JP6892207B2

JP6892207B2 - Sensor unit

Info

Publication number: JP6892207B2
Application number: JP2018075699A
Authority: JP
Inventors: 大地稲垣; 賢矢本間; 康太濱井
Original assignee: Hitachi Astemo Ltd
Current assignee: Hitachi Astemo Ltd
Priority date: 2018-04-10
Filing date: 2018-04-10
Publication date: 2021-06-23
Anticipated expiration: 2038-04-10
Also published as: WO2019198720A1; JP2019184428A

Description

本発明は、空気の圧力を検出可能な複数の圧力センサをケーシングに収納したセンサユニットに関する。 The present invention relates to a sensor unit in which a plurality of pressure sensors capable of detecting air pressure are housed in a casing.

従来から、車両に搭載される内燃機関へ供給される空気の流量を制御するスロットルバルブ装置には、例えば、流路を開閉するためのバルブの開度を検出するポジションセンサや、吸入される空気の温度を検出するための吸気温度センサや、前記空気の圧力を検出するための吸気圧力センサが設けられ、各センサによって検出された様々なデータが内燃機関の燃焼制御等に用いられている。 Conventionally, a throttle valve device that controls the flow rate of air supplied to an internal combustion engine mounted on a vehicle includes, for example, a position sensor that detects the opening degree of a valve for opening and closing the flow path, and air that is taken in. An intake air temperature sensor for detecting the temperature of the engine and an intake pressure sensor for detecting the pressure of the air are provided, and various data detected by each sensor is used for combustion control of an internal combustion engine and the like.

例えば、特許文献１に開示されるスロットル装置では、スロットルボディの側部にセンサユニットが設けられ、このセンサユニットにおけるセンサ本体の内部に吸気圧力センサ及び外気圧センサが収納されている。そして、吸気圧力センサが、回路基板の下方に接続されると共に、前記回路基板の上方に接続された外気圧センサが、そのセンサ本体から突出した端部を介してセンサユニット外部の空気（外気）の圧力を検出している。 For example, in the throttle device disclosed in Patent Document 1, a sensor unit is provided on a side portion of the throttle body, and an intake pressure sensor and an external atmospheric pressure sensor are housed inside the sensor body in the sensor unit. Then, the intake pressure sensor is connected below the circuit board, and the outside air pressure sensor connected above the circuit board is connected to the air (outside air) outside the sensor unit via the end protruding from the sensor body. Pressure is detected.

また、特許文献２に係る圧力検出装置では、パッケージの内部に大気圧センサ及び吸気圧センサが上下２段となるように収納され、二股状に分岐したターミナルのターミナル配置部に対してそれぞれ電気的に接続されている。そして、このパッケージは、車両のエンジンルームに搭載され、大気圧導入路から取り込まれた大気が大気圧センサへと導かれ、吸気圧導入路から取り込まれた吸気が吸気圧センサへと導かれ、それぞれ圧力が検出される。 Further, in the pressure detection device according to Patent Document 2, the atmospheric pressure sensor and the intake pressure sensor are housed in the package so as to have two upper and lower stages, and are electrically connected to the terminal arrangement portion of the bifurcated terminal. It is connected to the. Then, this package is installed in the engine room of the vehicle, and the atmosphere taken in from the atmospheric pressure introduction path is guided to the atmospheric pressure sensor, and the intake air taken in from the intake pressure introduction path is guided to the intake pressure sensor. Pressure is detected for each.

国際公開第２００４／０７４６６１号International Publication No. 2004/074661 特開２００１−１７４３５５号公報Japanese Unexamined Patent Publication No. 2001-174355

しかしながら、特許文献１に係るセンサユニットでは、回路基板に対して上下となるようにそれぞれ吸気圧力センサ及び外気圧センサを異なる方向から接続する構成としているため、その接続作業が煩雑であり組付性が低下するという問題がある。 However, since the sensor unit according to Patent Document 1 is configured to connect the intake pressure sensor and the external pressure sensor from different directions so as to be up and down with respect to the circuit board, the connection work is complicated and the assembling property is easy. There is a problem that

また、特許文献２の構成では、上下２段に配置される大気圧センサ及び吸気圧センサに合せてターミナルを二股状に形成する必要があり、構造が複雑になることで製造コストが高騰してしまうと共に、一組のターミナル配置部に対してそれぞれ大気圧センサ及び吸気圧センサを接続する必要があるため、その接続作業が煩雑となり組付工数が増加してしまうという問題がある。 Further, in the configuration of Patent Document 2, it is necessary to form the terminal in a bifurcated shape according to the atmospheric pressure sensor and the intake pressure sensor arranged in the upper and lower two stages, and the manufacturing cost rises due to the complicated structure. In addition, since it is necessary to connect the atmospheric pressure sensor and the intake pressure sensor to each set of terminal arrangement portions, there is a problem that the connection work becomes complicated and the assembly time increases.

本発明は、前記の課題を考慮してなされたものであり、複数の圧力センサの組付性を向上できると共に製造コストの削減を図ることが可能なセンサユニットを提供することを目的とする。 The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a sensor unit capable of improving the assembling property of a plurality of pressure sensors and reducing the manufacturing cost.

前記の目的を達成するために、本発明は、ケーシングと、ケーシングの内部に配置される少なくとも２つの圧力センサとを備えたセンサユニットにおいて、
センサユニットは、２つの圧力センサが電気的に接続される複数の配線が配置される平面である基準配線面に平行に延在し複数の配線同士を互いに連結する複合配線部材を備え、
ケーシングは内壁面を備え、２つの圧力センサがそれぞれ内壁面と基準配線面との間に配置されると共に、圧力センサよりも配線側でそれぞれ配線に対して電気的に接続されており、
２つの圧力センサの感圧部は、それぞれ内壁面の少なくとも一部と圧力センサの少なくとも一部とによって囲まれる感圧空間に露呈し、感圧空間は、ケーシングに設けられる圧力通路を通じて内壁面とケーシングの外部とを連通しており、
センサユニットは、内燃機関の燃焼室に吸入される吸気が流通する吸気通路に接続され、２つの圧力センサのうちの一方は、吸気通路内の圧力を検出する吸気圧センサであり、圧力センサの他方は吸気通路の外部の圧力を検出する外気圧センサであると共に、
ケーシングの内部には、吸気の温度を検出する温度センサを備え、温度センサは、基準配線面よりも内壁面側に配置されると共に、圧力センサよりも配線側で配線に対して電気的に接続されている。
To achieve the above object, the present invention relates to a sensor unit comprising a casing and at least two pressure sensors located inside the casing.
The sensor unit includes a composite wiring member that extends parallel to a reference wiring surface, which is a plane on which a plurality of wirings to which two pressure sensors are electrically connected are arranged, and connects the plurality of wirings to each other.
The casing has an inner wall surface, and two pressure sensors are arranged between the inner wall surface and the reference wiring surface, respectively, and are electrically connected to the wiring on the wiring side of the pressure sensor.
The pressure-sensitive parts of the two pressure sensors are exposed to a pressure-sensitive space surrounded by at least a part of the inner wall surface and at least a part of the pressure sensor, and the pressure-sensitive space is exposed to the inner wall surface through a pressure passage provided in the casing. It communicates with the outside of the casing and
The sensor unit is connected to an intake passage through which the intake air sucked into the combustion chamber of the internal combustion engine flows, and one of the two pressure sensors is an intake pressure sensor that detects the pressure in the intake passage, and is a pressure sensor. The other is an external pressure sensor that detects the pressure outside the intake passage, as well as
Inside the casing, a temperature sensor that detects the temperature of the intake air is provided, and the temperature sensor is arranged on the inner wall surface side of the reference wiring surface and electrically connected to the wiring on the wiring side of the pressure sensor. Has been done .

本発明によれば、ケーシングの内部に少なくとも２つの圧力センサを有したセンサユニットにおいて、このケーシングは内壁面を有し、内壁面と複合配線部材との間に圧力センサがそれぞれ配置されると共に、圧力センサが複合配線部材の配線に対して電気的に接続されている。また、圧力センサの感圧部を、それぞれ内壁面の少なくとも一部と圧力センサの少なくとも一部とによって囲まれる感圧空間に露呈させ、この感圧空間が、ケーシングに設けられる圧力通路を通じて内壁面とケーシングの外部とを連通している。また、センサユニットが、内燃機関の燃焼室に吸入される吸気が流通する吸気通路に接続され、２つの圧力センサのうちの一方は、吸気通路内の圧力を検出する吸気圧センサであり、圧力センサの他方は吸気通路の外部の圧力を検出する外気圧センサであると共に、ケーシングの内部には、吸気の温度を検出する温度センサを備えており、温度センサが、基準配線面よりも内壁面側に配置されると共に、圧力センサよりも配線側で配線に対して電気的に接続されている。
According to the present invention, in a sensor unit having at least two pressure sensors inside the casing, the casing has an inner wall surface, and the pressure sensors are arranged between the inner wall surface and the composite wiring member, respectively. The pressure sensor is electrically connected to the wiring of the composite wiring member. Further, the pressure-sensitive portion of the pressure sensor is exposed to a pressure-sensitive space surrounded by at least a part of the inner wall surface and at least a part of the pressure sensor, and this pressure-sensitive space is exposed to the inner wall surface through a pressure passage provided in the casing. And the outside of the casing are communicated with each other. Further, the sensor unit is connected to an intake passage through which the intake air sucked into the combustion chamber of the internal combustion engine flows, and one of the two pressure sensors is an intake pressure sensor that detects the pressure in the intake passage. The other side of the sensor is an external pressure sensor that detects the pressure outside the intake passage, and inside the casing, a temperature sensor that detects the temperature of the intake air is provided, and the temperature sensor is located on the inner wall surface of the reference wiring surface. It is arranged on the side and is electrically connected to the wiring on the wiring side of the pressure sensor.

