WO1998059165A1 - Elements, enveloppes, coques, panneaux et canaux permettant de recouvrir des cables, en particulier pour des appareils electriques et/ou electroniques situes sur un plan de travail - Google Patents

Elements, enveloppes, coques, panneaux et canaux permettant de recouvrir des cables, en particulier pour des appareils electriques et/ou electroniques situes sur un plan de travail Download PDF

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Publication number
WO1998059165A1
WO1998059165A1 PCT/IT1998/000170 IT9800170W WO9859165A1 WO 1998059165 A1 WO1998059165 A1 WO 1998059165A1 IT 9800170 W IT9800170 W IT 9800170W WO 9859165 A1 WO9859165 A1 WO 9859165A1
Authority
WO
WIPO (PCT)
Prior art keywords
conduit
annular
feeding
frusto
conical
Prior art date
Application number
PCT/IT1998/000170
Other languages
English (en)
Inventor
Aquilino Zilocchi
Original Assignee
Aquilino Zilocchi
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 Aquilino Zilocchi filed Critical Aquilino Zilocchi
Priority to AU79316/98A priority Critical patent/AU7931698A/en
Publication of WO1998059165A1 publication Critical patent/WO1998059165A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/04—Gas-air mixing apparatus
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the present invention relates to an improvement in diffuser- mixer devices for methane gas and/or LPG feeding systems for internal- combustion engines, particularly for motor vehicles.
  • transformations allow the alternative use of the gas and gasoline feeding.
  • said transformations involve a reduction of the engine efficiency both in the gas feeding mode and in the gasoline feeding mode.
  • said transformations involve, in case of gasoline feeding a high level of highly polluting combustion products.
  • Drawbacks of the known devices are due to the fact that the devices for the transformation from gasoline feeding to alternative gas feeding are comprised of a simple nozzle injecting fuel in any point of the feeding conduit provided between the air filter and the carburetor or injector, or into an annular chamber provided between the carburetor and the intake manifold.
  • the alternative feeding of the gaseous fuel and of the liquid fuel, particularly gasoline can be controlled by valves alternatively opening and closing the connection to the gas tank and to the gasoline tank.
  • a further drawback of the known devices consists in the fact that, since any kind of employed gaseous fuel requires different gas-air mixing ratios and the intake conduit are differently sized for any engine according to the features of the same, it is necessary to realise any transformation in a different way and with gas annular chambers or injection conduits having different structural and dimensional features.
  • the above requires to the installers remarkable storage stocks to be able to face any kind of transformation.
  • this kind of devices and the corresponding settings are standardised for any kind of engine and of the relevant feeding circuit.
  • the object of the invention is that of realising a device of the above mentioned kind in such a way that on one hand it is possible to improve the mixing between gas and air without reducing the engine performance also for the alternative use of the gasoline feeding, and on the other hand it is possible to reduce the different kind of devices necessary to perform the transformation of the different engines and feedings, as well as making specific settings of the gas - air mixing ratio, the above thanks to solutions quite simple and cheap.
  • connection and suction means for the gaseous fuel toward and within the feeding conduit of the engine are made up of a coaxial annular chamber on the port of the air and/or air-gasoline mixture feeding conduit providing a radially inner diameter substantially corresponding to the diameter of the engine feeding conduit and with the radially inner side in communication with said feeding conduit by a frusto-conical annular conduit, and with the radially outer side in communication with a radially outer conduit for the inlet of the gaseous fuel, as well as a further radial conduit exiting into a coaxial biconical central bushing supported by said radial conduit.
  • the radial conduit is provided in an angular position offset with respect to the fuel feeding conduit to the annular chamber, while it is inclined in the flow direction toward the engine.
  • the frusto-conical annular conduit is inclined in the same direction.
  • the central bushing has a central section similar to a Venturi tube.
  • said conduits and the annular chamber are realised as a sleeve element which can be introduced within the feeding conduit, the two segment of which joint at the head ends opposed of a cylindrical opening having an inner diameter substantially corresponding to the one of the feeding conduit.
  • the annular chamber is comprised of a tubular body providing a bigger diameter on the air or air-gasoline mixture entrance side (during the alternative use of the gasoline feeding mode and for engines providing a carburetor) with respect to the annular chamber realised within an annular projection, while downward the annular chamber, making reference to said flow direction, an annular reduction is provided, having a conical wall inclined according to the flow direction from the bigger diameter to the lower diameter, substantially corresponding to the one of the engine feeding conduit.
  • a radial conduit joints with said tubular cylindrical element, while a second tubular element can be introduced from the bigger diameter inlet side, said further cylindrical element providing a head side having a conically tapered outer wall and being provided with the inclined radial conduit bridging with the central bushing, the first and the second cylindrical elements being removably engageable each other, eventually by the provision of further sealing elements.
  • the two cylindrical elements can be progressively moved between two end positions, respectively of maximum approaching and minimum distance, so that it is possible to vary the port of the frusto-conical annular conduit.
  • one of the two elements has a radial pin, and the other one has a helicoidal groove or slot.
  • the rotation of the same is also due to the sliding of the element with respect to the other.
  • the radial conduit ending in the central bushing and providing one the delimitation conical surfaces of the frusto-conical annular conduit by which the annular chamber connects with the feeding conduit is comprised of an annular element which is tightened in an axial position corresponding to the annular chamber between an inner annular shoulder and a terminal annular element realising the pipe union on the air inlet side of the device.
  • the cylindrical element provides a cylindrical widening extending from the inlet head side between the zone where the peripheral annular chamber is provided, ending with a stepped annular reduction of a first cylindrical annular element, having a thickness substantially corresponding to that of the stepped widening and the head side of which faced toward the air inlet side provides a wall conically tapered on the head edge inner side, so as to realise one of the walls of the frusto-conical annular conduit with which the annular chamber communicates with the inner part of the feeding conduit.
  • the cylindrical annular element ends at a certain distance from the conical surface of the tapered outer head side in a way complementary with respect to an intermediate ring supporting the radial conduit and the central bushing, while this intermediate ring is tightened between a radial annular shoulder and a further ring nut or fixing ring on the entrance side of the cylindrical element, the first annular element being movable at least in an axial direction for approaching and moving away from the conical surface of the head side of the intermediate ring.
  • a further modification instead of the axially movable annular element, provides that the same annular element is fixed while between the radial inner annular shoulder of the intermediate ring and said intermediate ring interchangeable spacing elements and different shims are provided , so that in this case too the frusto-conical surfaces faced each other can have different distances, making the port of the frusto- conical conduit adjustable.
  • the fact that it is possible to vary the port of the frusto-conical conduit allows to adjust easily and with the maximum precision, and in a continuous way the gas-air mixing ratio. Furthermore, the easy of adjustment allows to reduce the storage stocks for the parts realised only to be used for a specific vehicle and makes easier the adjustment steps.
  • Figure 1 shows an axial section of a first embodiment of the device according to the invention which allows an adjustment of the mixing ratio between gaseous fuel and air.
  • Figure 2 shows an axial section similar to figure 1 , wherein the adjustment of the mixing ratio can be set according to the needing before and/or after the mounting of the device within the feeding conduit of the engine.
  • the diffuser-mixer is comprised of a body 1, preferably made up of metallic material, having an outer cylindrical shape, with a peripheral annular widening 2 in the median section.
  • a nozzle 3 is coupled to the body for feeding the gas from a plenum chamber - pressure reducer element (not shown).
  • gas is shown by a full line arrow 4, while air is indicated by an empty line 5.
  • annular chamber 6 is present, said chamber being obtained into the annular widening 2 and being opened inwardly.
  • Annular chamber 6 extends about the inner cylindrical space of the body 1, and communicates with the inside of the gas 4 feeding nozzle 3 by the through hole 7.
  • a cylindrical portion 101 having a diameter bigger than the outlet portion 303, having in the first part a cylindrical shape and in the end part a divergent conical shape, making reference to the flow direction (arrow 5).
  • annular element 1 abuts by an outer peripheral flange 108 against an inner annular shoulder 9 in such a way that the outer surface of the head side faced toward the flow direction and conically tapered 10 creates an annular passage slot 11 partially closing the radially inner side of the annular chamber 6.
  • Slot 11 creates an annular frusto-conical conduit delimited on one side by a conical flaring 106 of the side wall of the annular chamber 6 faced toward the conical surface 10 of the annular element 8.
  • the annular element 8 is connected by an arm 12 to a bushing or a hollow cable 13 having an inner converging/diverging shape, like a Venturi tube.
  • An axial hole 14 obtained within the arm 12 communicates on one side with the conduit 6 and on the other side with the central hole 15 of the cylinder 13.
  • the annular element 8 is maintained within its seat by a stop elastic ring 33 inserted within a groove 18 obtained into the body 1.
  • the end portion 101 of the body 1 on the air 5 inlet side can be realised as a pipe union removably fixable to the body 1 and that can be tightened against the annular element 8.
  • FIGS 1 and 2 two executive modifications of the diffuser/mixer according to the invention are shown, by which it is possible to adjust in a precise way the mixing ratio between gaseous fuel and air, either in a estabilised way to adapt to the engine and feeding system kind to which the diffuser/mixer must be mounted and with reference to an adjustment during the operation with a fine calibration.
  • the possibility of adjusting the diffuser/mixer device and to adapt the same to the different operative conditions, practically without requiring the replacement with different sizing for each kind of engine is a remarkable advantage both for the convenience and the ease of carrying out the replacement of the feeding system and for the transformation costs.
  • the installer must not have in the storehouse a large number of pieces different each other to satisfy the different requests.
  • the invention reaches these advantages thanks to the fact that by simple and cheap solutions, the above structure of the diffuser/mixer allow the variation of the passage port of the annular frusto-conical conduit 11 by which the peripheral annular chamber 6 communicates with the cylinder 1 and thus with the engine intake conduit.
  • the variation of said port 11 allows to remarkably modify the mixing ratio between gas and air, fitting the ratio to the sizes of the feeding conduits and to the performances of the same engine.
  • Variation of port passage of the frusto-conical conduit at the outlet of the body 303 can be stepless or stepwise and can be operated either when the device is mounted and during the device assembly step.
  • cylindrical body 1 provides in the zone between the annular chamber and an intermediate point toward the outlet end with respect to the air flow direction, a cylindrical widening 201 which makes the housing seat of a sleeve 30 having thickness corresponding to the dimensions of the radial widening 201.
  • Sleeve 30 abuts against the side faced toward the outlet side of the feeding air - gas mixture from the body 1 against the head radial wall of the widening 201 , while on the side faced toward the annular chamber 6 it realises the wall 106 delimiting the annular frusto-conical conduit 11.
  • Sleeve 3 is supported, at least sealing axially movable within a determined range, between a maximum approaching to the frusto-conical wall 10 or the ring 8 position and a position far away from the same, in such a way to allow a stepless adjustment of the annular frusto-conical conduit 11.
  • Sealing can be warranted by one or more O-ring 31 placed between the body 1 and the sleeve 30, within suitable seats. At least an axial sliding occurs. Preferably, the relative sliding is obtained thanks to a combined rotation and axial translation motion. This is due to the fact that the sleeve 30 has at least a radial pin 32 and that the body 1 has at least a helicoidal groove or slot 301 , wherein the pin engages, or viceversa. As in the preceding embodiment, ring 8 is fixed.
  • control means for the inventive device to control the motion between the sleeve 30 and the body 1 , in such a way to obtain an adjustment during the operation of the device.
  • the same result can be obtained simply providing a spacer, or a series of spacers or a fifth wheel 33 having a thickness calibrated, between the two abutment surfaces 108 of the ring 8 and 9 of the body 1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne des éléments, des enveloppes, des coques, des panneaux et des canaux permettant de recouvrir des câbles, en particulier pour des appareils électriques et/ou électroniques situés sur un plan de travail et analogue ou sur un plancher, caractérisés en ce qu'ils comprennent au moins un élément de couverture destiné à recouvrir et/ou contenir des composants fonctionnels et le panneau de connexion des câbles à l'appareil.
PCT/IT1998/000170 1997-06-23 1998-06-22 Elements, enveloppes, coques, panneaux et canaux permettant de recouvrir des cables, en particulier pour des appareils electriques et/ou electroniques situes sur un plan de travail WO1998059165A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU79316/98A AU7931698A (en) 1997-06-23 1998-06-22 Improvement in diffuser-mixer devices for gas feeding systems, particularly for motor vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO97A000384 1997-06-23
IT97BO000384A IT1292637B1 (it) 1997-06-23 1997-06-23 Perfezionamento nei dispositivi diffusori-miscelatori per impianti di alimentazione a gas specialmente per autoveicoli.

Publications (1)

Publication Number Publication Date
WO1998059165A1 true WO1998059165A1 (fr) 1998-12-30

Family

ID=11342359

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1998/000170 WO1998059165A1 (fr) 1997-06-23 1998-06-22 Elements, enveloppes, coques, panneaux et canaux permettant de recouvrir des cables, en particulier pour des appareils electriques et/ou electroniques situes sur un plan de travail

Country Status (4)

Country Link
AR (1) AR013120A1 (fr)
AU (1) AU7931698A (fr)
IT (1) IT1292637B1 (fr)
WO (1) WO1998059165A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007001227A1 (fr) * 2005-06-27 2007-01-04 Ottonova Ab Moteur à combustion
WO2012156077A1 (fr) * 2011-05-19 2012-11-22 Mtu Friedrichshafen Gmbh Mélangeur de gaz, système de mélange de gaz et moteur à gaz
US9702327B2 (en) 2015-02-05 2017-07-11 Caterpillar Inc. System and method for introducing gas into engine cylinder
EP3508788A1 (fr) * 2018-01-09 2019-07-10 Orkli, S. Coop. Dispositif mélangeur pour brûleur à gaz

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR52511E (fr) * 1941-04-16 1945-04-17 Dispositifs et appareils pour alimenter normalement les moteurs à explosion avec des combustibles pauvres en calories ou de combustion difficile et activés par ceux àhaut pouvoir calorique
US4280968A (en) * 1979-12-31 1981-07-28 Smeets Andreas L M T Gas carburettor to be mounted on a petrol carburettor of a combustion engine
US4991561A (en) * 1990-02-02 1991-02-12 N I S Pri Vtu "Angel Kantschev" Gas-air mixer
JPH03149342A (ja) * 1989-11-02 1991-06-25 Yanmar Diesel Engine Co Ltd ガスエンジンのミキサ
WO1991014086A1 (fr) * 1990-03-16 1991-09-19 Alex Jensen A/S, Skibby Moteur a combustion a piston
US5083547A (en) * 1991-05-17 1992-01-28 Davis Family Trust Air and fuel mixing apparatus
US5103795A (en) * 1991-05-17 1992-04-14 Davis Family Trust Air and fuel mixing apparatus and method
WO1994001672A1 (fr) * 1992-07-01 1994-01-20 Vladimir Stepanovich Smolin Dispositif de preparation d'un melange carburant-air pour moteur a combustion interne
GB2284016A (en) * 1993-11-19 1995-05-24 British Gas Plc I.c. engine gas carburettor
US5527367A (en) * 1993-12-03 1996-06-18 Nippon Carbureter Co., Ltd. Mixer for a gas-fueled engine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR52511E (fr) * 1941-04-16 1945-04-17 Dispositifs et appareils pour alimenter normalement les moteurs à explosion avec des combustibles pauvres en calories ou de combustion difficile et activés par ceux àhaut pouvoir calorique
US4280968A (en) * 1979-12-31 1981-07-28 Smeets Andreas L M T Gas carburettor to be mounted on a petrol carburettor of a combustion engine
JPH03149342A (ja) * 1989-11-02 1991-06-25 Yanmar Diesel Engine Co Ltd ガスエンジンのミキサ
US4991561A (en) * 1990-02-02 1991-02-12 N I S Pri Vtu "Angel Kantschev" Gas-air mixer
WO1991014086A1 (fr) * 1990-03-16 1991-09-19 Alex Jensen A/S, Skibby Moteur a combustion a piston
US5083547A (en) * 1991-05-17 1992-01-28 Davis Family Trust Air and fuel mixing apparatus
US5103795A (en) * 1991-05-17 1992-04-14 Davis Family Trust Air and fuel mixing apparatus and method
WO1994001672A1 (fr) * 1992-07-01 1994-01-20 Vladimir Stepanovich Smolin Dispositif de preparation d'un melange carburant-air pour moteur a combustion interne
GB2284016A (en) * 1993-11-19 1995-05-24 British Gas Plc I.c. engine gas carburettor
US5527367A (en) * 1993-12-03 1996-06-18 Nippon Carbureter Co., Ltd. Mixer for a gas-fueled engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 374 (M - 1160) 20 September 1991 (1991-09-20) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007001227A1 (fr) * 2005-06-27 2007-01-04 Ottonova Ab Moteur à combustion
WO2012156077A1 (fr) * 2011-05-19 2012-11-22 Mtu Friedrichshafen Gmbh Mélangeur de gaz, système de mélange de gaz et moteur à gaz
CN103917767A (zh) * 2011-05-19 2014-07-09 Mtu腓特烈港有限责任公司 气体混合器、气体混合系统、气体发动机
US8939129B2 (en) 2011-05-19 2015-01-27 Mtu Friedrichshafen Gmbh Gas mixer, gas mixing system, gas engine
US9702327B2 (en) 2015-02-05 2017-07-11 Caterpillar Inc. System and method for introducing gas into engine cylinder
EP3508788A1 (fr) * 2018-01-09 2019-07-10 Orkli, S. Coop. Dispositif mélangeur pour brûleur à gaz
WO2019138146A1 (fr) * 2018-01-09 2019-07-18 Orkli, S.Coop. Dispositif mélangeur pour un brûleur à gaz

Also Published As

Publication number Publication date
IT1292637B1 (it) 1999-02-08
AR013120A1 (es) 2000-12-13
AU7931698A (en) 1999-01-04
ITBO970384A1 (it) 1998-12-23
ITBO970384A0 (it) 1997-06-23

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