JP3144943B2 - Air flow measurement device - Google Patents

Air flow measurement device

Info

Publication number
JP3144943B2
JP3144943B2 JP05837293A JP5837293A JP3144943B2 JP 3144943 B2 JP3144943 B2 JP 3144943B2 JP 05837293 A JP05837293 A JP 05837293A JP 5837293 A JP5837293 A JP 5837293A JP 3144943 B2 JP3144943 B2 JP 3144943B2
Authority
JP
Japan
Prior art keywords
temperature
resistor
thermistor
intake air
air flow
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.)
Expired - Lifetime
Application number
JP05837293A
Other languages
Japanese (ja)
Other versions
JPH06273207A (en
Inventor
一彦 宮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi Automotive Systems Engineering Co Ltd
Original Assignee
Hitachi Ltd
Hitachi Car Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Car Engineering Co Ltd filed Critical Hitachi Ltd
Priority to JP05837293A priority Critical patent/JP3144943B2/en
Publication of JPH06273207A publication Critical patent/JPH06273207A/en
Application granted granted Critical
Publication of JP3144943B2 publication Critical patent/JP3144943B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measuring Volume Flow (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、自動車用内燃機関等の
吸入空気流量測定に使用する空気流量測定装置に吸入空
気温度を独立して検出する機能を持たせた空気流量測定
装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow measuring device used for measuring the intake air flow of an internal combustion engine for an automobile or the like, which has a function of independently detecting the temperature of the intake air.

【0002】[0002]

【従来の技術】従来の空気流量測定装置は特開昭60−36
916 号公報にみられるように吸入空気温度検出用発熱抵
抗体と吸入空気温度補償用感温抵抗体を一体の支持媒体
に設け、吸気系主通路に分岐してなるバイパス空気通路
内に配置したものがあるが、吸入空気量検出のための吸
入空気温度補償用のみで機能し、吸入空気温度を検出し
出力する機能がなかった。また、特開昭62−237320号公
報にみられるように吸入空気温度を補償する感温抵抗体
を別体で支持し、吸気系の主通路に配置したものが報告
されているが、これも吸入空気温度を検出し出力する機
能がなかった。
2. Description of the Related Art A conventional air flow measuring device is disclosed in
As shown in JP-A-916, the heating resistor for detecting the intake air temperature and the temperature-sensitive resistor for compensating the intake air temperature are provided in an integral support medium, and are disposed in a bypass air passage branched into the main passage of the intake system. Although there is a function, it only functions for intake air temperature compensation for detecting the intake air amount, and has no function of detecting and outputting the intake air temperature. Further, as disclosed in Japanese Patent Application Laid-Open No. 62-237320, a temperature-sensitive resistor that compensates for the intake air temperature is separately supported and is disposed in a main passage of an intake system. There was no function to detect and output the intake air temperature.

【0003】一方、内燃機関等のエンジンの制御には吸
入空気温度の要素は不可欠で、現状は吸入空気流量測定
装置上流側に配置されるエアクリーナ等に吸入空気温度
を検出する感温素子を独立で設け、その出力信号により
エンジン制御を行っていた。
On the other hand, an element of the intake air temperature is indispensable for controlling an engine such as an internal combustion engine. At present, a temperature sensitive element for detecting the intake air temperature is provided independently by an air cleaner disposed upstream of the intake air flow measuring device. And the engine is controlled by the output signal.

【0004】[0004]

