EP0096842B2 - Zusammensetzung eines Kraftstoffeinspritzventil - Google Patents

Zusammensetzung eines Kraftstoffeinspritzventil Download PDF

Info

Publication number
EP0096842B2
EP0096842B2 EP19830105627 EP83105627A EP0096842B2 EP 0096842 B2 EP0096842 B2 EP 0096842B2 EP 19830105627 EP19830105627 EP 19830105627 EP 83105627 A EP83105627 A EP 83105627A EP 0096842 B2 EP0096842 B2 EP 0096842B2
Authority
EP
European Patent Office
Prior art keywords
air
fuel injector
chamber part
body assembly
injector body
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 - Lifetime
Application number
EP19830105627
Other languages
English (en)
French (fr)
Other versions
EP0096842A1 (de
EP0096842B1 (de
Inventor
Kimiji Karino
Tokuo Kosuge
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26438866&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0096842(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP57097715A external-priority patent/JPS58214663A/ja
Priority claimed from JP57109994A external-priority patent/JPS59618A/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0096842A1 publication Critical patent/EP0096842A1/de
Application granted granted Critical
Publication of EP0096842B1 publication Critical patent/EP0096842B1/de
Publication of EP0096842B2 publication Critical patent/EP0096842B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/48—Arrangement of air sensors

