JP2002295282A - Air intake device for internal combustion engine - Google Patents
Air intake device for internal combustion engineInfo
- Publication number
- JP2002295282A JP2002295282A JP2001094178A JP2001094178A JP2002295282A JP 2002295282 A JP2002295282 A JP 2002295282A JP 2001094178 A JP2001094178 A JP 2001094178A JP 2001094178 A JP2001094178 A JP 2001094178A JP 2002295282 A JP2002295282 A JP 2002295282A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- pipe
- pressure
- elastic member
- pressure sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、内燃機関の吸気装
置に関する。The present invention relates to an intake device for an internal combustion engine.
【0002】[0002]
【従来の技術】内燃機関の吸気装置として、吸気管に燃
料噴射する燃料噴射弁と、吸気管の吸気流量を可変にす
る弁体と、吸気管壁に一体化されたコントロールボック
スとを備えたものがある(特開平11−294216号
公報)。2. Description of the Related Art As an intake device for an internal combustion engine, a fuel injection valve for injecting fuel into an intake pipe, a valve body for varying the intake flow rate of the intake pipe, and a control box integrated with the intake pipe wall are provided. (Japanese Patent Application Laid-Open No. 11-294216).
【0003】特開平11−294216号公報による
と、コントロールボックスには、基板と、この基板に配
置されるとともに、弁体下流の吸気圧を検出する吸気圧
検出手段を備える。According to Japanese Patent Application Laid-Open No. H11-294216, the control box is provided with a board and an intake pressure detecting means arranged on the board and for detecting an intake pressure downstream of the valve element.
【0004】この吸気圧検出手段は、基板下面に配設さ
れた吸気管負圧センサであって、この吸気管負圧センサ
は、一方が吸気管内に開口する導入孔に対向配置されて
おり、導入孔を形成する円筒状壁に、ゴムチューブ等の
筒状弾性部材を介して、固定されている。[0004] The intake pressure detecting means is an intake pipe negative pressure sensor disposed on the lower surface of the substrate, and one of the intake pipe negative pressure sensors is arranged to face an introduction hole opened in the intake pipe. It is fixed to a cylindrical wall forming an introduction hole via a cylindrical elastic member such as a rubber tube.
【0005】[0005]
【発明が解決しようとする課題】上述の従来構成では、
吸気圧検出手段である吸気管負圧センサと、吸気管との
組付性を向上させる配慮が十分でない。すなわち、吸気
管負圧センサを、ホース状の弾性部材を介して、導入孔
を形成する円筒状壁の外周に接続しようとするため、吸
気管負圧センサを円筒状壁に組付ける際、盲作業となる
ので、組付作業の効率が悪い。In the above-mentioned conventional configuration,
Insufficient consideration has been given to improving the assemblability of the intake pipe negative pressure sensor, which is the intake pressure detection means, and the intake pipe. That is, in order to connect the intake pipe negative pressure sensor to the outer periphery of the cylindrical wall forming the introduction hole via a hose-shaped elastic member, when the intake pipe negative pressure sensor is attached to the cylindrical wall, blindness is caused. Since it is a work, the efficiency of the assembly work is low.
【0006】また、吸気管負圧センサの先端部であるセ
ンシングパイプが細い場合には、導入孔を大きくするの
に限度があるので、先端部に接続する上記弾性部材の内
周、またはこの弾性部材に接続する導入孔の内周への結
露の付着や、内燃機関の燃焼により生じたスラッジ等の
堆積により、圧力検出不能になる可能性がある。When the sensing pipe, which is the tip of the intake pipe negative pressure sensor, is thin, there is a limit in increasing the size of the introduction hole. Therefore, the inner circumference of the elastic member connected to the tip or this elastic member is not limited. Pressure may not be detected due to adhesion of dew on the inner circumference of the introduction hole connected to the member, or accumulation of sludge or the like generated by combustion of the internal combustion engine.
【0007】本発明は、このような事情を考慮してなさ
れたものであり、したがって、その目的は、吸気圧検出
手段と吸気管との組付性を向上しつつ、結露の付着、内
燃機関生成物の堆積等による吸気圧検出不能を防止でき
る内燃機関の吸気装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and accordingly, it is an object of the present invention to improve the assemblability of an intake pressure detecting means and an intake pipe while adhering dew condensation and an internal combustion engine. It is an object of the present invention to provide an intake device for an internal combustion engine that can prevent detection of intake pressure due to accumulation of products or the like.
【0008】[0008]
【課題を解決するための手段】本発明の請求項1によれ
ば、吸気通路を形成する吸気管と、吸気管内に回転自在
に支承され、吸気通路の開口面積を可変にする弁体と、
弁体の下流側の吸気圧を検出する吸気圧検出手段と、吸
気圧検出手段と電気的に接続する基板とを有するコント
ロールボックスとを備えた内燃機関の吸気装置におい
て、吸気圧検出手段は、基板の下面に配設され、先端に
センシングパイプを有する負圧センサからなり、かつ吸
気管には、吸気管内に開口する圧力導入管が負圧センサ
と対向する位置に設けられており、センシングパイプ側
の負圧センサの下面と圧力導入管との間に弾性部材が挟
み込まれるようにして、負圧センサが圧力導入管に押圧
固定されている。According to the first aspect of the present invention, there is provided an intake pipe forming an intake passage, a valve body rotatably supported in the intake pipe, and having a variable opening area of the intake passage.
In an intake device for an internal combustion engine including an intake pressure detection unit that detects an intake pressure on the downstream side of a valve element and a control box having a board that is electrically connected to the intake pressure detection unit, the intake pressure detection unit includes: The suction pipe includes a negative pressure sensor disposed on the lower surface of the substrate and having a sensing pipe at the tip, and a pressure introduction pipe that opens into the intake pipe is provided at a position facing the negative pressure sensor in the intake pipe. The negative pressure sensor is pressed and fixed to the pressure introducing tube such that the elastic member is sandwiched between the lower surface of the negative pressure sensor on the side and the pressure introducing tube.
【0009】これにより、吸気圧検出手段である負圧セ
ンサと、吸気管、特に圧力導入管との組付けの際、負圧
センサの下面と圧力導入管との間に弾性部材が挟み込ま
れるようにすることで、負圧センサが圧力導入管に押圧
固定可能である。このため、負圧センサと圧力導入管の
それぞれの外周に、弾性部材の弾性を利用して、ホース
状の弾性部材の内周を嵌め合せる組付作業に比べて、盲
作業が不要となり、組付性向上が可能である。Thus, when the negative pressure sensor as the intake pressure detecting means is assembled with the intake pipe, particularly the pressure introducing pipe, the elastic member is sandwiched between the lower surface of the negative pressure sensor and the pressure introducing pipe. By doing so, the negative pressure sensor can be pressed and fixed to the pressure introducing pipe. This eliminates the need for blind work as compared with the assembling work in which the inner periphery of the hose-shaped elastic member is fitted to the outer periphery of each of the negative pressure sensor and the pressure introducing pipe by using the elasticity of the elastic member. Adhesion can be improved.
【0010】本発明の請求項2によれば、弾性部材は、
平板状に形成され、圧力導入管に当接する端面部に、圧
力導入管の軸方向荷重が加えられている。According to the second aspect of the present invention, the elastic member includes:
An axial load of the pressure introducing pipe is applied to an end face formed in a flat plate shape and abutting on the pressure introducing pipe.
【0011】これにより、弾性部材は、平板状の簡素な
形状で形成されるので、例えばゴム材等の弾性部材の特
性に起因する製造過程における変形の影響が緩和でき
る。このため、負圧センサと圧力導入管との組付けの際
に、弾性部材の製造上の形状精度の良し悪しを考慮する
ことなく、圧力導入管に当接する端面部つまり弾性部材
に、圧力導入管軸方向の荷重を、容易に加えることが可
能である。Thus, the elastic member is formed in a simple flat plate shape, so that the influence of deformation in the manufacturing process due to the characteristics of the elastic member such as a rubber material can be reduced. For this reason, when assembling the negative pressure sensor and the pressure introducing pipe, the pressure is applied to the end face portion that is in contact with the pressure introducing pipe, that is, the elastic member, without considering whether the shape accuracy of the elastic member in manufacturing is good or bad. A load in the tube axis direction can be easily applied.
【0012】本発明の請求項3によれば、コントロール
ボックスは、吸気管の外壁と一体的に形成されるもので
あって、基板が外壁に固定されるとき、基板は、負圧セ
ンサを介して、弾性部材を圧力導入管に押圧する。According to the third aspect of the present invention, the control box is formed integrally with the outer wall of the intake pipe, and when the substrate is fixed to the outer wall, the substrate is connected via the negative pressure sensor. Then, the elastic member is pressed against the pressure introducing tube.
【0013】このため、負圧センサと圧力導入管との間
に挟み込まれる弾性部材を介して、基板により負圧セン
サが圧力導入管に押圧されるので、負圧センサの下面と
圧力導入管との間に挟み込まれる弾性部材は、確実に押
圧固定される。For this reason, the negative pressure sensor is pressed against the pressure introducing pipe by the substrate via the elastic member sandwiched between the negative pressure sensor and the pressure introducing pipe, so that the lower surface of the negative pressure sensor and the pressure introducing pipe are connected to each other. The elastic member sandwiched between them is securely pressed and fixed.
【0014】本発明の請求項4によれば、センシングパ
イプは、前記弾性部材を貫通して突出している。According to the fourth aspect of the present invention, the sensing pipe projects through the elastic member.
【0015】吸気管内の吸気圧、すなわち吸気管内を流
動する流体である吸入空気の圧力を、吸気管に設けた圧
力導入管内の圧力で測定する場合において、一般に、吸
気管内を流動する空気が圧力導入管内に流入する際、圧
力導入管の中心部ほど流入速度が大きく、逆に、中心部
から離れた圧力導入管内を形成する壁部、すなわち圧力
導入管内の内周、および圧力導入管内に面する弾性部材
の表面近傍に近づくほど、流入速度が遅くなる。このた
め、内燃機関の生成物の一部であるスラッジ等が圧力導
入管の内周または弾性部材の表面に堆積し易い。また、
同様に結露も、圧力導入管の内周または弾性部材の表面
に付着し易い。When the intake pressure in the intake pipe, that is, the pressure of the intake air which is a fluid flowing in the intake pipe, is measured by the pressure in the pressure introduction pipe provided in the intake pipe, the air flowing in the intake pipe generally has a pressure of When flowing into the introduction pipe, the inflow velocity is higher at the center of the pressure introduction pipe, and conversely, the wall that forms the inside of the pressure introduction pipe away from the center, that is, the inner periphery of the pressure introduction pipe, and the surface inside the pressure introduction pipe The closer to the surface of the elastic member, the lower the inflow speed. For this reason, sludge or the like, which is a part of the product of the internal combustion engine, easily accumulates on the inner periphery of the pressure introducing pipe or the surface of the elastic member. Also,
Similarly, condensation easily adheres to the inner periphery of the pressure introducing tube or the surface of the elastic member.
【0016】これに対して、圧力を感知するセンシング
パイプを弾性部材から突出させるので、センシングパイ
プ、特にその先端部は、圧力導入管の中心部側への配置
が可能である。したがって、負圧センサ、とくにセンシ
ングパイプは、内燃機関生成物の堆積、結露の付着等が
生じにくい位置に配置されるので、圧力検出不能の防止
が可能である。On the other hand, since the sensing pipe for sensing the pressure is projected from the elastic member, the sensing pipe, particularly its tip, can be arranged at the center of the pressure introducing pipe. Therefore, the negative pressure sensor, particularly the sensing pipe, is arranged at a position where accumulation of products of the internal combustion engine, adhesion of dew condensation, and the like are unlikely to occur.