【発明が解決しようとする課題】このため、吸入空気流
量測定装置に吸入空気温度を検出可能な感温抵抗体を設
けているにもかかわらず、回路構成上の制約から吸入空
気温度の出力が出来ず、吸入空気温度を検出するための
感温素子をエアクリーナ等に別配置しているため、部品
数が多くなりまた価格も高くなるという問題があった。
一方、吸入空気流量検出用発熱抵抗体と別配置に吸入空
気温度補償用感温抵抗体を設けているものもあるが、こ
れに吸入空気温度検出用感温素子を設けた場合、前述し
た吸入空気温度補償用感温抵抗体どちらか一方と同一支
持媒体上に構成しても、各検出素子が2系統になり、構
造が複雑になりまた組立作業性も悪化する要因を持って
いる。本発明の目的は上記した問題を解決するために吸
入空気温度検出用感温素子を空気流量測定装置に一体化
し、部品数の低減,低価格化,組立作業性の容易性を図
ることにある。
For this reason, despite the provision of a temperature-sensitive resistor capable of detecting the intake air temperature in the intake air flow rate measuring device, the output of the intake air temperature is limited due to restrictions on the circuit configuration. However, since the temperature sensing element for detecting the intake air temperature is separately arranged in the air cleaner or the like, there is a problem that the number of parts increases and the price increases.
On the other hand, there is a type in which a temperature sensing resistor for compensating intake air temperature is provided separately from a heating resistor for detecting intake air flow rate. Even if one of the air temperature compensating temperature sensitive resistors is formed on the same supporting medium, each detecting element has two systems, and the structure becomes complicated and the assembling workability is deteriorated. SUMMARY OF THE INVENTION An object of the present invention is to integrate a temperature sensing element for detecting an intake air temperature into an air flow measuring device in order to solve the above-mentioned problem, thereby reducing the number of parts, reducing the cost, and facilitating assembly work. .

【0005】[0005]

【課題を解決するための手段】上記目的は、吸入空気流
量検出用発熱抵抗体と、吸入空気温度補償用感温抵抗体
と、前記発熱抵抗体と前記感温抵抗体とが接続された制
御回路部と、前記制御回路部からの流量信号を外部に出
力するコネクタ部とを有する空気流量測定装置であっ
て、前記感温抵抗体とは別に吸入空気温度を検出するサ
ーミスタと、前記発熱抵抗体のリードと前記感温抵抗体
のリードと前記サーミスタのリードとを一体にモールド
した支持体とを備え、前記支持体を介して、前記発熱抵
抗体と前記感温抵抗体と前記サーミスタとが前記制御回
路部に接続され、前記サーミスタからの信号を前記制御
回路部及び前記コネクタ部を介して、外部に出力するよ
うにしたことにより達成される。 また、上記目的は、吸
入空気流量検出用発熱抵抗体と、吸入空気温度補償用感
温抵抗体と、前記発熱抵抗体と前記感温抵抗体とが接続
された制御回路部と、前記制御回路部からの流量信号を
外部に出力するコネクタ部とを有する空気流量測定装置
であって、前記感温抵抗体とは別に吸入空気温度を検出
するサーミスタと、前記発熱抵抗体のリードと前記感温
抵抗体のリードと前記サーミスタのリードとを一体にモ
ールドした支持体とを備え、前記支持体を介して、前記
発熱抵抗体と前記感温抵抗体と前記サーミスタとが前記
制御回路部に接続され、前記制御回路部内に前記サーミ
スタからの信号を処理する処理回路が設けられ、前記処
理回路の出力を前記コネクタ部を介して外部に出力する
ようにしたことにより達成される。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a suction air flow.
Heating resistor for quantity detection and temperature sensing resistor for intake air temperature compensation
And a control unit in which the heating resistor and the temperature-sensitive resistor are connected.
Outputs the flow signal from the control circuit and the control circuit to the outside.
Air flow measuring device having a connector
And a sensor for detecting the intake air temperature separately from the temperature-sensitive resistor.
-Mister, lead of the heating resistor and the temperature-sensitive resistor
And the lead of the thermistor are integrally molded
And a heat generating resistor through the support.
The antibody, the temperature-sensitive resistor, and the thermistor control the control circuit.
Connected to the road and controlling the signal from the thermistor
Output to the outside via the circuit section and the connector section
It is achieved by doing so. The above purpose is
Heating resistor for detecting the incoming air flow rate and feeling for compensating the intake air temperature
A temperature resistor, the heating resistor and the temperature-sensitive resistor are connected
Control circuit unit, and a flow rate signal from the control circuit unit.
Air flow measuring device having connector part for outputting to outside
Detecting the intake air temperature separately from the temperature-sensitive resistor.
Thermistor, the lead of the heating resistor and the temperature sensing
The lead of the resistor and the lead of the thermistor are integrated
And a cooled support, and the support
The heating resistor, the temperature-sensitive resistor, and the thermistor are
The thermistor is connected to a control circuit, and the thermistor is provided in the control circuit.
A processing circuit for processing a signal from the
Output the output of the logic circuit to the outside via the connector section
This is achieved by doing so.

