WO2013168649A1 - ガスセンサ - Google Patents
ガスセンサ Download PDFInfo
- Publication number
- WO2013168649A1 WO2013168649A1 PCT/JP2013/062664 JP2013062664W WO2013168649A1 WO 2013168649 A1 WO2013168649 A1 WO 2013168649A1 JP 2013062664 W JP2013062664 W JP 2013062664W WO 2013168649 A1 WO2013168649 A1 WO 2013168649A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- protector
- peripheral wall
- introduction hole
- hole
- gas
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4077—Means for protecting the electrolyte or the electrodes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4073—Composition or fabrication of the solid electrolyte
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4075—Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts
Definitions
- the present invention relates to a gas sensor including a protector that protects a detection element exposed to a detection gas from water.
- a gas sensor provided with a detection element that generates electromotive force of different magnitude or changes its resistance value according to the concentration of a specific gas, such as NOx (nitrogen oxide) or oxygen, in an exhaust gas of an automobile or the like It has been known.
- This gas sensor is used by being attached to the exhaust pipe of an automobile, etc., but the detection element becomes hot by heating the detection element or exposing the detection element to high-temperature exhaust gas. If the detection element is subjected to a thermal shock due to the moisture (water droplets) contained in the gas adhering (watering) to the detection element, there is a possibility that cracks or cracks may occur. Therefore, a protector that covers the detection element is attached to the gas sensor, and the detection element is protected from being exposed to water.
- a specific gas such as NOx (nitrogen oxide) or oxygen
- the protector has a double structure of an inner protector that covers the detection element and an outer protector that covers the inner protector.
- the outer protector is formed with a gas introduction hole for introducing exhaust gas into the inside.
- the gas introduction hole is formed in a long and narrow hole shape in the axial direction of the gas sensor.
- the present invention has been made to solve the above-described problems, and provides a gas sensor that can reliably prevent the detection element from getting wet without reducing the efficiency of introducing exhaust gas into the protector that covers the detection element.
- the purpose is to provide.
- the detection element that extends in the axial direction and has a detection unit for detecting a specific gas component in the gas to be detected on the tip side, and the detection unit are protruded from the tip of its own.
- a metal shell that surrounds and holds the periphery of the detection element in the radial direction, a peripheral wall and a distal end wall on the distal end side thereof, and the opening on the proximal end side in the state in which the detection unit is accommodated inside
- a protector in which an end portion is fixed to the tip end portion of the metal shell and an introduction hole for introducing the gas to be detected is formed in the peripheral wall, or one or a plurality of protectors are stacked.
- a plurality of the introduction holes formed in the protector are provided in the circumferential direction of the peripheral wall, and the opening length in the circumferential direction is a lateral hole shape larger than the opening length in the direction orthogonal to the circumferential direction.
- Gas characterized by Capacitors are provided.
- a plurality of the introduction holes formed in the protector are provided in the circumferential direction of the peripheral wall, and the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction. Therefore, the introduction efficiency of the exhaust gas into the protector covering the detection element is not lowered, and the introduction hole can reliably prevent the detection element from being wet compared to the shape of the hole that is long in the axial direction of the gas sensor. . Therefore, it is possible to prevent the detection element from being damaged due to water droplets adhering to the detection element.
- the detection element that extends in the axial direction and has a detection unit for detecting a specific gas component in the gas to be detected on the tip side, and the detection unit are protruded from the tip part of itself.
- a metal shell that surrounds and holds the periphery of the detection element in the radial direction, a peripheral wall and a distal end wall on the distal end side thereof, and the opening on the proximal end side in the state in which the detection unit is accommodated inside
- a protector in which an end portion is fixed to the tip end portion of the metal shell and an introduction hole for introducing the gas to be detected is formed in the peripheral wall, or one or a plurality of protectors are stacked.
- the introduction hole formed in the protector is a plurality of holes provided in the circumferential direction of the peripheral wall, and one of the holes has an opening length in the circumferential direction orthogonal to the circumferential direction. Longitudinal hole smaller than the opening length in the direction.
- the gas sensor which is a hole portion of the transverse bore corresponds formed in close proximity to Jo hole portion into a plurality the circumferential direction is provided.
- the introduction hole formed in the protector is a plurality of holes provided in the circumferential direction of the peripheral wall, and one of the holes has an opening length in the circumferential direction in the circumferential direction. Is a hole corresponding to a horizontal hole formed by making a plurality of vertical hole portions smaller than the opening length in the direction orthogonal to the circumferential direction, so that the strength of the introduction hole portion is not reduced and detection is performed.
- the introduction efficiency of the exhaust gas into the protector that covers the element is not lowered.
- the introduction hole can be reliably prevented from being wetted by the detection element as compared with the shape of the hole that is long in the axial direction of the gas sensor. Therefore, it is possible to prevent the detection element from being damaged due to water droplets adhering to the detection element.
- L2 / L1 may be 0.3 or more. If L2 / L1 is 0.3 or more, the ventilation of the introduction hole is sufficient, the response of the detection element 10 is not deteriorated, and the detection element is a detection element as compared with a hole shape that is long in the axial direction of the gas sensor. Can be reliably prevented.
- L2 / L1 may be 0.52 or more.
- the introduction hole is a horizontal hole and ventilation is sufficient, and the responsiveness of the detection element 10 does not deteriorate, and the introduction hole covers the detection element with water as compared with the shape of the hole elongated in the axial direction of the gas sensor. It can be surely prevented.
- L3 the length of the introduction hole in the circumferential direction of the peripheral wall of the protector is L3 and the length of the introduction hole in the direction orthogonal to the L3 is L4, L3 / L4 is 3 or more. Also good. In this case, the introduction hole can sufficiently function as a lateral hole.
- a circular cross section obtained by cutting the protector at a plane perpendicular to the axial direction and passing through the introduction hole is divided into a plurality of lines by a straight line passing through the center, at least one introduction hole is provided in each divided region. It may be present. In this case, since the introduction hole is provided in each divided region, there is no restriction on the rotation angle of the attachment of the gas sensor to the exhaust passage.
- the protector has a peripheral wall and a distal end wall on the distal end side thereof, and the opening end portion on the proximal end side is fixed to the distal end portion of the metal shell in a state where the detection portion is accommodated in the protector And at least the peripheral wall of the inner protector while having a gap between the inner protector in which an inner introduction hole for introducing the gas to be detected is introduced into the peripheral wall and the inner protector.
