EP0095516B1 - Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine - Google Patents

Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine Download PDF

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Publication number
EP0095516B1
EP0095516B1 EP19820104720 EP82104720A EP0095516B1 EP 0095516 B1 EP0095516 B1 EP 0095516B1 EP 19820104720 EP19820104720 EP 19820104720 EP 82104720 A EP82104720 A EP 82104720A EP 0095516 B1 EP0095516 B1 EP 0095516B1
Authority
EP
European Patent Office
Prior art keywords
air
detecting
air flow
casing
flow rate
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.)
Expired
Application number
EP19820104720
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English (en)
French (fr)
Other versions
EP0095516A1 (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 DE8282104720T priority Critical patent/DE3273529D1/de
Priority to EP19820104720 priority patent/EP0095516B1/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 for detecting intake air flow rate in an internal combustion engine, comprising: a casing into which intake air is introduced; a detector comprising an air conduit housing and a vortex-shedding flowmeter therein with sensing means mounted for ultrasonically detecting von Karman vortices within the conduit housing for detecting the air flow rate; and a partition extending between said air conduit housing and said casing for dividing the casing into upstream and downstream regions.
  • 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 waif 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.
  • a detection arrangement characterised in that said partition is positioned downstream of said air flow sensing means of said detector and the upstream side of said air conduit housing and said sensing means are surrounded by the inflowing intake air.
  • 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.
  • air which is introduced through an air intake port 5 passed through a cleaner element (filter paper) 6, is rectified by a flow rectifier 7, is introduced into the pipe 2 in which the rate of flow is detected by the sensing elements 4 and leaves the detecting device through outlet port 8.
  • 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.

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)

Claims (5)

1. Detektionsanordnung zum Feststellen der zeitlichen Strömungsmenge der Einlaßluft in einer Brennkraftmaschine, mit einem Gehäuse (1), in das die Einlaßluft eingeführt wird, einem Detektor, in dem sich ein Luftleitungsgehäuse (2) und ein Wirbelablösungs-Strömungsmesser mit Fühlmitteln (4) befinden zum Ultraschallerfassen von Karman-Wirbeln innerhalb des Leitungsgehäuses (2) zum Erfassen der Luftströmungsmenge, und einer Abtrennung (9), die zwischen dem Luftleitungsgehäuse (2) und dem Gehäuse (1) verläuft, um das Gehäuse in stromauf- und stromabliegende Bereiche aufzuteilen, dadurch gekennzeichnet, daß die Abtrennung (9) stromab der Luftströmungsfühlmittel (4) des Detektors (2) und stromauf des Luftleitungsgehäuses (2) angeordnet ist, und daß die Fühlmittel (4) von der einströmenden Einlaßluft umgeben sind.
2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse (1) das Gehäuse eines Luftreinigers für eine Brennkraftmaschine umfaßt.
3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Gehäuse (1) so angeordnet ist, daß es einen Einlaßluftstrom aufnimmt, der im wesentlichen senkrecht zum Luftstrom durch den Detektor (2) ausgerichtet ist.
4. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Abtrennung mit einem Ende des Luftleitungsgehäuses (2) verbunden ist.
5. Brennkraftmaschine mit einem Luftfiltergehäuse, welches die Detektionsanordnung entsprechend einem der vorhergehenden Ansprüche umfaßt.
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
DE8282104720T DE3273529D1 (en) 1982-05-28 1982-05-28 Detection arrangement suitable for detecting the intake air flow rate in an internal combustion engine
EP19820104720 EP0095516B1 (de) 1982-05-28 1982-05-28 Anordnung zur Messung der Ansaugluftmenge einer Brennkraftmaschine

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 EP0095516A1 (de) 1983-12-07
EP0095516B1 true 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)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3539015A1 (de) * 1985-11-02 1987-05-07 Vdo Schindling Anordnung mit einem luftmassenmesser fuer eine brennkraftmaschine
DE3539013A1 (de) * 1985-11-02 1987-05-07 Vdo Schindling Anordnung mit einem luftmassenmesser fuer eine brennkraftmaschine
DE4130218A1 (de) * 1991-09-11 1993-03-18 Audi Ag Luftfilter fuer eine brennkraftmaschine
DE19735664A1 (de) * 1997-08-16 1999-02-18 Bosch Gmbh Robert Filtermodul
DE102004021728A1 (de) * 2004-04-30 2005-11-24 Dr.Ing.H.C. F. Porsche Ag Luftfilterpatrone für ein Lufteinlasssystem einer Brennkraftmaschine
DE102008049806A1 (de) * 2008-09-30 2010-04-01 Man Nutzfahrzeuge Ag Anordnung einer Luftmassen-Durchflussmesseinrichtung in einem Ansaugsystem einer Brennkraftmaschine

Family Cites Families (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
JPS606735Y2 (ja) * 1979-03-01 1985-03-05 三菱自動車工業株式会社 機関の吸気装置
JPS609408Y2 (ja) * 1979-07-09 1985-04-03 日産自動車株式会社 内燃機関の吸気装置
FR2479339A1 (fr) * 1980-03-28 1981-10-02 Mitsubishi Electric Corp Systeme d'aspiration dans un moteur

Also Published As

Publication number Publication date
EP0095516A1 (de) 1983-12-07
DE3273529D1 (en) 1986-11-06

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