【0006】[0006]

【作用】本発明によれば、空気流量測定装置内に設けた
吸入空気温度検出用素子の働きで吸入空気温度検出の信
号が出力出来る。
According to the present invention, a signal for detecting the intake air temperature can be output by the function of the intake air temperature detecting element provided in the air flow measuring device.

【0007】また、前述した吸入空気温度検出用感温素
子を空気流量測定装置に設けた吸入空気温度補償用抵抗
体支持部のざぐり部に配置することにより、吸入空気流
量検出用発熱抵抗体の自己加熱による熱影響を受けず、
安定して精度良く吸入空気温度が検出し得る。
Further, by disposing the above-mentioned temperature sensing element for detecting the intake air temperature in the counterbore of the resistor supporting portion for the intake air temperature compensating provided in the air flow measuring device, the heating resistor for detecting the intake air flow rate can be provided. Unaffected by heat from self-heating,
The intake air temperature can be detected stably and accurately.

【0008】[0008]

【実施例】本発明の実施例を図面に基づき説明する。図
1は本発明の一実施例を示す縦断面図である。この図1
は、バイパス式と呼称されるものでボディ1に主空気通
路2とバイパス空気通路3が配置され、バイパス空気通
路3に発熱抵抗体4と感温抵抗体5が同一支持媒体6に
支持されている。この支持媒体6に吸入空気温度を検出
する感温素子7が支持されており、この支持媒体6を介
して制御回路11に接続されている。図2は、図1にお
いてP方向から見た詳細図で図3はその側面図を表す。
発熱抵抗体4と感温抵抗体5の中間部にある感温抵抗体
支持部12のざぐり部13に感温素子7が支持され、本
例は感温素子7としてセラミック基板8上に設けた厚膜
または薄膜抵抗体9により構成している。この厚膜また
は薄膜抵抗体9は金属製リード10により両側を支持さ
れ、このリード10は支持媒体6に一体モールドされ、
このモールド内を介して制御回路11に接続している。
これにより感温素子7として接続部の少ない接続信頼性
にすぐれたものを供給出来る効果がある。また、抵抗体
としてのリードが存在しないため、コンパクトに出来る
効果がある。図4,図5は図2,図3の他の実施例で、
感温素子7としてチップサーミスタ14を使用したもの
で、感温素子6として実績のあるサーミスタを使用する
ことにより高信頼性が得られる効果がある。
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. This figure 1
The main air passage 2 and the bypass air passage 3 are arranged in the body 1, and the heating resistor 4 and the temperature-sensitive resistor 5 are supported by the same support medium 6 in the bypass air passage 3. I have. A temperature sensing element 7 for detecting the temperature of the intake air is supported by the support medium 6, and is connected to the control circuit 11 via the support medium 6. FIG. 2 is a detailed view seen from the direction P in FIG. 1, and FIG. 3 is a side view thereof.
The temperature-sensitive element 7 is supported by a counterbore 13 of a temperature-sensitive resistor support portion 12 at an intermediate portion between the heat-generating resistor 4 and the temperature-sensitive resistor 5. In this example, the temperature-sensitive element 7 is provided on a ceramic substrate 8. It is composed of a thick or thin film resistor 9. The thick film or thin film resistor 9 is supported on both sides by metal leads 10, and the leads 10 are integrally molded with the support medium 6,
It is connected to the control circuit 11 via this mold.
As a result, there is an effect that a temperature-sensitive element 7 having a small number of connection portions and excellent connection reliability can be supplied. Further, since there is no lead as a resistor, there is an effect that the device can be made compact. 4 and 5 show another embodiment of FIGS. 2 and 3,
Since the chip thermistor 14 is used as the temperature sensing element 7 and a proven thermistor is used as the temperature sensing element 6, there is an effect that high reliability can be obtained.

