GB2135729A - Regulating liquefied petroleum gas supply to an engine - Google Patents
Regulating liquefied petroleum gas supply to an engine Download PDFInfo
- Publication number
- GB2135729A GB2135729A GB08305257A GB8305257A GB2135729A GB 2135729 A GB2135729 A GB 2135729A GB 08305257 A GB08305257 A GB 08305257A GB 8305257 A GB8305257 A GB 8305257A GB 2135729 A GB2135729 A GB 2135729A
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- GB
- United Kingdom
- Prior art keywords
- fuel
- regulating
- liquid phase
- valve means
- ofthe
- 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.)
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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
- 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
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0239—Pressure or flow regulators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
-
- 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
-
- 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
- F02M21/06—Apparatus for de-liquefying, e.g. by heating
-
- 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
Landscapes
- 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)
Abstract
A chamber 16 having an inlet 20 for LPG from a storage vessel and an outlet 21 to a vaporiser contains a wax thermostat 26 and a pressure responsive device 32 including a bellows (34, fig. 7) which control respective valves in openings 42, 44 between an inlet 40 from the vaporiser and a chamber 18 having an outlet 48 to a carburettor. The flow of vapour is thus controlled in dependence on the temperature and vapour pressure of the liquid fuel. A valve 47 provides for a calibration of vapour flow to the chamber 18. <IMAGE>
Description
SPECIFICATION Apparatus for regulating the fuel supply to a liquefied petroleum gas engine
This invention relates generally to apparatus for regulating the supply offuel to liquefied petroleum gas (LPG) engines and more particularly to apparatus for automatically regulating the supply of fuel to a carburettorofan engine in accordancewiththe composition ofthe LPG and the temperature of air to be mixed with the fuel.
Liquefied petroleum gas, which may be prepared by compressing propane, butane ora mixture thereof, is generally used as fuel for internal combustion engines. The relation between atmospherictemperature and the vapour pressure ofthe LPG fuel is kept constant in accordance with the composition of the fuel orthe proportion ofpropaneand butane.
It is preferable to control a mixture ratio offuel gas and air to be supplied to the internal combustion engine to a theoretical mixture ratio, that is, an excess air ratio of 1 when the fuel is supplied to the engine.
Since, however, a change in the composition ratio of the fuel gas affects the specific gravityof the fuel, it is necessary to adjust the mixture ratio depending upon the composition of the fuel.
To this end, Japanese Utility Model Application No.
116,533 of 1973 (Provisional Utility Model Publication No.60424 of 1975) discloses an apparatus for regulating the fuel supply to a LPG engine in which the temperature and the vapour pressure of the LPG to be supplied to the engine are detected and analyzed to confirm the composition ofthe fuel, and electric signals which correspond to the composition of the fuel confirmed are used for adjusting the fuel flowto the engine. There are, however, disadvantages in that the above prior art apparatus requires the provision of electrical operation units for detecting and analyzing the composition of the LPG, and the apparatus is thus complicated in construction and is extremely expensiveto manufacture.
Furthermore, Japanese PatentApplication No.
112,407 of 1973 (Provisional Patent Publication No.
63323 of 1975) teaches an apparatus for controlling the fuel supply of a liquefied petroleum gas to an internal combustion engine in which an amount of fuel to be supplied to the engine is adjusted mechanically by making use ofthe change in vapour pressure ofthefuel depending on the composition ofthefuel. In this prior application, however, the ratio of the mixture ofthe fuel and air only is controlled with respect to the change in composition of the fuel, but no consideration is taken ofthe change of the ratio ofthe mixture with respect to any change oftemperature of the air being sucked into the engine, that is, the change ofthe ratio ofthe mixture ofthefuel and air with respect to the change of the specific gravity of air.
In view ofthe above, it is a principal object of the present invention to provide an apparatus for regulating the amount of a gaseous fuel to be supplied to a liquefied petroleum gas engine in accordance with the composition ofthefuel.
It is another object of the present invention to
provide an apparatus for regulating the fuel supplyto an LPG engine by sensing and detecting the tempera ture and pressure of a gaseous fuel being supplied to the engine.
