JPS5566715A - Gas flow measuring device - Google Patents
Gas flow measuring deviceInfo
- Publication number
- JPS5566715A JPS5566715A JP14018678A JP14018678A JPS5566715A JP S5566715 A JPS5566715 A JP S5566715A JP 14018678 A JP14018678 A JP 14018678A JP 14018678 A JP14018678 A JP 14018678A JP S5566715 A JPS5566715 A JP S5566715A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- generating heater
- heat generation
- heater
- time
- 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.)
- Granted
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
PURPOSE: To prevent breakage of an electric heater[s line and deterioration of characteristics at the time when gas flow becomes zero in the condition that a power source is switched on, by limiting output voltage of a voltage control circuit and providing a heat generation liminting circuit which limits heat generation of a heat- generating heater.
CONSTITUTION: If the condition that suction air flow is zero lasted for a long period of time, heat generation of a heat-generating heater 10 increases and surface temperature rises. At this time, resistance value of the heat-generating heater 10 itself increases and potential of a connecting point e between a base resistance 23 of No.2 bridge and the heat-generating heater 10 rises. And when the potential became larger than the prescribed potential of connecting point f between base resistances 24 and 25, an output of a comparator 47 becomes 1 level and a transistor 50 is switched on and a power transistor 43 is turned off. In this manner, a resistance value of a resistance 42 is selected to an appropriate value in advance, a voltage to be impressed on No.2 bridge becomes small, and heat generation of the heat- generating heater 10 decreases. It is possible in this way to prevent breakage of line of the electric heater 10 and deterioration of characteristics.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53140186A JPS6051044B2 (en) | 1978-11-13 | 1978-11-13 | Gas flow measuring device |
| US06/092,024 US4332165A (en) | 1978-11-10 | 1979-11-07 | Gas flow measuring device |
| US06/324,152 US4417471A (en) | 1978-11-10 | 1981-11-23 | Gas flow measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53140186A JPS6051044B2 (en) | 1978-11-13 | 1978-11-13 | Gas flow measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5566715A true JPS5566715A (en) | 1980-05-20 |
| JPS6051044B2 JPS6051044B2 (en) | 1985-11-12 |
Family
ID=15262897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53140186A Expired JPS6051044B2 (en) | 1978-11-10 | 1978-11-13 | Gas flow measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6051044B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56167996U (en) * | 1980-05-17 | 1981-12-11 | ||
| JPS57114146U (en) * | 1981-01-05 | 1982-07-15 | ||
| EP1087213A2 (en) | 1999-09-24 | 2001-03-28 | Hitachi, Ltd. | Hot-wire type air flow meter for internal combustion engine |
-
1978
- 1978-11-13 JP JP53140186A patent/JPS6051044B2/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56167996U (en) * | 1980-05-17 | 1981-12-11 | ||
| JPS57114146U (en) * | 1981-01-05 | 1982-07-15 | ||
| JPS6212836Y2 (en) * | 1981-01-05 | 1987-04-03 | ||
| EP1087213A2 (en) | 1999-09-24 | 2001-03-28 | Hitachi, Ltd. | Hot-wire type air flow meter for internal combustion engine |
| EP1087213A3 (en) * | 1999-09-24 | 2003-09-24 | Hitachi, Ltd. | Hot-wire type air flow meter for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6051044B2 (en) | 1985-11-12 |
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