【0017】本発明の請求項5によれば、本発明を適用
する内燃機関の吸気装置は、吸気圧検出手段として、先
端にセンシングパイプを有する負圧センサを備えている
ものに好適である。According to claim 5 of the present invention, the intake device for an internal combustion engine to which the present invention is applied is suitable for an intake device provided with a negative pressure sensor having a sensing pipe at the tip as an intake pressure detecting means.
【0018】すなわち、負圧センサは、センシングパイ
プを弾性部材の中央部に挿入し、圧力導入管とともに弾
性部材を挟み込んで押圧固定するだけでよいので、セン
シングパイプの大小に係らず、圧力導入管の内部を拡
大、とくに径方向に拡大が可能である。In other words, the negative pressure sensor only needs to insert the sensing pipe into the center of the elastic member, sandwich the elastic member together with the pressure introducing pipe, and press and fix the elastic member. It is possible to enlarge the inside of the inside, especially in the radial direction.
【0019】このため、例えば、内燃機関生成物の堆
積、結露の付着等による圧力検出不能の防止が容易であ
る。For this reason, it is easy to prevent the pressure from being undetectable due to, for example, accumulation of internal combustion engine products and adhesion of dew.
【0020】[0020]
【発明の実施の形態】以下、本発明の内燃機関の吸気装
置を具体化した実施形態を、図面に従って説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying an intake device for an internal combustion engine according to the present invention will be described below with reference to the drawings.
【0021】図1は、本発明の実施形態の内燃機関の吸
気装置の概略構成を表す断面図である。図2は、図1中
の本発明の要部である吸気圧検出手段の周りを表すII
の円内を拡大した断面図である。FIG. 1 is a sectional view showing a schematic configuration of an intake device for an internal combustion engine according to an embodiment of the present invention. FIG. 2 is a view II around the intake pressure detecting means which is a main part of the present invention in FIG.
It is sectional drawing which expanded the inside of the circle.
【0022】図1に示すように、吸気装置は、吸気絞り
装置1と、エアフィルタ200と、内燃機関300、特
にインテークマニホルド300aとを含んで構成されて
いる。なお、この吸気装置は、内燃機関300の運転状
態に応じて吸気流量を可変にできるものであればよく、
後述の吸気流量を可変にできる吸気絞り装置1だけであ
ってもよい。エアフィルタ200と内燃機関300のイ
ンテークマニホルド300aは、周知の構造を有するも
のである。As shown in FIG. 1, the intake device includes an intake throttle device 1, an air filter 200, and an internal combustion engine 300, in particular, an intake manifold 300a. The intake device may be any device that can vary the intake flow rate according to the operating state of the internal combustion engine 300.
Only the intake throttle device 1 that can change the intake flow rate described later may be used. The air filter 200 and the intake manifold 300a of the internal combustion engine 300 have a known structure.
【0023】吸気絞り装置1は、車両への搭載状態にお
いて、吸気上流側がエアフィルタ200を備える吸気ダ
クト(図示せず)に気密に接合され、また吸気下流側が
インテークマニホルド300aを有する内燃機関300
と気密に連通している。In the intake throttle device 1, when mounted on a vehicle, the upstream side of the air intake is airtightly joined to an intake duct (not shown) having an air filter 200, and the internal combustion engine 300 has an intake manifold 300a at the downstream side of the intake air.
And airtight communication.
【0024】この吸気絞り装置1は、図1に示すよう
に、吸気通路10aを形成する吸気管(以下、弁ハウジ
ングと呼ぶ)10と、弁ハウジング10内に回転自在に
支承された弁軸20と、弁軸20に固定され、吸気通路
10aの開口面積を可変にする弁体30と、吸気通路1
0aを流れる流動体である吸入空気(以下、吸気と呼
ぶ)の状態を検出する検出手段を備えたコントロールボ
ックス50とを含んで構成されている。As shown in FIG. 1, the intake throttle device 1 has an intake pipe (hereinafter referred to as a valve housing) 10 forming an intake passage 10a, and a valve shaft 20 rotatably supported in the valve housing 10. A valve body 30 fixed to the valve shaft 20 and varying the opening area of the intake passage 10a;
The control box 50 is provided with a detecting means for detecting a state of intake air (hereinafter, referred to as intake air) which is a fluid flowing through the airflow path 0a.
【0025】まず、弁ハウジング10は、略円筒状の吸
気管をなし、その吸気管の内部には吸気通路10aを形
成している。First, the valve housing 10 forms a substantially cylindrical intake pipe, and an intake passage 10a is formed inside the intake pipe.
【0026】この弁ハウジング10は、図1に示すよう
に、吸気通路10aを形成する外周壁部11と、コント
ロールボックス50を樹脂材料等にて一体的に形成し、
後述の基板を固定する筐体壁部12と、吸気の状態を検
出する吸気圧検出手段Pを保持する圧力導入管15とを
含んで構成されいる。In the valve housing 10, as shown in FIG. 1, an outer peripheral wall 11 forming an intake passage 10a and a control box 50 are integrally formed of a resin material or the like.
It is configured to include a housing wall portion 12 for fixing a substrate, which will be described later, and a pressure introduction pipe 15 for holding intake pressure detecting means P for detecting a state of intake air.
【0027】外周壁部11は、図1に示す如く円形の吸
気通路断面を形成するように、所定の肉厚で形成されて
いる。The outer peripheral wall 11 is formed with a predetermined thickness so as to form a circular intake passage cross section as shown in FIG.
【0028】筐体壁部12は、外周壁部11とともに、
コントロールボックス50の底蓋部50aを形成し、こ
の底蓋部50aと後述の上蓋59とからなるコントロー
ルボックス50の筐体を形成する。The housing wall 12 and the outer peripheral wall 11
A bottom cover 50a of the control box 50 is formed, and a casing of the control box 50 including the bottom cover 50a and an upper cover 59 described later is formed.
【0029】なお、この筐体壁部12は、コントロール
ボックス50内に収容される基板51を螺合部材58等
により固定するボス部12aを有しており、コントロー
ルボックス50は、弁ハウジング10、特に筐体壁部1
2と一体的に形成されている。The housing wall 12 has a boss 12a for fixing the board 51 housed in the control box 50 with a screwing member 58 or the like. Especially the housing wall 1
2 are formed integrally.
【0030】圧力導入管15は、図1に示すように、外
周壁部11、特に底蓋部50aに設けられ、弁体30の
下流側の吸気圧が検出できる位置に配置されている。こ
の圧力導入管15には、一方が吸気通路10aに開口す
る導入孔15aを有し、他方は、ゴム材等の弾性部材7
0を介して、吸気圧検出手段Pを気密に保持している。As shown in FIG. 1, the pressure introducing pipe 15 is provided on the outer peripheral wall portion 11, particularly on the bottom cover portion 50a, and is arranged at a position on the downstream side of the valve body 30 where the intake pressure can be detected. One of the pressure introducing pipes 15 has an introducing hole 15a opened to the intake passage 10a, and the other has an elastic member 7 made of rubber or the like.
0, the intake pressure detecting means P is kept airtight.
【0031】なお、吸気圧力手段Pを気密に保持する構
造の詳細については後述する。The structure for keeping the intake pressure means P airtight will be described later in detail.
【0032】次に、弁軸20は、略円柱形状をなし、弁
ハウジング10(詳しくは外周壁部11)内に回転自在
に支承されている。この弁軸20は、外部から弁軸20
を回動する外力が加わる構成となっている。Next, the valve shaft 20 has a substantially cylindrical shape, and is rotatably supported in the valve housing 10 (specifically, the outer peripheral wall portion 11). The valve shaft 20 is externally connected to the valve shaft 20.
Is applied.
【0033】なお、この外力が加わる構成としては、弁
軸20の両端部の一方に、外部から回転力を伝達するレ
バー(図示せず)が固定されており、このレバーに例え
ば車両上のアクセルペダルの動きに連動するアクセルワ
イヤを係合させる構成あるいは、弁軸20に加える外力
として、レバーを介したアクセルペダルに連動した機械
的外力に限らず、弁軸20を回転自在に駆動する駆動モ
ータ(図示せず)等による電気的外力を用いた構成のい
ずれであってもよい。As a structure to which the external force is applied, a lever (not shown) for transmitting a rotational force from the outside is fixed to one of both ends of the valve shaft 20. A drive motor that rotatably drives the valve shaft 20 without being limited to a configuration in which an accelerator wire that is linked to the movement of the pedal is engaged or an external force applied to the valve shaft 20 is not limited to a mechanical external force that is linked to the accelerator pedal via a lever. (Not shown) or any other configuration using an external electric force.
【0034】次に、弁体30は、吸気通路10aの開口
面積を可変にできるように、弁軸20に固定され、弁軸
20とともに回転自在に吸気通路10a内に配置されて
いる。これにより、吸気通路10a内を流れる吸気流量
が弁体30により調節できる。Next, the valve body 30 is fixed to the valve shaft 20 so that the opening area of the intake passage 10a can be changed, and is disposed in the intake passage 10a so as to be rotatable together with the valve shaft 20. Thus, the flow rate of intake air flowing through the intake passage 10a can be adjusted by the valve body 30.
【0035】コントロールボックス50は、基板51
と、吸気圧検出手段Pと、上蓋59と、底蓋部50aと
を含んで構成されている。The control box 50 includes a board 51
, An intake pressure detecting means P, an upper lid 59, and a bottom lid 50a.
【0036】基板51は、図1に示すように、半導体等
の電子部品55が両面に実装されており、吸気圧検出手
段Pとは電気的に接続されている。As shown in FIG. 1, an electronic component 55 such as a semiconductor is mounted on both sides of the substrate 51, and is electrically connected to the intake pressure detecting means P.
【0037】なお、この基板51は、図示しないリード
オンリメモリ(ROM)、ランダムアクセスメモリ(R
AM)、マイクロプロセッサ(CPU)、入力ポート3
5、および出力ポート36を相互に双方向性バスで接続
した公知の構成のマイクロコンピュータとして構成され
ていてもよい。The substrate 51 includes a read only memory (ROM) and a random access memory (R) (not shown).
AM), microprocessor (CPU), input port 3
5 and the output port 36 may be configured as a microcomputer having a known configuration in which they are connected to each other by a bidirectional bus.
【0038】吸気圧検出手段Pは、基板51の下面に配
設され、図1に示す先端にセンシングパイプ60aを有
する負圧センサ60からなり、圧力導入管15に対向し
て配置されている。なお、このセンシングパイプ60a
は、圧力を感知する感知部である。The intake pressure detecting means P is disposed on the lower surface of the substrate 51 and comprises a negative pressure sensor 60 having a sensing pipe 60a at the tip shown in FIG. The sensing pipe 60a
Is a sensing unit for sensing pressure.
【0039】なお、吸気圧検出手段Pは、負圧センサ6
0から送信される負圧検出信号をコントロールボックス
50内の基板51に送信され、基板1内のマイクロコン
ピュータで負圧検出信号を判定して吸気圧を測定する構
成に限らず、負圧センサ60(詳しくは、負圧センサ6
0から出力されるアナログ信号から吸気圧を測定)だけ
でもよい。本実施形態では、以下、吸気圧検出手段Pを
負圧センサ60で説明する。The intake pressure detecting means P is provided with a negative pressure sensor 6
The negative pressure detection signal transmitted from the control box 50 is transmitted to the substrate 51 in the control box 50, and the microcomputer in the substrate 1 determines the negative pressure detection signal to measure the intake pressure. (Specifically, the negative pressure sensor 6
Measurement of the intake air pressure from the analog signal output from 0). In the present embodiment, the intake pressure detecting means P will be described below using the negative pressure sensor 60.
【0040】上蓋59は、図1に示すように平板状に形
成されて、底蓋部50aに充填された樹脂モールド等充
填材57を封止するように、底蓋部50aである筐体壁
部12に固定されている。The upper lid 59 is formed in a flat plate shape as shown in FIG. 1, and is a casing wall as the bottom lid 50a so as to seal the filler 57 such as a resin mold filled in the bottom lid 50a. It is fixed to the part 12.
【0041】なお、充填材57は、防水性および耐振性
を向上するために充填される。The filler 57 is filled to improve waterproofness and vibration resistance.
【0042】ここで、本発明の要部である弁体30の下
流側の吸気圧を検出する吸気圧検出手段P、つまり吸気
絞り装置1の吸気流量を調整後の吸気圧を検出する吸気
圧手段P(詳しくは、負圧センサと、吸気管10(詳し
くは、圧力導入管15))との組付性を向上しつつ、結
露の付着、内燃機関生成物の堆積等による吸気圧検出手
段Pの圧力検出不能を防止する構造上の特徴について、
以下説明する。Here, an intake pressure detecting means P for detecting the intake pressure on the downstream side of the valve body 30, which is a main part of the present invention, that is, an intake pressure for detecting the intake pressure after adjusting the intake flow rate of the intake throttle device 1. Means P (specifically, a negative pressure sensor and intake pipe 10 (specifically, pressure introduction pipe 15)) while improving the assemblability, and detecting the intake pressure by adhesion of dew condensation, accumulation of products of the internal combustion engine, and the like. Regarding the structural features that prevent P from being unable to detect pressure,
This will be described below.
【0043】まず、圧力導入管15に導入される吸気に
対して、吸気圧力手段Pすなわち負圧センサ60を気密
に保持する構成を説明する。First, a configuration for keeping the intake pressure means P, that is, the negative pressure sensor 60 airtight, with respect to the intake air introduced into the pressure introducing pipe 15 will be described.
【0044】図2に示すように、負圧センサ60は、圧
力導入管15との間に弾性部材70を挟み込んで、押圧
荷重Fが矢印方向に加えられる。このとき、押圧荷重F
に応じた弾性部材70の変形により、負圧センサ60と
圧力導入管15とを気密に保持できる。As shown in FIG. 2, the negative pressure sensor 60 sandwiches the elastic member 70 between the negative pressure sensor 60 and the pressure introducing pipe 15, and applies a pressing load F in the direction of the arrow. At this time, the pressing load F
The negative pressure sensor 60 and the pressure introducing pipe 15 can be kept airtight by the deformation of the elastic member 70 according to the above.
【0045】なお、弾性部材70には、圧力センサ60
のセンシングパイプ60aが挿入可能な挿入孔70cを
設けている。The elastic member 70 has a pressure sensor 60
Is provided with an insertion hole 70c into which the sensing pipe 60a can be inserted.
【0046】押圧荷重Fについては、圧力導入管15に
導入される吸気の圧力が大気圧または大気圧以下である
ので、負圧センサ60と圧力導入管15のそれぞれに当
接する弾性部材70の当接部70a、70bが、変形を
生じてシール可能となる程度の荷重でよい。With respect to the pressing load F, since the pressure of the intake air introduced into the pressure introducing pipe 15 is equal to or lower than the atmospheric pressure, the negative pressure sensor 60 and the elastic member 70 which comes into contact with the pressure introducing pipe 15 respectively. The load may be such that the contact portions 70a and 70b are deformed and can be sealed.
【0047】このため、圧力センサ60と圧力導入管1
5との間に、平板状の弾性部材70が挟み込まれて押圧
荷重Fは比較的小さな荷重でよいので、圧力センサ60
と圧力導入管15とを気密に組付ける組付作業が容易に
できる。Therefore, the pressure sensor 60 and the pressure introducing pipe 1
5, the pressing load F may be a relatively small load because the flat elastic member 70 is interposed therebetween.
And the pressure introducing pipe 15 can be easily assembled in an airtight manner.
【0048】次に、押圧荷重Fを発生させる構成につい
て説明する。Next, a configuration for generating the pressing load F will be described.
【0049】図1に示すように、負圧センサ60は、基
板51の下面に配設される構成であり、基板51を筐体
壁部12に固定するためのボス部12aの上面の高さに
比べて、押圧荷重Fがまだ加わっていないときの図1に
示す負圧センサ60の上面の高さが所定量だけ高い構成
とする。As shown in FIG. 1, the negative pressure sensor 60 is arranged on the lower surface of the substrate 51, and the height of the upper surface of the boss 12 a for fixing the substrate 51 to the housing wall 12. 1, the height of the upper surface of the negative pressure sensor 60 shown in FIG. 1 when the pressing load F has not yet been applied is higher by a predetermined amount.
【0050】これにより、基板51を筐体壁部12に固
定するとき、押圧荷重Fとして、基板51は、負圧セン
サ60、弾性部材70、圧力導入管15のそれぞれに、
所定量に対応して基板51の変形に要した荷重を作用さ
せることができる。Thus, when the substrate 51 is fixed to the housing wall 12, the substrate 51 is applied to the negative pressure sensor 60, the elastic member 70, and the pressure introducing pipe 15 as the pressing load F.
