EP0057022A2 - Vorrichtung, geeignet zum Anreichern des Gemisches, geliefert vom Vergaser für Brennkraftmaschinen mit innerer Verbrennung - Google Patents
Vorrichtung, geeignet zum Anreichern des Gemisches, geliefert vom Vergaser für Brennkraftmaschinen mit innerer Verbrennung Download PDFInfo
- Publication number
- EP0057022A2 EP0057022A2 EP82200001A EP82200001A EP0057022A2 EP 0057022 A2 EP0057022 A2 EP 0057022A2 EP 82200001 A EP82200001 A EP 82200001A EP 82200001 A EP82200001 A EP 82200001A EP 0057022 A2 EP0057022 A2 EP 0057022A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- conduit
- circuit
- carburettor
- main
- idling
- 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
- F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
- F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
- F02M7/133—Auxiliary jets, i.e. operating only under certain conditions, e.g. full power
-
- 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
- F02M3/00—Idling devices for carburettors
- F02M3/08—Other details of idling devices
- F02M3/09—Valves responsive to engine conditions, e.g. manifold vacuum
Definitions
- the invention relates to carburettors for internal combustion engines and in particular to a system adapted to supply, under certain conditions of operation of the engine, additional fuel to the conventional main feed and idling circuits of the carburettor.
- Devices for supplying additional fuel to the aforesaid circuits are known; they mainly consist in additional fuel circuits controlled by a vacuum capsule whose movable partition actuated by the vacuum existing downstream of the throttle valve is capable of opening the connection means between the additional circuits and the main circuit or the idling circuit.
- Said devices do not supply the two aforesaid circuits simultaneously, but act separately with additional fuel in the first or second circuit; this not only involves the disadvantage of not solving the problems of bulkiness and economy of the used materials, but moreover does not permit to obtain a correct metering of the mixture in all operating conditions of the engine as the separate vacuum members act on the respective circuits, which are separate, in different ways and at different times.
- Another object of the invention is to provide a circuit controlled by a vacuum member adapted to minimize the times required for feeding the fuel to said main and idling circuits when the load applied to the engine increases rapidly from a low rate of rotation.
- the device according to the invention is characterized by what is set forth in the first claim; other characteristics, advantages and embodiments of the invention are set forth in the subsequent claims and in the description referring particularly to the accompanying drawing given by way of a non-limiting example.
- the invention is incorporated in a carburettor with only one main conduit 1 controlled by the throttle valve 2 actuated by the driver; arranged in the main conduit 1 is a venturi 3 in the interior of which there is a centring member 3 which communicates directly with the emulsioning tube 5.
- This latter receives the fuel from the constant level float chamber, not shown; the fuel is metered by the main jet 6 and emulsified with air coming in known manner from the calibrated nozzle 7.
- the circuit 8 for the formation of the mixture supplied during the idling and low performance steps of the engine starts at the bottom of the emulsioning tube 5.
- the conduit 8 leads to the calibrated orifice 9 to which air is supplied from the calibrated nozzle 10 to form an emulsion which through the conduit 11 is fed into the main conduit 1 through a plurality of holes 12 arranged in the area controlled by the throttle valve 2.
- Said elements which are known per se constitute the main and idling circuits of the carburettor.
- the device according to the invention consists of a vacuum capsule 13 which is inwardly divided into two chambers 14 and 15, which do not communicate with each other, by means of an elastic diaphragm 16 reinforced in its central portion by a rigid disk 17 biassed by a spring 18 housed in the chamber 14 and more precisely in a cylindrical projection 19; said spring is adapted to bias the disk 17 towards the right with a predetermined load; secured to the right side of the disk 17 is a pin 20 adapted to shift under the action of the spring 18 the ball 21 from its sealing seat 22 against the action of a spring 23 arranged in the cavity 24 in front of the capsule 13.
- the chamber 15 of the capsule 13 communicates with the constant level float chamber, not shown, through a first and a second conduit C l and C 2 which respectively permit the flow of the fuel from the float chamber to the chamber 15 and from the latter to the float chamber;
- the conduit C 2 mainly has the purpose of removing from the chamber 15 any fuel vapour bubbles which may form therein.
- the chamber 15 When the ball 21 is removed from its seat 22 by the pin 20, the chamber 15 also communicates with the cavity 24 from which departs a conduit 25 which then extends in a vertical plane until it reaches a certain height over the constant level float chamber whereafter it extends horizontally; two branch conduits 26 and 27 depart from the horizontal portion of the conduit 25 and lead into the idling circuit 11 in the area of the calibrated orifice 9 and into the emulsioning tube 5, respectively.
- the two conduits 26 and 27 are provided with two calibrated orifices indicated by 28 and 29, respectively,whose functions will be explained in greater detail hereinafter.
- the chamber 14 of the capsule 13 communicates with the conduit 1 through a conduit 30 which transmits to it at any moment the vacuum prevailing downstream of the throttle valve 2.
- a fuel mixture is obtained whose fuel component is determined by the idling jet 9 and air coming both from the nozzle 10 and the nozzle 7 through the conduits 26 and 27 and the nozzle 28; as a result, the mixture is made lean to an extent limited by the dimensions of the nozzles through which the air flows.
- the diaphragm 16 and the disk 17 are urged to the right by the spring 18; the pin 20 removes the ball 21 from the seat 22 and the conduit 25 receives fuel from the float chamber along the described path to supply the main and idling circuits.
- a carburettor with particularly reduced basic dimensioning (of the main and idling circuits) which in itself does not permit to feed the engine with a mixture of the correct strength during high performance and at full power. This makes necessary an additional supply of fuel in these latter steps to ensure correct operation of the engine.
- the circuit controlled by the vacuum capsule 13 provides the main and idling circuits of the carburettor with an additional fuel supply to meet the feed requirements of the engine for high performance, but excludes this supply when the engine is idling or operating at low or medium performance.
- An appropriate dimensioning of the spring 18 with respect to the diaphragm 16 permits to open the seat 22 for lower vacuum values, for example of 200 mmHg, i.e. when the throttle valve 2 is sufficiently but not completely open and protects the centering member 4 from the pulsating effects of the engine. Under these conditions the supply of the additional fuel takes place both through the branch 26, which leads to the idling circuit, and the branch 27 which leads to the main circuit, as in both these circuits signals are acting which are sufficiently powerful to attract fuel from the conduit 25.
- the orifices 28 and 29 By appropriately dimensioning the orifices 28 and 29 it is possible to obtain a prevalence of the amount of fuel fed through the branch 26 over the amount of fuel fed through the branch 27 at least in the beginning of the operation of the circuit controlled by the capsule 13.
- the vacuum in the manifold diminishes, but the vacuum in the choke 3 increases; consequently, the supply of additional fuel through the conduit 26 diminishes progressively, but the supply of additional fuel through the conduit 27 increases progressively.
- the throttle valve 2 has reached the completely opened condition, the idling circuit does not supply fuel because the signal of delivery actuation in the area of the holes 12 becomes very low; the additional fuel is only supplied by the branch 27 which feeds the main circuit. In this manner the engine is supplied with a mixture of the correct strength also in the completely open condition when the enrichment becomes particularly important due to the pulsating effect.
- the device according to the invention permits the engine to be accelerated from a low rate of rotation to reach within the shortest possible time values of rotation and torque permitted by partial, even if large, opening of the throttle valve 2 and this as a result of the short times of response of the circuits controlled by the capsule 13. Said times of response remain low even though the ascending column of the channel 25 contains a considerable hydrostatic head over the level of the float chamber.
- conduit 27 may lead into the tube 5 at its base through an.orifice, possibly a calibrated orifice, arranged parallel to the main jet 6 and which replaces the calibrated orifice 29.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82200001T ATE29555T1 (de) | 1981-01-27 | 1982-01-04 | Vorrichtung, geeignet zum anreichern des gemisches, geliefert vom vergaser fuer brennkraftmaschinen mit innerer verbrennung. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT03317/81A IT1145013B (it) | 1981-01-27 | 1981-01-27 | Dispositivo atto ad arrichire la miscela erogata da un carburatore per motore a combustione interna |
IT331781 | 1981-01-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0057022A2 true EP0057022A2 (de) | 1982-08-04 |
EP0057022A3 EP0057022A3 (en) | 1983-10-26 |
EP0057022B1 EP0057022B1 (de) | 1987-09-09 |
Family
ID=11104861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82200001A Expired EP0057022B1 (de) | 1981-01-27 | 1982-01-04 | Vorrichtung, geeignet zum Anreichern des Gemisches, geliefert vom Vergaser für Brennkraftmaschinen mit innerer Verbrennung |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0057022B1 (de) |
JP (1) | JPS57143151A (de) |
AR (1) | AR229602A1 (de) |
AT (1) | ATE29555T1 (de) |
BR (1) | BR8200281A (de) |
DE (1) | DE3277218D1 (de) |
ES (1) | ES508661A0 (de) |
IT (1) | IT1145013B (de) |
PL (1) | PL139524B1 (de) |
PT (1) | PT74308B (de) |
RO (1) | RO83141B (de) |
SU (1) | SU1176850A3 (de) |
YU (1) | YU17582A (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0115447A1 (de) * | 1983-01-03 | 1984-08-08 | Solex | Vergaser mit von einem elektromagnetischen Ventil gesteuerter Anreicherungsvorrichtung |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2649290A (en) * | 1946-02-15 | 1953-08-18 | Solex Soc | Carburetor |
US2705123A (en) * | 1949-10-11 | 1955-03-29 | Robert H Hieger | Economizer unit for carburetor |
FR2408040A1 (fr) * | 1977-11-02 | 1979-06-01 | Peugeot | Dispositif enrichisseur pour carburateur |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS411850Y1 (de) * | 1964-01-23 | 1966-02-10 | ||
JPS5078721A (de) * | 1973-11-20 | 1975-06-26 | ||
JPS51101634A (en) * | 1975-03-05 | 1976-09-08 | Nippon Carbureter | Kikakino kongohichoseisochi |
JPS5420503U (de) * | 1977-07-13 | 1979-02-09 |
-
1981
- 1981-01-27 IT IT03317/81A patent/IT1145013B/it active
-
1982
- 1982-01-04 EP EP82200001A patent/EP0057022B1/de not_active Expired
- 1982-01-04 AT AT82200001T patent/ATE29555T1/de not_active IP Right Cessation
- 1982-01-04 DE DE8282200001T patent/DE3277218D1/de not_active Expired
- 1982-01-12 ES ES508661A patent/ES508661A0/es active Granted
- 1982-01-14 AR AR288130A patent/AR229602A1/es active
- 1982-01-19 BR BR8200281A patent/BR8200281A/pt unknown
- 1982-01-19 PT PT74308A patent/PT74308B/pt unknown
- 1982-01-21 RO RO106397A patent/RO83141B/ro unknown
- 1982-01-25 JP JP57009040A patent/JPS57143151A/ja active Pending
- 1982-01-26 SU SU823381408A patent/SU1176850A3/ru active
- 1982-01-26 PL PL1982234833A patent/PL139524B1/pl unknown
- 1982-01-26 YU YU00175/82A patent/YU17582A/xx unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2649290A (en) * | 1946-02-15 | 1953-08-18 | Solex Soc | Carburetor |
US2705123A (en) * | 1949-10-11 | 1955-03-29 | Robert H Hieger | Economizer unit for carburetor |
FR2408040A1 (fr) * | 1977-11-02 | 1979-06-01 | Peugeot | Dispositif enrichisseur pour carburateur |
Non-Patent Citations (1)
Title |
---|
J. KASEDORF "Gemischaufbereitung" 1st edition, vol. I "Grundlagen der Vergaserreparatur und Einstellung" 1978, VOGEL-VERLAG, W}rzburg, pages 68-71 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0115447A1 (de) * | 1983-01-03 | 1984-08-08 | Solex | Vergaser mit von einem elektromagnetischen Ventil gesteuerter Anreicherungsvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
RO83141A (ro) | 1984-03-15 |
EP0057022B1 (de) | 1987-09-09 |
YU17582A (en) | 1988-04-30 |
PL139524B1 (en) | 1987-01-31 |
EP0057022A3 (en) | 1983-10-26 |
ATE29555T1 (de) | 1987-09-15 |
JPS57143151A (en) | 1982-09-04 |
ES8300377A1 (es) | 1982-11-01 |
ES508661A0 (es) | 1982-11-01 |
RO83141B (ro) | 1984-03-30 |
PT74308B (en) | 1983-08-24 |
BR8200281A (pt) | 1982-11-23 |
IT1145013B (it) | 1986-11-05 |
PT74308A (en) | 1982-02-01 |
AR229602A1 (es) | 1983-09-30 |
IT8103317A0 (it) | 1981-01-27 |
SU1176850A3 (ru) | 1985-08-30 |
PL234833A1 (de) | 1982-08-16 |
DE3277218D1 (en) | 1987-10-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3503594A (en) | Fuel system | |
US3409277A (en) | Metering jet adjustable fuel by-pass | |
US2431590A (en) | Auxiliary charge metering device | |
US2394663A (en) | Carburetor device | |
US4369749A (en) | Variable venturi carburetor | |
US1858835A (en) | Carburetor | |
US3346245A (en) | Carburetors for internal combustion engines | |
US2236595A (en) | Carburetor | |
US4495112A (en) | Variable venturi-type carburetor | |
EP0057022A2 (de) | Vorrichtung, geeignet zum Anreichern des Gemisches, geliefert vom Vergaser für Brennkraftmaschinen mit innerer Verbrennung | |
US2232035A (en) | Carburetor | |
US1931259A (en) | Carburetor | |
US4632788A (en) | Carburetor fuel feed system with bidirectional passage | |
US2209511A (en) | Carburetor | |
US4129622A (en) | Carburetor with an altitude compensator | |
US2807449A (en) | Carburetor construction | |
US2626790A (en) | Carburetor | |
US2512085A (en) | Carburetor nozzle | |
US3472494A (en) | Carburetor fuel supply system | |
US3361416A (en) | Carburetor choking device | |
US4473510A (en) | Carburetor having air fuel ratio adjusting means | |
US2362879A (en) | Carburetor | |
US4454080A (en) | Fuel flow automatic modulating and economizing carburetor jet assembly | |
US4178331A (en) | Two staged carburetor with arrangement for reducing fuel spillage | |
US1906982A (en) | Carburetor |
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): AT BE CH DE FR GB LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19830119 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: WEBER S.P.A. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: WEBER S.R.L. |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
REF | Corresponds to: |
Ref document number: 29555 Country of ref document: AT Date of ref document: 19870915 Kind code of ref document: T |
|
ET | Fr: translation filed | ||
REF | Corresponds to: |
Ref document number: 3277218 Country of ref document: DE Date of ref document: 19871015 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Effective date: 19880104 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19880131 Ref country code: CH Effective date: 19880131 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19880131 |
|
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 |
|
BERE | Be: lapsed |
Owner name: WEBER S.R.L. Effective date: 19880131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19880801 |
|
26N | No opposition filed | ||
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Effective date: 19890131 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19900126 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19900130 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19900131 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19900222 Year of fee payment: 9 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19910104 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19910105 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19910930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19911001 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 82200001.4 Effective date: 19910910 |