従って、センサユニットを構成する２つの圧力センサを、複合配線部材に対して同一方向から取り付け基準配線面に配置される配線に対してそれぞれ電気的に接続することができるため、回路基板に対して上下方向からそれぞれ吸気圧力センサ及び外気圧センサを接続している従来のセンサユニットと比較し、その接続作業及び組付作業を簡素化することができる。 Therefore, the two pressure sensors constituting the sensor unit can be electrically connected to the wiring arranged on the mounting reference wiring surface from the same direction with respect to the composite wiring member, so that the two pressure sensors can be electrically connected to the circuit board. Compared with the conventional sensor unit to which the intake pressure sensor and the external pressure sensor are connected from the vertical direction, the connection work and the assembly work can be simplified.

その結果、複数の圧力センサを有するセンサユニットの組付性を向上できると共に、特許文献２の圧力検出装置のように、上下２段に配置される大気圧センサ及び吸気圧センサに合せてターミナルを二股状に形成する必要がないため、構成を簡素化して製造コストの削減を図ることも可能となる。 As a result, the assemblability of the sensor unit having a plurality of pressure sensors can be improved, and the terminal can be arranged according to the atmospheric pressure sensor and the intake pressure sensor arranged in the upper and lower two stages like the pressure detection device of Patent Document 2. Since it is not necessary to form the bifurcated shape, it is possible to simplify the configuration and reduce the manufacturing cost.

本発明によれば、以下の効果が得られる。 According to the present invention, the following effects can be obtained.

すなわち、少なくとも２つの圧力センサを、ケーシング内において内壁面と複合配線部材との間にそれぞれ配置し、圧力センサを複合配線部材の配線に対して電気的に接続すると共に、圧力センサの感圧部を、それぞれ内壁面の少なくとも一部と圧力センサの少なくとも一部とによって囲まれる感圧空間へと露呈させ、この感圧空間をケーシングに設けられる圧力通路を通じて内壁面とケーシングの外部とを連通させることで、複数の圧力センサを、複合配線部材に対して同一方向から取り付けて電気的に接続できるため、従来のセンサユニットと比較し、組付性の向上を図ることができる。 That is, at least two pressure sensors are arranged between the inner wall surface and the composite wiring member in the casing, the pressure sensor is electrically connected to the wiring of the composite wiring member, and the pressure sensitive portion of the pressure sensor is provided. Is exposed to a pressure-sensitive space surrounded by at least a part of the inner wall surface and at least a part of the pressure sensor, and this pressure-sensitive space is communicated between the inner wall surface and the outside of the casing through a pressure passage provided in the casing. As a result, a plurality of pressure sensors can be attached to the composite wiring member from the same direction and electrically connected to each other, so that the assembling property can be improved as compared with the conventional sensor unit.

また、従来の圧力検出装置のように、ターミナルを上下２段に配置される大気圧センサ及び吸気圧センサに合せて二股状に形成する必要がないため、構成を簡素化して製造コストの削減を図ることができる。 In addition, unlike the conventional pressure detection device, it is not necessary to form the terminal in a bifurcated shape according to the atmospheric pressure sensor and the intake pressure sensor arranged in two stages above and below, so the configuration is simplified and the manufacturing cost is reduced. Can be planned.

本発明の実施の形態に係るセンサユニットを備えたスロットルバルブ装置の外観斜視図である。It is external perspective view of the throttle valve device provided with the sensor unit which concerns on embodiment of this invention. 図１のスロットルバルブ装置を構成するボディからセンサユニットを取り外した状態を示す分解斜視図である。FIG. 5 is an exploded perspective view showing a state in which the sensor unit is removed from the body constituting the throttle valve device of FIG. 1. 図３Ａは、図１に示すセンサユニットの断面図であり、図３Ｂは、図３ＡのＩＩＩＢ−ＩＩＩＢ線に沿った断面図である。3A is a cross-sectional view of the sensor unit shown in FIG. 1, and FIG. 3B is a cross-sectional view taken along the line IIIB-IIIB of FIG. 3A. 図４Ａは、図３ＡのＩＶＡ−ＩＶＡ線に沿った断面図であり、図４Ｂは、図１に示すスロットルバルブ装置をセンサユニット側から見た正面図である。4A is a cross-sectional view taken along the line IVA-IVA of FIG. 3A, and FIG. 4B is a front view of the throttle valve device shown in FIG. 1 as viewed from the sensor unit side.

本発明に係るセンサユニットについて好適な実施の形態を挙げ、添付の図面を参照しながら以下詳細に説明する。図１において、参照符号１０は、本発明の実施の形態に係るセンサユニットが用いられるスロットルバルブ装置を示す。 A preferred embodiment of the sensor unit according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a throttle valve device in which the sensor unit according to the embodiment of the present invention is used.

このスロットルバルブ装置（吸気制御装置）１０は、例えば、自動二輪車に搭載され、図１及び図２に示されるように、内燃機関に接続されるインレット配管と外気が導入されるエアダクトとの間に設けられ、ボディ１２と、該ボディ１２に回転自在に支持されるシャフト１４と、該シャフト１４に固定され前記ボディ１２の吸気通路１６に設けられるバルブ（弁体）１８と、前記ボディ１２の側部に設けられ複数のセンサが収納されたセンサユニット２０とを含む。 This throttle valve device (intake control device) 10 is mounted on, for example, a motorcycle, and as shown in FIGS. 1 and 2, between an inlet pipe connected to an internal combustion engine and an air duct into which outside air is introduced. A body 12, a shaft 14 rotatably supported by the body 12, a valve (valve body) 18 fixed to the shaft 14 and provided in the intake passage 16 of the body 12, and a side of the body 12. It includes a sensor unit 20 provided in the unit and accommodating a plurality of sensors.

ボディ１２は、例えば、金属製材料から形成され、その一端部から他端部に向かって断面円形状の吸気通路１６が貫通し、その一端部には前記吸気通路１６を内部に有した円筒状の吸気管２２が突出している。そして、吸気通路１６の上流側となる吸気管２２には図示しないエアダクトが接続され外気が導入される。 The body 12 is formed of, for example, a metal material, and an intake passage 16 having a circular cross section penetrates from one end portion to the other end portion thereof, and the one end portion has a cylindrical shape having the intake passage 16 inside. The intake pipe 22 of the above is protruding. Then, an air duct (not shown) is connected to the intake pipe 22 on the upstream side of the intake passage 16 to introduce outside air.

また、吸気通路１６は、ボディ１２の他端部に平面状に形成された第１取付面２４に下流側端部が開口している。そして、ボディ１２の第１取付面２４に図示しないインレット配管が接続されることで、吸気通路１６を通じて外気がインレット配管から内燃機関へと供給される。 Further, the intake passage 16 has a downstream end open to a first mounting surface 24 formed in a plane at the other end of the body 12. Then, by connecting an inlet pipe (not shown) to the first mounting surface 24 of the body 12, outside air is supplied from the inlet pipe to the internal combustion engine through the intake passage 16.

一方、ボディ１２の側部には、吸気通路１６の延在方向（矢印Ａ方向）と略平行に延在する第２取付面２６（図２参照）が形成され、略中央に開口した第１シャフト孔２８を介してシャフト１４の一端部が外部へと突出すると共に、前記第１シャフト孔２８に対して所定距離だけ離れて位置した挿入孔３０が形成される。この挿入孔３０は、第１シャフト孔２８と略平行に形成され吸気通路１６まで貫通している（図３Ｂ参照）。 On the other hand, on the side portion of the body 12, a second mounting surface 26 (see FIG. 2) extending substantially parallel to the extending direction (arrow A direction) of the intake passage 16 is formed, and the first opening substantially in the center. One end of the shaft 14 projects outward through the shaft hole 28, and an insertion hole 30 located at a predetermined distance from the first shaft hole 28 is formed. The insertion hole 30 is formed substantially parallel to the first shaft hole 28 and penetrates to the intake passage 16 (see FIG. 3B).

また、第２取付面２６は、第１シャフト孔２８及び挿入孔３０に対して近接する案内溝３４を有している。この案内溝３４は、吸気通路１６が延在する方向と平行に長尺となり、前記吸気通路１６側へ所定深さで窪むように形成されると共に、その一端部には、吸気通路１６内においてバルブ１８の下流側に連通した吸気圧検出孔３６が形成される。 Further, the second mounting surface 26 has a guide groove 34 close to the first shaft hole 28 and the insertion hole 30. The guide groove 34 is elongated in parallel with the direction in which the intake passage 16 extends, and is formed so as to be recessed toward the intake passage 16 at a predetermined depth, and at one end thereof, a valve is provided in the intake passage 16. An intake pressure detection hole 36 communicating with the downstream side of 18 is formed.

そして、第２取付面２６は、第１シャフト孔２８、挿入孔３０及び案内溝３４を取り囲むように形成されたシール溝３８を備え、このシール溝３８にシールリング（シール部材）４０が設けられる。 The second mounting surface 26 includes a seal groove 38 formed so as to surround the first shaft hole 28, the insertion hole 30, and the guide groove 34, and the seal ring (seal member) 40 is provided in the seal groove 38. ..

このシールリング４０は、例えば、弾性材料から形成され、シール溝３８へ装着された状態で第２取付面２６から若干だけ突出するように設けられると共に、センサユニット２０がボディ１２の第２取付面２６へと対向するように接続される際、後述するセンサユニット２０のユニット取付面６６と第２取付面２６との間に挟持されることでシールされる。 The seal ring 40 is formed of, for example, an elastic material and is provided so as to slightly protrude from the second mounting surface 26 in a state of being mounted in the seal groove 38, and the sensor unit 20 is provided on the second mounting surface of the body 12. When connected to the 26 so as to face each other, the sensor unit 20 is sealed by being sandwiched between the unit mounting surface 66 and the second mounting surface 26, which will be described later.

