JP2002161740A - Setting method for o2 sensor of catalyst converter - Google Patents
Setting method for o2 sensor of catalyst converterInfo
- Publication number
- JP2002161740A JP2002161740A JP2000361782A JP2000361782A JP2002161740A JP 2002161740 A JP2002161740 A JP 2002161740A JP 2000361782 A JP2000361782 A JP 2000361782A JP 2000361782 A JP2000361782 A JP 2000361782A JP 2002161740 A JP2002161740 A JP 2002161740A
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- cylinder
- tubular member
- sensor
- outer cylinder
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、車両排気系等に
装着される触媒コンバータのＯ２センサー取付方法に関
し、特に内筒と外筒とを有しそれらの間に空間が設けら
れて二重筒構造をなす触媒コンバータのＯ２センサー取
付方法に関する。TECHNICAL FIELD The present invention relates to O 2 sensor mounting method of catalytic converters to be worn by a vehicle exhaust system, etc., a space is provided between them and a inner cylinder and the outer cylinder in particular double The present invention relates to a method for mounting an O 2 sensor on a catalytic converter having a cylindrical structure.
【０００２】[0002]
【従来の技術】車両排気系等に装着される触媒コンバー
タとして、遮熱性および遮音性を高めるために、触媒を
保持する内筒とその外側に備えられた外筒との両端部同
士を接合させ、それらの間に閉塞された空間を形成して
二重筒構造とした触媒コンバータが知られている。2. Description of the Related Art As a catalytic converter mounted on a vehicle exhaust system or the like, both ends of an inner cylinder holding a catalyst and an outer cylinder provided outside thereof are joined together in order to enhance heat insulation and sound insulation. There is known a catalytic converter having a double cylinder structure by forming a closed space between them.
【０００３】近年、米国ではＯＢＤ−II（略称）と呼ば
れ自動車の排気ガス制御装置に関するオンボード故障診
断が義務づけられ、その対応として触媒コンバータの前
後と中間部分とにそれぞれセンサーを取り付けることが
必要となった。[0003] In recent years, in the United States, OBD-II (abbreviation) has been required to perform on-board failure diagnosis for exhaust gas control devices for automobiles, and it is necessary to attach sensors to the front, rear, and intermediate portions of the catalytic converter in response to this. It became.
【０００４】前記二重筒構造の触媒コンバータの中間部
分にセンサーを取り付ける際には、内筒と外筒との側部
にそれぞれセンサーを内筒内に挿入する挿入孔を設け、
これら両挿入孔の内周縁部に筒体状をなすセンサー取付
ボスの外周部を全周に亘ってそれぞれ溶接して固着し、
このセンサー取付ボスにセンサーを取り付けることによ
って前記センサーは内筒内に配置させることが考えられ
る。このとき、センサーを安定させて取り付けるために
は、センサー取付ボスに十分な剛性とその固定部に十分
な強度が要求される。このため、センサー取付ボスは鋼
材等の高剛性部材で形成される。そして、このセンサー
取付ボスを内筒の側周面に形成された貫通孔に溶接固定
し、この内筒を外筒内に挿入し外筒の側周面に形成され
た貫通孔と前記センサー取付ボスとを位置あわせして溶
接固定する。さらに、内筒と外筒との両端部同士を接合
して両者の間に閉塞された空間を形成する。[0004] When the sensor is mounted on the intermediate portion of the double-tube catalytic converter, insertion holes for inserting the sensor into the inner cylinder are provided on side portions of the inner cylinder and the outer cylinder, respectively.