- An outer protector having a cylindrical shape that surrounds and having an outer introduction hole for introducing the detected gas into the gap on its peripheral wall, the outer introduction hole is a hole portion having the lateral hole shape,
- the outer introduction hole may be provided in a peripheral wall of the outer protector other than a position opposed to the inner introduction hole.
- the outer introduction hole is composed of at least one of the horizontal hole-shaped hole portion and the hole portion corresponding to the horizontal hole, and the outer protector other than the position facing the inner introduction hole. Since the outer introduction hole is provided in the peripheral wall, the water droplet that has entered from the outer introduction hole does not reach the inner introduction hole and collides with the peripheral wall of the inner protector. Therefore, the detection element can be reliably prevented from getting wet. Further, the efficiency of introducing exhaust gas into the protector that covers the detection element is not reduced.
- the outer introduction hole may be provided on the distal end side in the axial direction with respect to the inner introduction hole on the most proximal end side in the peripheral wall of the outer protector.
- the water droplets entering from the outer introduction hole do not reach the inner introduction hole, collide with the peripheral wall of the inner protector, and are discharged from the front end side of the outer protector. Therefore, the detection element can be reliably prevented from getting wet.
- a plurality of the outer introduction holes may be provided in the axial direction on the peripheral wall of the outer protector. In this case, the amount of exhaust gas entering from these introduction holes is sufficient, and the response of the detection value to the exhaust gas of the detection element is not delayed. Further, since the outer introduction hole is provided over the entire circumference of the peripheral wall of the outer protector, there is no limitation on the rotation angle of the attachment of the gas sensor to the exhaust passage.
- FIG. 2 is a partial cross-sectional view of the gas sensor 1.
- FIG. It is the front view of the protector 100 of 1st embodiment seen from the same direction as FIG. It is a longitudinal cross-sectional view of the protector 100 of 1st embodiment of the same direction as the cross section of FIG. It is a front view of the protector 100 of 2nd embodiment. It is a longitudinal cross-sectional view of the protector 100 of 2nd embodiment of the same direction as the cross section of FIG. It is a front view of the protector 100 of 3rd embodiment. It is a longitudinal cross-sectional view of the protector 100 of 3rd embodiment of the same direction as the cross section of FIG. It is a perspective view of the outer side protector 110.
- FIG. 7 is a plan view showing individual lengths M2 in the circumferential direction of the peripheral wall 112 of the outer introduction hole 170 when the outer protector 110 is projected onto a plane perpendicular to the axis O.
- FIG. 7 is a perspective view of the outer side protector 110.
- FIG. 7 is a plan view showing individual lengths M2 in the circumferential direction of the peripheral wall 112 of the outer introduction hole 170 when the outer protector 110 is projected onto a plane perpendicular to the axis O.
- FIG. 7 is a front view of an outer introduction hole 170.
- FIG. 6 is a front view of the protector 100 of 5th embodiment. It is a longitudinal cross-sectional view of the protector 100 of 5th embodiment of the same direction as the cross section of FIG. It is a cross-sectional view of the protector 100 of the fifth embodiment. It is a graph of the result of a 2nd analysis simulation. 6 is a front view of a modified example of the outer introduction hole 170.
- FIG. It is a longitudinal cross-sectional view of the protector 100 of the 4th comparative example of the same direction as the cross section of FIG. It is a longitudinal cross-sectional view of the protector 100 of 6th Embodiment of the same direction as the cross section of FIG.
- FIGS. 1 to 3 the axis O direction of the gas sensor 1 (indicated by a one-dot chain line) is shown as a vertical direction, and the detection unit 11 side of the detection element 10 held inside is the front end side and the rear end portion 12 of the gas sensor 1.
- the side (see FIG. 2) will be described as the rear end side of the gas sensor 1.
- a gas sensor 1 shown in FIG. 1 is attached to an exhaust pipe (not shown) of an automobile, and a detection unit 11 of a detection element 10 held inside is exposed to exhaust gas flowing in the exhaust pipe, and is included in the exhaust gas.
- An example is a so-called oxygen sensor that detects an oxygen concentration as a gas to be detected.
- the detection element 10 has a narrow plate shape extending in the direction of the axis O as is well known, a gas detection body for detecting the oxygen concentration, and a heater body for heating to activate the gas detection body early.
- a gas detection body for detecting the oxygen concentration
- a heater body for heating to activate the gas detection body early.
- the gas detector is composed of a solid electrolyte body mainly composed of zirconia, a detection electrode mainly composed of platinum, and the like (not shown), and the detection electrode is disposed in the detection section 11 on the distal end side of the detection element 10. .
- six electrode pads 16 are shown in FIG.
- the detection element 10 is described as the “detection element” in the present invention.
- the heater element is not necessarily required as the configuration of the detection element, and the gas detection element is the “detection element” of the present invention. It corresponds to “element”.
- a metal cup 20 made of metal having an opening 25 on the bottom wall in the shape of a bottomed cylinder is disposed at a position slightly on the tip side from the center of the body 13 of the detection element 10.
- the detection element 10 is inserted into the metal cup 20 through the opening 25, and the detection unit 11 protrudes from the opening 25 to the tip side.
- the metal cup 20 is a member for holding the detection element 10 in the metal shell 50, and a tip peripheral portion 23 having a tapered shape from the bottom wall to the outer peripheral wall is formed at the edge portion of the bottom wall.
- an alumina ceramic ring 21 and a talc ring 22 obtained by compressing and solidifying talc powder are arranged and housed in layers in the direction of the axis O while surrounding the detection element 10.
- the talc ring 22 is crushed in the metal cup 20 so as to be filled in details, whereby the detection element 10 is positioned and held in the metal cup 20.
- the detection element 10 integrated with the metal cup 20 is surrounded and held by a cylindrical metal shell 50 made of low carbon steel such as SUS430.
- the metal shell 50 is for attaching and fixing the gas sensor 1 to an exhaust pipe (not shown) of an automobile, and an attachment portion 51 having a male screw for attachment to the exhaust pipe is provided on the outer peripheral tip side. .
- a distal end engaging portion 56 to which a protector 100 described later is engaged is formed on the distal end side of the mounting portion 51.
- a tool engaging portion 52 with which a tool for attachment is engaged is formed at the center of the outer periphery of the metal shell 50.
- a rear end engagement portion 57 with which an outer cylinder 30 described later is engaged is formed on the rear end side of the tool engagement portion 52.
- the detection element 10 is added in the metal shell 50.
- a caulking portion 53 is formed for tightening and holding.
- the annular gasket 55 which prevents the gas escape when attaching to an exhaust pipe is inserted.
- a stepped portion is provided in the vicinity of the attachment portion 51 on the inner periphery of the metal shell 50, and the tip peripheral portion of the metal cup 20 that holds the detection element 10 described above is provided in the stepped portion. 23 is locked.
- a talc ring 26 is loaded on the inner periphery of the metal shell 50 from the rear end side of the metal cup 20 with the detection element 10 inserted therethrough.
- a cylindrical sleeve 27 is fitted into the metal shell 50 while allowing the detection element 10 to pass through so as to hold down the talc ring 26 from the rear end side.
- a shoulder portion 28 having a step shape is formed on the outer periphery of the rear end side of the sleeve 27, and an annular packing 29 is disposed on the shoulder portion 28.
- the crimping portion 53 of the metal shell 50 is crimped inward, and the shoulder portion 28 of the sleeve 27 is pressed toward the distal end side through the packing 29.
- the talc ring 26 pressed against the sleeve 27 is crushed in the metal shell 50 and filled in detail.
- the metal cup 20 and the detection element 10 are positioned and held in the metal shell 50 by the talc ring 26 and the talc ring 22 loaded in advance in the metal cup 20.
- the rear end portion 12 of the detection element 10 protrudes rearward from the rear end (caulking portion 53) of the metal shell 50, and the rear end portion 12 is covered with a cylindrical separator 60 made of insulating ceramics. ing.
- the separator 60 includes a front end side separator 63 and a rear end side separator 64, and the rear end side separator 64 is engaged with a bowl-shaped flange portion 62 provided on the front end side separator 63.
- the front-end separator 63 includes six electrode pads 16 formed at the rear end portion 12 of the detection element 10 and six connection terminals 61 (one of them in FIG. 1) that is electrically connected to each of the electrode pads 16.
- part with the inside is accommodated and hold
- the rear end side separator 64 accommodates a connection portion between each connection terminal 61 and six lead wires 65 (four of which are shown in FIG. 1) drawn out of the gas sensor 1 inside. Yes.
- a cylindrical outer cylinder 30 made of stainless steel (for example, SUS304) is disposed so as to surround the periphery of the rear end portion 12 of the detection element 10 in which the separator 60 is fitted.
- the outer cylinder 30 has an opening end 31 on the front end side engaged with the outer periphery of the rear end engaging portion 57 of the metal shell 50.
- the open end 31 is crimped from the outer peripheral side, and further, laser welding is performed around the outer periphery and joined to the rear end engaging portion 57, whereby the outer cylinder 30 and the metal shell 50 are integrated. It has become.
- a metal-made cylindrical holding metal fitting 70 is disposed in the gap between the outer cylinder 30 and the front end side separator 63.
- the holding metal fitting 70 has a support portion 71 formed by bending the rear end of the holding metal 70 inward, and the support portion 71 is engaged with the flange portion 62 of the front end side separator 63 inserted into the inside thereof.
- the front end side separator 63 is held.
- the outer peripheral surface of the outer cylinder 30 where the holding metal fitting 70 is disposed is crimped inward, whereby the holding metal fitting 70 that supports the front end side separator 63 is fixed to the outer cylinder 30.
- a grommet 75 made of fluorine rubber is fitted into the opening on the rear end side of the outer cylinder 30.
- the grommet 75 has six insertion holes 76 (one of which is shown in FIG. 1), and the six lead wires 65 drawn from the separator 60 are inserted into the insertion holes 76 in an airtight manner.
- the grommet 75 is clamped from the outer periphery of the outer cylinder 30 and is fixed to the rear end of the outer cylinder 30 while pressing the rear end side separator 64 against the front end side separator 63.
- the detection portion 11 of the detection element 10 held by the metal shell 50 protrudes from the distal end portion (tip engagement portion 56) of the metal shell 50.
- the protector 100 is fitted to the tip engaging portion 56 and is fixed by spot welding or laser welding.
- the protector 100 is for protecting the detection part 11 of the detection element 10 from the contamination
- the protector 100 shown in FIGS. 2 and 3 includes an inner protector 120 having a bottomed cylindrical shape having a peripheral wall 122 and a distal end wall 124 on the distal end side thereof, and an outer shape having a cylindrical shape surrounding the periphery of the peripheral wall 122 in the radial direction by the peripheral wall 112 It has a double structure composed of the protector 110.
- a gas separation chamber 119 is formed between the outer surface 126 of the peripheral wall 122 of the inner protector 120 and the inner surface 117 of the peripheral wall 112 of the outer protector 110.
- the inner protector 120 has an outer diameter that is smaller than the distal end engaging portion 56 of the metal shell 50, and the base end portion 121 on the opening end side (rear end side) is engaged with the outer periphery of the distal end engaging portion 56. The diameter is expanded to match. Further, the peripheral edge portion of the tip wall 124 is configured as a tapered portion 123 that expands in a tapered shape toward the peripheral wall 122. In the peripheral wall 122 of the inner protector 120, a plurality of (in the present embodiment, twelve) inner introduction holes 125 are opened along the circumferential direction at positions close to the base end 121 in the axis O direction.
- the inner introduction hole 125 mainly detects the gas component of the exhaust gas introduced into the gas separation chamber 119 via the outer introduction hole 170 of the outer protector 110 described later, and detects the inside of the inner protector 120, that is, the detection element 10. This is a hole for introducing the portion 11 into the exposed gas detection chamber 129.
- a discharge port 160 is opened in the distal end wall 124 of the inner protector 120. Water droplets that have entered the inner protector 120 (in the gas detection chamber 129) are discharged to the outside of the protector 100 through the discharge port 160.
- the gas component introduced into the gas detection chamber 129 via the inner introduction hole 125 is also discharged to the outside via the discharge port 160, and gas exchange in the gas detection chamber 129 is performed. Yes.
- one end of the outer protector 110 has an enlarged diameter, and the base end 111 is engaged with the outer periphery of the base end 121 of the inner protector 120.
- the front end of the metal shell 50 passes through the base end portion 121 from the outer peripheral surface side of the base end portion 111.
- Laser welding reaching the engaging portion 56 is performed while making a round around the outer periphery of the base end portion 111. Thereby, the outer protector 110 and the inner protector 120 are fixed to the metal shell 50.
- the tip 113 of the outer protector 110 is bent inward in the vicinity of the tapered portion 123 of the inner protector 120.
- gap between the outer surface 126 of the surrounding wall 122 of the inner side protector 120 and the inner surface 117 of the outer side protector 110 is obstruct
- the taper part 123 of the taper-shaped inner protector 120 becomes a form protruded toward the front end side in the axis O direction from the front end part 113 of the outer protector 110.
- the distal end portion 113 of the outer protector 110 and the tapered portion 123 of the inner protector 120 form a continuous taper although the angles are different.
- a plurality of (four in this embodiment) outer introduction holes 170 that communicate the outside of the outer protector 110 and the gas separation chamber 119 are evenly spaced along the circumferential direction. It is formed with.
- the outer introduction hole 170 is formed at a position closer to the tip side than the formation position of the inner introduction hole 125 of the inner protector 120 in the axis O direction (that is, the position of the rear end of the outer introduction hole 170 is the inner introduction hole 125). It is arranged on the tip side from the position of the tip. Therefore, the outer introduction hole 170 is provided in the peripheral wall 112 of the outer protector 110 other than the position facing the inner introduction hole 125.
- the outer introduction hole 170 extends in the circumferential direction of the peripheral wall 112 and has a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction. The relationship between the circumferential length of the outer introduction hole 170 and the outer circumferential length of the peripheral wall 112 will be described later.
- the gas sensor 1 When the gas sensor 1 having such a configuration is attached to the exhaust pipe of the internal combustion engine, the gas sensor 1 is attached with the front end side in the axis O direction downward in the direction of gravity, and the front end side is exposed in the exhaust pipe from the attachment portion 51 of the metal shell 50.
- the Exhaust gas flowing through the exhaust pipe collides with the protector 100 shown in FIG. 2 from at least a direction different from the direction of the axis O (for example, a direction orthogonal to the axis O), and the gas separation chamber 119 from the outer introduction hole 170 of the outer protector 110. Introduced in. At this time, relatively heavy water (water droplets) contained in the exhaust gas and relatively light gas components are separated.
- the outer introduction hole 170 is formed at a position closer to the tip side than the formation position of the inner introduction hole 125 of the inner protector 120 in the axis O direction, and is formed along the circumferential direction of the peripheral wall 112 of the outer protector 110. Therefore, it is possible to prevent water droplets that have entered the gas separation chamber 119 from the outer introduction hole 170 from entering the gas detection chamber 129 from the inner introduction hole 125 of the inner protector 120. Further, since the plurality of outer introduction holes 170 are formed in a predetermined length along the circumferential direction of the peripheral wall 112 of the outer protector 110, the amount of exhaust gas entering the gas separation chamber 119 from the outer introduction hole 170 is sufficient. Therefore, the response of the detection value to the exhaust gas of the detection element 10 is not delayed.
- the gas sensor 1 of the second embodiment is different from the first embodiment only in the structure of the outer introduction hole 170 of the outer protector 110 from the first embodiment, and the other structures are the same. Only different points will be described below.
- outer introduction hole 170 of the outer protector 110 of the second embodiment a plurality of outer introduction holes 170 that communicate the outside of the outer protector 110 and the gas separation chamber 119 are formed in the peripheral wall 112 along the circumferential direction.
- the outer introduction hole 170 extends in the circumferential direction of the peripheral wall 112 and has a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction.
- the outer introduction holes 170 are formed in two rows on the peripheral wall 112 in the axis O direction.
- the end portions of one outer introduction hole 170 are arranged on the peripheral wall 112 at equal intervals in the circumferential direction so as to overlap the other outer introduction hole 170. Further, all the outer introduction holes 170 are formed at positions on the distal end side with respect to the formation position of the inner introduction hole 125 of the inner protector 120 in the axis O direction. That is, the position of the rear end of the outer introduction hole 170 is arranged on the front end side with respect to the position of the front end of the inner introduction hole 125.
- the outer protector 110 of the second embodiment in addition to the effects of the second embodiment, two rows are formed on the peripheral wall 112 of the outer protector 110 in the axis O direction, and the end of one outer introduction hole 170 is formed. Since the peripheral wall 112 is arranged at equal intervals in the circumferential direction so as to overlap the other outer introduction hole 170, the amount of exhaust gas entering the gas separation chamber 119 from these outer introduction holes 170 is sufficient, The response of the detection value to the exhaust gas of the detection element 10 is not delayed. In addition, all the outer introduction holes 170 are formed in positions closer to the tip side than the formation position of the inner introduction hole 125 of the inner protector 120 in the direction of the axis O, and therefore enter the gas separation chamber 119 from the outer introduction hole 170.
- the rotation angle of the attachment of the gas sensor 1 to the exhaust passage is not limited.
- the gas sensor 1 of the third embodiment is different from the first embodiment only in the structure of the outer introduction hole 170 of the outer protector 110 from the first embodiment, and the other structures are the same. Only different points will be described below.
- a plurality of outer introduction holes 170 that communicate the outside of the outer protector 110 and the gas separation chamber 119 are formed in the peripheral wall 112 along the circumferential direction.
- the outer introduction hole 170 extends in the circumferential direction of the peripheral wall 112 and has a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction.
- the outer introduction holes 170 are formed in three rows on the peripheral wall 112 in the axis O direction. Further, in the axis O direction, the end of one outer introduction hole 170 is disposed on the peripheral wall 112 so as to overlap the other outer introduction hole 170.
- all the outer introduction holes 170 are formed at positions on the distal end side with respect to the formation position of the inner introduction hole 125 of the inner protector 120 in the axis O direction. That is, the position of the rear end of the outer introduction hole 170 is arranged on the front end side with respect to the position of the front end of the inner introduction hole 125.
- the outer protector 110 of the third embodiment in addition to the effects of the first and second embodiments, three rows are formed on the peripheral wall 112 of the outer protector 110 in the axis O direction, and one of the outer introduction holes 170 is formed. Since the end portions are arranged at equal intervals in the circumferential direction on the peripheral wall 112 so as to overlap the other outer introduction hole 170, the amount of exhaust gas entering the gas separation chamber 119 from these outer introduction holes 170 is sufficient. Therefore, the response of the detection value to the exhaust gas of the detection element 10 is not delayed.
- all the outer introduction holes 170 are formed in positions closer to the tip side than the formation position of the inner introduction hole 125 of the inner protector 120 in the direction of the axis O, and therefore enter the gas separation chamber 119 from the outer introduction hole 170. It is possible to prevent the water droplets from entering the gas detection chamber 129 from the inner introduction hole 125 of the inner protector 120.
- the outer introduction hole 170 is provided over the entire circumference of the peripheral wall 112 of the outer protector 110, the rotation angle of the attachment of the gas sensor 1 to the exhaust passage is not limited.
- FIG. 8 a case will be described in which four outer introduction holes 170 that are horizontally long rectangular lateral holes are formed in a row in the circumferential direction of the peripheral wall 112 of the outer protector 110.
- the outer introduction hole 170 has a rectangular shape when viewed from the front.
- the circumferential length of the peripheral wall 112 of the outer protector 110 is L1 (see FIG. 9).
- outer introduction holes 170 which are rectangular lateral holes which are horizontally long when viewed from the front are formed in two rows in the circumferential direction of the peripheral wall 112 of the outer protector 110.
- the circumferential length of the peripheral wall 112 of the outer protector 110 is L1 (see FIG. 9).
- the individual length in the circumferential direction of the peripheral wall 112 of the outer introduction hole 170 is M2, and six outer introduction holes are provided.
- L2 M2 ⁇ 6.
- L2 / L1 0.66.
- the length in the circumferential direction of one outer introduction hole 170 of the outer protector 110 is L3, the length in the axis O direction is L4, and the length of the outer introduction hole 170 with respect to the vertical length
- the ratio of the horizontal length is L3 / L4.
- the horizontal hole corresponds to either “L2 / L1 ⁇ 0.52” or “L3 / L4 ⁇ 3”.
- the outer introduction hole 170 is formed in the peripheral wall 112 of the outer protector 110 so as to correspond to either “L2 / L1 ⁇ 0.52” or “L3 / L4 ⁇ 3”.
- the outer protector 110 of the first comparative example is a prior art outer protector having an outer introduction hole 170 having a conventional shape.
- eight outer introduction holes 170 are formed in the peripheral wall 112 of the outer protector 110 at regular intervals along the circumferential direction.
- the outer introduction hole 170 is formed at a position closer to the tip side than the formation position of the inner introduction hole 125 of the inner protector 120 in the axis O direction.
- the outer introduction hole 170 is formed in a vertical hole shape in which the opening length in the direction (axis O direction) perpendicular to the circumferential direction is larger than the opening length in the circumferential direction of the peripheral wall 112.
- the outer introduction hole 170 of the outer protector 110 of the second comparative example has an opening length in the circumferential direction of the peripheral wall 112 that is narrower than that of the first comparative example. That is, the outer introduction hole 170 of the second comparative example is formed to be longer than that of the first comparative example.
- the outer introduction hole 170 of the outer protector 110 of the third comparative example has an opening length in the circumferential direction of the peripheral wall 112 smaller than that of the first comparative example, and the length in the axis O direction is the same as that of the first comparative example and the first comparative example. It is longer than the two comparative examples. That is, the outer introduction hole 170 of the third comparative example is formed to be longer than that of the first comparative example and the second comparative example.
- the total opening area of all the outer introduction holes 170 of the outer protector 110 of the first comparative example is set to 1, and the total opening area of all the outer introduction holes 170 of the outer protector 110 of the first embodiment is calculated.
- the total opening area of all the outer introduction holes 170 of the outer protector 110 of the second embodiment is set to “0.5”, and the outer protector of the third embodiment introduces all the outer introductions.
- the total opening area of the holes 170 is set to “0.8”.
- the total opening area of all the outer introduction holes 170 is set to “0.5”
- the total opening area of all the outer introduction holes 170 is set. Is “0.8”.
- the response of the detection element 10 (relation between the element gas replacement ratio and time (seconds)) was simulated by a computer. The result of the first analysis simulation is shown in the graph of FIG.
- the second comparative example has the worst response.
- the responsiveness of the first comparative example and the third comparative example is poor.
- the third embodiment had the best response, and then the first embodiment and the second embodiment had good response. Therefore, it has been found that high responsiveness can be obtained even if the outer introduction hole 170 is made a horizontal hole and the opening area is made smaller than the vertical introduction hole 170 as in the prior art.
- outer introduction hole 170 of the outer protector 110 a plurality of outer introduction holes 170 that communicate the outside of the outer protector 110 and the gas separation chamber 119 are formed in the peripheral wall 112 along the circumferential direction.
- the outer introduction hole 170 extends in the circumferential direction of the peripheral wall 112 and has a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction.
- Four outer introduction holes 170 are formed in a row in the circumferential direction of the peripheral wall 112. As shown in FIG.
- the circumferential length of the peripheral wall 112 of each outer introduction hole 170 is M2
- the circumferential length of the peripheral wall 112 is L1
- L2 M2 ⁇ 4.
- the opening ratio L2 / L1 0.83 in the circumferential direction of the peripheral wall 112 is set.
- outer introduction hole 170 of the outer protector 110 a plurality of outer introduction holes 170 that communicate the outside of the outer protector 110 and the gas separation chamber 119 are formed in the peripheral wall 112 along the circumferential direction.
- the outer introduction hole 170 extends in the circumferential direction of the peripheral wall 112 and has a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction.
- the three outer introduction holes 170 are formed in a line in the circumferential direction of the peripheral wall 112, the opening length in the circumferential direction is not so large. As shown in FIG.
- the circumferential length of the peripheral wall 112 of each outer introduction hole 170 is M2
- the circumferential length of the peripheral wall 112 is L1
- L2 M2 ⁇ 3.
- the opening ratio L2 / L1 0.30 in the circumferential direction of the peripheral wall 112 is set.
- the first comparative example has the worst response.
- the fifth embodiment had the best response and then the fourth embodiment was good. Therefore, if the ratio (L2 / L1) of the holes in the circumferential direction of the peripheral wall 112 of the outer protector 110 is 0.30 (30%) or more, it can be determined that the response of the detection element 10 does not deteriorate.
- a plurality of outer introduction holes 170 that communicate the outside of the outer protector 110 and the gas separation chamber 119 are formed in the peripheral wall 112 along the circumferential direction.
- the outer introduction hole 170 extends in the circumferential direction of the peripheral wall 112 and has a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction.
- the outer introduction holes 170 are formed in two rows on the peripheral wall 112 in the axis O direction.
- the end portions of one outer introduction hole 170 are arranged on the peripheral wall 112 at equal intervals in the circumferential direction so as to overlap the other outer introduction hole 170. Further, all the outer introduction holes 170 are formed at positions closer to the tip side than the formation position of the inner introduction hole 125 of the inner protector 120 in the axis O direction. That is, the position of the rear end of the outer introduction hole 170 is arranged on the front end side with respect to the position of the front end of the inner introduction hole 125.
- inner introduction holes 125 which are twelve circular holes, are opened along the circumferential direction at a position near the base end 121 in the axis O direction.
- the inner introduction hole 125 mainly contains the gas component of the exhaust gas introduced into the gas separation chamber 119 via the outer introduction hole 170 of the outer protector 110, that is, the detection unit 11 of the detection element 10. Is a hole for introduction into the exposed gas detection chamber 129.
- six inner introduction holes 125 are formed in the circumferential wall 112 in six rows in the circumferential direction and in the axis O direction.
- the diameter of one inner introduction hole 125 is 1.5 mm, which is twelve, and the total area of the openings of the inner introduction holes 125 is 21.2 mm 2 .
- the inner protector 120 of the sixth embodiment Since the outer protector 110 of the sixth embodiment has the same structure as that of the fourth comparative example, the description thereof is omitted.
- a plurality of inner introduction holes 125 are opened along the circumferential direction at a position near the base end 121 in the axis O direction.
- the inner introduction hole 125 extends in the circumferential direction of the peripheral wall 122 and is formed in a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction.
- the inner introduction holes 125 are formed in two rows on the peripheral wall 122 in the axis O direction.
- one inner introduction hole 125 has a width of 0.6 mm in the direction of the axis O, and opens at 70 degrees about the axis O in a plane orthogonal to the axis O. Since the three openings are formed in two rows, the total area of the openings of the inner introduction holes 125 of the sixth embodiment is 16.7 mm 2 . Accordingly, the ratio of the area of the opening (21.2 mm 2 ) of the inner introduction hole 125 of the fourth comparative example to the total is 0.79.
- the inner protector 120 of the seventh embodiment Since the outer protector 110 of the seventh embodiment has the same structure as that of the fourth comparative example, the description thereof is omitted.
- a plurality of inner introduction holes 125 are opened along the circumferential direction at a position near the base end 121 in the axis O direction.
- the inner introduction hole 125 extends in the circumferential direction of the peripheral wall 122 and is formed in a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction.
- the inner introduction holes 125 are formed in two rows on the peripheral wall 122 in the axis O direction.
- the inner introduction holes 125 are arranged in the circumferential wall 122 at equal intervals in the circumferential direction, and the formation positions are shifted vertically.
- one inner introduction hole 125 has a width of 0.6 mm in the direction of the axis O, and opens at 45 degrees about the axis O in a plane orthogonal to the axis O. Since the three openings are formed in two rows, the total area of the openings of the inner introduction holes 125 of the sixth embodiment is 10.7 mm 2 . Therefore, the ratio with respect to the total area (21.2 mm 2 ) of the openings of the inner introduction holes 125 of the fourth comparative example is 0.51.
- the inner protector 120 of the eighth embodiment will be described with reference to FIG. Since the outer protector 110 of the eighth embodiment has the same structure as that of the fourth comparative example, the description thereof is omitted.
- a plurality of inner introduction holes 125 are opened along the circumferential direction at a position near the base end 121 in the axis O direction.
- the inner introduction hole 125 extends in the circumferential direction of the peripheral wall 122 and is formed in a lateral hole shape in which the opening length in the circumferential direction is larger than the opening length in the direction orthogonal to the circumferential direction.
- the inner introduction holes 125 are formed at equal intervals in one row in the circumferential direction of the peripheral wall 122.
- one inner introduction hole 125 has a width of 0.6 mm in the direction of the axis O, and opens at 70 degrees about the axis O in a plane orthogonal to the axis O. Since the four openings are formed in one row, the total area of the openings of the inner introduction holes 125 of the eighth embodiment is 11.1 mm 2 . Therefore, the ratio of the area (21.2 mm 2 ) of the opening portion of the inner introduction hole 125 of the fourth comparative example to the total is 0.53.
- the result of the third analysis simulation of the responsiveness of the gas sensor 1 will be described with reference to FIG.
- the response of the detection element 10 (relationship between the element gas replacement ratio and time (seconds)) is simulated by a computer using the fourth comparative example and the sixth to eighth embodiments. went.
- the protector 100 is an example of the “protector” of the present invention
- the outer protector 110 is an example of the “outer protector” of the present invention
- the inner protector 120 is an example of the “inner protector” in the present invention.
- the outer introduction hole 170 is an example of the “introduction hole formed in the outer protector” of the present invention.
- the gas separation chamber 119 is an example of the “gap” and “gas flow path” of the present invention.
- the present invention is not limited to the above embodiment, and various modifications can be made.
- the outer introduction hole 170 is not limited to a simple horizontal hole as shown in FIG. 2, and a plurality of small rectangular holes 171 are continuously provided in the circumferential direction of the peripheral wall 112 of the outer protector 110 as shown in FIG. 26. It may be a hole 170 corresponding to a lateral hole formed as described above. In this case, the strength of the portion of the outer introduction hole 170 is not lowered, and the introduction efficiency of the exhaust gas into the outer protector 110 is not lowered. Further, it is possible to reliably prevent the detection element 10 from being wetted. Accordingly, it is possible to prevent the detection element 10 from being damaged due to water droplets adhering to the detection element 10.
- the number of outer introduction holes 170 is not limited to the above embodiment, and may be an appropriate number.
- the present invention can be similarly applied to protectors used for oxygen sensors, NOx sensors, HC sensors, temperature sensors and the like.
