FR2259355A1 - Air supply measuring device for I.C. engine - computes air speed from phase difference of ultrasonic wave at two detectors - Google Patents
Air supply measuring device for I.C. engine - computes air speed from phase difference of ultrasonic wave at two detectorsInfo
- Publication number
- FR2259355A1 FR2259355A1 FR7502621A FR7502621A FR2259355A1 FR 2259355 A1 FR2259355 A1 FR 2259355A1 FR 7502621 A FR7502621 A FR 7502621A FR 7502621 A FR7502621 A FR 7502621A FR 2259355 A1 FR2259355 A1 FR 2259355A1
- Authority
- FR
- France
- Prior art keywords
- air
- engine
- phase difference
- signals
- detectors
- 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
Classifications
-
- 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
-
- 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
- G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT6723874A IT1004813B (it) | 1974-01-29 | 1974-01-29 | Dispositivo per la misura della por tata d aria in massa in condotti di alimentazione per motori a combu stione interna |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2259355A1 true FR2259355A1 (en) | 1975-08-22 |
FR2259355B1 FR2259355B1 (fr) | 1978-08-18 |
Family
ID=11300737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7502621A Granted FR2259355A1 (en) | 1974-01-29 | 1975-01-28 | Air supply measuring device for I.C. engine - computes air speed from phase difference of ultrasonic wave at two detectors |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2259355A1 (fr) |
IT (1) | IT1004813B (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0007782A1 (fr) * | 1978-07-22 | 1980-02-06 | Robert James Redding | Dispositif de mesure de l'écoulement d'un fluide |
US4488428A (en) * | 1981-07-07 | 1984-12-18 | Handa Giken Kogyo Kabushiki Kaisha | Ultrasonic air flowmeter for motor vehicles |
EP0262441A1 (fr) * | 1986-09-30 | 1988-04-06 | Siemens Aktiengesellschaft | Procédé de différence de phase ultrasonique pour mesurer de hautes vitesses d'écoulement |
-
1974
- 1974-01-29 IT IT6723874A patent/IT1004813B/it active
-
1975
- 1975-01-28 FR FR7502621A patent/FR2259355A1/fr active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0007782A1 (fr) * | 1978-07-22 | 1980-02-06 | Robert James Redding | Dispositif de mesure de l'écoulement d'un fluide |
US4488428A (en) * | 1981-07-07 | 1984-12-18 | Handa Giken Kogyo Kabushiki Kaisha | Ultrasonic air flowmeter for motor vehicles |
EP0262441A1 (fr) * | 1986-09-30 | 1988-04-06 | Siemens Aktiengesellschaft | Procédé de différence de phase ultrasonique pour mesurer de hautes vitesses d'écoulement |
Also Published As
Publication number | Publication date |
---|---|
FR2259355B1 (fr) | 1978-08-18 |
IT1004813B (it) | 1976-07-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |