CN1245864A - Compounded mixer for gas fuel - Google Patents
Compounded mixer for gas fuel Download PDFInfo
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- CN1245864A CN1245864A CN99118106A CN99118106A CN1245864A CN 1245864 A CN1245864 A CN 1245864A CN 99118106 A CN99118106 A CN 99118106A CN 99118106 A CN99118106 A CN 99118106A CN 1245864 A CN1245864 A CN 1245864A
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- fuel
- path
- venturi tube
- mixer
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- 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
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Abstract
In a compound mixer for gas fuel provided with a primary venturi and a secondary venturi arranged in parallel, a primary fuel passage communicating with the primary venturi, and a secondary fuel passage connected to a part on the way of the primary fuel passage and communicating with the secondary venturi, an atmospheric air introducing part is provided on the way of the secondary fuel passage, and the flow rate of the atmospheric air to be introduced is adjusted. To provide a compound mixer for gas fuel, capable of adjusting the air-fuel ratio while allowing the back flow of air from a secondary venturi side to a primary venturi side.
Description
The present invention relates to gaseous fuels such as LPG (liquefied petroleum gas (LPG)), rock gases is the fuel supply mixer of the motor of fuel, relates in particular to the compounded mixer of the duplex air suction way with first side and second side.
The duplex barrel structure that the second side air suction way of using when first side air suction way of using when loading during compounded mixer for gas fuel adopts and will hang down and middle high load is set up in parallel, the first side air suction way is provided with the one-level venturi tube, the second side air suction way is provided with the secondary venturi tube, and each is accepted gaseous fuel since nozzle and supplies with.Gaseous fuel is by the pressure governor certain pressure that roughly reduces pressure, and deliver to one-level venturi tube and secondary venturi tube by fuel passage, in case the throttle valve of each air suction way is opened according to load, owing to start the intake negative-pressure of pusher side, air just is inhaled into, and the venturi tube negative pressure that its air communication produces when crossing venturi tube just makes fuel be inhaled in the air suction way.The fuel passage of this gaseous fuel usually by the primary fuel path that pressure governor is connected with the one-level venturi tube and with the way of this primary fuel path in the secondary fuel path that is connected and is communicated with the secondary venturi tube constitute.
On the other hand, discharge, adjust or control the air fuel ratio of fuel for the combustion efficiency and output power, minimizing fuel cost and the waste gas that improve motor.Following the carrying out of this air fuel ratio control promptly, for example is being provided with oxygen concentration sensor on the outlet pipe, and according near the output of the oxygen concentration sensor of cataclysm theoretical air fuel ratio and the feedback control fuel feed, to burn with chemically correct fuel.
Yet on traditional compounded mixer for gas fuel, extremely difficulty is carried out stable highi degree of accuracy air fuel ratio control.This is because at the venturi tube suction function during in the low load operation of one-level venturi tube and fueling, air can close, not have the secondary venturi tube of suction function by the secondary fuel path and to one-level venturi tube adverse current from throttle valve.
On the other hand, in order to prevent this of air from the adverse current of secondary venturi tube to the one-level venturi tube, it is on the secondary fuel path choke valve to be set with compound vaporizer (Japanese Utility Model bulletin 1964-15720 communique) that a kind of gaseous fuel is arranged, with when making low load operation, when promptly negative pressure does not act on the secondary venturi tube air is not cut off.
Yet, even the valve that this cut-out air is used is set, owing to sneak into and postpone the actuation time of air (fuel is not full of) in the secondary fuel path and valve or leak or at the reasons such as valve driving pressure of negative pressure setting, be difficult to prevent air inversion fully, and also can delay from secondary venturi tube discharge gaseous fuel sometimes.
In addition, in case owing to thisly cause air fuel ratio appropriately not controlled to the air inversion of one-level venturi tube, just can not fully supply with acceleration fuel when quickening etc., make responsiveness low to the one-level venturi tube from the secondary venturi tube.
Above-mentioned air inversion from the secondary venturi tube also can make when being lower than idling (offidle) A/F excessive rarefied, becomes the reason of engine misses.
The present invention has considered above-mentioned conventional art, purpose is to provide a kind of compounded mixer for gas fuel, can allow air from the secondary venturi tube under the state of one-level venturi tube adverse current or suppress to regulate air fuel ratio under the state of adverse current, improve responsiveness simultaneously to the venturi tube fueling.
To achieve these goals, the present invention is a kind of compounded mixer for gas fuel, one-level venturi tube and secondary venturi tube are set up in parallel, and have the primary fuel path that is communicated with this one-level venturi tube with the way of this primary fuel path in the secondary fuel path that is connected and is communicated with aforementioned secondary venturi tube, be characterized in, the atmosphere introduction part is set in the way of aforementioned secondary fuel path, simultaneously can be to the air volume that imports is regulated.
Adopt said structure, be in the low load operation zone, the secondary fuel path of air from secondary venturi tube adverse current to the one-level venturi tube, setting make from the secondary venturi tube can not control flow rate the inflow air with from the inflow air interflow of may command (adjustings) flow of atmosphere ingress pipe and the flow control member that the synthetic gas stream after collaborating is carried out flow control, regulate the fuel flow rate of one-level venturi tube and secondary venturi tube with this, and the control air fuel ratio.
By controlling air fuel ratio so all the time rightly, can prevent the excessive rarefaction of fuel that counter-flow air causes, the responsiveness when improve quickening etc., and prevent the engine misses that excessive rarefaction causes.
Preferred construction is that flow restriction members such as throttle orifice are set on the aforementioned secondary fuel path of the upstream of aforementioned atmosphere introduction part one side.
Adopt said structure, flow restriction members such as throttle orifice can make the secondary fuel path narrow down, can effectively the one-level venturi tube be separated with the secondary venturi tube, the action separately that under the state that does not hinder fuel and air ventilation, realizes reliably, while is metered flow correctly, carries out high-precision air fuel ratio control.
A preferred construction is on the air suction way that is respectively equipped with aforementioned one-level venturi tube and secondary venturi tube the vaporizer that Fuel Petroleum is used to be set again.
Adopt said structure, but both using gases fuel can use Fuel Petroleum again, so to the highly versatile of fuel.
The another preferred construction of the present invention is that the joint at aforementioned primary fuel path and secondary fuel path is connected to the secondary fuel path and sprays the high pressure fuel passage that is higher than atmospheric fuel under high pressure.
Adopting said structure, is to suppress air inversion from the secondary fuel path by inject high pressure fuel.
Other preferred construction is to connect with aforementioned primary fuel path to adhere to atmospheric high pressure fuel passage of being higher than of different system separately on aforementioned one-level venturi tube.
Adopt said structure, fuel under high pressure is also directly supplied with in mound, one-level Fen except the primary fuel path, so especially can improve responsiveness.
A preferred construction is again, and aforementioned primary fuel path is the primary path of fuel supply with pressure governor, and aforementioned high pressure fuel passage is the low speed path of aforementioned pressure governor.
Adopting said structure, is when injection is higher than atmospheric low speed fuel and prevents air inversion, this low speed fuel is directly supplied with in the mound, one-level Fen, thereby can be improved responsiveness.
It below is simple declaration to accompanying drawing.
Fig. 1 is the basic block diagram of the gaseous fuel of the invention process form with mixer.
Fig. 2 is the basic block diagram of the gaseous fuel of the another example of the present invention with mixer.
Fig. 3 is a structural drawing of having used the motor behind the present invention.
Fig. 4 represents being connected of pressure governor of the present invention and mixer.
Fig. 5 is the another topology example of mixer of the present invention.
Fig. 6 is the Flow characteristics figure of mixer of the present invention.
Fig. 7 is the basic block diagram of yet another embodiment of the invention form.
Fig. 8 is the structural drawing that is provided with the motor of Fig. 7 mixer.
The mixer of Fig. 9 presentation graphs 8 and the joint of pressure governor.
Below in conjunction with description of drawings example of the present invention.
Fig. 1 is the basic block diagram of the compounded mixer for gas fuel of the invention process form.
In the way of secondary fuel path 7, be provided with throttle orifice 10, in its downstream side, promptly on the secondary fuel path 7 between this throttle orifice 10 and the secondary nozzle 5, be connected with atmosphere ingress pipe 11.Atmosphere ingress pipe 11 imports secondary fuel path 7 by air-strainer 12 with atmosphere, on this atmosphere ingress pipe 11, is provided with the atmosphere adjusting screw 13 of the air volume that adjusting will import.
On an air suction way 19 of one-level venturi tube 2 downstreams one side, be provided with throttle valve 14 that Fuel Petroleum uses and gasoline with a venturi tube 15, be provided with a gaseous fuel and a shared throttle valve 16 of gasoline in its downstream one side.On the secondary suction path 20 of secondary venturi tube 3 downstreams one side, be provided with the secondary venturi tube 17 that Fuel Petroleum is used in addition, be provided with gaseous fuel and the shared second throttle valve 18 of gasoline in its downstream one side.
On the compounded mixer for gas fuel of said structure, in when starting or low load operation zone, No. one time throttle valve 16 is opened, and second throttle valve 18 cuts out, and fuel is supplied with from first order jet nozzle 4.At this moment because secondary venturi tube 3 one sides are barometric pressure, so air is attracted by the intake negative-pressure of one-level venturi tube 2 one sides and passes through secondary fuel path 7 adverse currents.The present invention also imports atmosphere and its merging of having regulated flow with atmosphere adjusting screw 13 in advance by atmosphere ingress pipe 11 when this counter-flow air forms, and is transferred by primary fuel adjusting screw 8, so can obtain required air fuel ratio.In addition, even increase at load, when second throttle valve 18 is opened,, also can merge and obtain required air fuel ratio with fuel from first order jet nozzle 4 as long as cooperate the atmosphere import volume that regulates in advance correspondingly to regulate secondary fuel adjusting screw 9.
Fig. 2 is the structural drawing of the another example of the present invention.
This example is the mixer structure of gaseous fuel special use, has omitted the throttle valve 14 that gasoline is used in the earlier figures 1 and has once reached secondary venturi tube 15,17.Simple in structure.Other structures and the action effect then example with earlier figures 1 are identical.
Fig. 3 is the present invention's structural drawing of example more specifically.
On the cylinder head 22 of motor 21, form intakeport 23 and relief opening 24, Aspirating valves 25 and outlet valve 26 are housed respectively.Connect sucking pipe 32 on the intakeport 23, connect outlet pipe 27 on the relief opening 24.Exhaust purification catalyst 28 is installed on outlet pipe 27, oxygen concentration sensor 29 is installed simultaneously.The part of waste gas is returned in the sucking pipe 32 through EGR valve 31 after managing 30 by EGR, and NOx is reduced.
On sucking pipe 32, be provided with secondary duplex vaporizer 33.The structure of this secondary duplex vaporizer 33 self is known.Here do simple declaration, that is, fuel is supplied with to float chamber 36 by the float-controlled valve 35 that moves because of the effect of float 34.The 37th, ventilating hole.On the air suction way 19 of one-level, be provided with idle adjusting screw 38 and carry out idle.Aperture according to throttle valve 16 attracts fuel from main nozzle 39 by little venturi tube 40 simultaneously.The throttle valve 18 response barrier films 41 of secondary under negative pressure action and open, fuel is attracted on the air suction way 20 of secondary side by little venturi tube 48 from the main nozzle 42 of secondary.The 43rd, one-level main nozzle, the 44th, power stream valve, the 45th, secondary main nozzle, the 46th, accelerating pump.
A side is provided with air-strainer 49 in the upstream of vaporizer 33.In the inboard of the key element 49a of this air-strainer 49, mixer 1 of the present invention is connected with aforementioned vaporizer 33.The primary fuel path 6 that is communicated with the one-level venturi tube 2 of mixer 1 is connected with pressure governor 50.Pressure governor 50 is connected with not shown gas fuel tank.Secondary fuel path 7 is communicated with from 6 continuities of primary fuel path and with secondary venturi tube 3.On this secondary fuel path 7, be provided with throttle orifice 10, connect atmosphere ingress pipe 11 in its downstream one side simultaneously.This example is to be provided with to regulate flow stepping motor 51 on this atmosphere ingress pipe 11.This adjusting flow is subjected to ECU (control gear) 52 controlling and driving with stepping motor 51, and sends into secondary fuel path 7 with the atmosphere that air extraction tube 72 will have been passed through key element 49a.Operating conditions such as ECU52 input throttle valve opening signal a, engine coolant temperature signal b, engine rotational speed signal c, oxygen concentration sensor signal d, exhaust gas temperature signal e, intake negative-pressure sensor signal f are detected data, and carry out firing time and air fuel ratio control according to these data.In addition, this ECU52 brakes (slow lock) solenoid valve 60 to the low speed of pressure governor 50 and carries out drive controlling as described later.
Fig. 4 represents the communication path of pressure governor 50 and mixer 1.
Gaseous fuel is sent to pressure governor 50 by fuel hose 53 backs along arrow A.Fuel is by preheater 54 and with the vapor pressure of fuel self the 1st valve 55 is pushed open, enters the gasification of reducing pressure of a underpressure chamber 56.In case one time underpressure chamber 56 arrives authorized pressure, the 1st barrier film 57 is just pushed and is made lever 59 starts by hook 58, and the 1st valve 55 is closed.In case starter (not shown) starting, just open with the low speed braking electromagnetic valve 60 that ECU52 (Fig. 3) is connected, the fuel of regulating with adjusting screw 62 collaborates with primary path 63 (primary fuel path 6) with regard to passing through low speed path 61, along the arrow B supply engine and the outburst that takes fire.
Then, in case throttle valve is opened, the negative pressure of venturi tube just imposes on the 2nd underpressure chamber 64 through primary path 63, because the effect of this negative pressure makes lever 67 starts so that the 2nd valve 66 is opened by the 2nd barrier film 65.Make fuel enter the 2nd underpressure chamber 64 thus, and pass through primary path 63 and supply engine from the 1st underpressure chamber 56.
Primary path 63 is the primary fuel paths 6 that are communicated with the one-level venturi tube 2 of aforesaid mixer 1 of the present invention, is communicated with the secondary fuel path of using to secondary venturi tube 3 fuelings 7 in its way.On this secondary fuel path 7, be provided with throttle orifice 10, have atmosphere introducing port 11 ' simultaneously.Opening portion at this atmosphere introducing port 11 ' is equipped with stepping motor 51, to the air volume that imports is regulated.Like this, as previously mentioned, just can cooperate the fuel flow rate of primary fuel adjusting screw 8 and secondary fuel adjusting screw 9 to regulate and realize suitable air fuel ratio control.
Fig. 5 represents the example of shape of another mixer of the present invention.Wherein (A) is plan view, (B) be to comprise that the B-B of (A) analyses and observe the cut-away view of the air-strainer of part, and (C) be the C-C sectional view of (A).
Same with the example of earlier figures 3, in the inboard of the key element 49a of air-strainer 49 mixer 1 of the present invention is set.Mixer 1 has the secondary venturi tube 3 of one-level venturi tube 2, is communicated with primary fuel path 6 and secondary fuel path 7 by primary fuel adjusting screw 8 and secondary fuel adjusting screw 9 respectively.On secondary fuel path 7, be provided with throttle orifice 10, have atmosphere introducing port 11 ' simultaneously, atmosphere adjusting screw 13 is housed at the opening portion of this atmosphere introducing port 11 '.The action effect of this mixer 1 is identical with aforementioned each example.
Fig. 6 is the Flow characteristics figure from the mixer of the present invention of experiment acquisition.Transverse axis is represented inspiratory flow (unit is g/sec), and the longitudinal axis is represented fuel flow rate (unit is the L/min that is converted into behind the air).
The CLV ceiling limit value of fuel ratio when curve a is illustrated in and closes, makes the atmosphere import volume to be zero fully in the atmosphere modulating valve with mixer of the present invention, curve b represents air fuel ratio 0.9, curve c represents the measured value of mixer of the present invention, curve d represents air fuel ratio 1.0, curve e represents air fuel ratio 1.1, the lower limit of fuel ratio when curve f represents atmosphere modulating valve standard-sized sheet.Curve b, d, e are the calculated values of 100% propane fuel.
According to experimental result, shown in curve c,, can make air fuel ratio and chemically correct fuel basically identical by regulating the atmosphere import volume.Can confirm that thus available such as oxygen concentration sensor is controlled air fuel ratio accurately.
Fig. 7 is the structural drawing of the another example of the present invention.
This example is to be connected the spray end 73 of high pressure fuel passage (such as low speed path) at the primary fuel path 6 that is communicated with one-level venturi tube 2 with joint between the secondary fuel path 7 that secondary venturi tube 3 is communicated with, sprays to secondary fuel path 7 sides will be higher than atmospheric fuel under high pressure.Suppress thus air from secondary fuel path 7 to one-level venturi tube 2 adverse currents.On primary fuel path 6, connecting main fuel passage 71 from fuel supply systems such as pressure governors.
In addition, this example is except primary fuel path 6, also from the direct fueling of other fuel passage (for example branch's low speed path 74 that comes out from above-mentioned low speed forehearth limb).Therefore, although air from secondary fuel path 7 to one-level venturi tube 2 adverse currents, still can be in mound, one-level Fen 2 supply with enough fuel, the responsiveness that has improved when quickening etc.
Fig. 8 is the concrete structure figure of Fig. 7 mixer, and Fig. 9 is the details drawing of the linkage structure part between its pressure governor and the mixer.
As shown in the figure, pressure governor 50 has primary path 71 and low speed path 75, and they on the way do not collaborate but are connected with mixer 1 as following separately.Other structures, to be pressure governor 50 self identical with the example of earlier figures 3 and Fig. 4 with the structure and the action effect of mixer 1 self and motor 21 self.
In the example of Fig. 8 and Fig. 9, with primary fuel path 6 that one-level venturi tube 2 is communicated with on be connected primary path 71 from pressure governor 50.On this primary fuel path 6, same with aforesaid example, connecting the secondary fuel path 7 that is provided with throttle orifice 10.Joint between this primary fuel path 6 and secondary fuel path 7 is connecting spray end 73 from the low speed path 75 of pressure governor 50 from the direction relative with secondary fuel path 7.
In addition, the branch's low speed path 74 that comes out from these low speed path 75 branches directly with in the mound, one-level Fen 2 is connected.
Shown in Figure 4 as the aforementioned, gaseous fuel is sent to pressure governor 50 by fuel hose 53 backs along arrow A.Fuel by A chamber among the figure preheater 54 and with the vapor pressure of fuel self the 1st valve 55 is pushed open, enter a underpressure chamber 56 (B chamber) gasification of reducing pressure.Be higher than atmospheric authorized pressure (being generally 24.5-34.3Kpa) in case a underpressure chamber 56 (B chamber) reaches, the 1st barrier film 57 is just pushed and is made lever 59 starts by hook 58, and the 1st valve 55 is closed.During engine start, in case starter (not shown) starting is just opened with the low speed braking electromagnetic valve 60 that ECU52 (Fig. 8) is connected, the fuel of regulating with adjusting screw 62 is sent and supply engine by low speed path 61, begins initial detonation.
Then, in case throttle valve is opened, the negative pressure of venturi tube just imposes on the 2nd underpressure chamber 64 (C chamber) through primary path 71, the effect of this negative pressure makes lever 67 starts by the 2nd barrier film 65, the 2nd valve 66 is opened, thus, fuel enters the 2nd underpressure chamber 64 (C chamber) from the 1st underpressure chamber 56 (B chamber), and by primary path 71 supply engine and finish burning outburst.This primary path 71 is the fuel passage that is connected on the primary fuel path 6 that is communicated with the one-level venturi tube 2 of mixer 1 of the present invention as previously mentioned.
Occasion at this example, the low speed path 61 that is higher than pressure governor 50 inside that atmospheric B chamber is communicated with pressure is communicated with the low speed path 75 of pressure governor 50 outsides, and primary path 71 interflow that do not acted on negative pressure, but keep to be higher than atmospheric low speed fuel and to spray to secondary fuel path 7 from spray end 73 as the independently other system of low speed path.Thus, can suppress by secondary fuel path 7 from the air inversion of secondary venturi tube 3 to one-level venturi tube 2.
Also have, because the branch's low speed path 74 that comes out from these low speed path 75 branches directly is connected with one-level venturi tube 2 and supplies with low speed fuel, so the responsiveness raising.
As mentioned above, the present invention imports atmosphere from the secondary venturi tube at air in the low load operation zone energetically to the secondary fuel path of one-level venturi tube adverse current, and can come regulate fuel flow and control air fuel ratio by regulating its air volume.
Like this, by controlling air fuel ratio all the time rightly, can prevent the excessive rarefaction of fuel that counter-flow air causes, the responsiveness when improve quickening etc. also can prevent engine stall.In this occasion, owing to be not to be higher than the primary path interflow that atmospheric low speed fuel etc. and negative pressure are acted on, but directly spray to the secondary fuel path, adverse current can prevent excessive rarefaction so the may command air passes through the secondary fuel path.Like this, can control air fuel ratio rightly, the responsiveness that can improve simultaneously when quickening etc. also can prevent engine stall.In addition by directly supplying with this low speed fuel to the one-level venturi tube, the responsiveness that can further improve when quickening etc.
Claims (6)
1. a compounded mixer for gas fuel is set up in parallel one-level venturi tube and secondary venturi tube,
Have the primary fuel path that is communicated with this one-level venturi tube with the way of this primary fuel path in the secondary fuel path that is connected and is communicated with described secondary venturi tube,
It is characterized in that, the atmosphere introduction part is set in the way of described secondary fuel path, simultaneously can be to the air volume that imports is regulated.
2. compounded mixer for gas fuel according to claim 1 is characterized in that, on the described secondary fuel path of the upstream of described atmosphere introduction part one side the flow restriction member is set.
3. compounded mixer for gas fuel according to claim 1 and 2 is characterized in that, is provided with the vaporizer that Fuel Petroleum is used on the air suction way that is respectively equipped with described one-level venturi tube and secondary venturi tube.
4. compounded mixer for gas fuel according to claim 2 is characterized in that, is connected to the secondary fuel passage side at the joint of described primary fuel path and secondary fuel path and sprays the high pressure fuel passage that is higher than atmospheric fuel under high pressure.
5. compounded mixer for gas fuel according to claim 2 is characterized in that, connects with described primary fuel path on described one-level venturi tube and adheres to atmospheric high pressure fuel passage of being higher than of different system separately.
6. according to claim 4 or 5 described compounded mixer for gas fuel, it is characterized in that described primary fuel path is the primary path of fuel supply with pressure governor, described high pressure fuel passage is the low speed path of described pressure governor.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP232798/1998 | 1998-08-19 | ||
| JP23279898 | 1998-08-19 | ||
| JP11192860A JP2000130264A (en) | 1998-08-19 | 1999-07-07 | Compound mixer for gas fuel |
| JP192860/1999 | 1999-07-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1245864A true CN1245864A (en) | 2000-03-01 |
Family
ID=26507562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99118106A Pending CN1245864A (en) | 1998-08-19 | 1999-08-17 | Compounded mixer for gas fuel |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2000130264A (en) |
| CN (1) | CN1245864A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220921A (en) * | 2010-04-13 | 2011-10-19 | 上海格令汽车电子有限公司 | Integrated gas supply device for gaseous propellant engine system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7028675B2 (en) * | 2003-11-11 | 2006-04-18 | Vapor Fuel Technologies, Inc. | Vapor fueled engine |
-
1999
- 1999-07-07 JP JP11192860A patent/JP2000130264A/en active Pending
- 1999-08-17 CN CN99118106A patent/CN1245864A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220921A (en) * | 2010-04-13 | 2011-10-19 | 上海格令汽车电子有限公司 | Integrated gas supply device for gaseous propellant engine system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000130264A (en) | 2000-05-09 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |