching element I 4, programmable hall member in the sensing device 7 outside Clutch main cylinder 1
Part 5, Hall switching element II 6 sense the change of magnetic field strength of permanent magnet, are ultimately converted to electric signal and are conveyed to automobile control
System.Three parts are included among these：
A. the Hall element being installed in the sensing device 7 on Clutch main cylinder 1, is installed on when clutch action occurs for automobile
Permanent magnet 3 on Clutch main cylinder 1 is subjected to displacement, for the sensing device 7 on master cylinder, on its Hall switching element
Magnetic field intensity at induction point changes, when magnetic field intensity reaches certain value Hall switching element I 4 (1.8~7.7mT), suddenly
Hall switching element produces switching signal during your switch element II 6 (- 1.7~-7.7mT)；
B. Clutch main cylinder 1 and sensing device 7 form a whole, whole with one of internal piston 2 and the composition of permanent magnet 3
Body produces relative motion in automatic clutch.In this process, magnetic field intensity changes at Hall switching element induction point,
Change procedure is as follows.
As shown in Fig. 2, S poles 8 and the permanent magnet N pole 9 of permanent magnet 3, the magnetic line of force 10 is opened through Hall in permanent magnet 3
Close the induction point of element, the magnetic field intensity B of the point013 horizontal component is invalid at sensor Hall switching element induction point
Magnetic field B111, the magnetic field intensity B of the point013 vertical component is the effective magnetic field B at Hall switching element induction point212。
1) note：Inventive sensor is used as sensing element using Hall switching element I 4, Hall switching element II 6, its
It is (i.e. positive perpendicular to the magnetic field in Hall switching element induction point direction, that is, effective magnetic field using the magnetic bias of permanent magnet 3
B212) sensing change, Hall switching element I 4 is that positive magnetic field is effective, and Hall switching element II 6 is that opposing magnetic field is effective；
2) note：For the permanent magnet 3 that the present invention uses for annular, annular axis direction is its magnetizing direction.
As shown in figure 3, in automatic clutch effective magnetic field intensity change：The S poles 8 of permanent magnet 3 and permanent magnet N pole
9, the magnetic line of force 8 passes through the induction point of Hall switching element, the magnetic field intensity B of the point in permanent magnet 3316 horizontal component is biography
Invalid magnetic field B at sensor Hall switching element induction point414, the magnetic field intensity B of the point316 vertical component is Hall switch
Effective magnetic field B at element senses point515。
Such as Fig. 4 institutes, the change of magnetic field intensity at 0 magnetic field：The S poles 8 of permanent magnet 3 and permanent magnet N pole 9, permanent magnetic
The magnetic line of force 8 passes through the induction point of Hall switching element, the magnetic field intensity B of the point in iron 3617 be entirely horizontal component, without vertical
The magnetic field intensity B of component, the i.e. point617 vertical component is 0.
When automatic clutch acts, the permanent magnet 3 on Clutch main cylinder 1 is subjected to displacement, relative to the sense on master cylinder
Answer for device 7, the magnetic field intensity at induction point on its Hall switching element changes, magnetic field intensity in original state and
Hall switching element induction point magnetic field intensity is 0mT, i.e., the magnetic field intensity B shown in Fig. 46Change between 17, produce Fig. 3 during this
Shown effective magnetic field intensity B515 magnetic field intensity points, the scope of 4 magnetic field intensities of Hall switching element I is 3.4~7.7mT, suddenly
Your scope of 6 magnetic field intensities of switch element II is -3~-7.7mT.Hall switching element is opened at this time, and by 7 turns of sensing device
It is melted into the electric signal needed for automobile clutch system.
As shown in figure 5, when automatic clutch discharges effective magnetic field intensity change：The S poles 8 of permanent magnet 3 and permanent magnetic
Iron N poles 9, the magnetic line of force 8 passes through the induction point of Hall switching element, the magnetic field intensity B of the point in permanent magnet 3720 level point
Measure the invalid magnetic field B at for sensor Hall switching element induction point818, magnetic field intensity B720 vertical component is Hall switch
Effective magnetic field B at element senses point819。
When automatic clutch discharges, the permanent magnet 3 on Clutch main cylinder 1 is subjected to displacement, relative to the sense on master cylinder
Answer for device 7, the magnetic field intensity at induction point on its Hall switching element changes, and magnetic field intensity is in Hall switch member
Part induction point magnetic field intensity is 0mT, i.e., the magnetic field intensity B shown in Fig. 46Change between 17 and original state, produce Fig. 5 during this
Shown effective magnetic field intensity B819 magnetic field intensity points, the scope of 4 magnetic field intensities of Hall switching element I is 1.8~5.4mT, suddenly
Your scope of 6 magnetic field intensities of switch element II is -1.7~-5.4mT, and Hall switching element is closed at this time, and by sensing device 7
Change into the electric signal needed for automobile clutch system.
Hall switching element I 4 is selected, the operating fields strength characteristics of Hall switching element I 4 are as shown in following table .1.(production
Product operating temperature range：- 40 DEG C~140 DEG C)
Table .1
Hall switching element II 6 is selected, the operating fields strength characteristics of Hall switching element II 6 are as shown in following table .2.
(product operating temperature range：- 40 DEG C~140 DEG C)
Table .2
C. low and high level signal is changed into by sensor process circuit be conveyed to vapour after Hall element generation switching signal
Vehicle control.
When stepping on clutch pedal, 3 magnetic field of permanent magnet is with motion change, the programmable hall member in sensing device 7
Part 5 reflects the stroke of Clutch main cylinder according to the PWM square waves of changes of magnetic field output duty cycle linear change.
Since Hall switching element I 4, Hall switching element II 6 only turn the displacement of permanent magnet 3 on internal piston 2
Switch motion is changed into, the low and high level of this and clutch control system requirement mismatches the switch, it is necessary to by Hall switching element
Function changes into low and high level signal and is conveyed to control system.For this reason, design treatment circuit with meet control system requirement.Certainly
Different low and high level requirements, sensor process circuit are different.
As shown in fig. 6, the biography that Clutch main cylinder amount of movement is converted into low and high level and pwm signal that present embodiment uses
Sensor process circuit：Including connector 21J1, capacitance C1, resistance R1, resistance R2, capacitance C2, diode D1, Hall switching element
II 6U1, capacitance C3, resistance R3, resistance R4, capacitance C4, diode D2, Hall switching element I 4U1, resistance R5, resistance R6,
Triode Q1, capacitance C5, programmable hall element 5U3, capacitance C6, capacitance C7, resistance R7, triode Q2, diode D3, two poles
Pipe D4, capacitance C9, capacitance C8, power supply chip U4, capacitance C10；
2,3,4 foot of its connector 21J1 terminals exports, and 5 feet connect positive pole, and 1 foot connects power cathode, positive pole and electricity
Hold C1 feet, diode D3 anodes, resistance R1 feet 2, resistance R2 feet 2, resistance R3 feet 2, resistance R4 feet 2, resistance R5 feet 1, triode
Q1 emitters are connected, diode D3 cathodes and diode D4 cathodes, capacitance C9 feet 1, capacitance C8 feet 2,1 phase of power supply chip U4 feet
Even, power supply chip U4 feet 3 are connected with capacitance C10 feet 1, capacitance C7 feet 2, programmable hall element 5U3 feet 1, resistance R1 feet 1 and R2
Foot 1, capacitance C2 feet 1, diode D1 cathodes, Hall switching element II6U1 feet 1 are connected, Hall switching element II 6U1 feet 2 and electricity
Hold C3 feet 1, connector 21J1 feet 4 are connected, resistance R3 feet 1 and R4 feet 1, capacitance C4 feet 2, diode D2 cathodes, Hall switch member
Part I 4U1 feet 1 are connected, and Hall switching element I 4U1 feet 2 are connected with resistance R5 feet 2, resistance R6 feet 2, resistance R6 feet 1 and three poles
Pipe Q1 base stages are connected, and triode Q1 collectors are connected with capacitance C5 feet 1, connector 21J1 feet 2, programmable hall element 5U3 feet 4
It is connected with capacitance C6 feet 1, capacitance C6 feet 2 are connected with resistance R7 feet 1, and resistance R7 feet 2 are connected with triode Q2 base stages, triode Q2
Collector is connected with connector 21J1 feet 3,
Capacitance C1 feet 2, capacitance C2 feet 2, capacitance C3 feet 2, capacitance C4 feet 1, capacitance C5 feet 2, capacitance C6 feet 2, capacitance C7 feet
1st, capacitance C8 feet 1, capacitance C9 feet 2, capacitance C10 feet 2, diode D1 anodes, diode D2 anodes, diode D4 anodes, Hall
Switch element II 6U1 feet 3, Hall switching element I 4U1 feet 3, programmable hall element 5U3 feet 2, power supply chip U4 feet 2, three
Pole pipe Q2 emitters are connected with power cathode.
The foregoing is only a preferred embodiment of the present invention, is not restricted to the present invention, for the technology of this area
For personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included within scope of the presently claimed invention.
Claims (4)
- A kind of 1. automatic clutch sensing system, it is characterised in that：Including automatic clutch sensor and sensor process circuit, vapour Low and high level signal is changed into by sensor process circuit be conveyed to automobile control after car clutch sensor generation switching signal System；The automatic clutch sensor includes Clutch main cylinder (1), piston (2), permanent magnet (3), sensing device (7)；The sensing device (7) includes Hall switching element, programmable hall element (5)；Include Hall switching element I (4), Hall switching element II (6) described in the Hall switching element；Piston (2) is located at Clutch main cylinder (1) inside, can be provided with permanent magnetic on (2) along Clutch main cylinder (1) axis shift, piston Iron (3), when piston (2) is subjected to displacement, the permanent magnet (3) on piston (2) also follows displacement together；One entirety of sensing device (7), Clutch main cylinder (1) and sensing device (7) composition is installed outside Clutch main cylinder (1) The entirety formed with piston (2) and permanent magnet (3) produces relative motion when stepping on clutch；Hall switching element I (4), programmable hall element (5), Hall switching element II (6) are used for the magnetic for sensing permanent magnet Field intensity changes, it is using the magnetic bias sensing change of permanent magnet (3), i.e., forward direction is perpendicular to Hall switching element induction point direction Magnetic field, that is, effective magnetic field, Hall switching element I (4) are that positive magnetic field is effective, and Hall switching element II (6) is reverse magnetic Field is effectively；When stepping on clutch pedal, 3 magnetic field of permanent magnet is with motion change, the programmable hall element in sensing device (7) (5) according to the PWM square waves of changes of magnetic field output duty cycle linear change, the stroke of Clutch main cylinder is reflected；The sensor process circuit includes connector J1 (21), capacitance C1, resistance R1, resistance R2, capacitance C2, diode D1, Hall switching element II (6) U1, capacitance C3, resistance R3, resistance R4, capacitance C4, diode D2, Hall switching element I (4) U2, resistance R5, resistance R6, triode Q1, capacitance C5, programmable hall element (5) U3, capacitance C6, capacitance C7, resistance R7, three Pole pipe Q2, diode D3, diode D4, capacitance C9, capacitance C8, power supply chip U4, capacitance C10；2,3,4 foot of its connector J1 (21) terminal exports, and 5 feet connect positive pole, and 1 foot connects power cathode, positive pole and capacitance C1 feet, diode D3 anodes, resistance R1 feet 2, resistance R2 feet 2, resistance R3 feet 2, resistance R4 feet 2, resistance R5 feet 1, triode Q1 Emitter is connected, and diode D3 cathodes are connected with diode D4 cathodes, capacitance C9 feet 1, capacitance C8 feet 2, power supply chip U4 feet 1, Power supply chip U4 feet 3 are connected with capacitance C10 feet 1, capacitance C7 feet 2, programmable hall element (5) U3 feet 1, resistance R1 feet 1 and R2 Foot 1, capacitance C2 feet 1, diode D1 cathodes, Hall switching element II (6) U1 feet 1 are connected, Hall switching element II (6) U1 feet 2 It is connected with capacitance C3 feet 1, connector J1 (21) foot 4, resistance R3 feet 1 and R4 feet 1, capacitance C4 feet 2, diode D2 cathodes, Hall Switch element I (4) U2 feet 1 are connected, and Hall switching element I (4) U2 feet 2 are connected with resistance R5 feet 2, resistance R6 feet 2, resistance R6 feet 1 is connected with triode Q1 base stages, and triode Q1 collectors are connected with capacitance C5 feet 1, connector J1 (21) foot 2, programmable hall Element (5) U3 feet 4 are connected with capacitance C6 feet 1, and capacitance C6 feet 2 are connected with resistance R7 feet 1, resistance R7 feet 2 and triode Q2 base stages It is connected, triode Q2 collectors are connected with connector J1 (21) foot 3,Capacitance C1 feet 2, capacitance C2 feet 2, capacitance C3 feet 2, capacitance C4 feet 1, capacitance C5 feet 2, capacitance C6 feet 2, capacitance C7 feet 1, electricity Hold C8 feet 1, capacitance C9 feet 2, capacitance C10 feet 2, diode D1 anodes, diode D2 anodes, diode D4 anodes, Hall switch Element II (6) U1 feet 3, Hall switching element I (4) U2 feet 3, programmable hall element (5) U3 feet 2, power supply chip U4 feet 2, three Pole pipe Q2 emitters are connected with power cathode.
- 2. automatic clutch sensing system according to claim 1, it is characterised in that：The permanent magnet (3) is ring Shape, annular axis direction are its magnetizing direction.
- 3. automatic clutch sensing system according to claim 1, it is characterised in that：The Hall switching element I (4), it is in operating temperature range：During -40 DEG C~140 DEG C of scopes, it is 3.4~7.7mT that it, which opens the value range in magnetic field, it is closed The value range for closing magnetic field is 1.8~5.4mT；The Hall switching element II (6), is in operating temperature range：During -40 DEG C~140 DEG C of scopes, it opens magnetic field Value range is -3~-7.7mT, and it is -1.7~-5.4mT that it, which closes the value range in magnetic field,.
- 4. automatic clutch sensing system according to claim 3, it is characterised in that：When the automatic clutch acts, The scope of Hall switching element I (4) magnetic field intensity is 3.4~7.7mT, the scope of Hall switching element II (6) magnetic field intensity for- 3~-7.7mT, at this time Hall switching element opening, and as the electric signal needed for sensing device (7) changes into automobile clutch system；When automatic clutch discharges, the scope of Hall switching element I (4) magnetic field intensity is 1.8~5.4mT, Hall switching element II (6) scope of magnetic field intensity is -1.7~-5.4mT, and Hall switching element is closed at this time, and changes into vapour by sensing device (7) Electric signal needed for car clutch system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510734113.9A CN105203010B (en) | 2015-11-03 | 2015-11-03 | Automatic clutch sensing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510734113.9A CN105203010B (en) | 2015-11-03 | 2015-11-03 | Automatic clutch sensing system |
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| Publication Number | Publication Date |
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| CN105203010A CN105203010A (en) | 2015-12-30 |
| CN105203010B true CN105203010B (en) | 2018-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510734113.9A Active CN105203010B (en) | 2015-11-03 | 2015-11-03 | Automatic clutch sensing system |
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| CN (1) | CN105203010B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654307A (en) * | 2019-09-18 | 2020-01-07 | 东风柳州汽车有限公司 | Brake lamp sensor |
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|---|---|---|---|---|
| CN1789689A (en) * | 2004-12-07 | 2006-06-21 | 环球冷却有限公司 | Apparatus for determining free piston position and an apparatus for controlling free piston position |
| CN102996689A (en) * | 2011-09-16 | 2013-03-27 | 株式会社万都 | Brake master cylinder |
| CN103253183A (en) * | 2013-06-08 | 2013-08-21 | 昆山市兴利车辆科技配套有限公司 | Automobile brake lamp sensor system |
| CN103264657A (en) * | 2013-06-08 | 2013-08-28 | 昆山市兴利车辆科技配套有限公司 | Vehicle brake lamp sensor |
| CN205120023U (en) * | 2015-11-03 | 2016-03-30 | 昆山市兴利车辆科技配套有限公司 | Car separation and reunion sensor system |
-
2015
- 2015-11-03 CN CN201510734113.9A patent/CN105203010B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789689A (en) * | 2004-12-07 | 2006-06-21 | 环球冷却有限公司 | Apparatus for determining free piston position and an apparatus for controlling free piston position |
| CN102996689A (en) * | 2011-09-16 | 2013-03-27 | 株式会社万都 | Brake master cylinder |
| CN103253183A (en) * | 2013-06-08 | 2013-08-21 | 昆山市兴利车辆科技配套有限公司 | Automobile brake lamp sensor system |
| CN103264657A (en) * | 2013-06-08 | 2013-08-28 | 昆山市兴利车辆科技配套有限公司 | Vehicle brake lamp sensor |
| CN205120023U (en) * | 2015-11-03 | 2016-03-30 | 昆山市兴利车辆科技配套有限公司 | Car separation and reunion sensor system |
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| CN105203010A (en) | 2015-12-30 |
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Inventor after: Xu Zhenhua Inventor after: Jiang Jilong Inventor before: Xu Zhenhua Inventor before: Hu Yougang |