The load required to deform the substrate 51 can be applied corresponding to the predetermined amount.
【0051】また、弾性部材70は、図2に示すよう
に、平板状に形成され、その外周70dが圧力導入管1
5の段差部15bと、圧力導入管15の径方向に遊嵌可
能に配置されている。The elastic member 70 is formed in a flat plate shape as shown in FIG.
5 and the pressure introducing pipe 15 are arranged so as to be freely fitted in the radial direction.
【0052】このため、負圧センサ60、弾性部材7
0、圧力導入管15を組付作業が容易となる。For this reason, the negative pressure sensor 60, the elastic member 7
0. The assembling work of the pressure introducing pipe 15 becomes easy.
【0053】すなわち、負圧センサ60と弾性部材70
を予め組付けられている場合、または負圧センサ60に
弾性部材70が設けられている場合には、弾性部材70
の外周70dと遊嵌する段差部15bを目視確認して組
付けるので、組付作業性が向上する。また、負圧センサ
60が基板51に予め固定されている場合であっても、
遊嵌する外周70dと段差部15bとの径方向隙間量
が、基板51と筐体壁部12とを固定する際の径方向の
組付けズレ量より大きく設定すれば、盲作業状態を考慮
することなく、容易に組付け可能である。That is, the negative pressure sensor 60 and the elastic member 70
When the elastic member 70 is provided in advance, or when the negative pressure sensor 60 is provided with the elastic member 70, the elastic member 70
Since the step portion 15b that fits loosely with the outer periphery 70d of the member is visually checked and assembled, the workability of the assembly is improved. Further, even when the negative pressure sensor 60 is fixed to the substrate 51 in advance,
If the amount of radial gap between the outer periphery 70d to be loosely fitted and the step portion 15b is set to be larger than the amount of radial displacement when the substrate 51 and the housing wall portion 12 are fixed, the blind work state is considered. And can be easily assembled.
【0054】さらに、弾性部材70は、平板状の簡素な
形状で形成されるので、例えばゴム材等の弾性部材70
の特性に起因する製造過程における変形の影響が緩和で
きる。このため、負圧センサ60と圧力導入管15との
組付けの際に、弾性部材70の製造上の形状精度の良し
悪しを考慮することなく、圧力導入管15に当接する当
接部である端面部70bに、圧力導入管15の軸方向の
荷重Fを、容易に加えることが可能である。Further, since the elastic member 70 is formed in a simple flat plate shape, for example, the elastic member 70 such as a rubber material is used.
The effect of deformation in the manufacturing process due to the characteristics of the above can be reduced. Therefore, when assembling the negative pressure sensor 60 and the pressure introducing pipe 15, it is a contact part that comes into contact with the pressure introducing pipe 15 without considering the quality of the shape of the elastic member 70 during manufacturing. The load F in the axial direction of the pressure introducing pipe 15 can be easily applied to the end face portion 70b.
【0055】また、図1、2に示すように、センシング
パイプ60aは、弾性部材70より突出しているので、
結露の付着、内燃機関生成物の堆積等による吸気圧検出
手段Pの圧力検出不能を防止することができる。As shown in FIGS. 1 and 2, since the sensing pipe 60 a protrudes from the elastic member 70,
It is possible to prevent the pressure detection of the intake pressure detecting means P from being impossible due to adhesion of dew condensation, accumulation of products of the internal combustion engine, and the like.
【0056】すなわち、一般に、吸気管10内を流動す
る流体である吸入空気の圧力を、吸気管10に設けた圧
力導入管15内の圧力で測定する場合において、一般
に、吸気管10内を流動する空気が圧力導入管15内に
流入する際、圧力導入管15の中心部ほど流入速度が大
きく、逆に、中心部から離れた圧力導入管15内を形成
する壁部15c、すなわち圧力導入管15内の内周15
h、および圧力導入管15内に面する弾性部材70の表
面70h近傍に近づくほど、流入速度が遅くなる。この
ため、内燃機関300の生成物の一部であるスラッジ等
が内周15hまたは表面70hに堆積し易い。また、同
様に結露も、内周15hまたは表面70hに付着し易
い。That is, when the pressure of the intake air, which is the fluid flowing in the intake pipe 10, is generally measured by the pressure in the pressure introducing pipe 15 provided in the intake pipe 10, the flow in the intake pipe 10 is generally increased. When the flowing air flows into the pressure introducing pipe 15, the inflow velocity is higher at the center of the pressure introducing pipe 15, and conversely, the wall 15 c forming the inside of the pressure introducing pipe 15 away from the center, that is, the pressure introducing pipe Inner circumference 15 within 15
h, and the closer to the vicinity of the surface 70h of the elastic member 70 facing the inside of the pressure introducing pipe 15, the lower the inflow velocity. Therefore, sludge or the like, which is a part of the product of the internal combustion engine 300, easily accumulates on the inner circumference 15h or the surface 70h. Similarly, condensation easily adheres to the inner circumference 15h or the surface 70h.
【0057】これに対して、圧力を感知するセンシング
パイプ60aを弾性部材70から突出させるので、セン
シングパイプ60aは、圧力導入管15の中心部側へ配
置が可能である。したがって、センシングパイプ60a
は、内燃機関生成物の堆積、結露の付着等が生じにくい
位置に配置されるので、圧力検出不能の防止が可能であ
る。On the other hand, since the sensing pipe 60a for sensing the pressure is projected from the elastic member 70, the sensing pipe 60a can be arranged at the center of the pressure introducing pipe 15. Therefore, the sensing pipe 60a
Is disposed at a position where deposition of internal combustion engine products, adhesion of dew condensation, and the like are unlikely to occur, so that it is possible to prevent undetectable pressure.