Definitions

  • This invention relates to fuel injector body assemblies of the type comprising an injector and an air flow meter located upstream of the throttle valve.
  • air intake measuring means comprising an air bypass passageway having a hot wire air flow meter arranged therein are provided as an entity separate from the main air conduit in which an injector is mounted.
  • the air conduit consists of an air chamber part, a venturi chamber and a throttle chamber part which are fixedly connected to each other.
  • the air intake measuring means which is a separate entity is connected to the air conduit from outside.
  • US-A-4 264 961 which comprises an air conduit comprising a venturi and a throttle chamber, and an air bypass passageway formed in the body of the venturi chamber.
  • the air bypass passageway having an L-shaped cross-sectional form begins in the wide portions of the venturi chamber and ends in the narrowest area thereof, the length of it therefore being relatively short. Therefore, the air intake is not free from pulsations.
  • a cover is provided above the venturi chamber so as to prevent dust and other foreign matter from entering the air bypass passageway.
  • DE-A-3 019 544 describes a fuel injector body assembly with an air conduit in which a fuel injector is centrically arranged and which comprises an air chamber in which an air cleaner is provided, a venturi chamber and a throttle valve chamber, whereby the air conduit is designed as one single piece.
  • the air bypass passageway begins upstream the narrowest section of the venturi chamber and ends near this section in the air conduit. It comprises two portions, a first portion which is approximately parallel to the axis of the venturi chamber and a second, end portion perpendicular thereto. The length of the air bypass passageway therefore is rather short which brings up the risk of pulsations.
  • a fuel injection body assembly comprising an air conduit consisting of an air chamber, a venturi chamber and a throttle chamber, and an injector being mounted in the vicinity of the center of the air conduit.
  • the air inlet conduit is made of different separate members.
  • the air flow meter is arranged directly in the air stream, and no air bypass passageway is provided.
  • an air flow rate meter device for measuring the intake air of an internal combustion engine is known.
  • a hot wire element is disposed in a passageway by-passing the venturi portion of the manifold.
  • the inlet and the outlet opening of the bypass passageway are formed as a small annular slot directed in the circumferential direction and disposed at the upper and lower end of the venturi portion, respectively.
  • This slotted openings expand into a narrow continuous annular space defined by the conical outer surface at the upper edge of the venturi portion, wherein lugs at a sleeve fill this annular space and divide that space into several short portions. For this reason the air does not flow sufficiently uniformly in the portion of the bypass passageway comprising the hot wire element.
  • the solution in accordance with the invention is based on the principle of increasing the length of the air bypass passageway, while keeping it mounted inside the fuel injector body assembly. This is performed by forming a part of the air bypass passageway as a ring segment shaped portion provided at the joint interface of the air chamber part and the venturi chamber part. Thereby the height of the fuel injector body can remain unchanged. Since the ring shaped portion of the passageway is disposed at the interface of the air chamber part and of the venturi chamber part, it can be made by providing grooves at the joint surfaces thereof, forming an air bypass passageway after connection of these parts.
  • Figs. 1 and 2 show a first embodiment of the fuel injector body assembly according to the invention.
  • a throttle valve 1 is mounted in a throttle chamber part forming a throttle chamber 2, which constitutes, together with an air chamber part forming an airchamber4 and a venturi chamber part forming a venturi chamber 5, an air conduit 12.
  • the air chamber part is connected with its upper end to an air cleaner 3.
  • the air conduit 12 is accordingly composed of three members which are fixedly connected.
  • the lower end of the air chamber part is connected to the venturi chamber part through a gasket 1 1 for avoiding air leaks, while the venturi chamber part is connected with its upper end to the air chamber part and with its lower end to the throttle chamber part, with an insulator 1 2 being arranged between these parts for avoiding heat transfer.
  • the venturi chamber part has a venturi structure 6 provided on its inner peripheral surface which is open in a bell shaped form at the upper portion which is joined to the air chamber part to reduce thereby the diameter of the air conduit 12.
  • a fuel injector 7 is supported by an injector support 8 located in a central portion of the air conduit 12 and comprises a lower injector support 9 secured to the wall of the venturi chamber 5 and an upper injector support 10 secured to the wall of the air chamber 4.
  • the lower injector support 9 is open at its upstream end for receiving the fuel injector 7 so that its nozzle is directed against the throttle valve 1.
  • the upper injector support 10 is open at its downstream end and connected to the open upstream end of the lower injector support 9 so as to support the injector 7 is hermetically sealed condition in the injector support 8.
  • the upper and lower injector supports 9 and 10 are secured to the walls of the venturi chamber 5 and the air chamber 4 through upper support arms 11A and lower support arms 11B, respectively.
  • the air conduit 12 provides a circutarair channel 12Athrough which air is supplied to the throttle valve 1.
  • the lower injector support 9 has a conical forward end portion to obtain good mixing of air with fuel injected through the nozzle of the fuel injector 7.
  • the joint interface between the air chamber part and the venturi chamber part has a groove formed therein to provide an air bypass passageway 13 to allow a portion of the air intake to flow in a bypass stream.
  • the air bypass passageway 13 is in the form of an arc and concentric with the air channel 12A, i.e. following the inner peripheral wall of the air conduit 12.
  • the air bypass passageway 13 has an inlet opening 14 provided in the air chamber 4 and an outlet opening 15 in the venturi structure 6 of the venturi chamber 5.
  • the inlet opening 14 opens peripherally at the inner peripheral surface of the wall of the air chamber 4.
  • the inlet opening 14 is open in the form of an arc which is concentric with the air channel 12A.
  • a hot wire airflow meter 16 is mounted in the vicinity of the outlet opening 15 in the air bypass passageway 13. More specifically, the hot wire air flow meter 16 is located inwardly of the outlet-opening 15 of the air bypass passageway 13 so that it will be cooled by air flowing in the air bypass stream through the air bypass passageway 13.
  • the hot wire air flow meter 16 is electrically connected to an airflow rate measuring circuit 17 mounted on an outer surface of the venturi chamber part.
  • air drawn by suction into the engine flows through the air channel 12A.
  • a portion of the air intake is introduced into the air bypass passageway 13formed at the joint interface between the airchamber part and the venturi chamber part by virtue of the pressure difference existing between the inlet opening 14 and the outlet opening 15 of the air bypass passageway 13, so that the amount of air intake is measured by the hot wire air flow meter 16 while the hot wire itself is cooled.
  • the fuel is pressurized by a fuel pump (not shown) and fed through a fuel pipe 19 located in the lower support arms 11 B into the fuel injector 7 where it is injected in a controlled manner by means of the period of time and the number of times the injector valve is opened.
  • the air-fuel ratio of the air fuel mixture supplied to the engine is controlled by processing information, such as the amount of air intake, the opening degree of the throttle valve, the pressure of the air intake, the engine speed, the atmospheric pressure, the ambient temperature, the engine temperature, etc., by means of a microcomputer and deciding the amount of fuel injected through the fuel injector 7 and the corresponding injection timing.
  • the fuel injector body assembly in conformity with the invention offers the following advantages.
  • the arrangement of the air intake measuring means comprising the air bypass passageway 13 and the hot wire airflow meter 16 inside the fuel injector body assembly allows to increase the length of the air bypass passageway 13 without the risk of having the air measuring means damaged by foreign matters impinging thereon and without increasing the length of the fuel injector body assembly which would otherwise be necessary because of the arcuate form of the air bypass passageway 13. This is conducive to increased precision of the air intake measurement and allows a compact construction of the fuel injector body assembly.
  • the composition of the upper portion of the air conduit 12 of the air chamber part and the venturi chamber part makes it possible to mount the fuel injector 7 and to form the air bypass passageway 13 at the same time, which improves the productivity.
  • Figs. 3 and 4 shows a second embodiment which is distinct from the first embodiment in that the air bypass passageway 13 has an inlet opening 20 of the dynamic pressure type. More specifically, the inlet opening 20 of the air bypass passageway 13 opens toward the upstream side of the air channel whereby a portion of the air intake is directly introduced into the air bypass passageway 13.
  • FIG. 5 and 6 A third embodiment will be described with reference to Figs. 5 and 6 in which parts similar to those shown in Figs. 1 to 4 are designated by the same reference numerals and signs.
  • the inlet opening 21 for introducing a portion of the air intake into the air bypass passageway 13 is provided in the side wall of the upper injector support 10.
  • an inlet portion 22 of the air bypass passageway 13 is formed in the upper support arms 11Aof the upper injector support 10 which is in communication with an inner space of the injector support 8;
  • the air intake is led through the air conduit 12 to the throttle valve 1.
  • a portion of the air intake is introduced into the air bypass passageway 13 by virtue of the pressure difference between the inlet opening 21 and the outlet opening 15 thereof.
  • the portion of the air intake flowing through the air bypass passageway 13 joins the air stream flowing through the air conduit at the outlet opening 15.
  • a turbulent flow B of air develops at the upper end of the venturi structure 6 at which the inner diameter of the air conduit shows a sudden change.
  • the turbulent flow B of air exerts almost no influence on the inlet opening 21 of the air bypass passageway 13.
  • FIG. 7 and 8 Afourth embodiment is shown in Figs. 7 and 8 in which the inner space of the injector support 8 is merely shaped to contain the fuel injector 7, and the inlet portion 22 of the air bypass passageway 13 is formed in the head portion of the upper injector support 10 while an inlet opening 23 is formed in the side wall of the head portion.
  • the fourth embodiment is distinct from the other embodiments in that the inlet opening 23 directly opens in the side wall, and not through the inner space of the injector support 8.
  • the embodiment shown in Figs. 7 and 8 operates in the same manner and achieves the same results as the embodiments shown in Figs. 1 to 6.
  • the output voltage V out of the hot wire air flow meter 16 changes in dependence of the amount of air intake G A as shown in Fig. 9 depending on the relative direction of the inlet of the air cleaner and the inlet openings 21, 23 of the air bypass passageway 13. For example, when the inlet opening of the air cleaner is disposed in the same direction as the inlet openings 21,23 of the air bypass passageway 13, the amount of air flowing through the air bypass passageway 13 increases as shown by the dashed curve in Fig.
  • a shield wall is provided in a fifth embodiment of the invention shown in a sectional view of Fig. 10, to render the inlet openings 21, 23 of the air bypass passageway 13 impervious to the influences exerted by the dynamic pressure of air drawn through the air cleaner.
  • a ring shaped shield wall 25 is provided which surrounds the outer periphery of the upper part of the upper injector support 10 at which the inlet opening 24 of the air bypass passageway 13 is formed.
  • the shield wall 25 is juxtaposed against the inlet opening 24 with a predetermined spacing therebetween and surrounds the peripheral surface as a whole including the inlet opening 24.
  • the shield wall 25 extends unitarily from the upper injector support 10, and is provided with respect to the inlet 26 of the air cleaner mounted on the air chamber part in such a manner that it is in face- to-face relation to the inlet opening 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Measuring Volume Flow (AREA)

Claims (14)

1. Kraftstoffeinspritzdüsen-Aggregat, umfassend
(a) eine Luftleitung (12), die aus folgenden Einzelteilen besteht:
- einem Lufkammerteil (4), der eine Luftkammer bildet und mit seinem Oberende an einen Luftfilter anschließbar ist,
- einem Lufttrichterkammerteil (5), der eine Lufttrichterkammer bildet und mit seinem Oberende fest mit dem Unterende des Luftkammerteils (4) verbunden ist, und
- einem Drosselklappenkammerteil (2), der eine Drosselklappenkammer bildet, eine Drosselklappe (1) aufnimmt und mit dem Unterende des Lufttrichterkammerteils (5) fest verbunden ist,
(b) eine Kraftstoffeinspritzdüse (7), die nahe der Mitte der Luftleitung (12) stromauf der Drosselklappe (1) durch Tragarme (11A, 11 B) festgelegt ist,
(c) einen Luftbypaßkanal (13), dessen Einlaßöffnung (14, 20, 21, 23, 24) an der Stromaufseite der Lufttrichterkammer (5) und dessen Auslaßöffnung (15) in der Lufttrichterkammer (5) vorgesehen sind, und der einen ringsegmentförmigen Abschnitt enthält, der an der gemeinsamen Grenzfläche zwischen dem Luftkammerteil und dem Lufttrichterkammerteil ausgebildet und mit seinem einen Ende mit der Einlaßöffnung sowie mit seinem anderen Ende mit einem Teil des Luftbypaßkanals (13) verbunden ist, in welchem ein Luftstrommesser (16) in der Nähe der Auslaßöffnung (15) angeordnet ist.
2. Kraftstoffeinspritzdüsen-Aggregat nach Anspruch 1, wobei die Luftleitung (12) in einer zur Luftströmungsrichtung senkrechten Ebene Kreisquerschnitt hat und wobei der ringsegmentförmige Abschnitt des Luftbypasskanals (13) mit der Luftleitung (12) konzentrisch ist.
3. Kraftstoffeinspritzdüsen-Aggregat nach Anspruch 1 oder 2, wobei die Eintrittsöffnung (14) des Luftbypasskanals (13) in der Innenumfangswand der Luftleitung (12) ausgebildet ist (Fig. 2).
4. Kraftstoffeinspritzdüsen-Aggregat nach Anspruch 1 oder 2, wobei die Eintrittsöffnung (20) des Luftbypasskanals (13) der Richtung des Luftstroms durch die Luftleitung (12) entgegengerichtet ist (Fig. 4).
5. Kraftstoffeinspritzdüsen-Aggregat nach einem derAnsprüche 1-4, wobei der ringsegmentförmige Abschnitt des Luftbypasskanals (13) durch Nuten gebildet ist, die in der gemeinsamen Grenzfläche von Luftkammerteil und Lufttrichterkammerteil ausgebildet sind.
Kraftstoffeinspritzdüsen-Aggregat nach einem der Ansprüche 1-5, wobei eine den Luftaustritt verhindernde Dichtung (11) an der gemeinsamen Grenzfläche von Luftkammerteil und Lufttrichterkammerteil vorgesehen ist.
Kraftstoffeinspritzdüsen-Aggregat nach einem der Ansprüche 1-6, wobei an einer Außenwandfläche des Lufttrichterkammerteils ein Luftdurchsatz-Meßkreis (17) angeordnet ist.
Kraftstoffeinspritzdüsen-Aggregat nach einem derAnsprüche 1-7, wobei die Kraftstoffeinspritzdüse (7) zwischen einer oberen Düsenhalterung (10), die auf an der Wand des Luftkammerteils befestigten oberen Haltearmen (11A) positioniert ist, und einer unteren Düsenhalterung (9), die auf an der Wand des Lufttrichterkammerteils befestigten unteren Haltearmen (11 B) positioniert ist, gehalten ist.
Kraftstoffeinspritzdüsen-Aggregat nach Anspruch 8, wobei eine Kraftstoffleitung (19) in den unteren Haltearmen (11 B) zur Kraftstoffzufuhr in die Kraftstoffeinspritzdüse vorgesehen ist.
Kraftstoffeinspritzdüsen-Aggregat nach Anspruch 8 oder 9, wobei die Eintrittsöffnung (23) des Luftbypasskanals sich in die obere Düsenhalterung (10) durch einen in den oberen Haltearmen (11A) ausgebildeten Eintrittsabschnitt (22) öffnet (Fig. 5, 6).
Kraftstoffeinspritzdüsen-Aggregat nach Anspruch 10, wobei die Eintrittsöffnung (23) rechtwinklig zur Strömungsrichtung der die Luftleitung (12) durchströmenden Luft angeordnet ist.
Kraftstoffeinspritzdüsen-Aggregat nach Anspruch 11, wobei die obere Düsenhalterung (11A) mit einer ringförmigen Abschirmwand (25) versehen ist, die rechtwinklig zur Achse der Eintrittsöffnung (24) angeordnet ist.
Kraftstoffeinspritzdüsen-Aggregat nach einem derAnsprüche 1-12, wobei zwischen dem Unterende des Lufttrichterkammerteils und dem Oberende des Drosselklappenkammerteils ein Isolierkörper (12) zur Vermeidung einer Wärmeübertragung zum Lufttrichterkammerteil vorgesehen ist.
Kraftstoffeinspritzdüsen-Aggregat nach einem derAnsprüche 1-13, wobei in der Wand des Drosselklappenkammerteils eine Nut (18) für den Kühlwasserumlauf ausgebildet ist.
EP19830105627 1982-06-09 1983-06-08 Zusammensetzung eines Kraftstoffeinspritzventil Expired - Lifetime EP0096842B2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP57097715A JPS58214663A (ja) 1982-06-09 1982-06-09 単点燃料噴射装置
JP97715/82 1982-06-09
JP109994/82 1982-06-28
JP57109994A JPS59618A (ja) 1982-06-28 1982-06-28 吸入空気量検出装置

Publications (3)

Publication Number Publication Date
EP0096842A1 EP0096842A1 (de) 1983-12-28
EP0096842B1 EP0096842B1 (de) 1987-03-04
EP0096842B2 true EP0096842B2 (de) 1994-06-08

Family

ID=26438866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830105627 Expired - Lifetime EP0096842B2 (de) 1982-06-09 1983-06-08 Zusammensetzung eines Kraftstoffeinspritzventil

Country Status (2)

Country Link
EP (1) EP0096842B2 (de)
DE (1) DE3370056D1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6282240A (ja) * 1985-10-04 1987-04-15 Hitachi Ltd 吸入空気量測定装置
DE3539015A1 (de) * 1985-11-02 1987-05-07 Vdo Schindling Anordnung mit einem luftmassenmesser fuer eine brennkraftmaschine
JPH081141B2 (ja) * 1986-09-03 1996-01-10 株式会社日立製作所 内燃機関の吸気装置
DE4128448A1 (de) * 1991-08-28 1993-03-04 Bosch Gmbh Robert Gehaeuse fuer einen luftmassenmesser
JP4077266B2 (ja) * 2002-07-30 2008-04-16 ヤマハ発動機株式会社 自動二輪車用エンジンの燃料供給装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047462B2 (ja) * 1978-06-02 1985-10-22 株式会社日立製作所 電子制御燃料噴射装置の吸入空気量計測装置
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
DE3019544A1 (de) * 1980-05-22 1981-11-26 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffversorgungsanlage
DE3032067A1 (de) * 1980-08-26 1982-04-15 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzanlage

Also Published As

Publication number Publication date
EP0096842A1 (de) 1983-12-28
EP0096842B1 (de) 1987-03-04
DE3370056D1 (en) 1987-04-09

Similar Documents

Publication Publication Date Title
US5186044A (en) Air flow rate measuring device for an internal combustion engine
US5789673A (en) Thermal type air flow measuring instrument for internal combustion engine
US4546748A (en) Fuel injection system
EP0096842B2 (de) Zusammensetzung eines Kraftstoffeinspritzventil
US6422070B2 (en) Device for measuring the mass of a flowing medium
US6189379B1 (en) Thermal type air flow measuring instrument for internal combustion engine
KR940002189B1 (ko) 내부 설치 풍속계를 구비한 드로틀 몸체
JPS58135916A (ja) 内燃機関用熱式流量計
CA1278705C (en) Intake air flow sensor
US4742711A (en) Arrangement having an air-mass meter for an internal combustion engine
KR900001464B1 (ko) 열선식 공기유량계
KR910000359B1 (ko) 흡입공기량 측정장치
EP0085987B1 (de) Kraftstoffversorgungseinrichtung für Verbrennungskraftmaschine
JPS62162737A (ja) 内燃機関のためのエアフロ−メ−タを備えた装置
US4742710A (en) Arrangement having an air-mass meter for an internal combustion engine
JPS6361734A (ja) 内燃機関の吸気装置
JPH094487A (ja) 内燃機関用空気流量測定装置
US4870857A (en) Throttle body with internally mounted anemometer
US4986116A (en) Air flow meter for internal combustion engine
US5009681A (en) Air inlet chamber for a mixture former of a motor vehicle
JPH08297039A (ja) 発熱抵抗式空気流量測定装置
JPH11223543A (ja) 内燃機関用空気流量測定装置
JPH089612Y2 (ja) 内燃機関の吸入空気流量計測装置
JPH0138495Y2 (de)
JPS58214663A (ja) 単点燃料噴射装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19840507

RBV Designated contracting states (corrected)

Designated state(s): CH DE FR GB IT LI

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 3370056

Country of ref document: DE

Date of ref document: 19870409

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: ROBERT BOSCH GMBH

Effective date: 19870919

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19890512

Year of fee payment: 7

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910828

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920630

Ref country code: CH

Effective date: 19920630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930528

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930830

Year of fee payment: 11

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 19940608

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): CH DE FR GB IT LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940608

EN3 Fr: translation not filed ** decision concerning opposition
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950301

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO