JP2007127092A - Alignment fixing structure between throttle body and sensor housing - Google Patents

Alignment fixing structure between throttle body and sensor housing Download PDF

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Publication number
JP2007127092A
JP2007127092A JP2005321854A JP2005321854A JP2007127092A JP 2007127092 A JP2007127092 A JP 2007127092A JP 2005321854 A JP2005321854 A JP 2005321854A JP 2005321854 A JP2005321854 A JP 2005321854A JP 2007127092 A JP2007127092 A JP 2007127092A
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positioning
sensor housing
throttle
throttle body
sensor
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JP4154418B2 (en
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Hiroshige Akiyama
裕茂 秋山
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Keihin Corp
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Keihin Corp
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Priority to JP2005321854A priority Critical patent/JP4154418B2/en
Priority to BRPI0618279-8A priority patent/BRPI0618279B1/en
Priority to US12/092,727 priority patent/US8113171B2/en
Priority to CN200680041482.9A priority patent/CN101305175B/en
Priority to EP06822466.6A priority patent/EP1947317A4/en
Priority to PCT/JP2006/321505 priority patent/WO2007052554A1/en
Publication of JP2007127092A publication Critical patent/JP2007127092A/en
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  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve accuracy of alignment between a throttle body and a sensor housing. <P>SOLUTION: A positioning recess 50 concentrically surrounding the valve stem 5a of the throttle valve 5 and a positioning hole 52 apart from the recess are formed in one side mounting surface 15 of the throttle body 1. A positioning tube 51 fitted to the positioning recess 50 and a positioning pin 53 fitted to the positioning hole 52 are formed on the synthetic resin sensor housing 17 joined to the mounting surface 15 with a plurality of bolts 27 and in which a throttle sensor 18 is contained. The four rows of radially projecting projections 53a, 53a, 53b, 53b of the positioning pin 53 are integrally connected to each other crosswise in cross section to form the fixing structure for alinging between the throttle body and the sensor housing. The positioning pin 53 is so disposed that the pair of projections 53a, 53a projecting in the opposite directions come onto a straightline L connecting both centers of the positioning tube 51 and the positioning pin 53 to each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は，吸気道を有するスロットルボディの一側に形成される取り付け面に，吸気道を開閉するスロットル弁の弁軸を同心で囲繞する位置決め凹部と，この位置決め凹部から離隔する位置決め孔とを設ける一方，前記取り付け面に接合されて，前記スロットル弁の開度を検出するスロットルセンサを収容する合成樹脂製のセンサハウジングに，前記位置決め凹部に嵌合する位置決め筒と，前記位置決め孔に嵌合する位置決めピンとを形成し，その位置決めピンを，放射状に突出する４条の突条を断面十字状に一体に連結して構成した，スロットルボディ及びセンサハウジング間の位置決め固定構造の改良に関する。   In the present invention, a mounting recess formed on one side of a throttle body having an intake passage has a positioning recess concentrically surrounding a valve shaft of a throttle valve that opens and closes the intake passage, and a positioning hole spaced from the positioning recess. On the other hand, a synthetic resin sensor housing which is joined to the mounting surface and accommodates a throttle sensor for detecting the opening degree of the throttle valve, is fitted into the positioning cylinder and the positioning hole. The present invention relates to an improvement in a positioning and fixing structure between a throttle body and a sensor housing, in which a positioning pin is formed and four positioning ridges projecting radially are integrally connected in a cross shape.

かゝるスロットルボディ及びセンサハウジング間の位置決め固定構造は，特許文献１に開示されるように，既に知られている。
特開２００２−２９５２５７号公報 Such a positioning and fixing structure between the throttle body and the sensor housing is already known, as disclosed in Japanese Patent Application Laid-Open No. H10-228707.
JP 2002-295257 A

かゝるスロットルボディ及びセンサハウジング間の位置決め固定構造において，位置決めピンを，放射状に突出する４条の突条を断面十字状に一体に連結して構成することは，位置決めピンを，その剛性を確保しながら歩留りよく形成し得る点で有利である。しかしながら，従来のものでは，位置決めピンの突条の配置については何等考慮されていなかった。   In such a positioning and fixing structure between the throttle body and the sensor housing, the positioning pin is configured by integrally connecting the four protruding ribs in a cross-shaped manner in a cross-sectional manner. It is advantageous in that it can be formed with good yield while ensuring. However, in the prior art, no consideration has been given to the arrangement of the positioning pin protrusions.

そこで，本発明は，位置決め筒に対して，位置決めピンの突条の配置を規定することにより，スロットルボディ及びセンサハウジング間の位置決め精度を高める得るようにした，前記スロットルボディ及びセンサハウジング間の位置決め固定構造を提供することを目的とする。   Accordingly, the present invention provides a positioning between the throttle body and the sensor housing that can improve the positioning accuracy between the throttle body and the sensor housing by defining the arrangement of the protrusions of the positioning pins with respect to the positioning cylinder. The object is to provide a fixed structure.

上記目的を達成するために，本発明は，吸気道を有するスロットルボディの一側に形成される取り付け面に，吸気道を開閉するスロットル弁の弁軸を同心で囲繞する位置決め凹部と，この位置決め凹部から離隔する位置決め孔とを設ける一方，前記取り付け面に接合されて，前記スロットル弁の開度を検出するスロットルセンサを収容する合成樹脂製のセンサハウジングに，前記位置決め凹部に嵌合する位置決め筒と，前記位置決め孔に嵌合する位置決めピンとを形成し，その位置決めピンを，放射状に突出する４条の突条を断面十字状に一体に連結して構成した，スロットルボディ及びセンサハウジング間の位置決め固定構造において，前記位置決めピンを，互いに反対方向に突出する一対の前記突条が前記位置決め筒及び位置決めピンの両中心間を結ぶ直線上に来るように配置したことを第１の特徴とする。   In order to achieve the above object, the present invention provides a positioning recess that concentrically surrounds a valve shaft of a throttle valve that opens and closes an intake passage, on a mounting surface formed on one side of a throttle body having an intake passage, A positioning cylinder that is provided with a positioning hole that is spaced apart from the recess, and is fitted to the positioning recess in a synthetic resin sensor housing that is joined to the mounting surface and accommodates a throttle sensor that detects the opening of the throttle valve. And a positioning pin that fits into the positioning hole, and the positioning pin is formed by integrally connecting four projecting ridges projecting radially in a cross-shaped cross section. In the fixing structure, the pair of protrusions projecting in the opposite directions from each other are positioned on the positioning cylinder and the positioning pin. That is arranged to come on a straight line connecting the centers a first feature.

また本発明は，第１の特徴に加えて，前記位置決めピンを前記位置決め孔に隙間嵌めしたことを第２の特徴とする。   In addition to the first feature, the present invention has a second feature that the positioning pin is fitted into the positioning hole.

本発明の第１の特徴によれば，スロットルボディの取り付け面に対するセンサハウジングの位置決め時，センサハウジングの位置決め筒周りの回転は，位置決めピンと位置決め孔との嵌合，特に，位置決めピンの，前記直線と直交する方向に並ぶ一対の位置決め突条が位置決め孔の内周面に嵌合することで阻止されるので，前記直線と直交する方向に並ぶ一対の位置決め突条の製作誤差のみを考慮することで，センサハウジングの，位置決め筒周りの所定の位置決め精度を得ることができ，精度管理が単純化し，コストの低減に寄与し得る。一方，前記直線上に並ぶ一対の突条は，上記他方の一対の突条に一体に連結して，相互に補強することで，位置決めピンの剛性を強化することができる。   According to the first aspect of the present invention, when the sensor housing is positioned with respect to the mounting surface of the throttle body, the rotation of the sensor housing around the positioning cylinder is caused by the fitting between the positioning pin and the positioning hole, in particular, the straight line of the positioning pin. Since a pair of positioning ridges arranged in a direction perpendicular to the straight line is prevented by fitting to the inner peripheral surface of the positioning hole, only the manufacturing error of the pair of positioning ridges arranged in the direction orthogonal to the straight line should be considered. Thus, a predetermined positioning accuracy of the sensor housing around the positioning cylinder can be obtained, the accuracy control can be simplified, and the cost can be reduced. On the other hand, the pair of ridges arranged on the straight line are integrally connected to the other pair of ridges and reinforced with each other, whereby the rigidity of the positioning pin can be enhanced.

本発明の第２の特徴によれば，４条の突条は，位置決め孔に隙間嵌めされるので，エンジンの発する熱によりセンサハウジングが膨張して，位置決め筒及び位置決めピンの中心間距離が多少変化しても，その変化を位置決めピン及び位置決め孔間の隙間に吸収させることができ，したがってセンサハウジングの歪みを回避して，スロットルセンサの誤動作を防ぐことができる。   According to the second feature of the present invention, since the four ridges are fitted into the positioning holes, the sensor housing expands due to the heat generated by the engine, and the distance between the centers of the positioning cylinder and the positioning pins is somewhat increased. Even if there is a change, the change can be absorbed by the gap between the positioning pin and the positioning hole, so that the sensor housing can be prevented from being distorted and the malfunction of the throttle sensor can be prevented.

本発明の実施の形態を，添付図面に示す本発明の好適な実施例に基づいて以下に説明する。   Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

図１は本発明に係るエンジンの吸気装置の縦断平面図，図２は図１の２−２線断面図，図３は図１の３−３線断面図，図４は電子制御ユニットを外した状態で示す，図３の４矢視図，図５は図３の５−５線断面図，図６は図３の６−６線断面図，図７は図６の７−７線拡大断面図である。   1 is a longitudinal plan view of an intake system for an engine according to the present invention, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, FIG. 3 is a sectional view taken along line 3-3 in FIG. 3 is a sectional view taken along the arrow 4 in FIG. 3, FIG. 5 is a sectional view taken along line 5-5 in FIG. 3, FIG. 6 is a sectional view taken along line 6-6 in FIG. It is sectional drawing.

先ず図１〜図３において，本発明のエンジンの吸気装置は，エンジンの吸気ポート（図示せず）に連なる水平方向の吸気道２を有するスロットルボディ１を備える。このスロットルボディ１の周壁には，吸気道２を挟んで水平方向に並ぶ一対の軸受孔３，４が形成されており，これら軸受孔３，４により，吸気道２を開閉するバタフライ型スロットル弁５の弁軸５ａが水平にして回転自在に支承され，各軸受孔３，４には，弁軸５ａの外周面に密接するシール部材６，７がそれぞれ装着される。軸受孔３から外方に突出する弁軸５ａの一端部にはスロットルドラム８が固着される。またスロットルボディ１の上部壁には，スロットル弁５より下流の吸気道２に向けて燃料を噴射し得る燃料噴射弁９が装着される。   1 to 3, the engine intake device of the present invention includes a throttle body 1 having a horizontal intake passage 2 connected to an intake port (not shown) of the engine. A pair of bearing holes 3, 4 are formed in the peripheral wall of the throttle body 1 in the horizontal direction with the intake passage 2 in between. A butterfly throttle valve that opens and closes the intake passage 2 by these bearing holes 3, 4. 5 is supported horizontally and rotatably, and seal members 6 and 7 that are in close contact with the outer peripheral surface of the valve shaft 5a are mounted in the bearing holes 3 and 4, respectively. A throttle drum 8 is fixed to one end portion of the valve shaft 5a protruding outward from the bearing hole 3. A fuel injection valve 9 capable of injecting fuel toward the intake passage 2 downstream from the throttle valve 5 is mounted on the upper wall of the throttle body 1.

スロットルボディ１の，スロットルドラム８側の側壁には，スロットル弁５を迂回して吸気道２に接続されるバイパス路１０が形成され，このバイパス路１０の途中に，これを開閉すべく電動モータ１２により作動されるバイパス弁１１が介装される。バイパス弁１１は，エンジンの冷間作動時，その温度に応じて電動モータ１２により開かれることにより，バイパス路１０を通してファーストアイドル用の空気をエンジンに供給することができる。   A bypass path 10 that bypasses the throttle valve 5 and is connected to the intake passage 2 is formed on the side wall of the throttle body 1 on the throttle drum 8 side, and an electric motor is provided in the middle of the bypass path 10 to open and close the bypass path 10. A bypass valve 11 actuated by 12 is interposed. The bypass valve 11 can be supplied with fast idle air to the engine through the bypass 10 by being opened by the electric motor 12 according to the temperature when the engine is cold.

上記スロットルドラム８と反対側のスロットルボディ１の側面には，他の側面より一段高い取り付け面１５が形成されており，この取り付け面１５にセンサユニット１６が取り付けられる。   A mounting surface 15 that is one step higher than the other side surfaces is formed on the side surface of the throttle body 1 opposite to the throttle drum 8, and the sensor unit 16 is mounted on the mounting surface 15.

図１，図３〜図６において，センサユニットは，上記取り付け面１５に接合されるセンサハウジング１７に，スロットルセンサ１８，吸気温センサ１９，負圧センサ２０及び電子制御ユニット２１を取り付けて構成されるもので，これら構成要素について順次説明する。   1 and 3 to 6, the sensor unit is configured by attaching a throttle sensor 18, an intake air temperature sensor 19, a negative pressure sensor 20, and an electronic control unit 21 to a sensor housing 17 joined to the mounting surface 15. These components will be described in turn.

先ず，センサハウジング１７は，その外周に３個以上（図示例では３個）の取り付けボス２５，２５…を一体に有しており，これら取り付けボス２５，２５…に対応するねじ孔２６，２６…が取り付け面１５に設けられ，各取り付けボス２５に挿通されるボルト２７を対応するねじ孔２６に螺合緊締することにより，センサハウジング１７は取り付け面１５に締結されるようになっている。   First, the sensor housing 17 integrally has three or more (three in the illustrated example) mounting bosses 25, 25... On the outer periphery thereof, and screw holes 26, 26 corresponding to these mounting bosses 25, 25. Are provided on the mounting surface 15, and the sensor housing 17 is fastened to the mounting surface 15 by screwing and tightening bolts 27 inserted into the mounting bosses 25 into the corresponding screw holes 26.

センサハウジング１７には，前記軸受孔４と同軸上に配置されるロータ支持孔２８が設けられ，このロータ支持孔２８に，前記弁軸５ａの端部に連結するロータ１８ａが回転自在に支承され，このロータ１８ａと協働してスロットルセンサ１８を構成するステータ１８ｂがセンサハウジング１７に固定される。而して，スロットルセンサ１８は，スロットル弁５の開度をロータ１８ａで検出し，それに対応した電気信号をステータ１８ｂから出力することができる。   The sensor housing 17 is provided with a rotor support hole 28 disposed coaxially with the bearing hole 4, and a rotor 18 a connected to the end of the valve shaft 5 a is rotatably supported by the rotor support hole 28. The stator 18b constituting the throttle sensor 18 is fixed to the sensor housing 17 in cooperation with the rotor 18a. Thus, the throttle sensor 18 can detect the opening of the throttle valve 5 with the rotor 18a and output an electric signal corresponding to the detected value from the stator 18b.