詳細には、シールリング４０は、図２に示されるように、第１シャフト孔２８の外周側を取り囲むように形成された環状の第１シール部位４２と、該第１シール部位４２に隣接し挿入孔３０の外側を取り囲むように形成された第２シール部位４４と、前記第１及び第２シール部位４２、４４に隣接し案内溝３４を取り囲む第４シール部位４８とが一体的に形成される。 Specifically, as shown in FIG. 2, the seal ring 40 is adjacent to an annular first seal portion 42 formed so as to surround the outer peripheral side of the first shaft hole 28 and the first seal portion 42. A second seal portion 44 formed so as to surround the outside of the insertion hole 30 and a fourth seal portion 48 adjacent to the first and second seal portions 42 and 44 and surrounding the guide groove 34 are integrally formed. To.

さらに、シールリング４０は、第２取付面２６の挿入孔３０よりも外縁側の面である包囲面３２を取り囲む第３シール部位４６が一体的に形成されており、前記第３シール部位４６は、吸気通路１６の延在する方向と直交する方向に長尺となるように包囲面３２を取り囲んでいる。 Further, in the seal ring 40, a third seal portion 46 that surrounds the surrounding surface 32, which is a surface on the outer edge side of the insertion hole 30 of the second mounting surface 26, is integrally formed, and the third seal portion 46 is formed. The surrounding surface 32 is surrounded so as to be elongated in a direction orthogonal to the extending direction of the intake passage 16.

また、吸気通路１６の内部には円盤状のバルブ１８が設けられ、その中央部が前記吸気通路１６の延在方向（矢印Ａ方向）と直交するように設けられたシャフト１４に連結される。このシャフト１４は、ボディ１２に対して図示しない軸受を介して回転自在に支持され、その一端部がボディ１２の第２取付面２６を介してから外側へ突出し、他端部が前記ボディ１２における反対側の側部へ突出してスロットルドラム５０が連結される。 Further, a disk-shaped valve 18 is provided inside the intake passage 16, and a central portion thereof is connected to a shaft 14 provided so as to be orthogonal to the extending direction (arrow A direction) of the intake passage 16. The shaft 14 is rotatably supported with respect to the body 12 via a bearing (not shown), one end of the shaft 14 projects outward through the second mounting surface 26 of the body 12, and the other end of the body 12. The throttle drum 50 is connected so as to project to the opposite side.

そして、車両における乗員のアクセル操作によってスロットルドラム５０に接続されたアクセルワイヤ（図示せず）が引っ張られることで、図示しないスプリングの弾発力に抗してシャフト１４及びバルブ１８が所定角度だけ回転する。 Then, the accelerator wire (not shown) connected to the throttle drum 50 is pulled by the accelerator operation of the occupant in the vehicle, so that the shaft 14 and the valve 18 rotate by a predetermined angle against the elastic force of a spring (not shown). To do.

センサユニット２０は、図２〜図４Ｂに示されるように、例えば、樹脂製材料から形成され、有底箱状に形成されたケーシング５２を有し、該ケーシング５２の底壁（内壁面）５４がボディ１２の第２取付面２６に臨むように設けられると共に、その角部に形成された２つの孔部５６に挿通されたボルト５８がボディ１２のねじ孔（図示せず）へと螺合されることで固定される。 As shown in FIGS. 2 to 4B, the sensor unit 20 has, for example, a casing 52 formed of a resin material and formed in a bottomed box shape, and the bottom wall (inner wall surface) 54 of the casing 52. Is provided so as to face the second mounting surface 26 of the body 12, and the bolts 58 inserted into the two holes 56 formed at the corners thereof are screwed into the screw holes (not shown) of the body 12. It is fixed by being done.

このケーシング５２は、底壁５４とは反対側（矢印Ｂ１方向）で該底壁５４に臨むように開口した開口部６０を有し、該開口部６０に対して板状の蓋部６２が装着される。そして、蓋部６２は、前記ケーシング５２の開口端部に対して熱溶着等によって固定されることで前記開口部６０が閉塞されると共に、該蓋部６２には、外部の空気の圧力をケーシング５２内へと伝えるための外気取込口（導入口）６４が開口している（図１及び図４Ｂ参照）。 The casing 52 has an opening 60 that opens so as to face the bottom wall 54 on the opposite side of the bottom wall 54 (in the direction of arrow B1), and a plate-shaped lid 62 is attached to the opening 60. Will be done. Then, the lid portion 62 is fixed to the opening end portion of the casing 52 by heat welding or the like to close the opening portion 60, and the lid portion 62 is casing with the pressure of external air. The outside air intake port (introduction port) 64 for transmitting to the inside of 52 is open (see FIGS. 1 and 4B).

また、ケーシング５２の底壁５４は、ボディ１２の第２取付面２６に対して対向するように配置されるユニット取付面（第２取付面）６６を有し、前記ユニット取付面６６の略中央部に形成されシャフト１４の他端部が挿通される第２シャフト孔６８（図２参照）と、該第２シャフト孔６８から離れて位置しボディ１２側（矢印Ｂ２方向）へと突出した温度検出管７０と、該温度検出管７０に対してユニット取付面６６の外縁側に位置する連通溝７２と、前記第２シャフト孔６８と前記温度検出管７０との間の近傍に開口した吸気圧検出通路７４とを有する。 Further, the bottom wall 54 of the casing 52 has a unit mounting surface (second mounting surface) 66 arranged so as to face the second mounting surface 26 of the body 12, and is substantially in the center of the unit mounting surface 66. A second shaft hole 68 (see FIG. 2) formed in the portion through which the other end of the shaft 14 is inserted, and a temperature that is located away from the second shaft hole 68 and protrudes toward the body 12 side (arrow B2 direction). The detection pipe 70, the communication groove 72 located on the outer edge side of the unit mounting surface 66 with respect to the temperature detection pipe 70, and the intake pressure opened in the vicinity between the second shaft hole 68 and the temperature detection pipe 70. It has a detection passage 74 and.

第２シャフト孔６８には、図２に示されるように、シャフト１４の開度（回転量）を検出可能な開度センサ（弁開度センサ）７６が収納され、センサユニット２０をボディ１２の第２取付面２６に固定した際、シャフト１４の他端部が挿通されて前記開度センサ７６と連結される。 As shown in FIG. 2, the second shaft hole 68 accommodates an opening sensor (valve opening sensor) 76 capable of detecting the opening (rotation amount) of the shaft 14, and the sensor unit 20 is housed in the body 12. When fixed to the second mounting surface 26, the other end of the shaft 14 is inserted and connected to the opening sensor 76.

温度検出管７０は、図２及び図３Ｂに示されるように中空状に形成され、その先端がボディ１２の挿入孔３０を通じて吸気通路１６内へと突出し、基端がケーシング５２の底壁５４を貫通して内部と連通し、その内部には後述する吸気温センサ７８（図３Ｂ参照）が収納される。 The temperature detection tube 70 is formed in a hollow shape as shown in FIGS. 2 and 3B, the tip of which protrudes into the intake passage 16 through the insertion hole 30 of the body 12, and the base end of the bottom wall 54 of the casing 52. It penetrates and communicates with the inside, and an intake air temperature sensor 78 (see FIG. 3B), which will be described later, is housed inside the inside.

連通溝７２は、図２〜図４Ａに示されるように、第２シャフト孔６８及び温度検出管７０の延在方向（矢印Ｂ２方向）と直交する方向に長尺なスリット状に形成され、底壁５４の厚さ方向に所定深さで窪んでいる。 As shown in FIGS. 2 to 4A, the communication groove 72 is formed in a long slit shape in a direction orthogonal to the extending direction (arrow B2 direction) of the second shaft hole 68 and the temperature detection tube 70, and has a bottom. It is recessed at a predetermined depth in the thickness direction of the wall 54.

また、連通溝７２は、センサユニット２０がボディ１２の第２取付面２６へと接続された際、ボディ１２の包囲面３２に臨み、且つ、略同一形状となるように形成されると共に、その外周側がシールリング４０の第３シール部位４６によって囲まれた状態で接続される（図４Ａ参照）。 Further, the communication groove 72 is formed so as to face the surrounding surface 32 of the body 12 and have substantially the same shape when the sensor unit 20 is connected to the second mounting surface 26 of the body 12. The outer peripheral side is connected in a state of being surrounded by the third seal portion 46 of the seal ring 40 (see FIG. 4A).

さらに、連通溝７２の延在方向に沿った一端部には、後述する第２感圧空間１２０に連通した第１外気圧検出通路８０が開口し、他端部には第２外気圧検出通路（外気圧連通路、中間通路）８２が開口している。 Further, a first external pressure detection passage 80 communicating with the second pressure-sensitive space 120, which will be described later, is opened at one end of the communication groove 72 along the extending direction, and a second external pressure detection passage 80 is opened at the other end. (Outside atmospheric pressure communication passage, intermediate passage) 82 is open.

すなわち、包囲面３２及び連通溝７２の外側に設けられた第３シール部位４６、第２取付面２６及びユニット取付面６６によって囲まれ、連通溝７２、第１及び第２外気圧検出通路８０、８２と連通して外気の供給される外気圧包囲空間８４が形成される。 That is, it is surrounded by the third seal portion 46, the second mounting surface 26, and the unit mounting surface 66 provided on the outside of the surrounding surface 32 and the communication groove 72, and the communication groove 72, the first and second external pressure detection passages 80, An outside air pressure surrounding space 84 in which outside air is supplied is formed in communication with 82.

吸気圧検出通路７４は、ボディ１２の案内溝３４に臨むように設けられ、ユニット取付面６６からケーシング５２の内部に向かって延在し、後述する第１感圧空間１１２と連通すると共に、センサユニット２０がボディ１２の第２取付面２６へと接続された際、シールリング４０の第４シール部位４８が前記吸気圧検出通路７４の開口部位を取り囲むように当接する（図３Ａ及び図３Ｂ参照）。 The intake pressure detection passage 74 is provided so as to face the guide groove 34 of the body 12, extends from the unit mounting surface 66 toward the inside of the casing 52, communicates with the first pressure-sensitive space 112 described later, and is a sensor. When the unit 20 is connected to the second mounting surface 26 of the body 12, the fourth seal portion 48 of the seal ring 40 abuts so as to surround the opening portion of the intake pressure detection passage 74 (see FIGS. 3A and 3B). ).

すなわち、吸気圧検出通路７４の外周側に設けられた第４シール部位４８、第２取付面２６及びユニット取付面６６によって囲まれ、前記吸気圧検出通路７４及び案内溝３４と連通して吸気通路１６から空気（吸気）の圧力が伝えられる吸気圧包囲空間８６が形成される。 That is, the intake passage is surrounded by the fourth seal portion 48, the second mounting surface 26, and the unit mounting surface 66 provided on the outer peripheral side of the intake pressure detection passage 74, and communicates with the intake pressure detection passage 74 and the guide groove 34. An intake pressure surrounding space 86 is formed in which the pressure of air (intake) is transmitted from 16.

なお、ボディ１２の第２取付面２６とケーシング５２のユニット取付面６６との間において、シールリング４０の第１シール部位４２によって囲まれる空間が、第２シャフト孔６８に収納される開度センサ７６を包囲する第１包囲空間８８となり、前記シールリング４０の第２シール部位４４によって囲まれる空間が、吸気温センサ７８が収納される温度検出管７０を包囲する第２包囲空間９０となる。すなわち、第１〜第４シール部位４２、４４、４６、４８が一体的に形成されたシールリング４０によって複数の包囲空間をボディ１２とケーシング５２との間に形成している。 The opening sensor in which the space between the second mounting surface 26 of the body 12 and the unit mounting surface 66 of the casing 52 and surrounded by the first sealing portion 42 of the seal ring 40 is housed in the second shaft hole 68. The first surrounding space 88 surrounds 76, and the space surrounded by the second sealing portion 44 of the seal ring 40 becomes the second surrounding space 90 surrounding the temperature detection tube 70 in which the intake air temperature sensor 78 is housed. That is, a plurality of surrounding spaces are formed between the body 12 and the casing 52 by the seal ring 40 in which the first to fourth seal portions 42, 44, 46, and 48 are integrally formed.

一方、ケーシング５２の内部には、基板（複合配線部材）９２と、該基板９２に接続される吸気圧センサ（圧力センサ）９４、外気圧センサ（圧力センサ）９６、吸気温センサ（温度センサ）７８及び開度センサ７６が収納され、前記基板９２は、ケーシング５２の開口部６０と底壁５４との間となる位置で、該底壁５４に対して略平行に固定される。 On the other hand, inside the casing 52, a substrate (composite wiring member) 92, an intake pressure sensor (pressure sensor) 94, an outside atmospheric pressure sensor (pressure sensor) 96, and an intake temperature sensor (temperature sensor) connected to the substrate 92. The 78 and the opening degree sensor 76 are housed, and the substrate 92 is fixed substantially parallel to the bottom wall 54 at a position between the opening 60 of the casing 52 and the bottom wall 54.

この基板９２は、例えば、複数の配線がプリントされたプリント基板からなり、その一端面には前記複数の配線を有した配線面（基準配線面）９８を有し、この配線面９８が、ケーシング５２の開口部６０側（矢印Ｂ１方向）となるように配置されると共に、ケーシング５２の側方に突出したコネクタ部１００のターミナルと電気的に接続されている。なお、コネクタ部１００には、図示しないハーネスを介してコントローラへと接続されるカプラーが装着されることで、前記コントローラと基板９２とが電気的に接続される。 The board 92 is made of, for example, a printed circuit board on which a plurality of wirings are printed, and one end surface thereof has a wiring surface (reference wiring surface) 98 having the plurality of wirings, and the wiring surface 98 is a casing. The 52 is arranged so as to be on the 60 side of the opening (in the direction of arrow B1), and is electrically connected to the terminal of the connector portion 100 projecting to the side of the casing 52. A coupler connected to the controller via a harness (not shown) is attached to the connector portion 100 to electrically connect the controller and the substrate 92.

吸気圧センサ９４は、吸気通路１６内の空気（吸気）の圧力を検出するために設けられ、その第１センサ本体１０２が底壁５４に臨むように基板９２と底壁５４との間に設けられると共に、該第１センサ本体１０２から延びる第１端子部１０４が、配線面９８に対して直交するように開口部６０側へと延在して基板９２と電気的に接続されている。 The intake pressure sensor 94 is provided to detect the pressure of air (intake) in the intake passage 16, and is provided between the substrate 92 and the bottom wall 54 so that the first sensor main body 102 faces the bottom wall 54. At the same time, the first terminal portion 104 extending from the first sensor main body 102 extends toward the opening 60 side so as to be orthogonal to the wiring surface 98 and is electrically connected to the substrate 92.

第１端子部１０４は、その先端が基板９２を貫通して配線面９８側（矢印Ｂ１方向）へと突出し、該基板９２の配線面９８に対して半田付け等の配線接続部１０６を介して電気的に接続されている。 The tip of the first terminal portion 104 penetrates the substrate 92 and projects toward the wiring surface 98 side (direction of arrow B1), and the first terminal portion 104 is soldered to the wiring surface 98 of the substrate 92 via a wiring connection portion 106 such as soldering. It is electrically connected.

また、第１センサ本体１０２には、その外縁部に底壁５４側（矢印Ｂ２方向）に向かって突出した脚部１０８と、該脚部１０８の内側となる略中央に形成され圧力を検出可能な第１感圧部１１０とを有し、前記脚部１０８が底壁５４に形成された凹部へと挿入されることで吸気圧センサ９４がケーシング５２へと固定される。 Further, the first sensor main body 102 is formed on the outer edge portion of the leg portion 108 protruding toward the bottom wall 54 side (direction of arrow B2) and substantially in the center inside the leg portion 108 to detect pressure. The intake pressure sensor 94 is fixed to the casing 52 by having the first pressure-sensitive portion 110 and the leg portion 108 being inserted into the recess formed in the bottom wall 54.

さらに、第１センサ本体１０２の第１感圧部１１０及び脚部１０８と底壁５４とで囲まれた第１感圧空間（吸気感圧空間）１１２を有し、この第１感圧空間１１２は、ユニット取付面６６に開口した吸気圧検出通路７４と連通すると共に、該吸気圧検出通路７４と連通したボディ１２の吸気圧検出孔３６を通じて吸気通路１６と連通している。 Further, it has a first pressure-sensitive space (intake pressure-sensitive space) 112 surrounded by a first pressure-sensitive portion 110, a leg portion 108, and a bottom wall 54 of the first sensor main body 102, and the first pressure-sensitive space 112. Communicates with the intake pressure detection passage 74 opened in the unit mounting surface 66, and also communicates with the intake passage 16 through the intake pressure detection hole 36 of the body 12 communicating with the intake pressure detection passage 74.

そして、吸気圧センサ９４は、第１感圧空間１１２における空気の圧力（吸気圧）を第１感圧部１１０で検出して電気信号へと変換した後、第１端子部１０４を介して基板９２へと出力する。 Then, the intake pressure sensor 94 detects the air pressure (intake pressure) in the first pressure-sensitive space 112 by the first pressure-sensitive unit 110, converts it into an electric signal, and then transmits the substrate via the first terminal unit 104. Output to 92.

外気圧センサ９６は、スロットルバルブ装置１０の外側における空気の圧力を検出するために設けられ、その第２センサ本体１１４が底壁５４に臨むように基板９２と底壁５４との間に設けられると共に、該第２センサ本体１１４から延びる第２端子部１１６が、配線面９８に対して直交するように開口部６０側へと延在して基板９２と電気的に接続されている。 The outside air pressure sensor 96 is provided to detect the pressure of air outside the throttle valve device 10, and is provided between the substrate 92 and the bottom wall 54 so that the second sensor main body 114 faces the bottom wall 54. At the same time, the second terminal portion 116 extending from the second sensor main body 114 extends toward the opening 60 side so as to be orthogonal to the wiring surface 98 and is electrically connected to the substrate 92.

第２端子部１１６は、吸気圧センサ９４の第１端子部１０４と同様に、その先端が基板９２を貫通して配線面９８側（矢印Ｂ１方向）へと突出し、該基板９２の配線面９８に対して半田付け等の配線接続部１０６を介して電気的に接続されている。 Similar to the first terminal portion 104 of the intake pressure sensor 94, the tip of the second terminal portion 116 penetrates the substrate 92 and projects toward the wiring surface 98 side (arrow B1 direction), and the wiring surface 98 of the substrate 92. It is electrically connected to the device via a wiring connection unit 106 such as soldering.

すなわち、吸気圧センサ９４及び外気圧センサ９６は、ケーシング５２内において、底壁５４に臨む位置に並ぶように配置され、基板９２に対して底壁５４に臨む他端面側（矢印Ｂ２方向）に第１及び第２センサ本体１０２、１１４がそれぞれ設けられ、第１及び第２端子部１０４、１１６を介してそれぞれ前記基板９２へと電気的に接続されている。 That is, the intake pressure sensor 94 and the external pressure sensor 96 are arranged in the casing 52 so as to face the bottom wall 54, and are on the other end surface side (arrow B2 direction) facing the bottom wall 54 with respect to the substrate 92. The first and second sensor main bodies 102 and 114 are provided, respectively, and are electrically connected to the substrate 92 via the first and second terminal portions 104 and 116, respectively.

また、第２センサ本体１１４には、その外縁部に底壁５４側（矢印Ｂ２方向）に向かって突出した脚部１０８と、該脚部１０８の内側となる略中央に形成され圧力を検出可能な第２感圧部１１８とを有し、前記脚部１０８が底壁５４に形成された凹部へと挿入されることで外気圧センサ９６がケーシング５２へと固定される。 Further, the second sensor main body 114 is formed on the outer edge portion of the leg portion 108 protruding toward the bottom wall 54 side (direction of arrow B2) and substantially in the center inside the leg portion 108 to detect pressure. The external pressure sensor 96 is fixed to the casing 52 by having the second pressure-sensitive portion 118 and the leg portion 108 being inserted into the recess formed in the bottom wall 54.

さらに、第２センサ本体１１４の第２感圧部１１８及び脚部１０８と底壁５４とで囲まれた第２感圧空間（外気感圧空間）１２０を有し、この第２感圧空間１２０は、ユニット取付面６６に開口した第１外気圧検出通路８０と連通している。 Further, it has a second pressure-sensitive space (outside air pressure-sensitive space) 120 surrounded by a second pressure-sensitive portion 118 and a leg portion 108 of the second sensor main body 114 and a bottom wall 54, and the second pressure-sensitive space 120. Communicates with the first external pressure detection passage 80 opened in the unit mounting surface 66.

この第１外気圧検出通路８０は、ユニット取付面６６において連通溝７２を介して第２外気圧検出通路８２と連通しており、該第２外気圧検出通路８２は、前記第１外気圧検出通路８０と略平行に開口部６０側（矢印Ｂ１方向）に向かって延在している。そして、第２外気圧検出通路８２は、開口部６０から所定距離だけ底壁５４側（矢印Ｂ２方向）となる位置で開口した中間導入口（中間口）１２２を有している（図４Ａ参照）。 The first outside air pressure detection passage 80 communicates with the second outside air pressure detection passage 82 via the communication groove 72 on the unit mounting surface 66, and the second outside air pressure detection passage 82 communicates with the first outside air pressure detection passage 82. It extends substantially parallel to the passage 80 toward the opening 60 side (direction of arrow B1). The second outside air pressure detection passage 82 has an intermediate introduction port (intermediate port) 122 opened at a position on the bottom wall 54 side (direction of arrow B2) by a predetermined distance from the opening 60 (see FIG. 4A). ).

そして、蓋部６２に開口した外気取込口６４を通じて空気（外気）の圧力がケーシング５２内へと伝わり、中間導入口１２２から第２外気圧検出通路８２、連通溝７２、第１外気圧検出通路８０を通じて第２感圧空間１２０へと伝達し、この第２感圧空間１２０における外気圧を、外気圧センサ９６の第２感圧部１１８で検出して電気信号へと変換した後、第２端子部１１６を介して基板９２へと出力する。 Then, the pressure of air (outside air) is transmitted into the casing 52 through the outside air intake port 64 opened in the lid portion 62, and the second outside air pressure detection passage 82, the communication groove 72, and the first outside air pressure detection are transmitted from the intermediate introduction port 122. It is transmitted to the second pressure-sensitive space 120 through the passage 80, and the external pressure in the second pressure-sensitive space 120 is detected by the second pressure-sensitive unit 118 of the external pressure sensor 96 and converted into an electric signal, and then the first It outputs to the board 92 via the two-terminal portion 116.

吸気温センサ７８は、図３Ｂに示されるように、温度検出管７０に臨むように底壁５４に設けられ、ケーシング５２の開口部６０側（矢印Ｂ１方向）に向かって延在した第３端子部１２４が基板９２を貫通して配線面９８から突出した状態で半田付け等によって電気的に接続される。そして、温度検出管７０の先端が挿入された吸気通路１６内の空気の温度が吸気温センサ７８によって検出され、第３端子部１２４から電気信号として基板９２へと出力される。 As shown in FIG. 3B, the intake air temperature sensor 78 is provided on the bottom wall 54 so as to face the temperature detection pipe 70, and is a third terminal extending toward the opening 60 side (arrow B1 direction) of the casing 52. The portion 124 is electrically connected by soldering or the like in a state where the portion 124 penetrates the substrate 92 and protrudes from the wiring surface 98. Then, the temperature of the air in the intake passage 16 into which the tip of the temperature detection tube 70 is inserted is detected by the intake air temperature sensor 78, and is output from the third terminal portion 124 to the substrate 92 as an electric signal.

開度センサ７６は、例えば、回転量を電気信号へと変換可能なポテンショメータからなり、その端子部（図示せず）が、基板９２と電気的に接続されている。そして、シャフト１４の回転量が開度センサ７６によって検出され、電気信号として基板９２へと出力されることで、該シャフト１４に連結されたバルブ１８の開度が検出される。 The opening sensor 76 is composed of, for example, a potentiometer capable of converting a rotation amount into an electric signal, and its terminal portion (not shown) is electrically connected to the substrate 92. Then, the amount of rotation of the shaft 14 is detected by the opening degree sensor 76 and output as an electric signal to the substrate 92, whereby the opening degree of the valve 18 connected to the shaft 14 is detected.

なお、開度センサ７６の端子部は、上述した吸気圧センサ９４、外気圧センサ９６及び吸気温センサ７８と同様に、基板９２の他端面から配線面９８側（矢印Ｂ１方向）に向かって貫通し、その突出した部位が前記配線面９８と配線接続部１０６を介して電気的に接続されている。 The terminal portion of the opening sensor 76 penetrates from the other end surface of the substrate 92 toward the wiring surface 98 side (direction of arrow B1), similarly to the above-mentioned intake pressure sensor 94, outside air pressure sensor 96, and intake temperature sensor 78. However, the protruding portion is electrically connected to the wiring surface 98 via the wiring connection portion 106.

すなわち、センサユニット２０を構成する吸気圧センサ９４、外気圧センサ９６、吸気温センサ７８及び開度センサ７６は、それぞれ底壁５４に臨む基板９２の他端面側（矢印Ｂ２方向）に配置され、その端子部が基板９２を貫通して配線接続部１０６を介して配線面９８へと電気的に接続されている。 That is, the intake pressure sensor 94, the outside air pressure sensor 96, the intake temperature sensor 78, and the opening degree sensor 76 constituting the sensor unit 20 are arranged on the other end surface side (direction of arrow B2) of the substrate 92 facing the bottom wall 54, respectively. The terminal portion penetrates the substrate 92 and is electrically connected to the wiring surface 98 via the wiring connection portion 106.

また、ケーシング５２の内部には、基板９２、吸気圧センサ９４、外気圧センサ９６、吸気温センサ７８及び開度センサ７６が収納され、該基板９２に対して電気的に接続された状態で、低粘度の樹脂製材料を流し込んで硬化させ封止する封止部１２６が設けられる。 A substrate 92, an intake pressure sensor 94, an outside atmospheric pressure sensor 96, an intake temperature sensor 78, and an opening degree sensor 76 are housed inside the casing 52, and are electrically connected to the substrate 92. A sealing portion 126 is provided in which a low-viscosity resin material is poured, cured, and sealed.

この封止部１２６は、例えば、電気的な絶縁性が良好であり、且つ、基板９２における配線の酸化を防止するための密閉性を備えるケーシング５２とは異なる樹脂製材料が用いられ、基板９２、吸気圧センサ９４、外気圧センサ９６、吸気温センサ７８及び開度センサ７６を覆うように充填され、第２外気圧検出通路８２の中間導入口１２２よりも低い位置となるように、ケーシング５２の底壁５４から開口部６０側に向かって所定高さまで充填される。 The sealing portion 126 is made of a resin material different from that of the casing 52, which has good electrical insulation and has airtightness for preventing the wiring on the substrate 92 from being oxidized. , The casing 52 is filled so as to cover the intake pressure sensor 94, the outside pressure sensor 96, the intake temperature sensor 78, and the opening degree sensor 76, and is located at a position lower than the intermediate introduction port 122 of the second outside pressure detection passage 82. It is filled to a predetermined height from the bottom wall 54 toward the opening 60 side.

これにより、基板９２の配線面９８における複数の配線が封止部１２６によって覆われることで、電気的な絶縁と密閉とが達成されると共に、ケーシング５２の内部には、封止部１２６と蓋部６２との間に所定容積の空間部（内部空間）１２８が形成される。この空間部１２８は、外気取込口６４から外気を導入可能な空間であり、且つ、中間導入口１２２と連通している。 As a result, the plurality of wirings on the wiring surface 98 of the substrate 92 are covered with the sealing portion 126, so that electrical insulation and sealing are achieved, and the sealing portion 126 and the lid are inside the casing 52. A space portion (internal space) 128 having a predetermined volume is formed between the portion 62 and the portion 62. The space portion 128 is a space in which outside air can be introduced from the outside air intake port 64, and communicates with the intermediate introduction port 122.

さらに、上述したセンサユニット２０を含むスロットルバルブ装置１０は、図４Ｂに示されるように、該センサユニット２０における外気取込口６４が、中間導入口（第２外気圧検出通路）１２２に対して重力方向下方（矢印Ｃ１方向）となるように配置された状態で、自動二輪車に搭載されて用いられる。 Further, in the throttle valve device 10 including the sensor unit 20 described above, as shown in FIG. 4B, the outside air intake port 64 in the sensor unit 20 is directed to the intermediate introduction port (second outside air pressure detection passage) 122. It is mounted on a motorcycle and used in a state where it is arranged so as to be downward in the direction of gravity (direction of arrow C1).

本発明の実施の形態に係るセンサユニット２０を有したスロットルバルブ装置１０は、基本的には以上のように構成されるものであり、次に前記センサユニット２０を構成する吸気圧センサ９４や吸気温センサ７８等によって空気の圧力や温度等を検出する場合について説明する。 The throttle valve device 10 having the sensor unit 20 according to the embodiment of the present invention is basically configured as described above, and then the intake pressure sensor 94 and the suction pressure sensor 94 constituting the sensor unit 20. A case where the air pressure, temperature, etc. are detected by the temperature sensor 78 or the like will be described.

先ず、乗員のアクセル操作によってシャフト１４が回動し、バルブ１８が吸気通路１６内で回動することで、前記バルブ１８と前記吸気通路１６との間を通じてエアダクトから取り込まれた外気がインレット配管を通じて内燃機関における燃焼室へと供給される。 First, the shaft 14 is rotated by the accelerator operation of the occupant, and the valve 18 is rotated in the intake passage 16, so that the outside air taken in from the air duct through the valve 18 and the intake passage 16 is passed through the inlet pipe. It is supplied to the combustion chamber in the internal combustion engine.

この際、シャフト１４の回転量が、連結された開度センサ７６が一体的に回転することで検出され、この回転量が電気信号として端子部から基板９２を介して図示しないコントローラへと出力されることで、該回転量に基づいてバルブ１８の開度（回転量）が検出される。 At this time, the amount of rotation of the shaft 14 is detected by the integral rotation of the connected opening sensor 76, and this amount of rotation is output as an electric signal from the terminal portion to a controller (not shown) via the substrate 92. As a result, the opening degree (rotation amount) of the valve 18 is detected based on the rotation amount.

また、吸気通路１６においてバルブ１８の下流側を流れる空気の圧力が、吸気圧検出孔３６から伝わり、案内溝３４、センサユニット２０の吸気圧検出通路７４を通じて第１感圧空間１１２へと伝達することで、吸気圧センサ９４の第１感圧部１１０によって吸気圧の圧力が検出される。そして、吸気通路１６内における空気（吸気）の圧力が、吸気圧センサ９４で電気信号へと変換され検出信号として第１端子部１０４から基板９２へと出力され、該基板９２から図示しないコントローラへと出力される。 Further, the pressure of the air flowing on the downstream side of the valve 18 in the intake passage 16 is transmitted from the intake pressure detection hole 36 and transmitted to the first pressure sensitive space 112 through the guide groove 34 and the intake pressure detection passage 74 of the sensor unit 20. As a result, the pressure of the intake pressure is detected by the first pressure sensitive unit 110 of the intake pressure sensor 94. Then, the air pressure (intake) in the intake passage 16 is converted into an electric signal by the intake pressure sensor 94 and output as a detection signal from the first terminal portion 104 to the substrate 92, and the substrate 92 to a controller (not shown). Is output.

さらに、吸気通路１６内における空気の温度が、該吸気通路１６内に露出した温度検出管７０を通じて吸気温センサ７８によって検出され、電気信号へと変換されて基板９２へと出力されると共に、該基板９２からコントローラへと出力される。 Further, the temperature of the air in the intake passage 16 is detected by the intake air temperature sensor 78 through the temperature detection tube 70 exposed in the intake passage 16, converted into an electric signal, and output to the substrate 92. It is output from the board 92 to the controller.

さらにまた、センサユニット２０の外部の空気の圧力が、蓋部６２の外気取込口６４を通じて空間部１２８へと伝わり、中間導入口１２２を通じて第２外気圧検出通路８２、連通溝７２、第１外気圧検出通路８０を経て、第２感圧空間１２０へと伝達することで、外気圧センサ９６の第２感圧部１１８によって外気圧（大気圧）の圧力が検出される。 Furthermore, the pressure of the air outside the sensor unit 20 is transmitted to the space 128 through the outside air intake port 64 of the lid 62, and the second outside air pressure detection passage 82, the communication groove 72, and the first through the intermediate introduction port 122. By transmitting to the second pressure-sensitive space 120 via the outside pressure detection passage 80, the pressure of the outside pressure (atmospheric pressure) is detected by the second pressure-sensitive portion 118 of the outside pressure sensor 96.

そして、センサユニット２０の外部における空気（外気）の圧力が、外気圧センサ９６において電気信号へと変換され検出信号として第２端子部１１６から基板９２へと出力された後、該基板９２から図示しないコントローラへと出力される。 Then, the pressure of air (outside air) outside the sensor unit 20 is converted into an electric signal by the outside air pressure sensor 96 and output as a detection signal from the second terminal portion 116 to the substrate 92, and then illustrated from the substrate 92. It is output to the controller that does not.

上述したようにセンサユニット２０を構成する吸気圧センサ９４、外気圧センサ９６、吸気温センサ７８及び開度センサ７６でそれぞれ検出された吸気圧、外気圧、吸気温度、バルブ１８の開度に基づいて、図示しないコントローラから制御信号を内燃機関へと出力することで、該内燃機関の燃焼制御が行われる。 As described above, based on the intake pressure, the outside pressure, the intake temperature, and the opening degree of the valve 18 detected by the intake pressure sensor 94, the outside air pressure sensor 96, the intake air temperature sensor 78, and the opening degree sensor 76, which constitute the sensor unit 20, respectively. By outputting a control signal from a controller (not shown) to the internal combustion engine, combustion control of the internal combustion engine is performed.

以上のように、本実施の形態では、ケーシング５２の内部に吸気圧センサ９４及び外気圧センサ９６の収納されたセンサユニット２０において、前記吸気圧センサ９４及び外気圧センサ９６が電気的に接続される基板９２を有し、この基板９２の配線面９８をケーシング５２の底壁５４とは反対側となるように配置し、前記底壁５４と前記基板９２との間となるように吸気圧センサ９４及び外気圧センサ９６をそれぞれ配置している。また、吸気圧センサ９４及び外気圧センサ９６の第１及び第２感圧部１１０、１１８を、底壁５４との間に囲まれた第１及び第２感圧空間１１２、１２０に露呈するように配置し、この第１感圧空間１１２を、吸気圧検出通路７４及び吸気圧検出孔３６を通じて吸気通路１６と連通させ、前記第２感圧空間１２０を、第１及び第２外気圧検出通路８０、８２を通じてセンサユニット２０の外部と連通させている。 As described above, in the present embodiment, the intake pressure sensor 94 and the outside air pressure sensor 96 are electrically connected in the sensor unit 20 in which the intake pressure sensor 94 and the outside air pressure sensor 96 are housed inside the casing 52. The intake pressure sensor is arranged so that the wiring surface 98 of the substrate 92 is opposite to the bottom wall 54 of the casing 52, and is between the bottom wall 54 and the substrate 92. 94 and an external pressure sensor 96 are arranged respectively. Further, the first and second pressure sensitive portions 110 and 118 of the intake pressure sensor 94 and the external pressure sensor 96 are exposed to the first and second pressure sensitive spaces 112 and 120 surrounded by the bottom wall 54. The first pressure-sensitive space 112 is communicated with the intake passage 16 through the intake pressure detection passage 74 and the intake pressure detection hole 36, and the second pressure-sensitive space 120 is connected to the first and second outside air pressure detection passages. It communicates with the outside of the sensor unit 20 through 80 and 82.

従って、センサユニット２０を構成する吸気圧センサ９４及び外気圧センサ９６という２つの圧力センサを、基板９２に対して同一方向から取り付けて第１及び第２端子部１０４、１１６を配線面９８に対してそれぞれ電気的に接続することが可能となる。そのため、回路基板に対して上下方向からそれぞれ吸気圧力センサ及び外気圧センサを接続している従来のセンサユニットと比較し、その接続作業及び組付作業を効率的に行うことができる。 Therefore, two pressure sensors, an intake pressure sensor 94 and an outside air pressure sensor 96, which constitute the sensor unit 20, are attached to the substrate 92 from the same direction, and the first and second terminal portions 104 and 116 are attached to the wiring surface 98. Each can be electrically connected. Therefore, as compared with the conventional sensor unit in which the intake pressure sensor and the external pressure sensor are connected to the circuit board from the vertical direction, respectively, the connection work and the assembly work can be performed efficiently.

その結果、複数の圧力センサを有するセンサユニット２０の組付性を向上できると共に、特許文献２のセンサユニットのように、上下２段に配置される大気圧センサ及び吸気圧センサに合せてターミナルを二股状に形成する必要がないため、構成を簡素化して製造コストの削減を図ることが可能となる。 As a result, the assemblability of the sensor unit 20 having a plurality of pressure sensors can be improved, and the terminal can be arranged according to the atmospheric pressure sensor and the intake pressure sensor arranged in the upper and lower two stages like the sensor unit of Patent Document 2. Since it is not necessary to form the bifurcated shape, it is possible to simplify the configuration and reduce the manufacturing cost.

例えば、ケーシング５２の底壁５４に対して吸気圧センサ９４及び外気圧センサ９６を配置した後に、前記底壁５４とは反対側となる開口部６０側から基板９２を前記吸気圧センサ９４及び外気圧センサ９６に対して組み付けて電気的に接続したり、吸気圧センサ９４及び外気圧センサ９６が予め電気的に接続された基板９２をケーシング５２内へと組み付けてもよい。 For example, after arranging the intake pressure sensor 94 and the outside air pressure sensor 96 with respect to the bottom wall 54 of the casing 52, the substrate 92 is attached to the intake pressure sensor 94 and the outside from the opening 60 side opposite to the bottom wall 54. It may be assembled to the atmospheric pressure sensor 96 and electrically connected, or the substrate 92 to which the intake pressure sensor 94 and the external pressure sensor 96 are electrically connected in advance may be assembled into the casing 52.