Abstract
Description
側導入孔が形成された内側プロテクタと、前記内側プロテクタとの間に空隙を有しつつ、少なくとも前記内側プロテクタの前記周壁を取り囲む円筒状をなし、自身の周壁に前記被検出ガスを前記空隙に導入するための外側導入孔が形成された外側プロテクタとから構成され、前記外側導入孔は、前記横孔形状の孔部、及び、前記横孔相当の孔部の少なくとも一つから構成され、前記内側導入孔に対向する位置以外の前記外側プロテクタの周壁に前記外側導入孔が設けられているようにしてもよい。
10 検出素子
11 検出部
50 主体金具
56 先端係合部
100 プロテクタ
110 外側プロテクタ
112 周壁
119 ガス分離室
120 内側プロテクタ
122 周壁
125 内側導入孔
129 ガス検出室
125 内側導入孔
170 外側導入孔
171 孔
Claims (9)
- 軸線方向に延び、先端側に被検出ガス中の特定ガス成分を検出するための検出部を有する検出素子と、
前記検出部を自身の先端部から突出させた状態で、前記検出素子の径方向周囲を取り囲んで保持する主体金具と、
周壁およびその先端側に先端壁を有し、自身の内部に前記検出部を収容した状態で、基端側の開口端部が前記主体金具の前記先端部に固定されると共に、前記周壁に前記被検出ガスを自身の内部に導入するための導入孔が形成された一又は空隙を有して複数重ねられたプロテクタとを備え、
前記プロテクタに形成された前記導入孔は、前記周壁の周方向に複数設けられ、前記周方向における開口長さが前記周方向と直交する方向における開口長さより大きい横孔形状であることを特徴とするガスセンサ。 - 軸線方向に延び、先端側に被検出ガス中の特定ガス成分を検出するための検出部を有する検出素子と、
前記検出部を自身の先端部から突出させた状態で、前記検出素子の径方向周囲を取り囲んで保持する主体金具と、
周壁およびその先端側に先端壁を有し、自身の内部に前記検出部を収容した状態で、基端側の開口端部が前記主体金具の前記先端部に固定されると共に、前記周壁に前記被検出ガスを自身の内部に導入するための導入孔が形成された一又は空隙を有して複数重ねられたプロテクタとを備え、
前記プロテクタに形成された前記導入孔は、前記周壁の周方向に複数設けられた孔部であり、
一つの当該孔部は、前記周方向における開口長さが前記周方向と直交する方向における開口長さより小さい縦孔形状の孔部を複数前記周方向に近接させて形成した横孔相当の孔部であることを特徴とするガスセンサ。 - 前記プロテクタの周壁の外周長さをL1とし、
前記プロテクタの周壁を軸線方向に対して垂直な面に投影した場合の前記導入孔の周方向の長さの合計をL2とした場合に、
L2/L1が0.3以上であることを特徴とする請求項1または2に記載のガスセンサ。 - L2/L1が0.52以上であることを特徴とする請求項3に記載のガスセンサ。
- 前記プロテクタの周壁の周方向における前記導入孔の長さをL3、当該L3と直交する方向における前記導入孔の長さをL4とした場合に、
L3/L4が3以上であることを特徴とする請求項1乃至4の何れかに記載のガスセンサ。 - 前記プロテクタを前記軸線方向と直交し且つ前記導入孔を通る平面で切断した円断面を、その中心を通る直線により複数分割した場合に、当該分割した各領域に前記導入孔が少なくとも一つ存在することを特徴とする請求項1乃至5の何れかに記載のガスセンサ。
- 前記プロテクタは、周壁およびその先端側に先端壁を有し、自身の内部に前記検出部を収容した状態で、基端側の開口端部が前記主体金具の前記先端部に固定されると共に、前記周壁に前記被検出ガスを自身の内部に導入するための内側導入孔が形成された内側プロテクタと、
前記内側プロテクタとの間に空隙を有しつつ、少なくとも前記内側プロテクタの前記周壁を取り囲む円筒状をなし、自身の周壁に前記被検出ガスを前記空隙に導入するための外側導入孔が形成された外側プロテクタとから構成され、
前記外側導入孔は、前記横孔形状の孔部、及び、前記横孔相当の孔部の少なくとも一つから構成され、
前記内側導入孔に対向する位置以外の前記外側プロテクタの周壁に前記外側導入孔が設けられていることを特徴とする請求項1乃至6の何れかに記載のガスセンサ。 - 前記外側導入孔は、前記外側プロテクタの周壁において、最基端側にある前記内側導入孔よりも前記軸線方向の先端側に設けられていることを特徴とする請求項7に記載のガスセンサ。
- 前記外側導入孔は、前記外側プロテクタの周壁において、前記軸線方向に複数設けられていることを特徴とする請求項7又は8に記載のガスセンサ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112013002429.2T DE112013002429B4 (de) | 2012-05-11 | 2013-04-30 | Gas Sensor |
JP2014514705A JP6158792B2 (ja) | 2012-05-11 | 2013-04-30 | ガスセンサ |
US14/074,861 US9733207B2 (en) | 2012-05-11 | 2013-11-08 | Gas sensor |
US15/170,845 US9995707B2 (en) | 2012-05-11 | 2016-06-01 | Gas sensor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012109860 | 2012-05-11 | ||
JP2012-109860 | 2012-05-11 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/074,861 Continuation-In-Part US9733207B2 (en) | 2012-05-11 | 2013-11-08 | Gas sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013168649A1 true WO2013168649A1 (ja) | 2013-11-14 |
Family
ID=49550691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/062664 WO2013168649A1 (ja) | 2012-05-11 | 2013-04-30 | ガスセンサ |
Country Status (4)
Country | Link |
---|---|
US (2) | US9733207B2 (ja) |
JP (1) | JP6158792B2 (ja) |
DE (1) | DE112013002429B4 (ja) |
WO (1) | WO2013168649A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015090274A (ja) * | 2013-11-05 | 2015-05-11 | 日本特殊陶業株式会社 | ガスセンサ |
CN104914220A (zh) * | 2015-06-28 | 2015-09-16 | 哈尔滨东方报警设备开发有限公司 | 一种防爆传感器防护罩 |
US9733207B2 (en) | 2012-05-11 | 2017-08-15 | Ngk Spark Plug Co., Ltd. | Gas sensor |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6904881B2 (ja) * | 2017-10-27 | 2021-07-21 | 日本特殊陶業株式会社 | ガスセンサ |
JP7114507B2 (ja) * | 2019-02-22 | 2022-08-08 | 日本特殊陶業株式会社 | センサ |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5848846A (ja) * | 1981-09-17 | 1983-03-22 | Matsushita Electric Ind Co Ltd | 酸素濃度センサ |
JPS5891154U (ja) * | 1981-12-14 | 1983-06-20 | 松下電器産業株式会社 | 酸素濃度センサ |
JPS60233542A (ja) * | 1984-05-03 | 1985-11-20 | Ngk Insulators Ltd | 酸素分圧測定装置 |
JPS6387559U (ja) * | 1986-11-28 | 1988-06-07 | ||
JPS6423661U (ja) * | 1987-07-31 | 1989-02-08 | ||
JPH02148464U (ja) * | 1989-05-18 | 1990-12-17 | ||
JPH10253576A (ja) * | 1997-03-10 | 1998-09-25 | Toyota Motor Corp | 酸素センサ |
JP2003043002A (ja) * | 2001-07-31 | 2003-02-13 | Ngk Spark Plug Co Ltd | ガスセンサ |
JP2004109125A (ja) * | 2002-08-27 | 2004-04-08 | Ngk Spark Plug Co Ltd | ガスセンサ |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5848846B2 (ja) | 1981-08-14 | 1983-10-31 | 株式会社 石田衡器製作所 | 計量方式 |
JPH10253577A (ja) | 1997-03-11 | 1998-09-25 | Toyota Motor Corp | 酸素センサ |