スロットルボディ１には，取り付け面１５からスロットル弁５より上流の吸気道２に達する透孔２９が形成されており，この透孔２９を貫通して先端を吸気道２に臨ませるセンサ保持筒３０がセンサハウジング１７に一体に形成され，このセンサ保持筒３０に吸気道２の上流の温度を検知する吸気温センサ１９が装着される。   A through hole 29 is formed in the throttle body 1 so as to reach the intake passage 2 upstream of the throttle valve 5 from the mounting surface 15, and a sensor holding cylinder 30 that passes through the through hole 29 and faces the intake passage 2. Is formed integrally with the sensor housing 17, and an intake air temperature sensor 19 for detecting the temperature upstream of the intake passage 2 is attached to the sensor holding cylinder 30.

またセンサハウジング１７には，取り付け面１５から充分に離間した外側面にセンサ保持凹部３１が形成され，このセンサ保持凹部３１に負圧センサ２０が装着される。   In the sensor housing 17, a sensor holding recess 31 is formed on the outer surface sufficiently separated from the mounting surface 15, and the negative pressure sensor 20 is attached to the sensor holding recess 31.

図３に明示するように，スロットル弁５より下流の吸気道２を負圧センサ２０に連通する負圧伝達路３５がスロットルボディ１からセンサハウジング１７に亙り設けられる。この負圧伝達路３５は，一端部を，吸気道２の軸線を含む水平面Ｈに近接し且つ吸気道２の上半周面に開口して水平に延びるようスロットルボディ１に設けられる第１通路３５ａと，この第１通路３５ａの他端部から上方へ略直角に屈曲して延びるようスロットルボディ１及びセンサハウジング１７の接合面間に形成される溝状の第２通路３５ｂと，この第２通路３５ｂの上端から再び水平に延びて負圧センサ２０に達するようセンサハウジング１７に形成される第３通路３５ｃとでクランク状に構成され，その第３通路３５ｃには，伝達される負圧の脈動を減衰するオリフィス３６が設けられる。   As clearly shown in FIG. 3, a negative pressure transmission path 35 that connects the intake passage 2 downstream of the throttle valve 5 to the negative pressure sensor 20 is provided from the throttle body 1 to the sensor housing 17. The negative pressure transmission path 35 has a first passage 35a provided in the throttle body 1 so that one end thereof is close to a horizontal plane H including the axis of the intake passage 2 and opens horizontally in the upper half circumferential surface of the intake passage 2. A groove-shaped second passage 35b formed between the joint surfaces of the throttle body 1 and the sensor housing 17 so as to bend and extend upward at a substantially right angle from the other end of the first passage 35a, and the second passage. A third passage 35c formed in the sensor housing 17 extends horizontally from the upper end of 35b to reach the negative pressure sensor 20 in a crank shape, and the pulsation of the negative pressure transmitted to the third passage 35c. Is provided.

溝状の第２通路３５ｂは，図示例ではスロットルボディ１の取り付け面１５に形成され，この第２通路３５ｂを囲繞する第１シール溝３７と，スロットルセンサ１８を囲繞する第２シール溝３８と，前記透孔２９を囲繞する第３シール溝３９とが相互に連通するようにして取り付け面１５に形成される。これらシール溝３７〜３９には，一連のシール部材４０が装着される。このように，第２通路３５ｂ及び第１〜第３シール溝３７〜３９を取り付け面１５に形成すると，スロットルボディ１の鋳造又は射出成形により製作するとき，これら第２通路３５ｂ及びシール溝３７〜３９を狂いなく同時に形成することができ，製作コストの低減を図ることができると共に，シール溝３７〜３９に装着されるシール部材４０により第２通路３５ｂ周りを確実にシールすることができる。   In the illustrated example, the groove-shaped second passage 35b is formed on the mounting surface 15 of the throttle body 1, and includes a first seal groove 37 that surrounds the second passage 35b, and a second seal groove 38 that surrounds the throttle sensor 18. The third sealing groove 39 surrounding the through hole 29 is formed on the mounting surface 15 so as to communicate with each other. A series of seal members 40 are mounted in these seal grooves 37 to 39. Thus, when the second passage 35b and the first to third seal grooves 37 to 39 are formed on the mounting surface 15, when the throttle body 1 is manufactured by casting or injection molding, the second passage 35b and the seal grooves 37 to 39 are formed. 39 can be formed at the same time without error, and the manufacturing cost can be reduced, and the periphery of the second passage 35b can be reliably sealed by the seal member 40 mounted in the seal grooves 37 to 39.

