KR950025419A - Thermal Air Flow Detector - Google Patents
Thermal Air Flow Detector Download PDFInfo
- Publication number
- KR950025419A KR950025419A KR1019950004110A KR19950004110A KR950025419A KR 950025419 A KR950025419 A KR 950025419A KR 1019950004110 A KR1019950004110 A KR 1019950004110A KR 19950004110 A KR19950004110 A KR 19950004110A KR 950025419 A KR950025419 A KR 950025419A
- Authority
- KR
- South Korea
- Prior art keywords
- resistor
- flow
- flow direction
- heat generating
- air
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
- G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
- G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
열식 공기 유량 검출장치에 있어서, 흡입 공기의 흐름 방향을 검출하여 흐름 방향의 대응하는 유량을 검출하고, 신뢰성을 향상시킨다.In the thermal air flow rate detection device, the flow direction of the intake air is detected to detect the corresponding flow rate in the flow direction, and the reliability is improved.
절연 기판(29)상에는 공기의 흐름(화살표 A방향)에 대하여 상류측에 발열 저항체(30)을 착막 형성하고, 하류측에 감온 저항체(31)을 착막 형성한다. 이에따라, 화살표 A방향의 흐름일 때에는 감온 저항체(31)은 발열 저항체(30)의 열의 영향에 의하여 완만하게 냉각되기 때문에 저항치의 변화는 완만하게된다. 또한, 화살표 B방향의 흐름일 때에는 감온 저항체(31)은 공기에 의해 직접 냉각되기 때문에 급격히 저항치가 변화한다. 이 변화의 차로부터 흐름의 방향을 검출하고 발열 저항체(30)의 저항치 변화로 유량을 검출한다.On the insulated substrate 29, the heat generating resistor 30 is formed on the upstream side with respect to the air flow (arrow A direction), and the thermosensitive resistor 31 is formed on the downstream side. Accordingly, when the flow is in the direction of arrow A, since the thermosensitive resistor 31 is slowly cooled by the influence of the heat of the heat generating resistor 30, the change in the resistance value is gentle. In the flow in the direction of arrow B, since the thermosensitive resistor 31 is directly cooled by air, the resistance value changes rapidly. The direction of flow is detected from the difference of this change, and a flow volume is detected by the change of the resistance value of the heat generating resistor 30.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 제1실시예에 의한 열식 공기 유량 검출장치를 흡기관에 설치한 상태를 도시한 종단면도,1 is a longitudinal sectional view showing a state in which a thermal air flow rate detection device according to a first embodiment is installed in an intake pipe;
제2도는 절연 기판상에 형성된 발열 저항체 및 감온 저항체를 도시한 평면도,2 is a plan view showing a heat generating resistor and a thermosensitive resistor formed on an insulating substrate,
제3도는 제1실시예에 의한 열식 공기 유량 검출장치의 회로 구성을 도시한 회로도,3 is a circuit diagram showing the circuit configuration of the thermal air flow rate detection device according to the first embodiment;
제4도는 유속에 대한 감온 저항체의 저항치 변화를 도시한 특성도,4 is a characteristic diagram showing a change in the resistance value of the thermosensitive resistor with respect to the flow rate,
제5도는 흡입 공기의 유속과 흐름 방향 검출신호와의 관계를 도시한 특성선도,5 is a characteristic diagram showing the relationship between the flow velocity of intake air and the flow direction detection signal;
제6도는 제2실시예에 의한 절연 기판상에 형성된 발열 저항체, 감온 저항체, 보조 히터 및 온도 보상 저항을 도시한 평면도,6 is a plan view showing a heat generating resistor, a thermosensitive resistor, an auxiliary heater, and a temperature compensation resistor formed on the insulating substrate according to the second embodiment;
제7도는 제2실시예에 의한 열식 공기 유량 검출장치의 회로 구성을 도시한 회로도.FIG. 7 is a circuit diagram showing the circuit configuration of the thermal air flow rate detecting device according to the second embodiment. FIG.
Claims (10)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP94-054623 | 1994-02-28 | ||
JP5462394 | 1994-02-28 | ||
JP94-150428 | 1994-06-08 | ||
JP15042894A JP3184401B2 (en) | 1994-02-28 | 1994-06-08 | Thermal air flow detector |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950025419A true KR950025419A (en) | 1995-09-15 |
KR0163637B1 KR0163637B1 (en) | 1999-05-01 |
Family
ID=26395407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950004110A KR0163637B1 (en) | 1994-02-28 | 1995-02-28 | Thermal type air flow rate detector |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP3184401B2 (en) |
KR (1) | KR0163637B1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3981907B2 (en) | 1998-10-21 | 2007-09-26 | 株式会社デンソー | Flow measuring device |
JP4474771B2 (en) | 2000-12-20 | 2010-06-09 | 株式会社デンソー | Flow measuring device |
DE102004033049B4 (en) * | 2004-07-08 | 2016-05-04 | Robert Bosch Gmbh | Measuring device for a flow sensor, in particular an air mass sensor for internal combustion engines and method for measuring air flows |
-
1994
- 1994-06-08 JP JP15042894A patent/JP3184401B2/en not_active Expired - Fee Related
-
1995
- 1995-02-28 KR KR1019950004110A patent/KR0163637B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0163637B1 (en) | 1999-05-01 |
JPH07286876A (en) | 1995-10-31 |
JP3184401B2 (en) | 2001-07-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4774833A (en) | Device for determining mass flow and direction of flow | |
US4777820A (en) | Apparatus for determining the flow rate of a flowing medium | |
KR0184673B1 (en) | Thermal type flowmeter | |
US6079264A (en) | Thermal flow sensor supporting element having a gradually increased portion between its distal ends | |
KR960014888A (en) | Heating resistance flow measurement device | |
KR950025420A (en) | Hot film type airflow detection device applied to internal combustion engine for vehicles | |
KR960024293A (en) | Thermal flow meter | |
KR960008276A (en) | Intake air volume measuring device of internal combustion engine | |
JP3240733B2 (en) | Thermal air flow meter | |
JPH05196486A (en) | Measuring element | |
JP2962695B2 (en) | Fluid detector | |
US3733897A (en) | Sensor assembly for vortex-type flowmeters | |
KR950025419A (en) | Thermal Air Flow Detector | |
JP3193872B2 (en) | Thermal air flow meter | |
US6279394B1 (en) | Mass air flow meter | |
JPH05126613A (en) | Measuring element | |
KR950001285A (en) | Heating resistance air flow meter and air flow measurement method | |
JP5029509B2 (en) | Flow sensor | |
JP3527657B2 (en) | Flow sensor failure determination apparatus and method | |
JPH09318412A (en) | Thermal flow velocity sensor | |
KR950025418A (en) | Thermal Air Flow Detector | |
JP2533479B2 (en) | Heating resistance type air flow meter | |
JP2002277483A (en) | Heat type flow rate sensor | |
JPH0674805A (en) | Heat sensing flow rate sensor | |
DE59601899D1 (en) | CIRCUIT ARRANGEMENT FOR DETECTING AN OVER TEMPERATURE DUE TO A FLOWING CURRENT |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
G170 | Publication of correction | ||
FPAY | Annual fee payment |
Payment date: 20120821 Year of fee payment: 15 |
|
FPAY | Annual fee payment |
Payment date: 20130819 Year of fee payment: 16 |
|
LAPS | Lapse due to unpaid annual fee |