FI92242C - Pressure booster to supply diesel fuel to the injector - Google Patents
Pressure booster to supply diesel fuel to the injector Download PDFInfo
- Publication number
- FI92242C FI92242C FI912170A FI912170A FI92242C FI 92242 C FI92242 C FI 92242C FI 912170 A FI912170 A FI 912170A FI 912170 A FI912170 A FI 912170A FI 92242 C FI92242 C FI 92242C
- Authority
- FI
- Finland
- Prior art keywords
- piston
- pressure
- line
- booster
- chamber
- Prior art date
Links
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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
9224292242
Paineenkohottaja diesel polttoaineen syottåmiseksi ruiskutus-suuttimelle. - Tryckhojare for matning av di esel brans 1e till sprutmunstycket.Booster to supply diesel fuel to the injector. - Tryckhojare for matning av di esel brans 1e till sprutmunstycket.
Keksinnon kohteena on paineenkohottaja di esel polttoaineen syottåmiseksi ruiskutussuuttimel1e.The invention relates to a pressure booster di esel for feeding fuel to an injection nozzle.
Dieselmoottorissa polttoaine on ruiskutettava palotilaan pai-neella, joka riittåvåsti ylittåå palotilan puristuspaineen.In a diesel engine, fuel must be injected into the combustion chamber at a pressure that sufficiently exceeds the compression pressure of the combustion chamber.
Mitå suuremmal1a paineella ruiskutus voidaan suorittaa, sita hienojakoisempana saadaan polttoaine palotilaan, mistå puoles-taan seuraa tåydel1isempi palaminen ja puhtaammat palokaasut. Ruiskutuspaineel1a voidaan vaikuttaa myos siihen kuvioon, jolla polttoaine leviåå ruiskutussuuttimesta palotilaan.The higher the pressure at which injection can be performed, the finer the fuel in the combustion chamber, which in turn results in more complete combustion and cleaner combustion gases. The injection pressure can also affect the pattern in which the fuel spreads from the injector to the combustion chamber.
Keksinnon tarkoituksena on saada aikaan rakenteeltaan yksin-kertainen ja toimintavarma paineenkohottaja, jolla polttoaineen syottopaine voidaan kohottaa moninkertaiseksi verrattuna kåy-tettåvisså olevan painelinjan paineeseen.The object of the invention is to provide a pressure booster with a simple and reliable construction, by means of which the fuel supply pressure can be increased many times compared to the pressure of a usable pressure line.
Tåmå tarkoitus saavutetaan keksinnollå oheisessa patenttivaa-timuksessa 1 esitettyjen tunnusmerkkien perusteella.This object is achieved by the invention on the basis of the features set out in the appended claim 1.
Seuraavassa keksinnon eråstå suoritusesimerkkiå selostetaan låhemmin viittaamalla oheiseen piirustukseen, jossa kuvio 1 esittåå keksinnon mukaisen paineenkohottajan halki-leikkausta ja kuvio 2 esittåå paineenkohottajan liikkuvaa måntåå.In the following, an embodiment of the invention will be described in more detail with reference to the accompanying drawing, in which Fig. 1 shows a cross-section of a booster according to the invention and Fig. 2 shows a movable piston of a booster.
Kuvio 3 esittåå esimerkkiå paine-, ohjaus- ja virtaus1 injakaa-viosta, johon keksinnon mukainen paineenkohottaja on sijoitettavissa.Figure 3 shows an example of a pressure, control and flow1 in which a booster according to the invention can be placed.
2 922422 92242
Paineenkohottajaan kuuluu runkokappaleeseen 21 tehty porrastet-tu sy 1interiti1 a 1, 2, 3, jossa on tietyisså rajoissa edesta-kaisin liikkumaan pååsevå måntå 4. Måntå 4 jakaa sy1interiti 1 an ainakin kolmeen kammioon 1, 2 ja 3, joita rajoittaa vastaavasti ainakin kolme pinta-alaltaan eri suurta måntåpintaa 5, 6 ja 7. Pinta-alaltaan suurimman måntåpinnan 5 rajoittama kammio 1 on yhteydesså ohjauspainelin jaan 11, jossa on ohjattava venttiili 15 ohjauspaineen kytkemiseksi påålle ja pois, Kysymyksesså voi olla esim. nopea digitaaliventtii1 i , jolla on 1åhtoasentona * jompi kumpi kuviossa 3 esitetyistå asennoista. Jos venttiili 15 1åhtåasennossaan yhdiståå ohjauspainelinjan 11 såilioon R, on måntå 4 oikeanpuoleisessa ååriasennossaan, josta låhtien se suorittaa edestakaisen iskun, kun venttiiliå 15 kåytetåån såh-koisellå ohjauspulssi11a toisessa asennossaan. Jos venttiili 15 1åhtoasennossaan yhdiståå ohjauspaineen 16 ohjauspainelinjaan 11, on måntå 4 vasemmanpuoleisessa ååriasennossaan, josta låhtien se suorittaa edestakaisen iskun kun venttiiliå 15 kåytetåån såhkoisellå ohjauspulssi11a toisessa asennossaan.The pressure booster comprises a stepped core 1, 2, 3 made in the body 21, which within certain limits has a reciprocating piston 4. The piston 4 divides the cylinder 1 into at least three chambers 1, 2 and 3, which are delimited by at least three surfaces respectively. the chamber 1 delimited by the largest piston surface 5 has a connection to the control pressure distributor 11, which has a controllable valve 15 for switching the control pressure on and off. This may be, for example, a high-speed digital valve 1 with 1 option either of the positions shown in Figure 3. If the valve 15 in its original position connects the control pressure line 11 to the tank R, the piston 4 is in its right-hand outer position, from which it performs a reciprocating stroke when the valve 15 is actuated by the electronic control pulse11a in its second position. If the valve 15 in its open position connects the control pressure 16 to the control pressure line 11, the piston 4 is in its left outer position, from which it performs a reciprocating stroke when the valve 15 is actuated by an electronic control pulse11a in its second position.
Pinta-alaltaan toiseksi suurimman måntåpinnan 6 rajoittama kammio 2 on yhteydesså painelinjaan 12, jossa vallitseva paine sekå måntåpintojen 6 ja 7 vålinen pintala-alaero måårååvåt ulostulevan polttoaineen ruiskutuspaineen. Kun måntåpinta 8 jå-tetåån vielå tarkastelun ulkopuolelle ja tarkastel1aan vain kolmea edellå mainittua måntåpintaa 5, 6 ja 7, on pienimmån måntåpinnan 7 rajoittama kammio 3 yhteydesså yksisuuntaisten venttiilien 9 ja 10 kautta toisaalta polttoaineen syottolinjaan 13 ja toisaalta ruiskutussuuttimel1e 19 menevåån linjaan. Suu-rin ja pienin måntåpinta 5 ja 7 osoittavat samaan suuntaan ja toiseksi suurin måntåpinta 6 osoittaa vastakkaiseen suuntaan.The chamber 2, delimited by the second largest surface area of the piston surface 6, communicates with the pressure line 12, where the prevailing pressure and the surface area difference between the piston surfaces 6 and 7 determine the injection pressure of the outgoing fuel. When the piston surface 8 is still excluded and only the three aforementioned piston surfaces 5, 6 and 7 are considered, the chamber 3 delimited by the smallest piston surface 7 is connected in connection with the one-way valves 9 and 10 to the fuel supply line 13 on the one hand. The largest and smallest piston surfaces 5 and 7 point in the same direction and the second largest piston surface 6 points in the opposite direction.
Edellå mainittujen kolmen måntåpinnan lisåksi måntåå ympåroi neljås måntåpinta 8, jonka rajoittama kammio on yhteydesså ainoastaan vuotolinjaan 14, johon vuotava polttoaine voidaan palauttaa polttoainesåi1iddn R, koska kaikissa edellå maini-In addition to the above-mentioned three piston surfaces, the piston is surrounded by a fourth piston surface 8, the boundary chamber of which is connected only to the leakage line 14 to which the leaking fuel can be returned to the fuel tank R, because in all the above-mentioned
IIII
3 92242 tuissa linjoissa on samaa polttoainetta. Kun månnån 4 ja sitå ympåroivien sylinteripintojen vålillå voidaan sallia tietty vuoto, saadaan måntå riittåvån herkkåliikkeiseksi. Pinnan 8 pinta-alalla ei sinånså ole merkitystå, mutta sen suuruudella voidaan vaikuttaa pinta-alojen 5 ja 6 våliseen pinta-alaeroon.3 92242 supported lines have the same fuel. When a certain leakage can be allowed between the piston 4 and the surrounding cylinder surfaces, the piston is made sufficiently sensitive. The area of the surface 8 is not important per se, but its size can influence the area difference between the areas 5 and 6.
Silloin kun månnån 4 pinta-alat on valittu edellå selostetulla tavalla, toimii paineenkohottaja, kuten jaljempånå tarkemmin selostetaan, myos ilman kammiossa 2 olevaa jousta 16. Jousella 16 voidaan kuitenkin joko tehostaa painelinjan 12 hydraulipai-netta tai kokonaan korvata hydraulipaineen kåytto ruiskutusvoi-man låhteenå. Viimeksi mainitussa tapauksessa månnån 4 pinnan 6 pinta-alalla suhteessa muihin pinta-aloihin ei ole merkitystå. Kuitenkaan pelkåståån jousen 16 voimaan perustuvalla toimin-nalla ei saavuteta optimaalista tulosta suurilla toimintano-peuksilla ja paineen kohotusarvoi1 la, vaan tålloin tarvitaan painelinjaa 12.When the areas of the piston 4 have been selected as described above, the booster, as will be described in more detail below, also works without the spring 16 in the chamber 2. However, the spring 16 can either increase the hydraulic pressure of the pressure line 12 or completely replace the hydraulic injection. In the latter case, the area of the surface 6 of the piston 4 in relation to the other areas is irrelevant. However, operation based solely on the force of the spring 16 does not achieve an optimal result at high operating speeds and pressure boost values, but a pressure line 12 is required.
Silloin kun painelinjaa 12 kåytetåån, on edullista kåyttåå siihen liittyvåå paineakkua, jotta painelinjassa voidaan yllåpitåå vakiopaine.When the pressure line 12 is used, it is preferable to use an associated pressure accumulator in order to maintain a constant pressure in the pressure line.
Paineenkohottajan toiminta tapahtuu seuraavasti. Kun ohjauslin-ja 11 paineistetaan ohjaamalla venttiili 15 kuviossa 3 esite-tystå oikeanpuoleisesta asennosta vasemmanpuoleiseen asentoon, måntå 4 liikkuu vasemmalle, koska kammiota 1 rajoittavan måntå-pinnan 5 pinta-ala on suurempi kuin kammiota 2 rajoittavan måntåpinnan 6 pinta-ala. Vastaava tilanne saavutetaan vaihtoeh-toisessa suoritusmuodossa mitoittamalla jousen 16 voima pienem-måksi kuin se voima, jonka ohjauspaine aiheuttaa pintaan 5. Painelinjaa 12 kåytettåesså voi polttoaineen paine painelinjas-sa 12 ja ohjauslinjassa 11 olla sama. Månnån 4 liikkuessa vasemmalle se imee polttoainetta korkeapainekammioon 3 yksitie-venttiilin 9 kautta. Yksitieventtiili 10 yllåpitåå haluttua painetta ruiskutussuuttimel1e 19 menevåsså painelinjassa 20.The operation of the booster is as follows. When the guide line and 11 are pressurized by guiding the valve 15 from the right-hand position shown in Fig. 3 to the left-hand position, the piston 4 moves to the left because the area of the piston surface 5 delimiting the chamber 1 is larger than the area of the piston surface 6 delimiting the chamber 2. A similar situation is achieved in an alternative embodiment by dimensioning the force of the spring 16 to be less than the force exerted by the guide pressure on the surface 5. When operating the pressure line 12, the fuel pressure in the pressure line 12 and the guide line 11 may be the same. As the piston 4 moves to the left, it sucks fuel into the high-pressure chamber 3 via a one-way valve 9. The one-way valve 10 maintains the desired pressure in the pressure line 20 to the spray nozzle 19.
4 922424,9242
Kun paine poistetaan ohjauslinjasta 11 ohjaamalla venttiili 15 kuvion 3 esittåmåån vasemmanpuoleiseen asentoon, måntå 4 liik-kuu oikealle, koska måntåpinta 6 on suurempi kuin korkeapaine-kammiossa 3 oleva måntåpinta 7. Yksitieventtii1 i 9 sulkeutuu ja polttoaine virtaa yksitieventtii1 in 10 kautta polttoaineen ruiskutussuuttimel1e 19.When the pressure is released from the control line 11 by guiding the valve 15 to the left position shown in Fig. 3, the piston 4 moves to the right because the piston surface 6 is larger than the piston surface 7 in the high pressure chamber 3. The one-way valve 9 closes and the fuel
Kuten jo aiemmin esitettiin, voi venttiilin 15 ja månnån 4 låh-toasema ja liikesuunta olla påinvastainen. Kun måntåpintaan 5 vaikuttava ohjauspaine hetkel1isesti poistuu, suorittaa måntå 4 pumppausiskun vasemmalta oikealle ja palaa takaisin vasempaan ååriasentoonsa kun ohjauspaine palaa kammioon 1.As previously stated, the proximal position and direction of movement of the valve 15 and the piston 4 may be reversed. When the control pressure acting on the piston surface 5 is temporarily released, the piston 4 performs a pumping stroke from left to right and returns to its left outer position when the control pressure returns to the chamber 1.
Månnån 4 iskunpituus mååråå kullakin ruiskutuskerral1a ruisku-tettavan polttoaineen måårån, jota siis voidaan muuttaa muut-tamalla månnån 4 iskunpituutta.The stroke length of the piston 4 determines the amount of fuel to be injected with each injection, which can thus be changed by changing the stroke length of the piston 4.
Viitenumerolla 17 on merkitty polttoainepumppua ja numerolla 18 on merkitty polttoainesuodatinta. Pumppu 17 on piirretty erik-seen kuhunkin johtimeen 11, 12, 13, vaikka kåytånnosså johdot 11, 12, 13 voidaan haarauttaa samalta pumpulta 17, koska kai-kissa johdoissa voi vallita sama paine.Reference numeral 17 denotes a fuel pump and numeral 18 denotes a fuel filter. The pump 17 is drawn in a separate line for each line 11, 12, 13, although in practice the lines 11, 12, 13 can be branched from the same pump 17, since the same pressure can prevail in all lines.
IIII
Claims (4)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI912170A FI92242C (en) | 1991-05-06 | 1991-05-06 | Pressure booster to supply diesel fuel to the injector |
AU16513/92A AU1651392A (en) | 1991-05-06 | 1992-04-30 | Pressure booster for delivering diesel fuel to an injection nozzle |
PCT/FI1992/000136 WO1992019860A1 (en) | 1991-05-06 | 1992-04-30 | Pressure booster for delivering diesel fuel to an injection nozzle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI912170A FI92242C (en) | 1991-05-06 | 1991-05-06 | Pressure booster to supply diesel fuel to the injector |
FI912170 | 1991-05-06 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI912170A0 FI912170A0 (en) | 1991-05-06 |
FI912170A FI912170A (en) | 1992-11-07 |
FI92242B FI92242B (en) | 1994-06-30 |
FI92242C true FI92242C (en) | 1994-10-10 |
Family
ID=8532446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI912170A FI92242C (en) | 1991-05-06 | 1991-05-06 | Pressure booster to supply diesel fuel to the injector |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU1651392A (en) |
FI (1) | FI92242C (en) |
WO (1) | WO1992019860A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9312288D0 (en) * | 1993-06-15 | 1993-07-28 | Perkins Ltd | Fuel injection apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1522293A (en) * | 1967-02-22 | 1968-04-26 | Fuel injection device for internal combustion engines | |
JPS53109021A (en) * | 1977-03-07 | 1978-09-22 | Nippon Denso Co Ltd | Fuel injection device for internal combustion engine |
JPS5726261A (en) * | 1980-07-24 | 1982-02-12 | Diesel Kiki Co Ltd | Fuel injector of internal combustion engine |
DE4015557A1 (en) * | 1989-05-26 | 1990-11-29 | Volkswagen Ag | Fuel injection system for IC engine - has high pressure chamber connected permanently with pressure operated injection valve which is defined by piston surface |
-
1991
- 1991-05-06 FI FI912170A patent/FI92242C/en not_active IP Right Cessation
-
1992
- 1992-04-30 AU AU16513/92A patent/AU1651392A/en not_active Abandoned
- 1992-04-30 WO PCT/FI1992/000136 patent/WO1992019860A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
FI912170A0 (en) | 1991-05-06 |
WO1992019860A1 (en) | 1992-11-12 |
FI92242B (en) | 1994-06-30 |
FI912170A (en) | 1992-11-07 |
AU1651392A (en) | 1992-12-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG | Patent granted |
Owner name: SAMPOWER OY |
|
BB | Publication of examined application | ||
MM | Patent lapsed |