また第２通路３５ｂは，センサハウジング１７の３個以上の取り付けボス２５，２５…の中心を直線４２ａで順次結んでなる多角形４２（図５及び図６参照）内に，且つ多角形４２の１本の直線４２ａに沿って配置される。こうすることで，ボルト２７，２７…の締結力を取り付けボス２５，２５…から第２通路３５ｂ周りのシール部材４０に効率よく伝達することができて，第２通路３５ｂ周りのシールを確実に行うことができる。   Further, the second passage 35b is formed in a polygon 42 (see FIGS. 5 and 6) in which the centers of three or more mounting bosses 25, 25... Arranged along one straight line 42a. By doing so, the fastening force of the bolts 27, 27... Can be efficiently transmitted from the mounting bosses 25, 25... To the seal member 40 around the second passage 35b, and the seal around the second passage 35b is reliably ensured. It can be carried out.

図１及び図４に示すように，センサハウジング１７の外端部には，電子制御ユニット２１の基板４５が設置される。その際，基板４５には前記スロットルセンサ１８，吸気温センサ１９及び負圧センサ２０の端子が接続される。また基板４５上に各種半導体素子４６が付設される。さらにセンサハウジング１７の一側には，電子制御ユニット２１を介して上記各種センサ１８〜２０の出力信号を外部に引き出すカプラ４７が一体に形成される。   As shown in FIGS. 1 and 4, the substrate 45 of the electronic control unit 21 is installed on the outer end of the sensor housing 17. At that time, terminals of the throttle sensor 18, the intake air temperature sensor 19 and the negative pressure sensor 20 are connected to the substrate 45. Various semiconductor elements 46 are attached on the substrate 45. Further, on one side of the sensor housing 17, a coupler 47 is formed integrally to draw out output signals of the various sensors 18 to 20 through the electronic control unit 21.

而して，エンジンの運転中，スロットルセンサ１８，吸気温センサ１９及び負圧センサ２０の各出力信号は，燃料噴射量，点火時期，ファーストアイドル吸気量等の制御に使用される。   Thus, during operation of the engine, the output signals of the throttle sensor 18, the intake air temperature sensor 19 and the negative pressure sensor 20 are used for control of the fuel injection amount, ignition timing, fast idle intake amount, and the like.

ところで，負圧伝達路３５は吸気道２の上半周面に開口するので，吸気道２の内周面に付着して流下する燃料の滴の負圧伝達路３５への浸入を防ぐことができる。   Incidentally, since the negative pressure transmission path 35 opens in the upper half circumferential surface of the intake passage 2, it is possible to prevent the fuel droplets adhering to the inner circumferential surface of the intake passage 2 from flowing into the negative pressure transmission path 35. .

またエンジンの吸気吹き返し現象により燃料やカーボン等の異物が吸気道２から負圧伝達路３５に侵入しても，負圧センサ２０は，負圧伝達路３５の吸気道２への開口部から上方に大きく離れており，しかも負圧伝達路３５は，第１〜第３通路３５ａ〜３５ｃにより流路抵抗の大きいクランク状に構成されているから，上記異物は負圧センサ２０に到達することができず，したがって異物から負圧センサ２０を保護して，その機能及び耐久性を確保することができる。   Further, even if a foreign matter such as fuel or carbon enters the negative pressure transmission path 35 from the intake passage 2 due to the intake air blowback phenomenon of the engine, the negative pressure sensor 20 is located above the opening of the negative pressure transmission path 35 to the intake passage 2. The negative pressure transmission path 35 is formed in a crank shape having a large flow path resistance by the first to third paths 35a to 35c, so that the foreign matter can reach the negative pressure sensor 20. Therefore, the negative pressure sensor 20 can be protected from foreign matter, and its function and durability can be ensured.

こゝで，スロットルボディ１におけるセンサユニット１６のための取り付け面１５の形状を変えずに，吸気道２の直径を大小異にする複数種類のスロットルボディ１を鋳造又は射出により製作する場合について説明すると，図３に示すように，直径を異にする大小の吸気道２Ｌ，２Ｓは，全て軸受孔４の吸気道２への開口端側で接するように形成される。而して，大径の吸気道２Ｌが形成されるときは，その内周面が負圧伝達路３５の第１通路３５ａを削除するように広がることになるが，その第１通路３５ａは，元々，吸気道の軸線を含む水平面Ｈに近接して配置されているから，吸気道２の広がる内周面により削除される量は極めて少なく，したがって何れの種類のスロットルボディ１においても負圧伝達路３５の屈曲効果を確保し得て，異物の負圧センサ２０への侵入を防ぐことができる。小径の吸気道２Ｓを形成する場合は，第１通路３５ａは多少長くなるので，何等問題は起きない。   Here, a description will be given of a case where a plurality of types of throttle bodies 1 having different diameters of the intake passage 2 are manufactured by casting or injection without changing the shape of the mounting surface 15 for the sensor unit 16 in the throttle body 1. Then, as shown in FIG. 3, the large and small intake passages 2 </ b> L and 2 </ b> S having different diameters are formed so as to be in contact with each other at the opening end side of the bearing hole 4 to the intake passage 2. Thus, when the large-diameter intake passage 2L is formed, its inner peripheral surface expands so as to delete the first passage 35a of the negative pressure transmission passage 35, but the first passage 35a is Originally, it is arranged close to the horizontal plane H including the axis of the intake passage, so that the amount deleted by the inner peripheral surface of the intake passage 2 is extremely small. Therefore, the negative pressure transmission in any type of throttle body 1 The bending effect of the path 35 can be ensured, and foreign matter can be prevented from entering the negative pressure sensor 20. When the small-diameter intake passage 2S is formed, the first passage 35a is somewhat longer, so no problem occurs.

さて，センサハウジング１７の取り付け面１５への位置決め固定構造について，図５〜図７を参照しながら説明する。   Now, a positioning and fixing structure to the mounting surface 15 of the sensor housing 17 will be described with reference to FIGS.

スロットルボディ１の取り付け面１５には，弁軸５ａを同心上で囲繞する円形の位置決め凹部５０と，この位置決め凹部５０から半径方向に離間した位置決め孔５２が設けられる。一方，センサハウジング１７は合成樹脂製であって，上記位置決め凹部５０に嵌合する位置決め筒５１と，上記位置決め孔５２に嵌合する位置決めピン５３とが３個以上の前記取り付けボス２５，２５…と共に，センサハウジング１７の成形と共に形成される。その際，位置決めピン５３は，放射状に突出する４条の突条５３ａ，５３ａ，５３ｂ，５３ｂを断面十字状に一体に連結して構成されると共に，位置決めピン５３の直径線上に並ぶ一対の突条５３ａ，５３ａが上記位置決め筒５１の中心と位置決めピン５３の中心とを結ぶ直線Ｌ上に来るように配置される。したがって他の一対の突条５３ｂ，５３ｂは，上記突条５３ａ，５３ａと直交関係にある。   A circular positioning recess 50 that concentrically surrounds the valve shaft 5 a and a positioning hole 52 that is spaced apart from the positioning recess 50 in the radial direction are provided on the mounting surface 15 of the throttle body 1. On the other hand, the sensor housing 17 is made of synthetic resin, and includes three or more mounting bosses 25, 25,... Having three or more positioning cylinders 51 that fit into the positioning recesses 50 and positioning pins 53 that fit into the positioning holes 52. At the same time, the sensor housing 17 is formed. At this time, the positioning pin 53 is configured by integrally connecting four protruding ridges 53 a, 53 a, 53 b, 53 b in a cross-shaped cross section, and a pair of protrusions arranged on the diameter line of the positioning pin 53. The strips 53a and 53a are arranged so as to be on a straight line L connecting the center of the positioning cylinder 51 and the center of the positioning pin 53. Therefore, the other pair of protrusions 53b and 53b are orthogonal to the protrusions 53a and 53a.

位置決め筒５１及び位置決めピン５３は，取り付け面１５に開口する位置決め凹部５０及び位置決め孔５２にそれぞれ隙間嵌めされるように成形される。   The positioning cylinder 51 and the positioning pin 53 are formed so as to be fitted in the positioning recesses 50 and the positioning holes 52 opened in the mounting surface 15.

而して，センサユニット１６の構成後，そのセンサハウジング１７を取り付け面１５に取り付ける際には，先ず，位置決め筒５１を位置決め凹部５０に，また位置決めピン５３を位置決め孔５２にそれぞれ隙間嵌めする。これによって取り付けボス２５，２５…の固定位置が決定され，図示例では３個の取り付けボス２５，２５…を，それに対応する取り付け面１５上の３個のねじ孔２６，２６…に合致させることができる。そこで，各取り付けボス２５に挿通したボルト２７をねじ孔２６に螺合緊締する。かくしてセンサハウジング１７は取り付け面１５に定位置に固定される。   Thus, after the sensor unit 16 is configured, when the sensor housing 17 is attached to the attachment surface 15, first, the positioning cylinder 51 is fitted into the positioning recess 50 and the positioning pin 53 is fitted into the positioning hole 52. In this example, the fixing positions of the mounting bosses 25, 25... Are determined, and in the illustrated example, the three mounting bosses 25, 25... Are matched with the three screw holes 26, 26. Can do. Therefore, the bolts 27 inserted through the mounting bosses 25 are screwed and tightened into the screw holes 26. Thus, the sensor housing 17 is fixed to the mounting surface 15 at a fixed position.

ところで，位置決めピン５３は，前述のように，放射状に突出する４つの突条５３ａ，５３ａ，５３ｂ，５３ｂを断面十字状に一体に連結して構成されると共に，位置決めピン５３の直径線上の一対の５３ａ，５３ａが上記位置決め筒５１の中心と位置決めピン５３の中心とを結ぶ直線Ｌ上に来るように配置されるので，センサハウジング１７の位置決め時，センサハウジング１７の位置決め筒５１周りの回転は，位置決めピン５３と位置決め孔５２との嵌合，特に，位置決めピン５３の，前記直線Ｌと直交する方向に並ぶ一対の位置決め突条５３ｂ，５３ｂが位置決め孔５２の内周面に嵌合することで阻止される。したがって，位置決め突条５３ｂ，５３の製作誤差のみを考慮することで，センサハウジング１７の，位置決め筒５１周りの所定の位置決め精度を得ることができ，精度管理が単純化し，コストの低減に寄与し得る。   By the way, as described above, the positioning pin 53 is configured by integrally connecting the four projecting ridges 53a, 53a, 53b, 53b in a cross-shaped cross section, and a pair of positioning pins 53 on the diameter line. 53a, 53a are arranged on a straight line L connecting the center of the positioning cylinder 51 and the center of the positioning pin 53, so that when the sensor housing 17 is positioned, the rotation of the sensor housing 17 around the positioning cylinder 51 is The positioning pin 53 and the positioning hole 52 are fitted, and in particular, the pair of positioning protrusions 53b and 53b of the positioning pin 53 aligned in the direction orthogonal to the straight line L are fitted to the inner peripheral surface of the positioning hole 52. Is blocked. Therefore, by considering only the manufacturing error of the positioning protrusions 53b and 53, the predetermined positioning accuracy of the sensor housing 17 around the positioning cylinder 51 can be obtained, the accuracy management is simplified, and the cost is reduced. obtain.

また前記直線Ｌ上に配置される一対の突条５３ａ，５３ａは，上記他方の一対の突条５３ｂ，５３ｂに一体に連結して，相互に補強することで，位置決めピンの剛性を強化することができる。   Further, the pair of protrusions 53a, 53a arranged on the straight line L are integrally connected to the other pair of protrusions 53b, 53b and reinforced with each other, thereby enhancing the rigidity of the positioning pin. Can do.

さらに上記突条５３ａ，５３ａ，５３ｂ，５３ｂは，位置決め孔５２に隙間嵌めしてあるから，エンジンの発する熱によりセンサハウジング１７が膨張して，位置決め筒５１及び位置決めピン５３の中心間距離が多少変化しても，その変化は位置決めピン５３及び位置決め孔５２間の隙間に吸収されることで，センサハウジング１７に歪みを生じさせることはなく，したがってその歪みによるスロットルセンサ１８の誤動作を防ぐことができる。   Further, since the protrusions 53a, 53a, 53b, and 53b are fitted in the positioning holes 52, the sensor housing 17 is expanded by the heat generated by the engine, and the distance between the centers of the positioning cylinder 51 and the positioning pins 53 is slightly increased. Even if there is a change, the change is absorbed in the gap between the positioning pin 53 and the positioning hole 52, so that the sensor housing 17 is not distorted, and therefore the malfunction of the throttle sensor 18 due to the distortion can be prevented. it can.

以上，本発明の実施例について説明したが，本発明はそれに限定されることなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。   As mentioned above, although the Example of this invention was described, this invention is not limited to it, A various design change is possible in the range which does not deviate from the summary.

本発明に係るエンジンの吸気装置の縦断平面図である。1 is a longitudinal plan view of an intake device for an engine according to the present invention. 図１の２−２線断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG. 図１の３−３線断面図である。FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. 電子制御ユニットを外した状態で示す，図３の４矢視図である。FIG. 4 is a view taken in the direction of arrow 4 in FIG. 図３の５−５線断面図である。FIG. 5 is a sectional view taken along line 5-5 of FIG. 図３の６−６線断面図である。FIG. 6 is a sectional view taken along line 6-6 of FIG. 図６の７−７線拡大断面図である。FIG. 7 is an enlarged cross-sectional view taken along line 7-7 in FIG. 6.

符号の説明Explanation of symbols

１・・・・・スロットルボディ
２・・・・・吸気道
５・・・・・スロットル弁
５ａ・・・・弁軸
１５・・・・取り付け面
１７・・・・センサハウジング
１８・・・・スロットルセンサ
２７・・・・ボルト
５０・・・・位置決め凹部
５１・・・・位置決め筒
５２・・・・位置決め孔
５３・・・・位置決めピン
５３ａ，５３ｂ・・・突条
Ｌ・・・・・位置決め筒及び位置決めピンの両中心間を結ぶ直線 DESCRIPTION OF SYMBOLS 1 ... Throttle body 2 ... Intake passage 5 ... Throttle valve 5a ... Valve shaft 15 ... Mounting surface 17 ... Sensor housing 18 ... Throttle sensor 27 ... Bolt 50 ... Positioning recess 51 ... Positioning cylinder 52 ... Positioning hole 53 ... Positioning pins 53a, 53b ... Projection L ... Straight line connecting the centers of the positioning cylinder and positioning pin

Claims (2)

吸気道（２）を有するスロットルボディ（１）の一側に形成される取り付け面（１５）に，吸気道（２）を開閉するスロットル弁（５）の弁軸（５ａ）を同心で囲繞する位置決め凹部（５０）と，この位置決め凹部（５０）から離隔する位置決め孔（５２）とを設ける一方，前記取り付け面（１５）に複数のボルト（２７）により接合されて，前記スロットル弁（５）の開度を検出するスロットルセンサ（１８）を収容する合成樹脂製のセンサハウジング（１７）に，前記位置決め凹部（５０）に嵌合する位置決め筒（５１）と，前記位置決め孔（５２）に嵌合する位置決めピン（５３）とを形成し，その位置決めピン（５３）を，放射状に突出する４条の突条（５３ａ，５３ａ，５３ｂ，５３ｂ）を断面十字状に一体に連結して構成した，スロットルボディ及びセンサハウジング間の位置決め固定構造において，
前記位置決めピン（５３）を，互いに反対方向に突出する一対の前記突条（５３ａ，５３ａ）が前記位置決め筒（５１）及び位置決めピン（５３）の両中心間を結ぶ直線（Ｌ）上に来るように配置したことを特徴とする，スロットルボディ及びセンサハウジング間の位置決め固定構造。 A valve shaft (5a) of the throttle valve (5) for opening and closing the intake passage (2) is concentrically surrounded by a mounting surface (15) formed on one side of the throttle body (1) having the intake passage (2). A positioning recess (50) and a positioning hole (52) spaced from the positioning recess (50) are provided, and the throttle valve (5) is joined to the mounting surface (15) by a plurality of bolts (27). A sensor housing (17) made of synthetic resin that houses a throttle sensor (18) for detecting the opening of the positioning cylinder (51) fitted into the positioning recess (50) and the positioning hole (52). The positioning pin (53) is formed, and the positioning pin (53) is configured by integrally connecting four protrusions (53a, 53a, 53b, 53b) protruding radially in a cross-shaped cross section. , In positioning the fixed structure between lots le body and the sensor housing,
The pair of protrusions (53a, 53a) projecting the positioning pin (53) in opposite directions are on a straight line (L) connecting the centers of the positioning cylinder (51) and the positioning pin (53). A positioning and fixing structure between the throttle body and the sensor housing, characterized by being arranged as described above. 請求項１記載のスロットルボディ及びセンサハウジング間の位置決め固定構造において，
前記位置決めピン（５３）を前記位置決め孔（５２）に隙間嵌めしたことを特徴とする，スロットルボディ及びセンサハウジング間の位置決め固定構造。 The positioning and fixing structure between the throttle body and the sensor housing according to claim 1,
A positioning and fixing structure between the throttle body and the sensor housing, wherein the positioning pin (53) is fitted into the positioning hole (52) with a gap.
JP2005321854A 2005-11-07 2005-11-07 Positioning and fixing structure between throttle body and sensor housing Expired - Fee Related JP4154418B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2005321854A JP4154418B2 (en) 2005-11-07 2005-11-07 Positioning and fixing structure between throttle body and sensor housing
BRPI0618279-8A BRPI0618279B1 (en) 2005-11-07 2006-10-27 engine intake system
US12/092,727 US8113171B2 (en) 2005-11-07 2006-10-27 Engine intake system
CN200680041482.9A CN101305175B (en) 2005-11-07 2006-10-27 Air intake device for engine
EP06822466.6A EP1947317A4 (en) 2005-11-07 2006-10-27 Air intake device for engine
PCT/JP2006/321505 WO2007052554A1 (en) 2005-11-07 2006-10-27 Air intake device for engine

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JP2005321854A JP4154418B2 (en) 2005-11-07 2005-11-07 Positioning and fixing structure between throttle body and sensor housing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009287476A (en) * 2008-05-29 2009-12-10 Honda Motor Co Ltd Intake air control device for general purpose engine
CN106762162A (en) * 2015-11-19 2017-05-31 大陆汽车电子(芜湖)有限公司 The axial gap method of adjustment of air throttle and throttle plate pin with axial positioning structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002295272A (en) * 2001-03-29 2002-10-09 Denso Corp Linkage structure of throttle body and throttle cover
JP2002349397A (en) * 2001-05-24 2002-12-04 Honda Motor Co Ltd Intake air amount control device for engine
JP2003148303A (en) * 2001-04-27 2003-05-21 Keihin Corp Intake air quantity control device of engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002295272A (en) * 2001-03-29 2002-10-09 Denso Corp Linkage structure of throttle body and throttle cover
JP2003148303A (en) * 2001-04-27 2003-05-21 Keihin Corp Intake air quantity control device of engine
JP2002349397A (en) * 2001-05-24 2002-12-04 Honda Motor Co Ltd Intake air amount control device for engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009287476A (en) * 2008-05-29 2009-12-10 Honda Motor Co Ltd Intake air control device for general purpose engine
CN106762162A (en) * 2015-11-19 2017-05-31 大陆汽车电子(芜湖)有限公司 The axial gap method of adjustment of air throttle and throttle plate pin with axial positioning structure
CN106762162B (en) * 2015-11-19 2020-01-21 大陆汽车电子(芜湖)有限公司 Throttle valve with axial positioning structure and method for adjusting axial clearance of throttle valve shaft

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