【0009】図6,図7及び図8,図9は図2,図3に
対応するその他の実施例で、図6,図7は感温素子7と
してリード付サーミスタ15を使用したもので、このリ
ード付サーミスタ15のリード部を支持媒体6のモール
ドに一体成形したもにである。これはサーミスタ自身に
リードが付いているため、新たにリードを設ける必要は
なく、安価で出来る効果がある。図8,図9は感温素子
7としてリード付ボビンタイプ抵抗体16を用いたもの
で、この場合は、発熱抵抗体4と感温抵抗体5と同一抵
抗体を用い、支持媒体6に設けた支持媒体17に溶接し
た構成で吸入空気温度を検出するので、直接抵抗体を流
れ方向に対して直角に用いる必要がなく、流れ方向に対
して平行に配置する。これにより、空気流量検出用発熱
抵抗体4と空気温度補償用感温抵抗体5と同一素子を用
いることにより生産性が向上する効果がある。図10は
図9に対して感温素子7として薄膜ボビン式抵抗体18
を用いた構造のもので感温素子としての抵抗値を大きく
出来、分解能向上による高精度化が得られる効果があ
る。図11は、本発明の他の実施例を示すもので、軸流
バイパス式と呼称されるもので図1と同一符号あるいは
共通する要素を示すものである。本実施例はL型の簡略
化した通路構造を有するもので、図1実施例と同様の効
果を期待出来る。図12は本発明の他の実施例を示すも
のでメイン式と呼称されるものである。ボディ1に設け
た主空気通路2内に副通路19を設け、この中に発熱抵
抗体4,感熱抵抗体5,感熱素子7を同一支持媒体6に
固定したもので、図1実施例と同様の効果が期待出来
る。
FIGS. 6, 7, 8 and 9 show another embodiment corresponding to FIGS. 2 and 3. FIGS. 6 and 7 show a case where a thermistor 15 with a lead is used as the temperature sensing element 7. This is because the lead portion of the thermistor 15 with a lead is integrally formed with the mold of the supporting medium 6. Since the thermistor itself has a lead, there is no need to newly provide a lead, and this has the effect of being inexpensive. 8 and 9 show a case where a bobbin type resistor 16 with a lead is used as the temperature sensing element 7. In this case, the same resistor as the heating resistor 4 and the temperature sensing resistor 5 is used and provided on the support medium 6. Since the intake air temperature is detected by a configuration welded to the supporting medium 17, it is not necessary to use a resistor directly at right angles to the flow direction, and the resistors are arranged in parallel to the flow direction. This has the effect of improving productivity by using the same elements as the heating resistor 4 for detecting the air flow rate and the temperature-sensitive resistor 5 for compensating for the air temperature. FIG. 10 shows a thin-film bobbin type resistor 18 as the temperature-sensitive element 7 in FIG.
With the structure using, the resistance value as a temperature sensing element can be increased, and there is an effect that high precision can be obtained by improving resolution. FIG. 11 shows another embodiment of the present invention, which is called an axial flow bypass type and shows the same reference numerals or the same elements as those in FIG. This embodiment has an L-shaped simplified passage structure, and the same effects as those of the embodiment of FIG. 1 can be expected. FIG. 12 shows another embodiment of the present invention, which is called a main type. A sub-passage 19 is provided in a main air passage 2 provided in a body 1, and a heating resistor 4, a heat-sensitive resistor 5, and a heat-sensitive element 7 are fixed to the same supporting medium 6 therein. The effect of can be expected.

【0010】図13,図14に本発明の実施例のブロッ
ク図を示す。感温素子7の信号処理を図13の場合は、
抵抗値そのものの出力を取り出し、空気流量測定装置の
制御回路を簡略化出来る。また、図14の場合は、制御
回路内で抵抗値を電気信号として変換して出力するた
め、付加価値が増える効果がある。
FIGS. 13 and 14 are block diagrams showing an embodiment of the present invention. In the case of the signal processing of the temperature sensing element 7 shown in FIG.
By taking out the output of the resistance value itself, the control circuit of the air flow measuring device can be simplified. Further, in the case of FIG. 14, since the resistance value is converted and output as an electric signal in the control circuit, the added value is increased.

【0011】[0011]

【発明の効果】本発明によれば、簡単な構成で、精度の
良い空気温度についての情報を外部に提供することが出
来る。
According to the present invention, with a simple structure, accuracy can be improved.
Can provide information about good air temperatures to the outside world.
come.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

【図2】図1の詳細を示す平面図である。FIG. 2 is a plan view showing details of FIG. 1;

【図3】図2の側面図である。FIG. 3 is a side view of FIG. 2;

【図4】図2の他の実施例を示す平面図である。FIG. 4 is a plan view showing another embodiment of FIG. 2;

【図5】図3の他の実施例を示す側面図である。FIG. 5 is a side view showing another embodiment of FIG. 3;

【図6】図2の他の実施例を示す平面図である。FIG. 6 is a plan view showing another embodiment of FIG. 2;

【図7】図3の他の実施例を示す側面図である。FIG. 7 is a side view showing another embodiment of FIG. 3;

【図8】図2の他の実施例を示す平面図である。FIG. 8 is a plan view showing another embodiment of FIG. 2;

【図9】図3の他の実施例を示す側面図である。FIG. 9 is a side view showing another embodiment of FIG. 3;

【図10】図9の他の実施例を示す側面図である。FIG. 10 is a side view showing another embodiment of FIG. 9;

【図11】本発明の他の実施例を示す縦断面図である。FIG. 11 is a longitudinal sectional view showing another embodiment of the present invention.

【図12】本発明の他の実施例を示す縦断面図である。FIG. 12 is a longitudinal sectional view showing another embodiment of the present invention.

【図13】本発明の実施例のブロック図である。FIG. 13 is a block diagram of an embodiment of the present invention.

【図14】本発明の実施例のブロック図である。FIG. 14 is a block diagram of an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1…ボディ、2…主空気通路、3…バイパス空気通路、
4…発熱抵抗体、5…感温抵抗体、6…支持媒体、7…
感温素子、8…セラミック基板、9…厚膜または薄膜抵
抗体、10…金属製リード、11…制御回路、12…感
温抵抗体支持部、13…ざぐり部、14…チップサーミ
スタ、15…リード付チップサーミスタ、16…リード
付ボビンタイプ抵抗体、17…支持体、18…薄膜ボビ
ン式抵抗体、19…副通路。
1 ... body, 2 ... main air passage, 3 ... bypass air passage,
4 ... heating resistor, 5 ... temperature-sensitive resistor, 6 ... support medium, 7 ...
Temperature sensing element, 8: ceramic substrate, 9: thick or thin film resistor, 10: metal lead, 11: control circuit, 12: thermosensitive resistor support, 13: counterbore, 14: chip thermistor, 15 ... Chip thermistor with lead, 16: bobbin type resistor with lead, 17: support, 18: thin film bobbin type resistor, 19: sub-passage.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平1−100423(JP,A) 特開 平4−278423(JP,A) 特開 昭61−239119(JP,A) (58)調査した分野(Int.Cl.7,DB名) G01F 1/68 - 1/699 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-100423 (JP, A) JP-A-4-278423 (JP, A) JP-A-61-239119 (JP, A) (58) Field (Int.Cl. 7 , DB name) G01F 1/68-1/699

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】吸入空気流量検出用発熱抵抗体と、 吸入空気温度補償用感温抵抗体と、 前記発熱抵抗体と前記感温抵抗体とが接続された制御回
路部と、 前記制御回路部からの流量信号を外部に出力するコネク
タ部とを有する空気流量測定装置であって、 前記感温抵抗体とは別に吸入空気温度を検出するサーミ
スタと、 前記発熱抵抗体のリードと前記感温抵抗体のリードと前
記サーミスタのリードとを一体にモールドした支持体と
を備え、 前記支持体を介して、前記発熱抵抗体と前記感温抵抗体
と前記サーミスタとが前記制御回路部に接続され、 前記サーミスタからの信号を前記制御回路部及び前記コ
ネクタ部を介して、外部に出力するようにしたことを特
徴とする空気流量測定装置。
1. A heating resistor for detecting an intake air flow rate, a temperature sensing resistor for compensating intake air temperature, a control circuit unit connected to the heating resistor and the temperature sensing resistor, and the control circuit unit An air flow measuring device having a connector part for outputting a flow signal from the outside to the outside, a thermistor for detecting an intake air temperature separately from the temperature-sensitive resistor, a lead of the heating resistor and the temperature-sensitive resistor A support body in which a body lead and a thermistor lead are integrally molded, and the heating resistor, the temperature-sensitive resistor, and the thermistor are connected to the control circuit unit via the support, An air flow measuring device, wherein a signal from the thermistor is output to the outside via the control circuit section and the connector section.
【請求項2】吸入空気流量検出用発熱抵抗体と、 吸入空気温度補償用感温抵抗体と、 前記発熱抵抗体と前記感温抵抗体とが接続された制御回
路部と、 前記制御回路部からの流量信号を外部に出力するコネク
タ部とを有する空気流量測定装置であって、 前記感温抵抗体とは別に吸入空気温度を検出するサーミ
スタと、 前記発熱抵抗体のリードと前記感温抵抗体のリードと前
記サーミスタのリードとを一体にモールドした支持体と
を備え、 前記支持体を介して、前記発熱抵抗体と前記感温抵抗体
と前記サーミスタとが前記制御回路部に接続され、 前記制御回路部内に前記サーミスタからの信号を処理す
る処理回路が設けられ、前記処理回路の出力を前記コネ
クタ部を介して外部に出力するようにしたことを特徴と
する空気流量測定装置。
2. A heating resistor for detecting an intake air flow rate, a temperature sensing resistor for intake air temperature compensation, a control circuit unit connected to the heating resistor and the temperature sensing resistor, and the control circuit unit. An air flow measuring device having a connector part for outputting a flow signal from the outside to the outside, a thermistor for detecting an intake air temperature separately from the temperature-sensitive resistor, a lead of the heating resistor and the temperature-sensitive resistor A support body in which a body lead and a thermistor lead are integrally molded, and the heating resistor, the temperature-sensitive resistor, and the thermistor are connected to the control circuit unit via the support, An air flow measuring device, wherein a processing circuit for processing a signal from the thermistor is provided in the control circuit section, and an output of the processing circuit is output to the outside via the connector section.
【請求項3】請求項1または2において、 前記支持部にざぐり部に設け、 前記ざぐり部に前記サーミスタを配したことを特徴とす
る空気流量測定装置。
3. The air flow measuring device according to claim 1, wherein the counterbore is provided in the support, and the thermistor is disposed in the counterbore.
JP05837293A 1993-03-18 1993-03-18 Air flow measurement device Expired - Lifetime JP3144943B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05837293A JP3144943B2 (en) 1993-03-18 1993-03-18 Air flow measurement device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05837293A JP3144943B2 (en) 1993-03-18 1993-03-18 Air flow measurement device

Publications (2)

Publication Number Publication Date
JPH06273207A JPH06273207A (en) 1994-09-30
JP3144943B2 true JP3144943B2 (en) 2001-03-12

Family

ID=13082501

Family Applications (1)

Application Number Title Priority Date Filing Date
JP05837293A Expired - Lifetime JP3144943B2 (en) 1993-03-18 1993-03-18 Air flow measurement device

Country Status (1)

Country Link
JP (1) JP3144943B2 (en)

Also Published As

Publication number Publication date
JPH06273207A (en) 1994-09-30

Similar Documents

Publication Publication Date Title
US7269999B2 (en) Thermal airflow meter
JP3366818B2 (en) Thermal air flow meter
EP0175077B1 (en) Air flow sensor
EP1418408B1 (en) Thermal flow sensor
EP1698864A1 (en) Thermal flowmeter of fluid
US6134960A (en) Thermal-type flow sensor
US6862930B1 (en) Fluid flow amount measuring apparatus responsive to fluid flow in forward and reverse directions
JP3609148B2 (en) Heat resistance air flow meter
US7051589B2 (en) Heating resistor flow rate measuring instrument
JP3144943B2 (en) Air flow measurement device
KR100347642B1 (en) Pressure transducer for detecting pressure in the combustion chamber of an internal combustion engine
JP3095322B2 (en) Thermal air flow detector
JP3022203B2 (en) Thermal air flow detector
JP3184401B2 (en) Thermal air flow detector
JP3174234B2 (en) Thermal air flow detector
JP3378833B2 (en) Heating resistor type air flow measurement device
JP2944890B2 (en) Thermal air flow detector
JPH08285651A (en) Air flow rate measuring device
JP3064086B2 (en) Air flow meter and engine control system using the same
JP3133609B2 (en) Thermal air flow detector
JPH0814976A (en) Air flow rate measuring instrument
JPH08105779A (en) Thermal-type air flow-rate detector
JPH0143883B2 (en)
JP2690066B2 (en) Thermal flow sensor
JP2020008595A (en) Air flow mater

Legal Events

Date Code Title Description
FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080105

Year of fee payment: 7

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080105

Year of fee payment: 7

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090105

Year of fee payment: 8

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100105

Year of fee payment: 9

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110105

Year of fee payment: 10

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110105

Year of fee payment: 10

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313115

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110105

Year of fee payment: 10

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120105

Year of fee payment: 11

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130105

Year of fee payment: 12