また、センサユニット２０において、上述した吸気圧センサ９４及び外気圧センサ９６に加え、ケーシング５２の内部に、吸気通路１６を流れる吸気の温度を検出する吸気温センサ７８を設け、この吸気温センサ７８を、基板９２に対して底壁５４側（矢印Ｂ２方向）に配置して該配線面９８に対して電気的に接続している。 Further, in the sensor unit 20, in addition to the above-mentioned intake pressure sensor 94 and outside air pressure sensor 96, an intake air temperature sensor 78 for detecting the temperature of the intake air flowing through the intake passage 16 is provided inside the casing 52, and the intake air temperature sensor 78 is provided. Is arranged on the bottom wall 54 side (in the direction of arrow B2) with respect to the substrate 92 and electrically connected to the wiring surface 98.

これにより、吸気温センサ７８を基板９２に対して吸気圧センサ９４及び外気圧センサ９６と同一方向から組み付けて接続可能となるため、該吸気温センサ７８を同一工程において接続することが可能となる。その結果、複数のセンサを有したセンサユニット２０のさらなる組付性の向上を実現できると同時に、製造コストのさらなる削減が可能となる。 As a result, the intake air temperature sensor 78 can be assembled and connected to the substrate 92 from the same direction as the intake pressure sensor 94 and the outside air pressure sensor 96, so that the intake air temperature sensor 78 can be connected in the same process. .. As a result, it is possible to further improve the assembling property of the sensor unit 20 having a plurality of sensors, and at the same time, further reduce the manufacturing cost.

さらに、センサユニット２０において、上述した吸気圧センサ９４及び外気圧センサ９６に加え、ケーシング５２の内部に、スロットルバルブ装置１０におけるバルブ１８の回転動作（開度）を検出可能な開度センサ７６を設け、この開度センサ７６を、基板９２の配線面９８よりも底壁５４側に配置して該配線面９８に対して電気的に接続している。これにより、開度センサ７６を、吸気圧センサ９４及び外気圧センサ９６と同一方向から基板９２に対して組み付けて電気的に接続可能となるため、該開度センサ７６を同一工程で接続することが可能となる。その結果、センサユニット２０のさらなる組付性の向上を実現できると同時に、製造コストのさらなる削減が可能となる。 Further, in the sensor unit 20, in addition to the intake pressure sensor 94 and the external pressure sensor 96 described above, an opening sensor 76 capable of detecting the rotational operation (opening) of the valve 18 in the throttle valve device 10 is provided inside the casing 52. The opening sensor 76 is provided so as to be arranged on the bottom wall 54 side of the wiring surface 98 of the substrate 92 and electrically connected to the wiring surface 98. As a result, the opening sensor 76 can be assembled to the substrate 92 from the same direction as the intake pressure sensor 94 and the external pressure sensor 96 and electrically connected to the substrate 92. Therefore, the opening sensor 76 is connected in the same process. Is possible. As a result, the assembling property of the sensor unit 20 can be further improved, and at the same time, the manufacturing cost can be further reduced.

さらにまた、センサユニット２０は、吸気通路１６を有したスロットルバルブ装置１０の第２取付面２６に対向するユニット取付面６６をケーシング５２に備え、前記第２取付面２６と前記ユニット取付面６６との間には、両者によって挟持されるシールリング４０を設けると共に、吸気圧センサ９４の第１感圧部１１０が露呈する第１感圧空間１１２と吸気通路１６とを、吸気圧検出通路７４によって連通させ、外気圧センサ９６の第２感圧部１１８が露呈する第２感圧空間１２０が、第１及び第２外気圧検出通路８０、８２を通じてケーシング５２の外部と連通している。 Furthermore, the sensor unit 20 includes a unit mounting surface 66 facing the second mounting surface 26 of the throttle valve device 10 having an intake passage 16 in the casing 52, and the second mounting surface 26 and the unit mounting surface 66. A seal ring 40 sandwiched between the two is provided, and the first pressure-sensitive space 112 and the intake passage 16 exposed by the first pressure-sensitive portion 110 of the intake pressure sensor 94 are separated by the intake pressure detection passage 74. The second pressure-sensitive space 120 exposed by the second pressure-sensitive portion 118 of the external pressure sensor 96 communicates with the outside of the casing 52 through the first and second external pressure detection passages 80 and 82.

また、吸気圧検出通路７４は、ボディ１２の第２取付面２６とケーシング５２のユニット取付面６６とシールリング４０とによって囲まれた吸気圧包囲空間８６と連通し、第１及び第２外気圧検出通路８０、８２が、ボディ１２の第２取付面２６とケーシング５２のユニット取付面６６とシールリング４０とによって囲まれた外気圧包囲空間８４と連通し、このケーシング５２には外気圧包囲空間８４からケーシング５２の内部を通過して該ケーシング５２の外部と連通する空間部１２８が設けられる。 Further, the intake pressure detection passage 74 communicates with the intake pressure surrounding space 86 surrounded by the second mounting surface 26 of the body 12, the unit mounting surface 66 of the casing 52, and the seal ring 40, and the first and second outside air pressures. The detection passages 80 and 82 communicate with the second mounting surface 26 of the body 12, the unit mounting surface 66 of the casing 52, and the external pressure surrounding space 84 surrounded by the seal ring 40, and the casing 52 has an external pressure surrounding space. A space 128 that passes through the inside of the casing 52 from 84 and communicates with the outside of the casing 52 is provided.

そのため、互いに対向するボディ１２の第２取付面２６とセンサユニット２０のユニット取付面６６との間に設けられた外気圧包囲空間８４に、第２感圧空間１２０に連通する第１外気圧検出通路８０と、ケーシング５２の外部と連通する第２外気圧検出通路８２とをそれぞれ接続して互いに連通させることで、前記ケーシング５２の外部からの水滴やダスト等の浸入を防止するための複雑なラビリンス構造を実現することができ、簡素な通路構成で外気圧センサ９６の第２感圧部１１８への水滴等の到達を確実に防止することができる。 Therefore, the first outside air pressure detection communicating with the second pressure sensitive space 120 in the outside air pressure surrounding space 84 provided between the second mounting surface 26 of the body 12 facing each other and the unit mounting surface 66 of the sensor unit 20. By connecting the passage 80 and the second outside air pressure detection passage 82 that communicates with the outside of the casing 52 and communicating with each other, it is complicated to prevent water droplets, dust, etc. from entering from the outside of the casing 52. A labyrinth structure can be realized, and a simple passage configuration can reliably prevent water droplets and the like from reaching the second pressure-sensitive portion 118 of the external pressure sensor 96.

またさらに、吸気圧センサ９４及び外気圧センサ９６と基板９２の配線面９８とを配線接続部１０６によってそれぞれ電気的に接続すると共に、ケーシング５２とは異なる材質からなる樹脂製材料で少なくとも前記基板９２を覆った封止部１２６を設け、且つ、前記ケーシング５２の底壁５４に臨む開口部６０を蓋部６２で閉塞し、前記封止部１２６と前記蓋部６２との間に空間部１２８を設けて外気取込口６４を通じて前記ケーシング５２の外部と連通させている。 Further, the intake pressure sensor 94 and the external pressure sensor 96 and the wiring surface 98 of the substrate 92 are electrically connected by the wiring connection portion 106, respectively, and at least the substrate 92 is made of a resin material different from the casing 52. A sealing portion 126 is provided, and an opening 60 facing the bottom wall 54 of the casing 52 is closed by a lid portion 62, and a space portion 128 is provided between the sealing portion 126 and the lid portion 62. It is provided so as to communicate with the outside of the casing 52 through the outside air intake port 64.

これにより、基板９２における配線面９８及び配線接続部１０６を封止部１２６によって覆うことで、電気的な絶縁と密閉とを達成することができると共に、従来からケーシング５２内において封止部１２６と蓋部６２との間に設けられていた空間部１２８を、外気圧センサ９６に臨む第２感圧空間１２０へと外気の圧力を伝えるための外気圧通路の一部として利用することで、新たな通路を形成することなく外部からの水滴やダスト等が外気圧センサ９６の第２感圧部１１８へと到達することを防止可能な構成を実現することが可能となる。 As a result, by covering the wiring surface 98 and the wiring connection portion 106 of the substrate 92 with the sealing portion 126, electrical insulation and sealing can be achieved, and the sealing portion 126 and the sealing portion 126 have been conventionally provided in the casing 52. By using the space 128 provided between the lid 62 as a part of the outside air pressure passage for transmitting the pressure of the outside air to the second pressure-sensitive space 120 facing the outside air pressure sensor 96, a new one is used. It is possible to realize a configuration capable of preventing water droplets, dust, etc. from the outside from reaching the second pressure-sensitive portion 118 of the external pressure sensor 96 without forming a simple passage.

また、外気圧包囲空間８４と空間部１２８とを連通させる第２外気圧検出通路８２を設け、この第２外気圧検出通路８２を、その端部に開口した中間導入口１２２を介して空間部１２８と連通させ、この空間部１２８を、前記第２外気圧検出通路８２とは別に形成された蓋部６２の外気取込口６４を介して前記ケーシング５２の外部と連通させている。そして、センサユニット２０がスロットルバルブ装置１０に接続された状態において、前記中間導入口１２２が前記外気取込口６４よりも重力方向に沿った上方（矢印Ｃ２方向）に配置されている。 Further, a second outside air pressure detection passage 82 for communicating the outside air pressure surrounding space 84 and the space portion 128 is provided, and the second outside air pressure detection passage 82 is provided in the space portion via an intermediate introduction port 122 opened at the end thereof. It communicates with 128, and the space 128 communicates with the outside of the casing 52 via an outside air intake port 64 of the lid 62 formed separately from the second outside air pressure detection passage 82. Then, in a state where the sensor unit 20 is connected to the throttle valve device 10, the intermediate introduction port 122 is arranged above the outside air intake port 64 along the gravity direction (arrow C2 direction).

