EP2795276A2 - Capteur de temperature - Google Patents
Capteur de temperatureInfo
- Publication number
- EP2795276A2 EP2795276A2 EP12810377.7A EP12810377A EP2795276A2 EP 2795276 A2 EP2795276 A2 EP 2795276A2 EP 12810377 A EP12810377 A EP 12810377A EP 2795276 A2 EP2795276 A2 EP 2795276A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrical
- sensor according
- insulator
- wire
- lug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K2007/163—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements provided with specially adapted connectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2205/00—Application of thermometers in motors, e.g. of a vehicle
- G01K2205/04—Application of thermometers in motors, e.g. of a vehicle for measuring exhaust gas temperature
Definitions
- the present invention relates to a temperature sensor, especially for measuring high temperatures.
- the invention applies in particular to temperature sensors adapted to measure the temperature of motor vehicle gases such as exhaust gases or gases in the engine compartment.
- Such sensors include a temperature sensitive element such as a thermistor, connected to the outside to an electrical / electronic circuit for operating a measurement signal, via electrical wires.
- a temperature sensitive element such as a thermistor
- such a sensor comprises at one end a thermistor housed in a protective housing and two first electrical wires in contact with this thermistor run along the protective housing to be accessible outside thereof. to provide electrical information representative of the resistance of the thermistor and therefore the measured temperature.
- the first electrical wires are connected for example by means of an electrical connection means, for example in the form of connection terminals, to second electric wires, serving to provide the electrical connection with the electrical / electronic circuits.
- Such a sensor being used in particular in the exhaust line or in the engine compartment, it is exposed to a very hostile environment due to a corrosive environment and projections of oil or water. It is therefore important to ensure a good seal vis-à-vis the outside, especially at the second electrical son.
- this seal is provided by a seal in the sensor zone opposite to the temperature-sensitive element and having two parallel passage channels for the second electrical son.
- connection areas between the first and second electrical wires must be electrically isolated from each other and from the sensor body.
- connection areas For this purpose, an electrical insulator is provided around these connection areas.
- the electrical connection means for example in the form of connection terminals, is thus housed in the electrical insulator.
- the assembly of the connecting means to the electrical son is for example by crimping. This crimping is secured by a welding operation.
- this welding operation can not be implemented when the insulation is already arranged around the connection means, because the connection means is not accessible. It is therefore necessary to manipulate the insulation to be able to perform the welding operation.
- the invention therefore aims to overcome these disadvantages of the prior art.
- the subject of the invention is a temperature sensor for a motor vehicle comprising:
- At least one second electrical wire connected to the first wire and configured to transmit temperature information of said sensitive element
- said electrical insulator has at least one recess defining at least one open housing for receiving said connection means, so that said electrical connection means is accessible from outside said insulator.
- connection means remains accessible even when the electrical insulator is already in place around the connection area between the first and second electrical son.
- Said sensor may further comprise one or more of the following features, taken separately or in combination:
- said sensor comprises two first electrical wires connected to said temperature sensitive element, and two second electrical wires respectively connected to the first wires;
- said electrical connection means comprises at least one connection terminal electrical, and said at least one open housing is for receiving said at least one connecting lug;
- said electrical connection means comprises two electrical connection lugs, and said electrical insulator has two recesses delimiting two open housings for receiving respectively the two connection lugs and a separating wall extending between the two recesses so as to isolate the two lugs. electrical connection with respect to each other;
- said at least one connecting lug has a first lug portion associated with a first electrical wire and a second lug portion associated with a second electrical wire, and said first and second lug portions being interconnected by a connecting flange. ;
- connection lug is crimped onto said first and second electrical wires to be connected
- said at least one connecting lug is soldered to said first and second electrical wires to be connected;
- said open housing is shaped to allow the introduction of said at least one connecting lug in said housing in the welding position;
- said at least one terminal has a substantially trapezoidal cross section, so that said at least one terminal is immobilized in rotation in said housing;
- the bottom of said housing has a substantially trapezoidal or oblong or rectangular shape
- said second pod portion has a substantially trapezoidal cross section
- said electrical insulator has a generally cylindrical general shape
- said insulator comprises at least one first passage channel for the first electrical wire and at least one second passage channel for the second electrical wire;
- said electrical insulator is made of ceramic
- said electrical insulator is made of high temperature plastic material
- the second passage channel is closed; in other words, the second channel of passage can be defined by an opening made in the material of the insulation; the second passage channel is in particular delimited by a closed wall.
- FIG. 1 represents a view in longitudinal section of a sensor according to the invention
- FIG. 2a is a perspective view of an electrical insulator
- FIG. 2b is a perspective view of a portion of the sensor of FIG. 1 representing the insulator of FIG. 2a receiving electrical wires and two terminal lugs having a first and a second pod portion;
- FIG. 3a is a schematic sectional view showing the electrical insulator and the first terminal portions of the two terminal lugs
- FIG. 3b is a schematic sectional view showing the electrical insulator and the second lug parts of the two terminal lugs.
- FIG. 1 shows a temperature sensor 1 comprising a protective casing 3 of tubular general shape housing:
- a temperature sensitive element such as a thermistor 5
- the protective housing 3 is made of a metal material resistant to high temperatures, such as an alloy of chromium, nickel and iron type Inconel ® 601 (trademark) or refractory steel.
- the housing 3 may comprise a first part 3a at the thermistor 5 and a second part 3b with a larger diameter than the first part 3a at the connection area of the first 7s and 2s. 9 electric wires.
- This housing 3 may comprise a fastening system 17 on a wall (not shown) delimiting a medium whose temperature is to be known, such as the cylinder head of an engine.
- the fastening system 17 may include an outer stop 19 and a clamping means such as a screw 21 for clamping the stop 19 against a bearing surface complementary to the wall defining the medium to be measured.
- Thermistor 5 is a passive component in semiconductor material whose resistance varies as a function of temperature and can be of the CTN type, negative temperature coefficient (or NTC, Negative Temperature Coefficient) when the resistance decreases as a function of temperature. elevation of the temperature or type CTP positive temperature coefficient (or PTC, Positive Temperature Coefficient in English) otherwise.
- the electric wires 7, 9, may be of different diameters.
- the second electrical son 9 may be larger in diameter and less noble materials than the first electrical son 7, to reduce costs.
- the first electrical wires 7 are held in an insulating sheath 23 having an associated passage channel 25 for each first electrical wire 7 so that they are isolated from each other and held by the insulating sheath 23.
- the insulating sheath 23 is of generally elongated shape, the longitudinal direction of which corresponds to the direction of the first electric wires 7.
- This sheath 23 comprises a casing of cylindrical general shape, so as to be able to fit the tubular wall, for example of the first part 3a, the protective housing 3 and be maintained by it.
- the sheath 23 is internally made of electrically insulating ceramic material and resistant to heat, and outside for example refractory steel.
- first electrical wires 7 each have an end connected to the thermistor 5 and an opposite end connected to a second electrical wire 9.
- the first electrical wires 7 are connected via the connection means 15 to the second electric wires 9.
- connection means 15 is received at least partially in at least one open housing 29 of the insulator 11 better visible in Figures 2a and 2b.
- the electrical insulator 11 has at least one recess 30, delimiting a housing 29 which is accessible from the outside of the insulator 11. And therefore, the connection means 15 remains accessible, for example for a assembly operation as described later, even when the insulator 1 1 already surrounds the connection means 15.
- the insulator 11 furthermore has, on the one hand, two first passage channels 31 for the first electrical wires 7 and two second passage channels 33 for the second electric wires 9.
- the second electrical wires 9 at the outlet of the insulator 11 pass then through passage channels 35 in the seal 13.
- first passage channels 31 open for example into the open housing 29 of the connection means 15.
- the electrical connection means 15 comprises two electrical connection terminals 27 for respectively connecting a first wire 7 to a second associated wire 9.
- This is for example stainless steel lugs.
- the insulator 11 has two open housings 29 respectively associated with a connecting lug 27.
- Two recesses 30 are for example made in parallel manner on the same side of the body of the insulator 1 1, so as to delimit each respective open housing 29.
- the first passage channels 31 are, according to the illustrated example, open and form the bottom of the housings 29 of the insulator 11 to receive the connecting lugs 27, as can be seen more clearly in FIGS. 3a and 3b.
- the second passage channels 33 are of smaller diameter than the first passage channels 31 as shown in Figure 2a.
- the second passage channels 33 may have diameters adjusted to the second electrical wires 9.
- the introduction of a terminal 27 in a housing 29 is limited, the pods 27 abutting around the entrance of the second passageway 33.
- the electrical insulator 11 may comprise a separating wall 37 extending between the two recesses 30 so as to isolate the two connection terminals 27 from each other. the other.
- This separating wall 37 is made in one piece with the insulator 11.
- this partition wall 37 may have two recesses 39 of thinning on each side of the wall 31 at the passage of each first wire 7 and the connecting terminal 27 associated.
- the electrical insulator 11 thus makes it possible to electrically isolate the two connecting lugs 27 with respect to one another.
- Terminal lugs 27 are now described in more detail.
- a connection terminal 27 is made in two parts; a first lug portion 28a and a second lug portion 28b which are interconnected by a connecting flange 28c.
- the first lug portion 28a is associated with a first electric wire 7 while the second lug portion 28b is associated with a second electric wire 9.
- the first pod part 28a has for example a generally "U" -shaped general shape before crimping; the base receiving the first electrical wire 7 and the two lateral arms surrounding on either side the first electrical wire 7.
- the two lateral arms of the substantially "U" shape are for example folded one on the other and the first wire 7 as seen in Figures 2b and 3a. It is thus possible to center the first electrical wire 7.
- the second lug portion 28b is for example configured for a crimp said "heart" as noted in Figure 3b.
- the second pod portion 28b also comprises a base for receiving the second wire 9 and two lateral arms which are folded into the heart.
- the base of the second pod portion 28b has a rounded shape facing outwardly of the portion when the side arms are folded. This rounded shape makes it easier to fold the side arms and to limit the mechanical stresses on the portion during folding.
- This two-part form 28a, 28b of a connecting lug 27 is particularly suitable when one of the electrical wires to be connected, for example here the first electric wire 7, is single-strand, while the other wire, for example the second electric wire 9 is multi-stranded.
- the first single-stranded electric wire 7 is more rigid than the multi-strand wire, for example has a diameter of 0.7 mm
- the second multi-strand wire 9 is more flexible than the mono wire.
- -brin for example has a diameter of 0.9 mm.
- the embodiment in two parts 28a, 28b of a connection terminal 27 as described above solves the problem of connection between a single-strand wire and a multi-strand wire of different diameter while guaranteeing connection reliability. .
- connection terminals 27 can be assembled to the first 7 and second 9 electrical wires to be connected, for example by crimping and / or welding.
- the welding operation makes it possible to secure the crimping.
- This welding operation is facilitated by the fact that the connecting lugs 27 are accessible from the outside of the insulator 1 1, because received in open housing 29 of the insulator 11. This welding operation can take place even if the insulator 11 is already set up around the connection means 15; it is therefore not necessary to provide manipulation of the insulator 11 to perform this operation.
- housings 29 are respectively shaped so as to impose the placement of the terminal lugs 27 in the welding position, that is to say with the correct orientation to allow the welding operation.
- the pods 27 respectively have a substantially trapezoidal cross section which engages in the bottom of the housing 31, so as to allow the introduction of the pods 27 in the housings 29 only in the welding position.
- the funds 31 of the housing 29 have a complementary shape, for example substantially oblong, or rectangular or trapezoidal, to allow the introduction of the lugs 27 in the housing 29 only in the welding position.
- the second pod portion 28b that has such a substantially trapezoidal cross section that engages in the bottom of a housing 29.
- the electrical insulator 11 has for example a generally cylindrical shape so as to marry the tubular wall, for example the second portion 3b of the protective housing 3 and be maintained by it.
- the electrical insulator 11 is made of electrically insulating ceramic material and resistant to heat.
- steatite can be used.
- the seal 13 for example made of elastomer, may also have a generally cylindrical shape so as to be able to fit the tubular wall, for example the second portion 3b, of the protective housing 3 and be maintained by this one.
- Such substantially cylindrical seal 13 is also called a sealing sleeve.
- the seal or sealing sleeve 13 at the end of the sensor thus makes it possible to seal the outside of the body of the sensor 1.
- the electrical insulator 11 at the connection between the first 7 and second 9 electrical wires having an open design as described above, that is to say with housings 29 open to receive the means of connection 15, such as the two lugs 27, allows access to these lugs 27 even when the insulation 11 is already in place.
- This access to the lugs 27 allows in particular a simplified assembly, for example for the welding operation, between the lugs 27 and the electrical wires.
- the open housings 29 of the insulator 11 being shaped to impose the orientation of the lugs 27 for the welding operation, this makes it possible to further facilitate the welding operation, without requiring manipulation of the insulation 11.
- the second passage channels 33 can be closed.
- the second passage channels 33 may have diameters adjusted to the second electrical wires 9.
- the second electrical wires 9 are introduced into the second passage channels 33.
- the electrical insulator 1 1 is maintained in the sensor by the second electrical son 9.
- the insulator 1 1 is not likely to be lost during mounting in the protective housing 3 for example.
- the passage channels 31, 33 may be arranged on the same side of the insulator 11.
- the electrical connection of the first 7 and second 9 son can be made from the same side of the insulator 11.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1162080A FR2984494B1 (fr) | 2011-12-20 | 2011-12-20 | Capteur de temperature |
PCT/FR2012/052844 WO2013093284A2 (fr) | 2011-12-20 | 2012-12-07 | Capteur de temperature |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2795276A2 true EP2795276A2 (fr) | 2014-10-29 |
Family
ID=47505239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12810377.7A Withdrawn EP2795276A2 (fr) | 2011-12-20 | 2012-12-07 | Capteur de temperature |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2795276A2 (fr) |
FR (1) | FR2984494B1 (fr) |
WO (1) | WO2013093284A2 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3094949A4 (fr) * | 2014-01-17 | 2017-10-04 | Conflux AB | Agencement et procédé de mesure de la température |
FR3088424B1 (fr) * | 2018-11-08 | 2021-09-24 | Sc2N Sa | Capteur de temperature avec butee anti-rotation |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007212195A (ja) * | 2006-02-07 | 2007-08-23 | Denso Corp | 温度センサ及びその製造方法 |
DE102006015427B3 (de) * | 2006-03-31 | 2007-11-29 | Anton Gensler Gmbh | Messfühler für Hochtemperaturanwendungen |
DE102008056553A1 (de) * | 2008-11-10 | 2010-05-12 | Hella Kgaa Hueck & Co. | Temperatursensor |
-
2011
- 2011-12-20 FR FR1162080A patent/FR2984494B1/fr not_active Expired - Fee Related
-
2012
- 2012-12-07 EP EP12810377.7A patent/EP2795276A2/fr not_active Withdrawn
- 2012-12-07 WO PCT/FR2012/052844 patent/WO2013093284A2/fr active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2013093284A2 (fr) | 2013-06-27 |
FR2984494A1 (fr) | 2013-06-21 |
WO2013093284A3 (fr) | 2014-03-20 |
FR2984494B1 (fr) | 2017-03-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2013140066A1 (fr) | Capteur de temperature | |
FR2817041A1 (fr) | Capteur de temperature | |
FR2784183A1 (fr) | Palpeur de temperature | |
FR2836549A1 (fr) | Procede pour fabriquer un capteur de temperature et capteur de temperature ainsi fabrique | |
FR2896587A1 (fr) | Capteur de detection d'etat d'un liquide. | |
FR3053465A1 (fr) | Boitier de protection pour capteur de temperature de vehicule | |
FR2867862A1 (fr) | Dispositif pour capter une grandeur electrique d'un accumulateur | |
FR2835609A1 (fr) | Capteur de temperature a thermistance et son procede de fabrication | |
EP3584553A1 (fr) | Systeme de mesure de la temperature d'un fluide circulant dans une conduite | |
FR2896878A1 (fr) | Capteur de gaz dont la resistance a la chaleur est amelioree | |
EP2795276A2 (fr) | Capteur de temperature | |
FR2711393A1 (fr) | Système comprenant une prise de température notamment sur tubulure plastique. | |
FR2880685A1 (fr) | Capteur de temperature, notamment pour vehicule automobile | |
WO2020193597A1 (fr) | Boitier de protection pour capteur de température de véhicule | |
WO2012013897A1 (fr) | Vanne thermostatique comportant une cartouche chauffante | |
EP3668286A1 (fr) | Systeme d'etancheite pour un equipement electrique | |
FR2958037A1 (fr) | Capteur de temperature | |
WO2016170267A1 (fr) | Capteur hautes temperatures avec connecteur integre | |
WO2016185138A1 (fr) | Elément de renfort pour capteur hautes températures avec connecteur intégré | |
EP1426748A1 (fr) | Capteur haute température et procédé d'assemblage de celui-ci | |
WO2008055619A1 (fr) | Capteur pour milieux hostiles | |
EP3949026B1 (fr) | Capteur de température pour moteur de véhicule et procédé de fabrication d'un tel capteur | |
EP1953512B1 (fr) | Capteur de haute température et procédé de fabrication d' un tel capteur | |
FR3125363A1 (fr) | Dispositif de protection d’un organe de connexion d’un catalyseur de véhicule automobile | |
FR2958039A1 (fr) | Capteur de temperature |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20140605 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SEIGNEUR, MARC Inventor name: RIVIERE, LUDOVIC Inventor name: SANNIER, JEAN |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20160909 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20170120 |