【0058】さらに、弾性部材70は、センシングパイ
プ60aが挿入される挿入孔70cの位置を、図1,2
に示すように、中央部に設ける。Further, the elastic member 70 adjusts the position of the insertion hole 70c into which the sensing pipe 60a is inserted, as shown in FIGS.
As shown in the figure, it is provided at the center.
【0059】このため、負圧センサ60は、センシング
パイプ60aを弾性部材70の中央部に挿入し、圧力導
入管15ともに弾性部材70を挟み込んで押圧固定する
だけでよいので、センシングパイプ70aの大小に係ら
ず、圧力導入管15すなわち導入孔15aを径方向に拡
大することが可能である。For this reason, the negative pressure sensor 60 only needs to insert the sensing pipe 60a into the center of the elastic member 70 and sandwich the elastic member 70 together with the pressure introducing pipe 15 and press and fix it. Regardless, the pressure introduction pipe 15, that is, the introduction hole 15a can be enlarged in the radial direction.
【0060】したがって、内燃機関生成物の堆積、結露
の付着等による圧力検出不能の防止が容易である。Therefore, it is easy to prevent the pressure from being undetectable due to the accumulation of internal combustion engine products and the adhesion of dew.
【0061】(変形例)上述の実施形態で説明した押圧
荷重Fを発生させる構成は、以下の変形例による構成と
しても、同様な効果を得ることができる。(Modification) The same effect can be obtained with the configuration for generating the pressing load F described in the above-described embodiment, even if the configuration according to the following modification is used.
【0062】第1の変形例としては、負圧センサ60と
基板51との間に、非導電性材料である樹脂材等で形成
された袋ナット状の螺合部材を設けて、この螺合部材が
圧力導入管15の外周に螺合する構成とする。As a first modified example, a cap nut-shaped screwing member made of a resin material or the like which is a non-conductive material is provided between the negative pressure sensor 60 and the substrate 51, and this screwing is performed. The member is configured to be screwed to the outer periphery of the pressure introducing pipe 15.
【0063】これにより、螺合により生じる軸力を、押
圧荷重Fとして、負圧センサ60、弾性部材70、圧力
導入管15のそれぞれの当接部に作用させることができ
る。Thus, the axial force generated by the screwing can be applied to the respective contact portions of the negative pressure sensor 60, the elastic member 70, and the pressure introducing pipe 15 as the pressing load F.
【0064】第2の変形例としては、負圧センサ60に
フランジ部を設けて、圧力導入管15の壁部15cと嵌
合等により固定してもよい。なお、例えば嵌合の場合に
は、弾性部材がシールするのに必要な変形分を考慮し
て、軸方向に挿入嵌合すればよい。As a second modified example, a flange may be provided on the negative pressure sensor 60 and fixed to the wall 15c of the pressure introducing pipe 15 by fitting or the like. In the case of fitting, for example, the elastic member may be inserted and fitted in the axial direction in consideration of the deformation required for sealing.
【0065】第3の変形例としては、負圧センサ60自
体を、円筒形状に形成して、圧力導入管15の外周に螺
合する構成としてもよい。As a third modification, the negative pressure sensor 60 itself may be formed in a cylindrical shape and screwed to the outer periphery of the pressure introducing pipe 15.
【図1】本発明の実施形態の吸気装置の概略構成を表す
断面図である。FIG. 1 is a cross-sectional view illustrating a schematic configuration of an intake device according to an embodiment of the present invention.
【図2】図1中の本発明の要部である吸気圧検出手段の
周りを表すIIの円内を拡大した断面図である。FIG. 2 is an enlarged cross-sectional view of the inside of a circle II showing the periphery of an intake pressure detecting means which is a main part of the present invention in FIG.
1 吸気絞り装置 10 弁ハウジング(吸気管) 10a 吸気通路 11 外周壁部 12(12a) 筐体壁部 、(筐体壁部12のうち、
基板51を固定するボス部) 13 座部 15 圧力導入管 15a 導入孔 15b 段差部(弾性部材70を径方向に遊嵌する段差
部) 15c 壁部 15h 内周 20 弁軸 30 弁体 50 コントロールボックス 51 基板 60 負圧センサ(吸気圧検出手段P) 60a センシングパイプ 70 弾性部材 70a、70b 当接部 70c 挿入孔 70d 外周 70h (導入孔に面する)表面 F 押圧荷重 P 吸気圧検出手段Reference Signs List 1 intake throttle device 10 valve housing (intake pipe) 10a intake passage 11 outer peripheral wall 12 (12a) housing wall
(Boss part for fixing the substrate 51) 13 Seat part 15 Pressure introducing pipe 15a Introducing hole 15b Step part (step part for loosely fitting the elastic member 70 in the radial direction) 15c Wall part 15h Inner circumference 20 Valve shaft 30 Valve body 50 Control box 51 Substrate 60 Negative pressure sensor (intake pressure detection means P) 60a Sensing pipe 70 Elastic member 70a, 70b Contact portion 70c Insert hole 70d Outer circumference 70h Surface (facing introduction hole) F Pressing load P Intake pressure detection means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 黒田 京彦 愛知県刈谷市昭和町1丁目1番地 株式会 社デンソー内 (72)発明者 八木 寛一 愛知県刈谷市昭和町1丁目1番地 株式会 社デンソー内 Fターム(参考) 3G065 CA39 DA04 HA21 HA22 3G301 JA20 PA07Z ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshihiko Kuroda 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Kenichi Yagi 1-1-1, Showa-cho, Kariya-shi, Aichi Co., Ltd. F term in DENSO (reference) 3G065 CA39 DA04 HA21 HA22 3G301 JA20 PA07Z
Claims (5)
面積を可変にする弁体と、 該弁体の下流側の吸気圧を検出する吸気圧検出手段と、
該吸気圧検出手段と電気的に接続する基板とを有するコ
ントロールボックスとを備えた内燃機関の吸気装置にお
いて、 前記吸気圧検出手段は、前記基板の下面に配設され、先
端にセンシングパイプを有する負圧センサからなり、か
つ前記吸気管には、前記吸気通路に開口する圧力導入管
が前記負圧センサと対向する位置に設けられており、 前記センシングパイプ側の前記負圧センサの下面と前記
圧力導入管との間に弾性部材が挟み込まれるようにし
て、前記負圧センサが前記圧力導入管に押圧固定されて
いることを特徴とする内燃機関の吸気装置。An intake pipe forming an intake passage, a valve body rotatably supported in the intake pipe and varying an opening area of the intake passage, and detecting an intake pressure downstream of the valve body. Intake pressure detecting means,
A control box having a board electrically connected to the intake pressure detection means, wherein the intake pressure detection means is disposed on a lower surface of the board and has a sensing pipe at a tip thereof. A pressure introduction pipe which is formed of a negative pressure sensor, and which is open to the intake passage, is provided in the intake pipe at a position facing the negative pressure sensor; An intake device for an internal combustion engine, wherein the negative pressure sensor is pressed and fixed to the pressure introducing tube such that an elastic member is sandwiched between the pressure introducing tube and the pressure introducing tube.