これにより、重力方向において中間導入口１２２と外気取込口６４とに高低差を設けて配置することで、例えば、ケーシング５２の空間部１２８に水滴が浸入した場合でも、上方に配置された中間導入口１２２から外気圧センサ９６の第２感圧部１１８へと水滴が浸入してしまうことが防止され、下方（矢印Ｃ１方向）に配置された外気取込口６４から好適に外部へと排出できる。 As a result, by arranging the intermediate introduction port 122 and the outside air intake port 64 with a height difference in the direction of gravity, for example, even if water droplets intrude into the space 128 of the casing 52, the intermediate is arranged above. Water droplets are prevented from entering the second pressure-sensitive portion 118 of the outside air pressure sensor 96 from the introduction port 122, and are preferably discharged to the outside from the outside air intake port 64 arranged below (in the direction of arrow C1). it can.

なお、本発明に係るセンサユニット２０は、上述の実施の形態に限らず、本発明の要旨を逸脱することなく、種々の構成を採り得ることはもちろんである。 It should be noted that the sensor unit 20 according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without departing from the gist of the present invention.

１０…スロットルバルブ装置１２…ボディ
１６…吸気通路２０…センサユニット
３２…包囲面４０…シールリング
５２…ケーシング５４…底壁
６２…蓋部６４…外気取込口
６６…ユニット取付面７２…連通溝
７４…吸気圧検出通路８０…第１外気圧検出通路
８２…第２外気圧検出通路８４…外気圧包囲空間
８６…吸気圧包囲空間９２…基板
９４…吸気圧センサ９６…外気圧センサ
９８…配線面１０６…配線接続部
１１０…第１感圧部１１２…第１感圧空間
１１８…第２感圧部１２０…第２感圧空間
１２６…封止部１２８…空間部 10 ... Throttle valve device 12 ... Body 16 ... Intake passage 20 ... Sensor unit 32 ... Surrounding surface 40 ... Seal ring 52 ... Casing 54 ... Bottom wall 62 ... Lid part 64 ... Outside air intake port 66 ... Unit mounting surface 72 ... Communication groove 74 ... Intake pressure detection passage 80 ... First external pressure detection passage 82 ... Second external pressure detection passage 84 ... External pressure surrounding space 86 ... Intake pressure surrounding space 92 ... Board 94 ... Intake pressure sensor 96 ... External pressure sensor 98 ... Wiring Surface 106 ... Wiring connection part 110 ... First pressure sensitive part 112 ... First pressure sensitive space 118 ... Second pressure sensitive part 120 ... Second pressure sensitive space 126 ... Sealing part 128 ... Space part

Claims

In a sensor unit comprising a casing and at least two pressure sensors located inside the casing.
The sensor unit includes a composite wiring member that extends parallel to a reference wiring surface, which is a plane on which a plurality of wirings to which the two pressure sensors are electrically connected are arranged, and connects the plurality of wirings to each other. ,
The casing includes an inner wall surface, and the two pressure sensors are arranged between the inner wall surface and the reference wiring surface, respectively, and the wiring side of the pressure sensor is electrically connected to the wiring. Connected and
The pressure-sensitive portions of the two pressure sensors are exposed in a pressure-sensitive space surrounded by at least a part of the inner wall surface and at least a part of the pressure sensor, and the pressure-sensitive space is the pressure provided in the casing. The inner wall surface and the outer surface of the casing are communicated with each other through a passage .
The sensor unit is connected to an intake passage through which intake air sucked into the combustion chamber of the internal combustion engine flows, and one of the two pressure sensors is an intake pressure sensor that detects the pressure in the intake passage. The other of the pressure sensors is an external atmospheric pressure sensor that detects the pressure outside the intake passage, and also
Inside the casing, a temperature sensor for detecting the temperature of the intake air is provided, and the temperature sensor is arranged on the inner wall surface side of the reference wiring surface and on the wiring side of the pressure sensor. A sensor unit that is electrically connected to the wiring.

In a sensor unit comprising a casing and at least two pressure sensors located inside the casing.
The sensor unit includes a composite wiring member that extends parallel to a reference wiring surface, which is a plane on which a plurality of wirings to which the two pressure sensors are electrically connected are arranged, and connects the plurality of wirings to each other. ,
The casing includes an inner wall surface, and the two pressure sensors are arranged between the inner wall surface and the reference wiring surface, respectively, and the wiring side of the pressure sensor is electrically connected to the wiring. Connected and
The pressure-sensitive portions of the two pressure sensors are exposed in a pressure-sensitive space surrounded by at least a part of the inner wall surface and at least a part of the pressure sensor, and the pressure-sensitive space is the pressure provided in the casing. The inner wall surface and the outer surface of the casing are communicated with each other through a passage.
The sensor unit has an intake pipe that forms at least a part of an intake passage through which intake air to be sucked into a combustion chamber of an internal combustion engine flows, and is an intake control device including a valve body that adjusts the passage area of the intake passage. Connected to
One of the two pressure sensors is an intake pressure sensor that detects the pressure inside the intake passage, and the other of the pressure sensors is an outside air pressure sensor that detects the pressure outside the intake passage.
Inside the casing, a valve opening sensor for detecting the rotational operation of the valve body is provided, and the valve opening sensor is arranged on the inner wall surface side of the reference wiring surface and from the pressure sensor. Is also a sensor unit that is electrically connected to the wiring on the wiring side.

In a sensor unit comprising a casing and at least two pressure sensors located inside the casing.
The sensor unit includes a composite wiring member that extends parallel to a reference wiring surface, which is a plane on which a plurality of wirings to which the two pressure sensors are electrically connected are arranged, and connects the plurality of wirings to each other. ,
The casing includes an inner wall surface, and the two pressure sensors are arranged between the inner wall surface and the reference wiring surface, respectively, and the wiring side of the pressure sensor is electrically connected to the wiring. Connected and
The pressure-sensitive portions of the two pressure sensors are exposed in a pressure-sensitive space surrounded by at least a part of the inner wall surface and at least a part of the pressure sensor, and the pressure-sensitive space is the pressure provided in the casing. The inner wall surface and the outer surface of the casing are communicated with each other through a passage.
The casing is attached to a base unit having an internal space, and is attached to the base unit.
One of the two pressure sensors is an internal pressure sensor that detects the pressure inside the internal space, and the other of the pressure sensors is an external pressure sensor that detects the pressure outside the internal space.
The base unit has a first mounting surface, and the casing includes a second mounting surface that is arranged to face the first mounting surface when the casing is connected to the base unit.
The second mounting surface is at least a part of the outer peripheral surface of the casing, and is sandwiched between the first mounting surface and the second mounting surface by the first mounting surface and the second mounting surface. Is provided with a sealing member
The pressure passages include an internal pressure detection passage communicating with the internal pressure-sensitive space, which is the pressure-sensitive space where the pressure-sensitive portion of the internal pressure sensor is exposed, and the external, which is the pressure-sensitive space where the pressure-sensitive portion of the external pressure sensor is exposed. It consists of an external pressure detection passage that communicates with the pressure-sensitive space.
The internal pressure detection passage communicates with the internal space via an internal pressure surrounding space surrounded by the first mounting surface, the second mounting surface, and the sealing member.
The external pressure detection passage communicates with the external pressure surrounding space surrounded by the first mounting surface, the second mounting surface, and the sealing member, and passes through the inside of the casing from the external pressure surrounding space to the casing. A sensor unit provided with an external pressure communication passage that communicates with the outside of the casing.

In the sensor unit according to claim 3,
The base unit has an intake pipe that forms at least a part of an intake passage through which intake air to be sucked into a combustion chamber of an internal combustion engine flows.
The internal space is the intake passage,
The internal pressure sensor is an intake pressure sensor.
The external pressure sensor is an external pressure sensor.
The internal pressure-sensitive space is an intake pressure-sensitive space.
The internal pressure detection passage is an intake pressure detection passage, and is
The external pressure-sensitive space is an outside air pressure-sensitive space.
The external pressure detection passage is an external pressure detection passage.
The internal pressure surrounding space is an intake pressure surrounding space, and is
The external pressure surrounding space is an external pressure surrounding space, and is
A sensor unit in which the external pressure communication passage is an external pressure communication passage.

In the sensor unit according to claim 4,
It has a wiring connection portion that electrically connects the two pressure sensors and the composite wiring member to the plurality of wirings, and at least the composite wiring member is covered with a resin material different from the material constituting the casing. Wiring
The casing includes an opening that opens toward the side facing the inner wall surface and a lid that closes the opening, and is between the sealing portion covered with the resin material and the lid. Is a sensor unit having an internal space communicating with the outside of the casing, and at least a part of the external pressure communication passage is composed of the internal space.

In the sensor unit according to claim 5,
At least a part of the external pressure communication passage is an intermediate passage that communicates from the external pressure surrounding space to the internal space.
The intermediate passage communicates with the internal space through an intermediate port, the internal space communicates with the outside of the casing by an introduction passage different from the intermediate passage, and the introduction passage communicates with the internal space and the lid. It communicates with the introduction port that opens in the part,
A sensor unit in which the intermediate port is arranged above the introduction port in the direction of gravity when the sensor unit is connected to the intake passage.