JP3518796B2 (ja) * | 1998-07-07 | 2004-04-12 | 日本特殊陶業株式会社 | ガスセンサ |
US6346179B1 (en) * | 1998-08-05 | 2002-02-12 | Ngk Spark Plug Co., Ltd. | Gas sensor |
DE10052005C2 (de) | 2000-10-20 | 2002-11-21 | Bosch Gmbh Robert | Meßfühler für Gase |
EP1541999B1 (en) | 2002-08-27 | 2013-12-11 | NGK Spark Plug Co., Ltd. | Gas sensor |
JP4173465B2 (ja) | 2003-06-27 | 2008-10-29 | 日本特殊陶業株式会社 | センサの製造方法 |
CN100416265C (zh) | 2003-06-27 | 2008-09-03 | 日本特殊陶业株式会社 | 传感器的制造方法和传感器 |
JP2007271517A (ja) * | 2006-03-31 | 2007-10-18 | Denso Corp | ガスセンサ |
JP4725494B2 (ja) * | 2006-04-27 | 2011-07-13 | 株式会社デンソー | ガスセンサ |
JP2008058297A (ja) * | 2006-08-04 | 2008-03-13 | Ngk Spark Plug Co Ltd | ガスセンサ |
JP5069941B2 (ja) * | 2006-09-14 | 2012-11-07 | 日本特殊陶業株式会社 | ガスセンサ |
US7827849B2 (en) * | 2006-11-02 | 2010-11-09 | Ngk Spark Plug Co., Ltd. | Gas sensor |
DE102007016976B4 (de) * | 2007-04-10 | 2021-07-29 | Bayerische Motoren Werke Aktiengesellschaft | Schutzkappe für einen Gassensor sowie Gassensor |
JP5098539B2 (ja) * | 2007-09-27 | 2012-12-12 | トヨタ自動車株式会社 | ガスセンサの取付構造 |
JP5141647B2 (ja) | 2009-07-15 | 2013-02-13 | 三菱自動車工業株式会社 | センサ素子への排ガスガイド装置及びエンジンの排気系構造 |
JP2011145145A (ja) | 2010-01-14 | 2011-07-28 | Ngk Spark Plug Co Ltd | ガスセンサ |
JP5373837B2 (ja) | 2011-03-08 | 2013-12-18 | 日本特殊陶業株式会社 | ガスセンサ素子及びガスセンサ |
JP5993782B2 (ja) * | 2012-04-17 | 2016-09-14 | 日本特殊陶業株式会社 | ガスセンサ |
DE112013002429B4 (de) | 2012-05-11 | 2023-11-02 | Ngk Spark Plug Co., Ltd. | Gas Sensor |
-
2013
- 2013-04-30 DE DE112013002429.2T patent/DE112013002429B4/de active Active
- 2013-04-30 JP JP2014514705A patent/JP6158792B2/ja active Active
- 2013-04-30 WO PCT/JP2013/062664 patent/WO2013168649A1/ja active Application Filing
- 2013-11-08 US US14/074,861 patent/US9733207B2/en active Active
-
2016
- 2016-06-01 US US15/170,845 patent/US9995707B2/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5848846A (ja) * | 1981-09-17 | 1983-03-22 | Matsushita Electric Ind Co Ltd | 酸素濃度センサ |
JPS5891154U (ja) * | 1981-12-14 | 1983-06-20 | 松下電器産業株式会社 | 酸素濃度センサ |
JPS60233542A (ja) * | 1984-05-03 | 1985-11-20 | Ngk Insulators Ltd | 酸素分圧測定装置 |
JPS6387559U (ja) * | 1986-11-28 | 1988-06-07 | ||
JPS6423661U (ja) * | 1987-07-31 | 1989-02-08 | ||
JPH02148464U (ja) * | 1989-05-18 | 1990-12-17 | ||
JPH10253576A (ja) * | 1997-03-10 | 1998-09-25 | Toyota Motor Corp | 酸素センサ |
JP2003043002A (ja) * | 2001-07-31 | 2003-02-13 | Ngk Spark Plug Co Ltd | ガスセンサ |
JP2004109125A (ja) * | 2002-08-27 | 2004-04-08 | Ngk Spark Plug Co Ltd | ガスセンサ |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9733207B2 (en) | 2012-05-11 | 2017-08-15 | Ngk Spark Plug Co., Ltd. | Gas sensor |
US9995707B2 (en) | 2012-05-11 | 2018-06-12 | Ngk Spark Plug Co., Ltd. | Gas sensor |
JP2015090274A (ja) * | 2013-11-05 | 2015-05-11 | 日本特殊陶業株式会社 | ガスセンサ |
CN104914220A (zh) * | 2015-06-28 | 2015-09-16 | 哈尔滨东方报警设备开发有限公司 | 一种防爆传感器防护罩 |
Also Published As
Publication number | Publication date |
---|---|
DE112013002429T5 (de) | 2015-02-26 |
DE112013002429B4 (de) | 2023-11-02 |
US20160274053A1 (en) | 2016-09-22 |
JPWO2013168649A1 (ja) | 2016-01-07 |
US20140138245A1 (en) | 2014-05-22 |
US9995707B2 (en) | 2018-06-12 |
JP6158792B2 (ja) | 2017-07-05 |
US9733207B2 (en) | 2017-08-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7607340B2 (en) | Gas sensor | |
US7870777B2 (en) | Gas sensor | |
JP6276662B2 (ja) | ガスセンサ | |
US7758736B2 (en) | Gas sensor | |
JP6454559B2 (ja) | ガスセンサ | |
JP4838871B2 (ja) | ガスセンサ | |
JP5993782B2 (ja) | ガスセンサ | |
WO2013168649A1 (ja) | ガスセンサ | |
JP5022170B2 (ja) | ガスセンサ | |
US7827849B2 (en) | Gas sensor | |
US10371680B2 (en) | Sensor | |
US10775342B2 (en) | Gas sensor | |
JP6086855B2 (ja) | ガスセンサ | |
JP2011145235A (ja) | ガスセンサ | |
JP5767271B2 (ja) | ガスセンサ | |
JP5844686B2 (ja) | ガスセンサ | |
JP2012002747A (ja) | ガスセンサ | |
JP2014235025A (ja) | ガスセンサ | |
JP4938588B2 (ja) | ガスセンサ | |
JP2011022099A (ja) | センサユニット | |
JP2009042052A (ja) | ガスセンサ | |
JP2008116273A (ja) | ガスセンサ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13787006 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2014514705 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112013002429 Country of ref document: DE Ref document number: 1120130024292 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13787006 Country of ref document: EP Kind code of ref document: A1 |