記圧力導入管に当接する端面部に、前記圧力導入管の軸
方向荷重が加えられていることを特徴とする請求項1に
記載の内燃機関の吸気装置。2. The pressure member according to claim 1, wherein the elastic member is formed in a flat plate shape, and an axial load of the pressure introducing tube is applied to an end surface portion abutting on the pressure introducing tube. Of the internal combustion engine.
管の外壁と一体的に形成されるものであって、 前記基板が前記外壁に固定されるとき、前記基板は、前
記負圧センサを介して、前記弾性部材を前記圧力導入管
に押圧することを特徴とする請求項1または請求項2に
記載の内燃機関の吸気装置。3. The control box is formed integrally with an outer wall of the intake pipe, and when the substrate is fixed to the outer wall, the substrate is connected via the negative pressure sensor. The intake device for an internal combustion engine according to claim 1 or 2, wherein the elastic member is pressed against the pressure introducing pipe.
を貫通して突出していることを特徴とする請求項1から
請求項3のいずれか一項に記載の内燃機関の吸気装置。4. The intake device for an internal combustion engine according to claim 1, wherein the sensing pipe projects through the elastic member.
グパイプを挿入する挿入孔を有することを特徴とする請
求項1から請求項4のいずれか一項に記載の内燃機関の
吸気装置。5. The intake device for an internal combustion engine according to claim 1, wherein the elastic member has an insertion hole for inserting the sensing pipe at a central portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2001094178A JP2002295282A (en) | 2001-03-28 | 2001-03-28 | Air intake device for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001094178A JP2002295282A (en) | 2001-03-28 | 2001-03-28 | Air intake device for internal combustion engine |
Publications (1)
Publication Number | Publication Date |
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JP2002295282A true JP2002295282A (en) | 2002-10-09 |
Family
ID=18948417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2001094178A Pending JP2002295282A (en) | 2001-03-28 | 2001-03-28 | Air intake device for internal combustion engine |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004083616A1 (en) * | 2003-03-20 | 2004-09-30 | Keihin Corporation | Electric parts attaching structure and attaching method for throttle body, and throttle body |
WO2004083617A1 (en) * | 2003-03-20 | 2004-09-30 | Keihin Corporation | Structure of providing electronic control device for motor vehicle and structure of attaching heat-generating component of throttle body |
CN100368668C (en) * | 2003-03-20 | 2008-02-13 | 株式会社京滨 | Throttle body |
CN100400828C (en) * | 2003-03-20 | 2008-07-09 | 株式会社京滨 | Electric parts attaching structure and attaching method for throttle body, and throttle body |
JP2012007483A (en) * | 2010-06-22 | 2012-01-12 | Honda Motor Co Ltd | Ecu-integrated throttle device |
CN108979911A (en) * | 2017-06-01 | 2018-12-11 | 马涅蒂-马瑞利公司 | For internal combustion engine and equipped with the throttle valve of pressure sensor and temperature sensor |
-
2001
- 2001-03-28 JP JP2001094178A patent/JP2002295282A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004083616A1 (en) * | 2003-03-20 | 2004-09-30 | Keihin Corporation | Electric parts attaching structure and attaching method for throttle body, and throttle body |
WO2004083617A1 (en) * | 2003-03-20 | 2004-09-30 | Keihin Corporation | Structure of providing electronic control device for motor vehicle and structure of attaching heat-generating component of throttle body |
CN100368668C (en) * | 2003-03-20 | 2008-02-13 | 株式会社京滨 | Throttle body |
US7363908B2 (en) | 2003-03-20 | 2008-04-29 | Keihin Corporation | Electric parts attaching structure and attaching method for throttle body, and throttle body |
CN100400828C (en) * | 2003-03-20 | 2008-07-09 | 株式会社京滨 | Electric parts attaching structure and attaching method for throttle body, and throttle body |
JP2012007483A (en) * | 2010-06-22 | 2012-01-12 | Honda Motor Co Ltd | Ecu-integrated throttle device |
CN108979911A (en) * | 2017-06-01 | 2018-12-11 | 马涅蒂-马瑞利公司 | For internal combustion engine and equipped with the throttle valve of pressure sensor and temperature sensor |
CN108979911B (en) * | 2017-06-01 | 2021-08-06 | 马涅蒂-马瑞利公司 | Throttle valve for an internal combustion engine and provided with a pressure sensor and a temperature sensor |
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