JPH0821760A - Air flow rate measuring apparatus - Google Patents
Air flow rate measuring apparatusInfo
- Publication number
- JPH0821760A JPH0821760A JP6155663A JP15566394A JPH0821760A JP H0821760 A JPH0821760 A JP H0821760A JP 6155663 A JP6155663 A JP 6155663A JP 15566394 A JP15566394 A JP 15566394A JP H0821760 A JPH0821760 A JP H0821760A
- Authority
- JP
- Japan
- Prior art keywords
- air temperature
- air flow
- air
- flow rate
- measuring device
- 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
Landscapes
- Measuring Volume Flow (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、発熱抵抗式空気流量測
定装置に係り、特に自動車エンジンの吸入空気温度を検
出する機能を有する内燃機関用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 a heating resistance type air flow measuring device, and more particularly to an air flow measuring device for an internal combustion engine having a function of detecting an intake air temperature of an automobile engine.
【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 号公報に見られるように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を副空気通路に配
置したものがあるが、空気温度補償用感温抵抗体は、空
気流量検出時の空気温度補償用としてのみの機能しかな
く、空気温度検出を独立して行う機能は持っていなかっ
た。一方内燃機関等のエンジン制御には空気温度の要素
は不可欠で、現状は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空気温度検出素子を独立して設けて
いる。2. Description of the Related Art A conventional air flow rate measuring device is disclosed in JP-A-60-36.
As can be seen in Japanese Patent No. 916, there is a heating resistor for detecting the intake air flow rate and a temperature sensing resistor for compensating the intake air temperature arranged in the sub air passage. It has only the function of compensating the air temperature at the time of detection, and does not have the function of independently detecting the air temperature. On the other hand, an element of air temperature is indispensable for engine control of an internal combustion engine or the like, and at present, an air temperature detecting element is independently provided in an air cleaner or the like arranged upstream of the air flow rate measuring device.
【０００３】[0003]
【発明が解決しようとする課題】この空気温度検出素子
をエアクリーナ等に設けているため、部品点数が多く、
しかも配線が複雑になり、組立作業性が悪くなる。Since this air temperature detecting element is provided in the air cleaner or the like, the number of parts is large,
Moreover, the wiring becomes complicated and the assembly workability deteriorates.
【０００４】このため、本発明の目的は、空気温度を検
出する機能を、部品点数を押さえ、配線を簡単化した構
造で実現することにある。Therefore, an object of the present invention is to realize the function of detecting the air temperature with a structure in which the number of parts is reduced and wiring is simplified.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、空気温度検出素子を空気流量測定装置の駆動回路モ
ジュールに一体化するとともに、駆動回路モジュールに
設けたコネクタ部に直接接続することにより、部品点数
を低減，配線の簡単化が達成出来る。In order to achieve the above object, an air temperature detecting element is integrated with a drive circuit module of an air flow rate measuring device and directly connected to a connector portion provided in the drive circuit module. The number of parts can be reduced and wiring can be simplified.
【０００６】[0006]
【作用】本発明によれば、空気流量測定装置の駆動回路
モジュールに一体化し、コネクタ部に直接接続すること
により、配線抵抗を低く押さえることが出来、高精度で
吸入空気温度を検出出来る。また、駆動回路モジュール
に一体化することにより組立作業性が向上出来る。According to the present invention, the wiring resistance can be kept low and the intake air temperature can be detected with high accuracy by being integrated with the drive circuit module of the air flow rate measuring device and directly connected to the connector portion. In addition, assembling workability can be improved by integrating with the drive circuit module.
【０００７】[0007]
【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平面図である。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the present invention.
【０００８】吸入空気は主空気通路１、及び副空気通路
２を通りエンジンに供給される。主空気通路１、及び副
空気通路２はボディ３内に併設される。副空気通路２内
には、吸入空気の流量を計測する発熱抵抗体４、及び吸
入空気温度補償用の感温抵抗体５が設置される。この発
熱抵抗体４，感温抵抗体５は支持ピンにより駆動回路と
電気的に接続しており、駆動回路モジュール６を形成し
ている。この駆動回路により発熱抵抗体４に、一定温度
に加熱するために電流が流される。この加熱温度は吸入
空気の量に関係無く、発熱抵抗体４と吸入空気温度の差
が一定に保たれ、吸入空気温度を感温抵抗体で補正して
いる。すなわち、高流量が空気通路を流れたときは、発
熱抵抗体４に大きい電流を、低流量が流れたときは小さ
い電流を流して一定温度を保つものである。発熱抵抗体
４を流れる電流と空気流量間には単調増加関数の関係が
あり、これにより空気流量を検出するものである。The intake air is supplied to the engine through the main air passage 1 and the sub air passage 2. The main air passage 1 and the sub air passage 2 are provided inside the body 3. In the sub air passage 2, a heating resistor 4 for measuring the flow rate of intake air and a temperature sensitive resistor 5 for compensating for the intake air temperature are installed. The heat generating resistor 4 and the temperature sensitive resistor 5 are electrically connected to a drive circuit by a support pin to form a drive circuit module 6. An electric current is applied to the heating resistor 4 by this drive circuit in order to heat it to a constant temperature. This heating temperature maintains a constant difference between the heating resistor 4 and the intake air temperature regardless of the amount of intake air, and the intake air temperature is corrected by the temperature sensitive resistor. That is, when a high flow rate flows through the air passage, a large current is passed through the heating resistor 4, and when a low flow rate flows, a small current is passed to maintain a constant temperature. There is a monotonically increasing function relationship between the current flowing through the heating resistor 4 and the air flow rate, and the air flow rate is detected by this.
