EP0357498A1 - Kraftstoffeinspritzvorrichtung mit einer Belüftungskammer - Google Patents
Kraftstoffeinspritzvorrichtung mit einer Belüftungskammer Download PDFInfo
- Publication number
- EP0357498A1 EP0357498A1 EP89402348A EP89402348A EP0357498A1 EP 0357498 A1 EP0357498 A1 EP 0357498A1 EP 89402348 A EP89402348 A EP 89402348A EP 89402348 A EP89402348 A EP 89402348A EP 0357498 A1 EP0357498 A1 EP 0357498A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cap
- nose
- injector
- pierced
- aeration chamber
- 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
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1853—Orifice plates
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
- F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit
-
- 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
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
-
- 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
- F02M69/04—Injectors peculiar thereto
- F02M69/047—Injectors peculiar thereto injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles
Definitions
- the invention relates to fuel injection devices for an internal combustion engine; it finds a particularly important application in injection devices for so-called "multipoint" systems, in which each engine combustion chamber is provided with an injection device which opens in the vicinity of the corresponding intake valve.
- the nozzle of the injector is placed near the combustion chamber of the engine which tends to bring it to high temperature, which results in fouling of the nose by the products or additives contained in the fuel supplied. by the injector.
- the outlet of the passage in the injector nose is connected to an air source. It is also known to compensate for the direct air supply thus produced by giving the minimum opening of the air intake butterfly a value slightly lower than that which would be adopted in the absence of aeration of the injectors.
- the invention aims to provide an injection device provided with a thermal protection cap, of the kind defined above, having improved fuel atomization characteristics at idle and at low engine loads, by air supply, and whose aeration chamber has well defined dimensions, and this by using only very simple means.
- the invention proposes in particular a device in accordance with the characterizing part of claim 1.
- the spacer plate may in particular have a bearing rim on the cap and bosses regularly distributed around the central bearing hole on the nose of the injector.
- the cap may have an opening significantly greater than that of a normal thermal protection cap: in this case, it is the central hole of the plate which has a diameter just sufficient to allow the jet of jet to pass through to the intake valve. fuel supplied by the injector.
- the cap can be a simple molded piece of insulating plastic and the spacer plate can be a simple piece of shaped sheet metal.
- the injection device 10 shown in FIG. 1 is fixed to the intake manifold 12 of an engine so as to project a jet of fuel towards an intake valve 14.
- the injector is placed in a passage formed in the tubing 12 and opening onto the cylinder head. It can be viewed as comprising a rear body 16 connected to a fuel supply line 18 and to a connector 19 and a nose 20 of reduced diameter.
- An O-ring 22 carried by the nose 20 of the injector bears against the wall of the passage formed in the tube 12 and separates said tube in a leaktight manner from the ambient atmosphere.
- a fuel spouting channel 24 closable by a needle 26 whose movements are controlled by an electromagnetic coil housed in the body and not shown.
- the needle is extended by a stud 28 of diameter smaller than that of the channel 24 and protruding from it, so that the fuel spurts in the passage limited by the channel 24 and the stud 28.
- a cap 30 On the nose 20 of the injector is fitted a cap 30, generally made of insulating plastic. An internal circumferential rib 32 of this cap is provided for snapping into a groove 34 of the nozzle nose in order to lock the cap in a location such that an aeration chamber 38 remains between the nose and the bottom of the cap. .
- the cap is pierced with a central opening 36 of sufficient diameter to allow the free exit of the jet of fuel supplied by the injector.
- the chamber 38 is supplied with air, for example from the air supply inlet of the engine.
- the side vents 40 of the cap four in number in the embodiment shown in Figures 2 and 3, communicate the aeration chamber 38 with an annular space 42 delimited in the passage of the tubing by the cap 30, the O-ring 22 and a second O-ring 44 trapped in the groove of the cap.
- the annular space communicates with the air intake of the engine by a channel 46 formed in the tube and by a pipe 48 ( Figure 1).
- a spacer plate 50 is disposed between the bottom of the cap 30 and the nose 20 of the injector.
- This plate makes it possible to precisely adjust the spacing between the bottom of the cap and the nose.
- it comprises several bosses 52, four in number in the embodiment shown in Figures 2 and 4, pressing against the nose, and a peripheral part intended to rest on the bottom of the cap via 'An O-ring 54.
- This seal seals the connection between spacer plate and cap.
- its elasticity keeps the bosses 52 applied against the nose 20.
- the plate 50 is pierced with a calibrated central hole 56 surrounding the end of the stud with which it constitutes a calibrated passage for leaving the jet of fuel and air coming from. from the room. We see in Figure 2 that this arrangement leads to provide in the cap 30 an opening 36 of larger diameter, so as not to disturb the spraying of the fuel sent to the engine.
- aeration air is sucked through the channel 46, the annular space 42, the vents 40 and the aeration chamber 38. This air mixes with the fuel and ensures that spraying remains satisfactory at idle and at low engine loads.
- the cooling by the current of fresh air which sweeps the nozzle nose has an effect which is added to the thermal insulation provided by the cap 30 and the plate. spacer 50 and reduces the heating and fouling of the injector.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8811376 | 1988-08-30 | ||
FR8811376A FR2635827B1 (fr) | 1988-08-30 | 1988-08-30 | Dispositif d'injection de combustible a chambre d'aeration |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0357498A1 true EP0357498A1 (de) | 1990-03-07 |
EP0357498B1 EP0357498B1 (de) | 1992-07-29 |
Family
ID=9369607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89402348A Expired - Lifetime EP0357498B1 (de) | 1988-08-30 | 1989-08-28 | Kraftstoffeinspritzvorrichtung mit einer Belüftungskammer |
Country Status (5)
Country | Link |
---|---|
US (1) | US4957241A (de) |
EP (1) | EP0357498B1 (de) |
JP (1) | JP2667017B2 (de) |
DE (1) | DE68902289T2 (de) |
FR (1) | FR2635827B1 (de) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991012427A1 (de) * | 1990-02-16 | 1991-08-22 | Robert Bosch Gmbh | Vorrichtung zur einspritzung eines brennstoff-luft-gemisches |
WO1991017358A1 (de) * | 1990-05-04 | 1991-11-14 | Robert Bosch Gmbh | Vorrichtung zur einspritzung eines brennstoff-gas-gemisches |
WO1991019900A1 (de) * | 1990-06-21 | 1991-12-26 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE4104020A1 (de) * | 1991-02-09 | 1992-08-13 | Bosch Gmbh Robert | Vorrichtung zur einspritzung eines brennstoff-gas-gemisches |
WO1992014053A1 (en) * | 1991-02-07 | 1992-08-20 | Siemens Aktiengesellschaft | Air assist atomizer for fuel injector |
DE4205709A1 (de) * | 1992-02-25 | 1993-08-26 | Bosch Gmbh Robert | Gasverteiler fuer brennstoffeinspritzanlagen |
WO1996023968A1 (de) * | 1995-02-02 | 1996-08-08 | Robert Bosch Gmbh | Brennstoffeinspritzventil für brennkraftmaschinen |
EP0743448A1 (de) * | 1995-05-19 | 1996-11-20 | Siemens Automotive Corporation | Luftunterstütztereinspritzventil und Umfassungsbuchse des Ventils |
WO1997001706A2 (en) * | 1995-06-27 | 1997-01-16 | Siemens Automotive Corporation | Air assist fuel injector |
US6626159B1 (en) | 1994-09-01 | 2003-09-30 | Robert Bosch Gmbh | Gas distributor apparatus for fuel-injection systems |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5449120A (en) * | 1991-06-11 | 1995-09-12 | Nippondenso Co., Ltd. | Fuel feed apparatus of internal combustion engine |
DE4129834A1 (de) * | 1991-09-07 | 1993-03-11 | Bosch Gmbh Robert | Vorrichtung zur einspritzung eines brennstoff-gas-gemisches |
US5174505A (en) * | 1991-11-01 | 1992-12-29 | Siemens Automotive L.P. | Air assist atomizer for fuel injector |
DE4312756A1 (de) * | 1993-04-20 | 1994-10-27 | Bosch Gmbh Robert | Vorrichtung zur Einspritzung eines Brennstoff-Gas-Gemisches |
DE4415992A1 (de) * | 1994-05-06 | 1995-11-09 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE4416610A1 (de) * | 1994-05-11 | 1995-11-16 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE19827136A1 (de) * | 1998-06-18 | 1999-12-23 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
US20090235898A1 (en) * | 2008-03-19 | 2009-09-24 | Short Jason C | Fuel injector isolator |
JP6376655B2 (ja) * | 2014-09-17 | 2018-08-22 | ダイハツ工業株式会社 | 内燃機関 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1189160A (fr) * | 1956-09-10 | 1959-09-30 | Gen Motors Corp | Injecteur pour moteurs à combustion interne |
FR2103956A5 (de) * | 1970-08-04 | 1972-04-14 | Bosch | |
FR2281506A1 (fr) * | 1974-08-06 | 1976-03-05 | Motobecane Ateliers | Support d'injecteur pour moteurs a injection directe |
DE2641377A1 (de) * | 1976-09-15 | 1978-03-16 | Kloeckner Humboldt Deutz Ag | Zylinderkopf fuer eine hubkolbenbrennkraftmaschine |
DE3135878A1 (de) * | 1981-09-10 | 1983-03-24 | Robert Bosch Gmbh, 7000 Stuttgart | Vorrichtung zur kuehlung eines an einer brennkraftmaschine mit einem luftansaugrohr angeordneten kraftstoffeinspritzventiles |
US4434766A (en) * | 1982-05-07 | 1984-03-06 | Toyota Jidosha Kabushiki Kaisha | Air assist device of fuel injection type internal combustion engine |
US4519370A (en) * | 1983-02-23 | 1985-05-28 | Toyota Jidosha Kabushiki Kaisha | Fuel injector electronically controlled engine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50109023U (de) * | 1974-02-19 | 1975-09-06 | ||
JPS5482528A (en) * | 1977-12-14 | 1979-06-30 | Toyota Motor Corp | Engine air-fuel-mixture supply system |
JPS5543269A (en) * | 1978-09-22 | 1980-03-27 | Toyota Central Res & Dev Lab Inc | Intermittent gas injection valve |
US4836453A (en) * | 1988-02-22 | 1989-06-06 | Outboard Marine Corporation | Fuel injector with continuous air flow |
-
1988
- 1988-08-30 FR FR8811376A patent/FR2635827B1/fr not_active Expired - Fee Related
-
1989
- 1989-08-28 DE DE8989402348T patent/DE68902289T2/de not_active Expired - Fee Related
- 1989-08-28 EP EP89402348A patent/EP0357498B1/de not_active Expired - Lifetime
- 1989-08-29 JP JP1222753A patent/JP2667017B2/ja not_active Expired - Fee Related
- 1989-08-30 US US07/400,540 patent/US4957241A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1189160A (fr) * | 1956-09-10 | 1959-09-30 | Gen Motors Corp | Injecteur pour moteurs à combustion interne |
FR2103956A5 (de) * | 1970-08-04 | 1972-04-14 | Bosch | |
FR2281506A1 (fr) * | 1974-08-06 | 1976-03-05 | Motobecane Ateliers | Support d'injecteur pour moteurs a injection directe |
DE2641377A1 (de) * | 1976-09-15 | 1978-03-16 | Kloeckner Humboldt Deutz Ag | Zylinderkopf fuer eine hubkolbenbrennkraftmaschine |
DE3135878A1 (de) * | 1981-09-10 | 1983-03-24 | Robert Bosch Gmbh, 7000 Stuttgart | Vorrichtung zur kuehlung eines an einer brennkraftmaschine mit einem luftansaugrohr angeordneten kraftstoffeinspritzventiles |
US4434766A (en) * | 1982-05-07 | 1984-03-06 | Toyota Jidosha Kabushiki Kaisha | Air assist device of fuel injection type internal combustion engine |
US4519370A (en) * | 1983-02-23 | 1985-05-28 | Toyota Jidosha Kabushiki Kaisha | Fuel injector electronically controlled engine |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991012427A1 (de) * | 1990-02-16 | 1991-08-22 | Robert Bosch Gmbh | Vorrichtung zur einspritzung eines brennstoff-luft-gemisches |
WO1991017358A1 (de) * | 1990-05-04 | 1991-11-14 | Robert Bosch Gmbh | Vorrichtung zur einspritzung eines brennstoff-gas-gemisches |
WO1991019900A1 (de) * | 1990-06-21 | 1991-12-26 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
WO1992014053A1 (en) * | 1991-02-07 | 1992-08-20 | Siemens Aktiengesellschaft | Air assist atomizer for fuel injector |
DE4104020A1 (de) * | 1991-02-09 | 1992-08-13 | Bosch Gmbh Robert | Vorrichtung zur einspritzung eines brennstoff-gas-gemisches |
DE4205709A1 (de) * | 1992-02-25 | 1993-08-26 | Bosch Gmbh Robert | Gasverteiler fuer brennstoffeinspritzanlagen |
US6626159B1 (en) | 1994-09-01 | 2003-09-30 | Robert Bosch Gmbh | Gas distributor apparatus for fuel-injection systems |
WO1996023968A1 (de) * | 1995-02-02 | 1996-08-08 | Robert Bosch Gmbh | Brennstoffeinspritzventil für brennkraftmaschinen |
EP0743448A1 (de) * | 1995-05-19 | 1996-11-20 | Siemens Automotive Corporation | Luftunterstütztereinspritzventil und Umfassungsbuchse des Ventils |
WO1997001706A2 (en) * | 1995-06-27 | 1997-01-16 | Siemens Automotive Corporation | Air assist fuel injector |
WO1997001706A3 (en) * | 1995-06-27 | 1997-02-27 | Siemens Automotive Corp Lp | Air assist fuel injector |
Also Published As
Publication number | Publication date |
---|---|
JPH02140458A (ja) | 1990-05-30 |
FR2635827B1 (fr) | 1993-11-26 |
DE68902289T2 (de) | 1992-12-10 |
DE68902289D1 (de) | 1992-09-03 |
FR2635827A1 (fr) | 1990-03-02 |
US4957241A (en) | 1990-09-18 |
EP0357498B1 (de) | 1992-07-29 |
JP2667017B2 (ja) | 1997-10-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0357498B1 (de) | Kraftstoffeinspritzvorrichtung mit einer Belüftungskammer | |
EP0595696B1 (de) | Speisevorrichtung mit einer integrierten Sammelleitung | |
FR2489424A1 (fr) | Installation d'injection de carburant | |
WO2013121132A2 (fr) | Dispositif d'injection d'air et de carburant pour une chambre de combustion d'une turbomachine | |
FR2584454A1 (fr) | Culasse de moteur a combustion interne alimente par injection | |
EP1460264A1 (de) | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine, insbesondere eines Kraftfahrzeugs | |
FR2849200A1 (fr) | Detecteur de gaz a structure perfectionnee pour limiter les dommages thermiques | |
FR2803335A1 (fr) | Dispositif d'injection d'un carburant a l'interieur d'une chambre de combustion d'un cylindre d'un moteur a combustion interne | |
FR2722541A1 (fr) | Injecteur de carburant "bi-jet" a aassistance pneumatique de pulverisation, pour moteur a combustioninterne alimente par injection | |
EP2960482A2 (de) | Umwälzsystem für abgase | |
WO2018050999A1 (fr) | Chambre de combustion pour turbomachine comprenant des moyens pour améliorer le refroidissement d'une paroi annulaire dans le sillage d'un obstacle | |
EP0006770B1 (de) | Elektromagnetisches Ventil, insbesondere für einen Vergaser | |
EP3814616B1 (de) | Leitvorrichtung in einer brennkammer | |
FR2933045A1 (fr) | Dispositif d'admission d'air pour vehicule automobibile | |
EP0956442B1 (de) | Abgasrückführungsvorrichtung für eine brennkraftmaschine | |
EP4111041B1 (de) | Verbrennungsanlage | |
FR2527693A1 (fr) | Dispositif d'injection de carburant pour moteur a combustion interne | |
FR2719870A1 (fr) | Dispositif de recirculation des gaz d'échappement d'un moteur à combustion interne. | |
FR2661951A1 (fr) | Dispositif d'admission pour un moteur a combustion interne a gaz premelange. | |
FR2636676A1 (fr) | Dispositif pour l'injection de carburant dans la chambre a explosion d'un moteur a combustion interne a auto-allumage, comprenant un diaphragme regulant et dirigeant les jets de carburants et l'air aspire | |
FR2904377A3 (fr) | Systeme d'injection pour vehicule automobile a refroidissement ameliore et procede de fabrication d'un tel systeme d'injection | |
FR2738035A1 (fr) | Collecteur d'admission pour moteur a combustion interne | |
FR2924765A3 (fr) | Injecteur pour rampe d'injection | |
EP0475829A1 (de) | Vorrichtung zur Kraftstoffversorgung und Halterung mehrerer Kraftstoffeinspritzventile für Verbrennungsmotoren | |
FR3077092A1 (fr) | Circuit d’admission d’air optimisee d’un groupe motopropulseur de vehicule |
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 |
Kind code of ref document: A1 Designated state(s): DE ES GB IT SE |
|
17P | Request for examination filed |
Effective date: 19900306 |
|
17Q | First examination report despatched |
Effective date: 19910515 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES GB IT SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19920729 Ref country code: GB Effective date: 19920729 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19920729 |
|
REF | Corresponds to: |
Ref document number: 68902289 Country of ref document: DE Date of ref document: 19920903 |
|
ITF | It: translation for a ep patent filed |
Owner name: SOCIETA' ITALIANA BREVETTI S.P.A. |
|
GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 19920729 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20030807 Year of fee payment: 15 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050301 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050828 |