The outer peripheral portions of the cylindrical sensor mounting bosses are welded and fixed to the inner peripheral edges of these two insertion holes over the entire circumference,
It is conceivable that the sensor is arranged in the inner cylinder by attaching the sensor to the sensor attachment boss. At this time, in order to mount the sensor stably, sufficient rigidity of the sensor mounting boss and sufficient strength of the fixing portion are required. For this reason, the sensor mounting boss is formed of a highly rigid member such as a steel material. Then, the sensor mounting boss is welded and fixed to a through hole formed on the side peripheral surface of the inner cylinder, and the inner cylinder is inserted into the outer cylinder, and the through hole formed on the side peripheral surface of the outer cylinder is connected to the sensor mounting boss. Align with the boss and fix by welding. Furthermore, both ends of the inner cylinder and the outer cylinder are joined to form a closed space between the two.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来のＯ２センサー取付方法は、高剛性部材で形成された
センサー取付ボスをいずれも高剛性部材でなる内筒と外
筒とにとそれぞれ固着させてそれらの間に閉塞された空
間を形成するため、センサー取付ボス、内筒、外筒のい
ずれにも高い寸法精度が要求される。また、内筒に固着
されたセンサー取付ボスと外筒の貫通孔との位置合わせ
および固着作業にも高い精度が要求されるため手間と時
間のかかる製造作業が余儀なくされるという課題があっ
た。[SUMMARY OF THE INVENTION However, the conventional O 2 sensor mounting method, by fixing respectively the sensor mounting boss formed of a high rigid member to the inner cylinder and an outer cylinder made of a highly rigid member either Therefore, high dimensional accuracy is required for each of the sensor mounting boss, the inner cylinder, and the outer cylinder to form a closed space between them. In addition, there is a problem that high precision is required for the positioning and fixing work between the sensor mounting boss fixed to the inner cylinder and the through-hole of the outer cylinder, which necessitates a time-consuming and time-consuming manufacturing operation.
【０００６】本発明は前記従来の課題に鑑み、触媒コン
バータに容易に取り付けることができる触媒コンバータ
のＯ２センサー取付方法を提供することを目的とする。The present invention aims to provide an O 2 sensor mounting method of catalytic converter can be attached the light of the conventional problems, easily to the catalytic converter.
【０００７】[0007]
【課題を解決するための手段】かかる目的を達成するた
めに本発明の触媒コンバータのＯ２センサー取付構造
は、触媒を保持する内筒とその外側に配置された外筒と
の間に空間が形成された触媒コンバータのＯ２センサー
取付方法であって、内筒の側周部にその内外を連通する
内筒孔を形成し、前記内筒の内部に触媒を挿入した後に
内筒を縮径して触媒を保持させ、その外周面側に伸縮可
能な管状部材の一端側をその管内と内筒内とが前記内筒
孔を通して連通するように固定する内筒組立・加工工程
と、外筒の側周部にその内外を連通する外筒孔を形成
し、この外筒内に前記内筒を挿入する内筒挿入工程と、
前記外筒の両端部を縮径してその少なくとも一方を内筒
に対して相対変位可能に両端部を接合するとともに、前
記管状部材を伸長させその自由端側を外筒の外筒孔から
外側に引き出す内筒と外筒との接合工程と、前記管状部
材に管状をなすセンサー取付具を両者の管内が連通する
ように結合するセンサー取付具と管状部材の結合工程
と、前記管状部材を短小化して前記センサー取付具を外
筒に固定して内筒内と外筒外とを連通させるとともに内
筒と外筒との間の空間を閉塞する閉塞空間形成工程と、
前記Ｏ２センサーを内筒内に位置させて前記センサー取
付具に固定することによって内筒内の空間を閉塞するＯ
２センサー取付工程とからなることを特徴とする。O 2 sensor mounting structure for a catalytic converter of the present invention to achieve [SUMMARY OF Such object is a space between the cylinder and the outer cylinder disposed outside the inner for holding the catalyst a O 2 sensor mounting method of the formed catalytic converter, to form a cylindrical inner hole for communicating the inside and outside in the side periphery of the inner cylinder, diameter of inner tube after inserting a catalyst into the interior of the inner tube An inner cylinder assembling / working step of fixing one end of an expandable and contractible tubular member on its outer peripheral surface so that the inside of the tube and the inside of the inner cylinder communicate with each other through the inner cylinder hole. An inner cylinder insertion step of forming an outer cylinder hole communicating the inner and outer sides of the inner cylinder, and inserting the inner cylinder into the outer cylinder,
Both ends of the outer cylinder are reduced in diameter and at least one of them is joined to both ends so as to be relatively displaceable with respect to the inner cylinder, and the tubular member is extended so that its free end is located outside the outer cylinder hole of the outer cylinder. Joining the inner tube and the outer tube to each other, connecting the sensor member with the tubular member to the tubular member so that the insides of the two tubes communicate with each other, and shortening the tubular member. A closed space forming step of closing the space between the inner cylinder and the outer cylinder while communicating with the inner cylinder and the outer cylinder by fixing the sensor mounting member to the outer cylinder,
The O 2 sensor is located in the inner cylinder and fixed to the sensor mounting member to close the space in the inner cylinder.
And two sensor mounting steps.
【０００８】即ち、予め管状部材を固定した内筒を外筒
内に挿入し、外筒孔から外側に伸縮可能な管状部材を引
き出して、その管状部材にセンサー取付具を固定するの
で、管状部材を伸長させてその自由端側を外筒の外側に
十分引き出して管状部材とセンサー取付具とを容易にか
つ確実に固定することができる。また管状部材が固定さ
れたセンサー取付具は管状部材の長さを短くして外筒に
固定するので、センサー取付具の長さを内筒と外筒との
間隔に合わせて予め形成しておく必要はなく、さらにセ
ンサー取付具を外筒に固定する際にも、内筒と外筒とを
高精度で位置合わせして保持しておく必要がない。殊
に、内筒と外筒との間の空間は閉塞されていなければな
らないが、内筒とセンサー取付具との間に伸縮可能な管
状部材を介在させたので、管状部材、センサー取付具、
外筒の固定作業がしやすく、それらの間を確実に閉塞す
ることができる。That is, the inner cylinder to which the tubular member is fixed in advance is inserted into the outer cylinder, the tubular member which can be extended and contracted outward from the outer cylinder hole, and the sensor mounting member is fixed to the tubular member. And the free end side thereof is pulled out sufficiently to the outside of the outer cylinder to easily and surely fix the tubular member and the sensor mounting member. Also, since the sensor mounting fixture to which the tubular member is fixed is fixed to the outer cylinder by shortening the length of the tubular member, the length of the sensor mounting fixture is formed in advance in accordance with the distance between the inner cylinder and the outer cylinder. There is no necessity, and even when the sensor fixture is fixed to the outer cylinder, there is no need to align and hold the inner cylinder and the outer cylinder with high accuracy. In particular, the space between the inner cylinder and the outer cylinder must be closed, but since an extendable tubular member is interposed between the inner cylinder and the sensor fixture, the tubular member, the sensor fixture,
The outer cylinder can be easily fixed and the space between them can be reliably closed.
【０００９】さらに、管状部材とセンサー取付具とで連
通される管内はＯ２センサーを取り付けることによって
内筒内を閉塞することができるので、別途管内を閉塞す
るための部材を設ける必要がない。Furthermore, since the tube communicates with the tubular member and the sensor fixture can be closed in the inner tube by attaching the O 2 sensor, it is not necessary to provide a member for closing a separate tube.
【００１０】また、前記管状部材が蛇腹状をなしている
と、単に弾性材等を用いた場合に比べて伸縮量が大きい
ので、管状部材をさらに外筒の外側に引き出すことがで
きるとともに、センサー取付具の取り付け時に管状部材
が外筒内に引っ張られないため取り付け作業がさらに容
易になる。When the tubular member has a bellows shape, the amount of expansion and contraction is greater than when an elastic material is simply used, so that the tubular member can be further pulled out of the outer cylinder and the sensor can be used. Since the tubular member is not pulled into the outer cylinder when the attachment is attached, the attachment operation is further facilitated.
【００１１】[0011]
【発明の実施の形態】以下、この発明に好適な一実施形
態を図面を用いて詳細に説明する。図１〜７は本発明の
触媒コンバータのＯ２センサー取付方法を示し、図１は
内筒の組立・加工工程を示す断面図、図２は内筒挿入工
程を示す断面図、図３は内筒と外筒との接合工程におい
て外筒の一端部を内筒と接合させた状態を示す断面図、
図４はセンサー取付具と管状部材の結合工程を示す断面
図、図５は閉塞空間形成工程を示す断面図、図６はＯ２
センサー取付工程を示す断面図、図７はＯ２センサーの
取付部を示す拡大断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. Figure 1-7 shows the O 2 sensor mounting method of the catalytic converter of the present invention, FIG. 1 is a sectional view showing the assembly and processing steps of the inner cylinder, cross-sectional view FIG. 2 showing the inner cylinder inserting step, FIG. 3 the inner Sectional view showing a state where one end of the outer cylinder is joined to the inner cylinder in the joining step of the cylinder and the outer cylinder,
Figure 4 is a sectional view showing a bonding process of the sensor fitting and the tubular member, FIG. 5 is a sectional view showing the closed space formation step, FIG. 6 O 2
FIG. 7 is a cross-sectional view illustrating a sensor mounting process, and FIG. 7 is an enlarged cross-sectional view illustrating a mounting portion of the O 2 sensor.
【００１２】ここでは２つの円柱状をなす触媒要素２６
を円筒状の内筒２０内に間隔を隔てて、その排気方向に
並べて配置した触媒コンバータ３６を例に説明する。Here, two cylindrical catalyst elements 26 are formed.
Will be described by way of an example of a catalytic converter 36 arranged in the cylindrical inner cylinder 20 at intervals and arranged in the exhaust direction.
【００１３】本発明の触媒コンバータのＯ２センサー取
付方法は、内筒組立・加工工程と、内筒挿入工程と、内
筒と外筒との接合工程と、センサー取付具と管状部材の
結合工程と、閉塞空間形成工程と、Ｏ２センサー取付工
程とからなる。[0013] O 2 sensor mounting method of the catalytic converter of the present invention, the inner tube assembly and processing step, an inner cylinder inserting step, a bonding step of the inner cylinder and the outer cylinder, the bonding process of the sensor fitting and tubular member When the closed space formation step, and a O 2 sensor mounting process.
【００１４】前記内筒組立・加工工程は、まず内筒２０
の側周部にその長手方向のほぼ中央に位置させて、この
内筒２０の内外を連通する内筒孔４０を形成する。この
内筒２０内に前記内筒孔４０を挟んでその両側に適宜間
隔を隔てて、側周面に緩衝部材２４を巻き付けた触媒要
素２６を配置し、内筒２０を周知の手段によって縮径加
工する。このとき、内筒２０の両触媒要素２６間を触媒
要素２６の直径より小さく縮径し、内筒２０の両開口部
は各触媒要素２６の外側端部付近から端部方向に向かっ
てそれぞれ徐々に縮径し、これら縮径部によって触媒要
素２６を所定の位置に保持する。また、前記内筒孔４０
は前記触媒要素２６間の縮径部に位置している。縮径し
た両端部の一方には、弾性材でなるシールネット３４を
その外周面に一周巻き付けておく。The above-mentioned inner cylinder assembling / working process firstly includes the inner cylinder 20.
An inner cylinder hole 40 is formed in the side periphery of the inner cylinder 20 at a position substantially at the center in the longitudinal direction to communicate the inside and outside of the inner cylinder 20. A catalyst element 26 having a buffer member 24 wound around a side peripheral surface thereof is disposed at both sides of the inner cylinder hole 40 at appropriate intervals in the inner cylinder 20, and the inner cylinder 20 is reduced in diameter by a known means. Process. At this time, the diameter between the two catalyst elements 26 of the inner cylinder 20 is reduced to be smaller than the diameter of the catalyst element 26, and both openings of the inner cylinder 20 are gradually gradually shifted from near the outer end of each catalyst element 26 toward the end. The catalyst element 26 is held at a predetermined position by these reduced diameter portions. Also, the inner cylinder hole 40
Are located at the reduced diameter portion between the catalyst elements 26. A seal net 34 made of an elastic material is wound around the outer peripheral surface of one of the reduced ends.
【００１５】次に、前記内筒２０の外周面側に、通気性
がない素材を用いて伸縮可能な蛇腹状に形成された管状
部材３８の一方の端部を、その管状部材３８の管内と内
筒２０内とが前記内筒孔４０を通して連通するように溶
着固定する。このとき、管状部材３８はその端部が内筒
孔４０を囲むように配置し、全周に亘って隙間なく内筒
２０に溶着する。Next, on the outer peripheral surface side of the inner cylinder 20, one end of a tubular member 38 formed in a bellows shape which can be extended and contracted using a material having no air permeability is connected to the inside of the tube of the tubular member 38. The inside of the inner cylinder 20 is welded and fixed so as to communicate with the inside of the inner cylinder hole 40. At this time, the tubular member 38 is disposed so that its end portion surrounds the inner cylinder hole 40, and is welded to the inner cylinder 20 without a gap over the entire circumference.
【００１６】前記内筒挿入工程は、まず外筒３０の側周
部にその内外を連通する外筒孔４２を形成し、この外筒
３０内に前記内筒２０を挿入する。In the inner cylinder inserting step, first, an outer cylinder hole 42 for communicating the inside and the outside of the outer cylinder 30 is formed in a side peripheral portion of the outer cylinder 30, and the inner cylinder 20 is inserted into the outer cylinder 30.
【００１７】前記内筒２０は前記接合工程において、外
筒３０と内筒２０とがほぼ同心状をなすように配置し、
外筒孔４２が内筒孔４０の外側に位置するように所定の
治具を用いて保持する。このとき、外筒３０内に前記管
状部材３８を伸長させその自由端を外筒３０の外筒孔４
２から外側に引き出しておく。The inner cylinder 20 is arranged so that the outer cylinder 30 and the inner cylinder 20 are substantially concentric in the joining step.
A predetermined jig is used to hold the outer cylinder hole 42 outside the inner cylinder hole 40. At this time, the tubular member 38 is extended into the outer cylinder 30 and its free end is inserted into the outer cylinder hole 4 of the outer cylinder 30.
Pull out from 2 outside.
【００１８】前記外筒３０の両開口部を内筒２０と同様
に縮径し、その一方の端部は内筒２０の開口に隙間なく
溶接接合し、他方の端部は内筒２０の端部に巻き付けら
れた前記シールネット３４を介して内筒２０に隙間なく
接合する。ここで、シールネット３４は、触媒コンバー
タ３６の両端部にそれぞれ介在させてもよく、外筒３０
と内筒２０との間がこのシールネット３４によって隙間
なく接合されていれば構わない。The two openings of the outer cylinder 30 are reduced in diameter in the same manner as the inner cylinder 20. One end of the outer cylinder 30 is welded to the opening of the inner cylinder 20 without any gap, and the other end is the end of the inner cylinder 20. It is joined to the inner cylinder 20 through the seal net 34 wound around the portion without any gap. Here, the seal nets 34 may be interposed at both ends of the catalytic converter 36, respectively.
It suffices if the seal net 34 and the inner cylinder 20 are joined without any gap.
【００１９】前記センサー取付具と管状部材の結合工程
では、前記管状部材３８の自由端側開孔部を、管状をな
し内周面に雌ねじが形成されたセンサー取付具１６の外
周部にその全周に亘って隙間なく溶着し、両者の管内が
連通するように管状部材３８とセンサー取付具１６とを
結合する。このとき、管状部材３８が蛇腹状をなしてい
るので、管状部材３８を伸長させると、その自由端を外
筒３０の外側に十分引き出すことができる。よって、本
管状部材３８は単に弾性材でなる管状部材を用いた場合
と比べて伸縮量が大きいため、管状部材３８を外筒３０
の外側にさらに長く引き出すことができるとともに、セ
ンサー取付具１６の取り付け時に管状部材３８が外筒３
０内方向に引っ張られないため取り付け作業をさらに容
易にかつ確実に行うことができる。In the step of connecting the sensor mounting member and the tubular member, the opening at the free end of the tubular member 38 is entirely formed on the outer peripheral portion of the sensor mounting member 16 which is tubular and has an internal thread formed on the inner peripheral surface. The tubular member 38 and the sensor attachment 16 are joined so that they are welded over the circumference without any gap and the two tubes communicate with each other. At this time, since the tubular member 38 has a bellows shape, when the tubular member 38 is extended, its free end can be sufficiently pulled out of the outer cylinder 30. Therefore, since the present tubular member 38 has a larger amount of expansion and contraction as compared with the case where a tubular member made of only an elastic material is used, the tubular member 38 is connected to the outer cylinder 30.
And the tubular member 38 is attached to the outer cylinder 3 when the sensor fixture 16 is attached.
Since it is not pulled inward, mounting work can be performed more easily and reliably.
【００２０】前記閉塞空間形成工程では、前記管状部材
３８の両端開孔間の距離を短くするとともにその屈曲し
た部分を外筒３０内に戻し、前記センサー取付具１６の
外周部と外筒３０とをそれらの間に間隙が生じないよう
に全周に亘って溶接固定する。このとき、センサー取付
具１６は外筒３０と直交して内筒２０との間の空間３２
に突出し、内筒２０内と外筒３０外とを連通させるとと
もに内筒２０と外筒３０との間の空間３２を閉塞する。
即ち、センサー取付具１６の長さを内筒２０と外筒３０
との間隔に合わせて予め形成しておく必要はなく、さら
にセンサー取付具１６を外筒３０に固定する際にも、内
筒２０と外筒３０とを高精度で位置合わせして保持して
おく必要がない。殊に、内筒２０とセンサー取付具１６
との間に介在させた管状部材３８が伸縮可能なので、管
状部材３８、センサー取付具１６、外筒３０の固定作業
がしやすくなり、閉塞されていなければならない内筒２
０と外筒３０との間の空間３２を確実に閉塞することが
できる。In the step of forming the closed space, the distance between the openings at both ends of the tubular member 38 is reduced, and the bent portion is returned into the outer cylinder 30. Are fixed by welding over the entire circumference so that no gap is formed between them. At this time, the sensor fixture 16 is perpendicular to the outer cylinder 30 and is in a space 32 between the inner cylinder 20 and the outer cylinder 30.
And makes the inside of the inner cylinder 20 communicate with the outside of the outer cylinder 30 and closes the space 32 between the inner cylinder 20 and the outer cylinder 30.
That is, the length of the sensor attachment 16 is set to the inner cylinder 20 and the outer cylinder 30.
It is not necessary to form the inner cylinder 20 and the outer cylinder 30 with high precision even when the sensor fixture 16 is fixed to the outer cylinder 30 in advance. There is no need to keep it. In particular, the inner cylinder 20 and the sensor fixture 16
Since the tubular member 38 interposed between the inner tube 2 and the inner tube 2 can be expanded and contracted, the fixing operation of the tubular member 38, the sensor fixture 16, and the outer tube 30 can be easily performed, and the inner tube 2 which must be closed.
The space 32 between 0 and the outer cylinder 30 can be reliably closed.
【００２１】最後に前記Ｏ２センサー取付工程におい
て、センサー取付具１６に前記Ｏ２センサー１２を挿入
して内筒２０内に位置させ、Ｏ２センサー１２に形成さ
れた雄ねじ部をセンサー取付具１６に螺合し、締め込む
ことによってセンサー取付具１６の管内を閉止する。即
ち、センサー取付具１６にＯ２センサー１２を取り付け
るだけで内筒２０内の空間を閉塞ことができるととも
に、Ｏ２センサー１２の取り付けをねじにしたので容易
に着脱することができ、製造性やメンテナンス等の作業
性を向上させることができる。Finally, in the O 2 sensor mounting step, the O 2 sensor 12 is inserted into the sensor mounting tool 16 and positioned in the inner cylinder 20, and the male screw portion formed on the O 2 sensor 12 is attached to the sensor mounting tool 16. Then, the inside of the tube of the sensor fixture 16 is closed by screwing. That is, the space in the inner cylinder 20 can be closed by simply attaching the O 2 sensor 12 to the sensor mounting member 16, and the O 2 sensor 12 can be easily attached and detached since the attachment of the O 2 sensor 12 is made by screws. Workability such as maintenance can be improved.
【００２２】本実施形態においては、蛇腹状の管状部材
３８を内筒２０に直交する方向に折り返す形態を示した
が、例えば図８（ａ）（ｂ）に示すような形態であって
も伸縮可能であれば構わない。In this embodiment, the bellows-like tubular member 38 is folded back in the direction perpendicular to the inner cylinder 20. For example, the bellows-like tubular member 38 may be expanded and contracted as shown in FIGS. It does not matter if possible.
【００２３】[0023]
【発明の効果】以上のように、本発明の触媒コンバータ
のＯ２センサー取付方法によれば、管状部材を伸長させ
てその自由端側を外筒の外側に十分引き出すことによっ
て、管状部材とセンサー取付具とを容易にかつ確実に固
定することができる。また、内筒とセンサー取付具との
間の管状部材を伸縮させることができるので、管状部
材、センサー取付具、外筒の加工やそれらの位置合わせ
に高い精度が要求されないため作業性が向上し、内筒と
外筒との間を確実に閉塞することができる。As it is evident from the foregoing description, according to the O 2 sensor mounting method of the catalytic converter of the present invention, by drawing enough outside of the outer cylinder and the free end by extending the tubular member, the tubular member and the sensor The attachment and the fixture can be easily and reliably fixed. In addition, since the tubular member between the inner cylinder and the sensor mounting member can be expanded and contracted, high accuracy is not required for processing and positioning of the tubular member, the sensor mounting member, and the outer cylinder, thereby improving workability. The space between the inner cylinder and the outer cylinder can be reliably closed.
【００２４】また、前記管状部材が蛇腹状をなしている
と、単に弾性材等を用いた場合と比べて伸縮量が大きい
ので、管状部材を外筒の外側にさらに長く引き出すこと
ができるとともに、センサー取付具の取り付け時に管状
部材が外筒内方向に引っ張られないため取り付けの作業
性がさらに向上する。When the tubular member has a bellows shape, the amount of expansion and contraction is greater than when the elastic member is simply used, so that the tubular member can be drawn out to the outside of the outer cylinder for a longer time. Since the tubular member is not pulled inward of the outer cylinder when the sensor attachment is attached, the workability of attachment is further improved.
【図１】本発明に係る内筒の組立・加工工程を示す断面
図である。FIG. 1 is a cross-sectional view illustrating an assembly and processing process of an inner cylinder according to the present invention.
【図２】本発明に係る内筒挿入工程を示す断面図であ
る。FIG. 2 is a cross-sectional view showing an inner cylinder inserting step according to the present invention.
【図３】本発明に係る内筒と外筒との接合工程において
外筒の一端部を内筒と接合させた状態を示す断面図であ
る。FIG. 3 is a cross-sectional view showing a state in which one end of the outer cylinder is joined to the inner cylinder in a joining step of the inner cylinder and the outer cylinder according to the present invention.
【図４】本発明に係るセンサー取付具と管状部材の結合
工程を示す断面図である。FIG. 4 is a cross-sectional view illustrating a process of connecting the sensor mounting member and the tubular member according to the present invention.
【図５】本発明に係る閉塞空間形成工程を示す断面図で
ある。FIG. 5 is a sectional view showing a closed space forming step according to the present invention.
【図６】本発明に係るＯ２センサー取付工程を示す断面
図である。FIG. 6 is a cross-sectional view showing an O 2 sensor mounting step according to the present invention.
【図７】Ｏ２センサーの取付部を示す拡大図である。FIG. 7 is an enlarged view showing a mounting portion of the O 2 sensor.
【図８】Ｏ２センサーの取付部の変形例を示す拡大図で
ある。FIG. 8 is an enlarged view showing a modified example of the mounting portion of the O 2 sensor.
１２ Ｏ２センサー １６ センサー取付具 ２０ 内筒 ２６ 触媒要素 ３０ 外筒 ３２ 空間 ３８ 管状部材 ４０ 内筒孔 ４２ 外筒孔12 O 2 sensor 16 Sensor attachment 20 Inner tube 26 Catalyst element 30 Outer tube 32 Space 38 Tubular member 40 Inner tube hole 42 Outer tube hole
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3G091 AA02 AB01 BA04 BA07 BA27 BA39 EA34 GA06 GB01Z HA27 HA28 HA31 HA32 HA38 HA47 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3G091 AA02 AB01 BA04 BA07 BA27 BA39 EA34 GA06 GB01Z HA27 HA28 HA31 HA32 HA38 HA47
Claims (2)
れた外筒との間に空間が形成された触媒コンバータにＯ
２センサー取り付ける方法であって、 内筒の側周部にその内外を連通する内筒孔を形成し、前
記内筒の内部に触媒を挿入した後に内筒を縮径して触媒
を保持させ、その外周面側に伸縮可能な管状部材の一端
側をその管内と内筒内とが前記内筒孔を通して連通する
ように固定する内筒組立・加工工程と、外筒の側周部に
その内外を連通する外筒孔を形成し、この外筒内に前記
内筒を挿入する内筒挿入工程と、前記外筒の両端部を縮
径してその少なくとも一方を内筒に対して相対変位可能
に両端部を接合するとともに、前記管状部材を伸長させ
その自由端側を外筒の外筒孔から外側に引き出す内筒と
外筒との接合工程と、前記管状部材に管状をなすセンサ
ー取付具を両者の管内が連通するように結合するセンサ
ー取付具と管状部材の結合工程と、前記管状部材を短小
化して前記センサー取付具を外筒に固定して内筒内と外
筒外とを連通させるとともに内筒と外筒との間の空間を
閉塞する閉塞空間形成工程と、前記Ｏ２センサーを内筒
内に位置させて前記センサー取付具に固定することによ
って内筒内の空間を閉塞するＯ２センサー取付工程とか
らなることを特徴とする触媒コンバータのＯ２センサー
取付方法。1. A catalytic converter having a space formed between an inner cylinder holding a catalyst and an outer cylinder disposed outside the inner cylinder.
2 A method of attaching a sensor, wherein an inner cylinder hole communicating between the inner and outer sides is formed in a side peripheral portion of the inner cylinder, and after inserting the catalyst into the inner cylinder, the inner cylinder is reduced in diameter to hold the catalyst, An inner cylinder assembling / working step of fixing one end side of the expandable and contractible tubular member to the outer peripheral surface side so that the inside of the pipe and the inside of the inner cylinder communicate with each other through the inner cylinder hole; Forming an outer cylinder hole communicating with the inner cylinder, inserting the inner cylinder into the outer cylinder, and reducing the diameter of both ends of the outer cylinder so that at least one of the outer cylinders can be displaced relative to the inner cylinder. Joining the inner tube and the outer tube to extend both ends of the tubular member and extend the free end of the tubular member outward from the outer tube hole of the outer tube; and A coupling step of a sensor mounting member and a tubular member that are coupled so that the insides of both tubes communicate with each other, A closed space forming step of shortening the tubular member, fixing the sensor mounting fixture to the outer cylinder, communicating between the inner cylinder and the outer cylinder, and closing a space between the inner cylinder and the outer cylinder; O 2 O 2 sensor mounting step and O 2 sensor mounting method of the catalytic converter, characterized in that it consists of closing the space within the inner cylinder by the sensor is positioned inside the inner cylinder to be fixed to the sensor fixture.
を特徴とする請求項１に記載の触媒コンバータのＯ２セ
ンサー取付方法。Wherein O 2 sensor mounting method of the catalytic converter according to claim 1, wherein the tubular member forms a bellows-like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000361782A JP4452395B2 (en) | 2000-11-28 | 2000-11-28 | O2 sensor mounting method of catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000361782A JP4452395B2 (en) | 2000-11-28 | 2000-11-28 | O2 sensor mounting method of catalytic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002161740A true JP2002161740A (en) | 2002-06-07 |
| JP4452395B2 JP4452395B2 (en) | 2010-04-21 |
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ID=18833171
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000361782A Expired - Fee Related JP4452395B2 (en) | 2000-11-28 | 2000-11-28 | O2 sensor mounting method of catalytic converter |
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| Country | Link |
|---|---|
| JP (1) | JP4452395B2 (en) |
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