【０００９】この空気流量測定装置の駆動回路モジュー
ル６に空気温度検出用素子７が一体で形成されている。
図２は本発明の一実施例を示す図１の駆動回路モジュー
ルを示した正面図面である。空気温度検出用素子７がコ
ネクタ８に直接接続されている。このように空気温度検
出用素子を駆動回路モジュール６に一体化することによ
り、着脱性が容易になり、市場でのメンテナンス性が向
上出来る効果がある。また、コネクタ部に直接接続する
ことにより配線抵抗を低減出来、高精度で空気温度を検
出出来る効果がある。An air temperature detecting element 7 is formed integrally with the drive circuit module 6 of this air flow rate measuring device.
FIG. 2 is a front view showing the drive circuit module of FIG. 1 showing an embodiment of the present invention. The air temperature detecting element 7 is directly connected to the connector 8. By integrating the air temperature detecting element into the drive circuit module 6 in this manner, the detachability is facilitated and the maintainability in the market can be improved. Further, by directly connecting to the connector portion, the wiring resistance can be reduced and the air temperature can be detected with high accuracy.
【００１０】図３は他の発明の実施例を示す正面図であ
る。空気流量測定装置の駆動回路モジュール６とこれに
設けたコネクタ８に直接接続した空気温度検出用素子７
が空気温度検出用素子部のみ脱着可能な構成となってい
る。この構成により、市場等で空気温度検出用素子故障
時、素子のみの交換が可能となり、市場メンテナンス性
の向上に効果がある。FIG. 3 is a front view showing another embodiment of the invention. Air temperature detecting element 7 directly connected to a drive circuit module 6 of an air flow rate measuring device and a connector 8 provided on the drive circuit module 6.
Is configured such that only the air temperature detecting element portion can be attached and detached. With this configuration, when the air temperature detecting element fails in the market or the like, only the element can be replaced, which is effective in improving the market maintainability.
【００１１】図４，図５は本発明の他の実施例を示す正
面図，側面図である。駆動回路モジュール６から独立し
て成るコネクタ８から直接空気温度検出素子が接続され
ている。このため、配線抵抗を低減出来、高精度で吸入
空気温度を検出出来る効果がある。4 and 5 are a front view and a side view showing another embodiment of the present invention. An air temperature detecting element is directly connected to a connector 8 which is independent of the drive circuit module 6. Therefore, the wiring resistance can be reduced, and the intake air temperature can be detected with high accuracy.
【００１２】[0012]
【発明の効果】本発明によれば、吸入空気温度検出精度
の高い空気流量測定装置を提供できる。According to the present invention, it is possible to provide an air flow rate measuring device with high accuracy in detecting the intake air temperature.
【図１】本発明の一実施例を示す平面図である。FIG. 1 is a plan view showing an embodiment of the present invention.
【図２】図１の正面図である。FIG. 2 is a front view of FIG.
【図３】他の実施例を示す正面図である。FIG. 3 is a front view showing another embodiment.
【図４】他の実施例を示す正面図である。FIG. 4 is a front view showing another embodiment.
【図５】図４の側面図である。FIG. 5 is a side view of FIG.
【符号の説明】 １…主空気通路、２…副空気通路、３…ボディ、４…発
熱抵抗体、５…感温抵抗体、６…駆動回路モジュール、
７…空気温度検出用素子、８…コネクタ。[Explanation of Codes] 1 ... Main air passage, 2 ... Sub air passage, 3 ... Body, 4 ... Heating resistor, 5 ... Temperature sensitive resistor, 6 ... Drive circuit module,
7 ... Air temperature detecting element, 8 ... Connector.
Claims (3)
路と発熱抵抗体，感温抵抗体を配置した副空気通路とを
併設する空気流量測定装置において、前記、主空気通路
中に吸入空気温度検出用素子を、前記空気流量測定装置
の駆動回路モジュールのコネクタに直接接続し、かつ前
記駆動回路モジュールと同一に脱着可能な構造としたこ
とを特徴とする空気流量測定装置。1. An air flow measuring device having a main air passage through which air supplied to an internal combustion engine flows and a sub air passage in which a heating resistor and a temperature-sensitive resistor are arranged, which are sucked into the main air passage. An air flow rate measuring device having a structure in which an air temperature detecting element is directly connected to a connector of a drive circuit module of the air flow rate measuring device and is detachable in the same manner as the drive circuit module.
子のみ脱着可能な構造としたことを特徴とする空気流量
測定装置。2. An air flow measuring device according to claim 1, wherein only the intake air temperature detecting element is detachable.
子と前記空気流量測定装置の駆動回路モジュールのコネ
クタを一体化し、吸入空気温度検出用素子とコネクタの
み脱着可能な構造としたことを特徴とする空気流量測定
装置。3. The structure according to claim 1, wherein the intake air temperature detecting element and the connector of the drive circuit module of the air flow rate measuring device are integrated, and only the intake air temperature detecting element and the connector are detachable. Air flow measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6155663A JPH0821760A (en) | 1994-07-07 | 1994-07-07 | Air flow rate measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6155663A JPH0821760A (en) | 1994-07-07 | 1994-07-07 | Air flow rate measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0821760A true JPH0821760A (en) | 1996-01-23 |
Family
ID=15610878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6155663A Pending JPH0821760A (en) | 1994-07-07 | 1994-07-07 | Air flow rate measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0821760A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010145155A (en) * | 2008-12-17 | 2010-07-01 | Denso Corp | Device for measuring air flow rate |
-
1994
- 1994-07-07 JP JP6155663A patent/JPH0821760A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010145155A (en) * | 2008-12-17 | 2010-07-01 | Denso Corp | Device for measuring air flow rate |
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