EP0095516A1 - Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine - Google Patents

Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine Download PDF

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Publication number
EP0095516A1
EP0095516A1 EP82104720A EP82104720A EP0095516A1 EP 0095516 A1 EP0095516 A1 EP 0095516A1 EP 82104720 A EP82104720 A EP 82104720A EP 82104720 A EP82104720 A EP 82104720A EP 0095516 A1 EP0095516 A1 EP 0095516A1
Authority
EP
European Patent Office
Prior art keywords
air
intake air
detector
air flow
casing
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
Application number
EP82104720A
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English (en)
French (fr)
Other versions
EP0095516B1 (de
Inventor
Yoshiaki C/O Mitsubishi Denki K.K. Asayama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to EP19820104720 priority Critical patent/EP0095516B1/de
Priority to DE8282104720T priority patent/DE3273529D1/de
Publication of EP0095516A1 publication Critical patent/EP0095516A1/de
Application granted granted Critical
Publication of EP0095516B1 publication Critical patent/EP0095516B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/0201—Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
    • F02M35/021—Arrangements of air flow meters in or on air cleaner housings

Definitions

  • the present invention relates to a detection arrangement suitable for detecting an intake air flow rate in an automotive engine, comprising: a casing into which intake air is introduced; a detector for detecting the air flow rate; and a partition extending between said detector and said casing for bounding upstream and downstream regions of the intake air.
  • An arrangement according to the invention may be housed in a casing of an air cleaner or the like.
  • the known vortex-shedding flowmeter comprises an ultrasonic transducer or emitter for radiating ultrasonic energy into a flow of intake or suction air, and further ultrasonic transducer or receiver for receiving the ultrasonic energy as modulated by von Karman vortices generated in the air flow.
  • the ultrasonic transducers are mounted on the wall of a pipe through which the suction air to be measured flows.
  • the present invention has been designed to eliminate or at least reduce the delay with which the wall of a pipe passing air therethrough follows a temperature rise of the air, a delay which has caused the temperature differences described above.
  • the present invention thus provides a device for detecting an intake air flow rate in an automotive engine, the device being suitable for use with engines in which the suction air is subjected to a wide range of temperature changes.
  • said partition is positioned downsteam of an air flow sensing means of said detector.
  • FIG. 1 shows a conventional detecting device in which a pipe 2 for detecting an air flow rate is disposed downstream of an air cleaner casing 1.
  • Fig. 2 illustrates another prior detecting arrangement having a detector including a pipe 2 and an air cleaner casing 1 housing the pipe 2.
  • a partition 3 which divides the casing 1 into upstream and downstream regions is disposed upstream of flow sensing elements 4.
  • the pipe 2 shown in Fig. 1 has its outer surface out of contact with the intake air, and hence can not rapidly follow the temperature change of the air. While the pipe 2 illustrated in Fig. 2 is kept in contact with the intake air at the outer surface thereof, the air tends to be stagnant at the outer surface. Furthermore, the heat of the pipe wall located upstream of the pipe 2 is conducted to the air cleaner casing 1. Therefore, the rate at which the temperature of the wall of the pipe 2 follows the temperature change of the intake air is relatively low.
  • Fig. 3 shows a device for detecting the intake air flow rate according to an embodiment of the present invention.
  • the device includes a partition 9 extending between a pipe or conduit 2 forming a detector for measuring the air flow rate and an air cleaner casing 1 which bounds upstream and downstream regions for the air, the partition 9 being positioned downstream of air flow sensing means 4.
  • the sensing means includes a transmitter for transmitting ultrasonic sound waves across the pipe 2 and a receiver for receiving the ultrasonic sound waves modulated in accordance with the air flow rate, e.g. by the formation of von Karman vortices in the flow.
  • a flow rate adjustment port 11 may be added in the partition with no adverse effect.
  • a detector 2 for detecting the intake air flow rate on an engine the detector being mounted in a casing, into which air for the engine is introduced, and a partition 9 extends between the detector and the casing and bounds upstream and downstream regions of the air, the partition 9 being positioned downstream of sensing means 4 forming a detecting portion of the detector.
  • the temperature of the pipe 2 of the detector can thus follow the air temperature at an improved rate.
  • the detector can therefore stably detect the flow rate of the air even when the temperature of the intake air is changed abruptly.
  • the illustrated device according to the invention is highly suitable for use as a device for detecting the intake air flow rate in an automotive engine, but of course the invention is not limited to use in such an application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Volume Flow (AREA)
EP19820104720 1982-05-28 1982-05-28 Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine Expired EP0095516B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19820104720 EP0095516B1 (de) 1982-05-28 1982-05-28 Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine
DE8282104720T DE3273529D1 (en) 1982-05-28 1982-05-28 Detection arrangement suitable for detecting the intake air flow rate in an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19820104720 EP0095516B1 (de) 1982-05-28 1982-05-28 Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0095516A1 true EP0095516A1 (de) 1983-12-07
EP0095516B1 EP0095516B1 (de) 1986-10-01

Family

ID=8189060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820104720 Expired EP0095516B1 (de) 1982-05-28 1982-05-28 Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP0095516B1 (de)
DE (1) DE3273529D1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0221267A2 (de) * 1985-11-02 1987-05-13 VDO Adolf Schindling AG Anordnung mit einem Luftmassenmesser für eine Brennkraftmaschine
EP0222987A2 (de) * 1985-11-02 1987-05-27 VDO Adolf Schindling AG Anordnung mit einem Luftmassenmesser für eine Brennkraftmaschine
EP0531858A1 (de) * 1991-09-11 1993-03-17 Audi Ag Luftfilter für eine Brennkraftmaschine
FR2767357A1 (fr) * 1997-08-16 1999-02-19 Bosch Gmbh Robert Module de filtre a air d'aspiration d'un moteur a combustion interne
EP1591653A1 (de) * 2004-04-30 2005-11-02 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Luftfilterpatrone für ein Lufteinlasssystem einer Brennkraftmaschine
EP2169209A1 (de) * 2008-09-30 2010-03-31 MAN Nutzfahrzeuge Aktiengesellschaft Anordnung einer Luftmassen-Durchflussmesseinrichtung in einem Ansaugsystem einer Brennkraftmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818877A (en) * 1972-08-24 1974-06-25 Ford Motor Co Signal generating process for use in engine control
GB2044352A (en) * 1979-03-01 1980-10-15 Mitsubishi Motors Corp Suction air volume detecting system in an engine
DE3025431A1 (de) * 1979-07-09 1981-01-15 Nissan Motor Einlasseinrichtung fuer eine brennkraftmaschine
FR2479339A1 (fr) * 1980-03-28 1981-10-02 Mitsubishi Electric Corp Systeme d'aspiration dans un moteur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818877A (en) * 1972-08-24 1974-06-25 Ford Motor Co Signal generating process for use in engine control
GB2044352A (en) * 1979-03-01 1980-10-15 Mitsubishi Motors Corp Suction air volume detecting system in an engine
DE3025431A1 (de) * 1979-07-09 1981-01-15 Nissan Motor Einlasseinrichtung fuer eine brennkraftmaschine
FR2479339A1 (fr) * 1980-03-28 1981-10-02 Mitsubishi Electric Corp Systeme d'aspiration dans un moteur

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0221267A2 (de) * 1985-11-02 1987-05-13 VDO Adolf Schindling AG Anordnung mit einem Luftmassenmesser für eine Brennkraftmaschine
EP0222987A2 (de) * 1985-11-02 1987-05-27 VDO Adolf Schindling AG Anordnung mit einem Luftmassenmesser für eine Brennkraftmaschine
EP0222987A3 (en) * 1985-11-02 1988-05-04 Vdo Adolf Schindling Ag Arrangement comprising an air flow meter for an internal-combustion engine
EP0221267A3 (en) * 1985-11-02 1988-05-04 Vdo Adolf Schindling Ag Arrangement comprising an air flow meter for an internal-combustion engine
EP0531858A1 (de) * 1991-09-11 1993-03-17 Audi Ag Luftfilter für eine Brennkraftmaschine
FR2767357A1 (fr) * 1997-08-16 1999-02-19 Bosch Gmbh Robert Module de filtre a air d'aspiration d'un moteur a combustion interne
GB2328514A (en) * 1997-08-16 1999-02-24 Bosch Gmbh Robert Air filter unit including a tube to protect a flow meter
GB2328514B (en) * 1997-08-16 1999-07-21 Bosch Gmbh Robert Filter unit
EP1591653A1 (de) * 2004-04-30 2005-11-02 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Luftfilterpatrone für ein Lufteinlasssystem einer Brennkraftmaschine
EP2169209A1 (de) * 2008-09-30 2010-03-31 MAN Nutzfahrzeuge Aktiengesellschaft Anordnung einer Luftmassen-Durchflussmesseinrichtung in einem Ansaugsystem einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE3273529D1 (en) 1986-11-06
EP0095516B1 (de) 1986-10-01

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