It is still another object of the present invention to provide apparatus as above mentioned which is simple in construction, reliable in use and low in cost.
The present invention provides apparatus for reg ulating the fuel supply to a liquefied petroleum gas engine, which apparatus is adapted to be disposed in a fuel supply system including a supply of liquefied petroleum gas fuel in the liquid phase, a vapourizerfor converting fuel in the liquid phase into fuel in the gas phase and regulating its pressure, and a carburettor for mixing fuel in the gas phase with air and supplying the mixture to the engine, the improvement comprising:
(A) a firstvalve means for regulating the flow of fuel supplied from said vaporizer to said carburettor in response to thetemperature of fuel in the liquid phase being fed from said fuel supply to said vaporizer; and (B) a second valve means for regulating the flow of fuel supplied from said vaporizer to said carburettor in response to the vapour pressure of fuel in the liquid phase being fed from said fuel supplyto said vaporizer.
The present invention also providesapparatusfor regulatingthefuelsupplytoa liquefied petroleum gas engine comprising
a housing;
a partition wall dividing said housing into a lower chamber providing passageforfuel in the liquid phase from a fuel supply to a vaporizer and an upper chamber providing passageforfuel in the gas phase from said vaporizer to a carburettor;
a passageforfuel inthegas phase provided in said partition wall and communicating with said vaporizer;
a first opening and a second opening communicating said passage in said partition wall with said upper chamber;
a means for sensing the temperature offuel in the liquid phase passing through said lower chamber;
a means for sensing the vapour pressure of fuel in the liquid phase passing through said lower chamber;;
a firstvalve means for regulating the flow of fuel in the gas phase th rough said first opening in cooperation with said temperature sensing means; and
a second valve means for regulating the flow of fuel in the gas phase through said second opening in cooperation with said pressure sensing means.
The present invention will be more particularly described with reference to the accompanying drawings, in which: Figure lisa schematic diagram showing a system for supplying LPG fuel to an internal combustion engine;
Figure 2 is a graph showing the relation between temperature and vapour pressure of compositions of
LPG in the liquid phase;
Figure 3 is a graph showing the relation between temperature and excess air ratio of LPG in the liquid phase; Figure4 is a graph showing the relation between vapour pressure and air excess ratio of LPG in the liquid phase;
Figure 5 is a schematic diagram showing a system
for supplying LPG fuel to an internal combustion enginewhicin incorporates apparatus for regulating
the fuel supply to the LPG engine according to the
present invention;;
Figure 6 is a cross-sectional view of one embodi
ment of apparatus according to the present invention, the view being taken on line Vl-Vl of Figure 7; and
Figure 7 is a sectional viewtaken on lines Vll-Vll of
Figure 6.
In general, as shown in Figure 1,thefuel supply system for supplying LPG fuel to an internal combustion engine consists of a vessel B in which liquefied
LPG fuel is bottled, a filter F, a solenoid valve E, a vaporizerVanda carburettor C.
In such a system, when the temperature of the liquefied fuel from the vessel to the vaporizer is represented byT,thetemperatureTa of air being taken intotheengineisshownasfollows:
Ta = T + D (Disconstant) and the temperature Tf ofthe fuel in gas phase from the outlet ofthe vaporizer may be determined experimentally as follows:
Tf = T + E (E is constant)
In Figure 2, curve A represents a fuel consisting of 100% propane and 0% butane, curve B represents a fuel consisting of 50% propane and 50% butane and curve C represents a fuel consisting 100% butane and 0% propane. As shown in Figure 2,the relation between the gaseoustemperature and the vapour pressure with respect to the composition of LPG fuel to be used for internal combustion engines is maintained constant.
Figure 3 is a graph showing the relation between the temperature and the excess air ratio of each ofthe abovefuelcompositionsA, B, and C,from which itwill
be understood that the fuel flowto be supplied to the
engine must be reduced in orderto attain the excess air ratio = 1 whenthetemperatureofthefuel is raised.
Referring to Figure 4, there is shown a graph which represents the relation between the excess air ratio and the vapour pressure of compositions of LPG fuel, in which the letter "p" atthe upper end of each curve represents a fuel consisting of 100% propane and 0% butane, and the letter "b" at the lower end of each curve represents a fuel consisting of 0% propane and 100% butane. According to the graph of Figure 4, it will be understood that when the pressure of an LPG fuel in the gas phase is raised, the excess air ratio is increased and that the relation between the two depends on the temperature ofthe LPG fuel.
Accordingly, the present invention provides apparatusfor regulating the supply of LPG fuel to an internal combustion engine and which apparatus may be arranged in a system as shown in Figure 5. According to the present invention LPG fuel inthe liquid phase passing from a vessel B to a vaporizer may be measured in temperature and pressure by means of an apparatus 10 and then the PLG fuel flow in the gas phase from the vaporizer V to a carburettor C may be adjusted according to the measurements of the temperature and pressure of the LPG fuel inthe liquid phasethrnugh the apparatus 10.
The apparatus 10, as shown in Figures 6 and 7, comprises a casing or housing 12 which is divided into
a lower chamber 16 and an upper chamber 18 by
means of a partition wall 14. The lower chamber 16 is
provided with an inlet 20 and an outlet 21 for LPG fuel
in the liquid phase. The inlet 20 is connected by a
conduit 22 to a solenoid valve E (Figure 5) and the
outlet 21 is connected by another conduit 23 to a vaporizerV in which theLPG fuel in the liquid phase is converted into LPG fuel inthe gas phase.
Atemperaturasensor 24 is provided in the lower chamber 16 andfixed tothe partit on wall 14. The temperature sensor 24 consists ofa casing containing wax 26 which will expand orcontractin response to the temperature ofthe LPG fuel in the liquid phase and a diaphragm 28 adapted to be moved - bathe action of the wax 26. In order to sense completely the temperature of the LPG fuel passing through the lower chamber 16, a portion ofthe casing containrng wax 26 ofthe temperature sensor 24 is arranged to be immersed in the fuel in the lower chamber 16.The sensor may be constructed to actuate a firstvalve means 30to reduce the fuel flow in the gas phase from the vaporizerVto a carburettor C of the engine through the upper chamber 18 in inverse proportion to an increase in the temperature in the LPG fuel in the liquid phase passing through the lowerchamber 16.
Further in the lower chamber 16, a sensor means 32 is provided for measuring the pressure ofthe LPG fuel in the liquid phase passing through the chamber 16.
The pressure sensor32 includes a bellows 34which is capable of responding to an evaporating pressure of the LPG fuel in the liquid phase passing through the lower chamber 16 and of actuating a second valve means 66to increase the supply ofthe LPG fuel in the gas phase from the vaporizerto the carburettor ofthe enginethrough the upper chamber 18 in proportion to the increase in the pressure ofthe LPG fuel in the liquid phasepassingthroughthe lower cham ber 16.
Aswill be understood fromthe above,the LPG fuel in the vessel B is fed through the conduit 22 from the solenoid valve Eto the lower chamber 16 of the apparatus 10andthetemperatureofthe LPGfuel in the liquid phase is sensed bythe temperature sensor 24 and the pressure ofthe LPG fuel in the liquid phase is sensed by means ofthe pressure sensor 32 and then the fuel is fed to the vaporizer in which the LPG fuel in the liquid phase is gasified and regulated in pressure. The LPG fuel in the gas phase is fed to the upper chamber 18through a passage 40 formed in the partition wall 14.
The passage 40 communicates with the upper chamber 18 byway ofthreeopenings42,44 and 46.
The first opening 42 is controlled by the first valve means 30,the second opening 4 is controlled by the second valve means 66, and thethird opening 46 is provided with a needle valve means 47 which may be actuated manually from the outside ofthe apparatus lOso asto adjustthefuelflowto the engine in accordance with the capacity thereof.
An outlet48 is provided atthe upper portion ofthe upper chamber 18, which is connected to the carburettorCoftheLPG enginethrough a conduit49.
Thefirstvalve means 30 has a valve member 50 which operates in response to the action of the diaphragm 28 in accordance with the expansion or
contraction ofthewax 26 in the casing ofthe temperature sensor 24so as to control the flow of LPG fuel in the gas phase through the first opening 42. In order to actuate the valve member 50 precisely, a suitable means such as, for example, an adjusting
means 56 including a spring 54 may be arranged between a support member 52 which is provided in the upper chamber 18 and the valve member 50.
The second valve means 66 is actuated by means of a mechanism including a rod member 60 which is operated bythe action ofthe bellows 34 and an arm member 64 pivoted by a pin 62 to the support member 52 provided in the upper chamber 18. The valve means 66 is attached to the free end of the arm member 64 and is operated in response to the pressure of the LPG fuel in the liquid phase to decrease the LPG fuel in the vapour phase passing through the opening 44 in the passage 40 when the pressureinthefuel is increased.
In orderto actuate the valve means 66 precisely in response to the operation ofthe bellows 34, it is preferable to provide an adjusting means 68 for setting the position ofthe arm member 64 and a spring 70.
Means for mounting the first valve means 30, the second valve means 36 and the adjusting means 68 mentioned above may be designed suitably by those skilled in the art.
The needle valve means 47 for adjusting thefuel flow passing through the third opening 46 in the passage 40 may be adjusted or regulated depending upon the capacity ofthe LPG engine to be used.
As will be understood from the above, according to the present invention, LPG fuel in the liquid phase the vessel B passing through the filter F and the solenoid valve E to the lower chamber 16 ofthe apparatus 10 will be measured in temperature and pressure. If the temperature ofthe LPG fuel in the liquid phase passing through the lower chamber 16 is raised, the valve member 50 of the first valve means 30 is operated to reduce the flow ofthe LPG fuel in the gas phase passingthroughthe opening 42 from the passage 40 to the upper chamber 18, and if the pressure of the LPG fuel in the liquid phase passing through the lower chamber 16 is increased, the second valve means 66 is actuated to increase the flow of LPG fuel in the gas phase passing through the opening 44 from the passage 40 accordingly. Thus the
LPG fuel which is converted into the fuel in the gas phase in the vaporizer V can flowfrom the passage 40 in the partition wall 14through the first opening 42, the second opening 44 andiorthethird opening 46 to the upper chamber 18. The total amount ofthe fuel flow to theupperchamber18andthustothecarburettorCof the LPG engine is regulated in accordance with the temperature and pressure ofthe LPG fuel in the liquid phase, that is, the composition of the LPG gas fuel. The apparatus is,therefore, capable of adjusting thefuel flow into the carburettor C ofthe engine so asto attain a desired excess air ratio of 1.
Claims (12)
1. Apparatus for regulating the fuel supplyto a liquefied petroleum gas engine, which apparatus is adapted to be disposed in a fuel supply system including a supply of liquefied petroleum gas fuel in the liquid phase, a vaporizer for converting fuel in the liquid phase into fuel in the gas phase and regulating its pressure, and a carburettorfor mixing fuel in the gas phase with air and supplying the mixtureto the engine, the improvement comprising:
(A) a first valve means for regulating the flow of fuel supplied from said vaporizerto said carburettor in response to the temperature of fuel in the liquid phase fed from said fuel supply to said vaporizer; and
(B) a second valve means for regulating the flow of fuel supplied from said vaporizerto said carburettor in response to the vapour pressure of fuel in the liquid phase being fed from said fuel supplyto said vaporizer.
2. Apparatus for regulating the fuel supplyto a liquefied petroleum gas engine according to claim 1, wherein said first valve means is arranged so asto regulate the flow of the fuel in the gas phase in inverse proportion to the temperature ofthe fuel in the liquid phase.
3. Apparatus according to claim 1 or2,wherein said second valve means is arranged so as to regulate the flow of the fuel in the gas phase in proportion to the vapour pressure of the fuel in the liquid phase.
4. Apparatus according to claim 1,2 or3,wherein saidfirstvalve means is actuated by means ofthe expansion or contraction of wax in a temperature sensing means.
5. Apparatus according to any one ofthe preceding claims, wherein said second valve means is actuated by means of a bellows which senses the vapour pressure ofthe fuel in the liquid phase.
6. Apparatus according to any one ofthe preceding claims, which further includes a third valve means for regulating the flow of the fuel in the gas phase from said vaporizerto said carburettor.
7. Apparatusfor regulating the fuel supplytoa liquefied petroleum gas engine comprising
a housing;
a partition wall dividing said housing into a lower chamber providing passageforfuel in the liquid phase from afuel supplytoavaporizerand an upper chamber providing passageforfuel in the gas phase from said vaporizerto a carburettor;
a passage for fuel in the gas phase provided in said partition wall and communicating with said vaporizer;
a first opening and a second opening communicating said passage in said partition wall with said upper chamber;
a meansforsensing the temperature of fuel in the liquid phase passing through said lower chamber;;
a means for sensing the vapour pressure offuel in the liquid phase passing through said lower chamber;
a first valve means for regulating the flow of fuel in the gas phase th rough said first opening in cooperation with said temperature sensing means; and
a second valve means for regulating the flow of fuel in the gas phase through said second opening in cooperation with said pressure sensing means.
8. Apparatus according to claim 7, wherein a third opening is provided communicating said passage with said upper chamber and third valve means is provided for controlling the flow of fuel in the gas phasethrough said third opening.
9. Apparatus according to claim 7 or 8, wherein said first valve means is actuated by means of the thermal expansion and contraction of a wax contained in saidtemperature sensing means.
10. Apparatus according to claim 7,8 or9,wherein said second valve means is actuated by means of a bellows comprising said pressure sensing means.
11. Apparatus for regulating the supply of fuel to a liquefied petroleum gas engine, substantially as herein described with reference to the accompanying drawings.
12. An internal combustion engine when provided with apparatus according to any one ofthe preceding claims for regulating the supply of liquefied petroleum gas fuel thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08305257A GB2135729B (en) | 1983-02-25 | 1983-02-25 | Regulating liquefied petroleum gas supply to an engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08305257A GB2135729B (en) | 1983-02-25 | 1983-02-25 | Regulating liquefied petroleum gas supply to an engine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8305257D0 GB8305257D0 (en) | 1983-03-30 |
| GB2135729A true GB2135729A (en) | 1984-09-05 |
| GB2135729B GB2135729B (en) | 1986-07-16 |
Family
ID=10538594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08305257A Expired GB2135729B (en) | 1983-02-25 | 1983-02-25 | Regulating liquefied petroleum gas supply to an engine |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2135729B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0852348A1 (en) * | 1997-01-03 | 1998-07-08 | Renault | Thermostat, in particular for mounting downstream of an exchanger and upstream of a natural gas powered engine |
| EP1849988A3 (en) * | 2006-04-26 | 2010-03-10 | M.T.M. S.r.l. | Method and group for the LPG feeding of an internal combustion engine |
| EP2363589A3 (en) * | 2008-06-04 | 2011-11-02 | Honda Motor Co., Ltd. | Fuel feeding device for gas engine |
-
1983
- 1983-02-25 GB GB08305257A patent/GB2135729B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0852348A1 (en) * | 1997-01-03 | 1998-07-08 | Renault | Thermostat, in particular for mounting downstream of an exchanger and upstream of a natural gas powered engine |
| FR2758193A1 (en) * | 1997-01-03 | 1998-07-10 | Renault | THERMOSTAT, IN PARTICULAR FOR MOUNTING DOWNSTREAM OF AN EXCHANGER AND UPSTREAM OF A NATURAL GAS ENGINE |
| EP1849988A3 (en) * | 2006-04-26 | 2010-03-10 | M.T.M. S.r.l. | Method and group for the LPG feeding of an internal combustion engine |
| US7870849B2 (en) | 2006-04-26 | 2011-01-18 | M.T.M.-S.r.l. | Method and group for the LPG feeding of an internal combustion engine |
| EP2363589A3 (en) * | 2008-06-04 | 2011-11-02 | Honda Motor Co., Ltd. | Fuel feeding device for gas engine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2135729B (en) | 1986-07-16 |
| GB8305257D0 (en) | 1983-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |