CN1101517C - Fuel regulating system - Google Patents
Fuel regulating system Download PDFInfo
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- CN1101517C CN1101517C CN98101870A CN98101870A CN1101517C CN 1101517 C CN1101517 C CN 1101517C CN 98101870 A CN98101870 A CN 98101870A CN 98101870 A CN98101870 A CN 98101870A CN 1101517 C CN1101517 C CN 1101517C
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Abstract
The present invention relates to a gas supply regulating system which is used for regulating gas supply from a supplied gas storage tank to a device needing gas. A slide valve 20 is arranged in a valve chamber 22 of a primary balance valve. The stability of pressure in a first chamber 2 is controlled by a response device, and pressure P1 can be prevented from changing when the pressure of supplied gas storage tank is changed from high to low. When the quantity of supplied gas reaches the limit, a first area 5 and a second area are communicated with each other through a control valve 25, and the gas pressure of the two chambers can be balanced; thus, a first outlet 13 is closed to stop supplying gas. The regulating system is suitable for gas fuel engines, internal combustion engines which uses gas fuel and is modified from diesel engines, and other devices such as hot gas supply devices and pressure regulating devices.
Description
The present invention relates to a kind of fuel regulating system, particularly but be not only and relate to a kind of internal-combustion engine with CNG compressed natural gas gas supply regulator regulating device.
Existing gas conditioner is being supplied with to internal-combustion engine aspect the accurately stable combustion gas and fuel, and perhaps expense is too high, perhaps weak effect.The most general problem is when to be the gas incoming pressure change in when almost sky exhausts (gas tank) scope from high pressure (when gas tank is full of) to low pressure, and the delivery pressure control of this gas regulator is inaccurate.Because delivery pressure control is inaccurate, when incoming pressure changed, the gas quantity of being exported by regulator also changed.This poorly controlled direct influence is for example by the performance of the motor of air feed.The known the simplest method that addresses the above problem is that adopting minimum is three grades of decompressions, but this method is expensive more a lot of than two-stage decompression expense, and also very complicated.
The object of the invention provides a kind of fuel regulating system, and this system can provide accurately stable gas output pressure in a quite wide gas incoming pressure scope.
In view of the above, a first aspect of the present invention comprises the air feed controlling device, is used to regulate from pressure reservoir to the air feed the need device of air, and described air feed controlling device has or comprises:
Room (1) first, by the suction valve receiver gases, described first Room changes equipment by the first Room barrier film, piston or other periphery and the volume of first Room can be changed.
Room (2) second, receive the first area of air-flow to the second chamber from above-mentioned first Room, this second Room comprises two zones that separate, i.e. first area and second area, separate this second Room and become the equipment of two regional usefulness to move, thereby influence two zone volumes separately of this second Room.
Room (3) the 3rd, described the 3rd Room can be passed through the 3rd Room barrier film, piston or other peripheral equipment that changes and change its volume, and the 3rd Room can receive the air-flow from first area, second Room.
A second aspect of the present invention comprise be used to regulate air inlet or be used for an one-level equilibrium valve on the air feed controlling device, it comprises:
Form the equipment of a chamber, this chamber has suction port and air outlet;
The sealing equipment, this sealing equipment can be guiding valve, can fully seal this air-flow between above-mentioned suction port and air outlet;
The skew equipment can move above-mentioned guiding valve equipment, makes it be in the state that does not have this air-flow of complete closed; And response equipment, gas outlet pressure is played the equipment (influenced by the gas export requirement) of response, act on the closure member with outlet pressure, to influence the motion of closure member, its structure and arrangement are: act on the air pressure on the closure member in the described chamber, it acts on the power of the one air pressure * area on the described closure member, this power is offset fully by the power of rightabout air pressure * area, thereby makes sealing equipment be mainly described skew equipment and be subjected to the effect of the response equipment that gas outlet pressure influences and move.
Another aspect of the present invention provides an air feed controlling device, between the first area and second area of its second Room, has a control channel, controlling this air-flow by a control valve therefrom passes through, when air-flow flows out described device when reaching capacity, described control valve is opened, and makes two pressure balances in the zone.
The present invention includes the imagination structure in foregoing and the following example.
Consult following accompanying drawing and introduce the embodiment of a kind of preferred form of the present invention, Brief Description Of Drawings is as follows:
Figure 1 shows that the preferred form of this regulator, the position when regulator is in and does not need air feed with device of air;
The regulator that Figure 2 shows that Fig. 1 is in the position when supplying with low tolerance with device of air;
The regulator that Figure 3 shows that Fig. 1 is in the position when supplying with high tolerance with device of air;
Figure 4 shows that the one-level equilibrium valve, be used for first class pressure and regulate;
Figure 5 shows that when using the known pressure regulator, change relevant first class pressure variation diagram with storage pressure;
Figure 6 shows that situation of the present invention when control channel is opened;
Figure 7 shows that the process flow diagram of this air regulating device when connecting use;
Second chamber pressure that Figure 8 shows that another kind of structure changes equipment;
Figure 9 shows that the detail drawing of solenoid electric valve among the present invention.
Figure 10 shows that the structure by the valves known of outlet pressure control of common employing;
Figure 11 shows that speed control unit;
Figure 12 shows that the preferred structure detail drawing of the one-level equilibrium valve of apparatus of the present invention;
Figure 13 shows that the partial plan view of one-level equilibrium valve among Figure 12;
The gas charging-tank of the air regulating device of preferred form of the present invention and inventory of gas links and maybe can link.Device of the present invention can be used for the supplying gaseous fuel that the air feed of all gases demand device, particularly the present invention can be used for the internal-combustion engine handled by mainfold vacuum; Though preferred gas is CNG, those of ordinary skills can understand that air regulating device of the present invention also will be applicable to other gas.
The operation of following air regulating device and description will be narrated with internal-combustion engine, but the those skilled in the art in a present technique field will be applied to apparatus of the present invention other gas demand device.
Air regulating device under pressure P r from the gas supplying tank receiver gases, under pressure P d, gas is sent into motor then, as shown in Figure 7.
Regulator of the present invention is a two-stage controller, it can input air pressure Pr in very large range under, a constant gas outlet pressure Pd is provided.Range of working pressure is under 200 crust～10 Palestine and Israels.
Under pressure P r, supply with the gas that receives the cylinder from gas and enter first Room 2, as shown in Figure 1 through suction valve 1.First Room 2 is the chamber of a variable volume, and its volume is regulated by the barrier film 3 of first Room.The volume-variation of first Room 2 also can be regulated and control by piston and cylinder mechanism or any equipment that other is suitable for.The air-flow that enters first Room 2 is by first indoor pressure P 1 decision.Fig. 4 is the details drawing of suction valve 1, and suction valve 1 preferred form as shown in figure 12.
Suction valve is an one-level equilibrium valve, and it comprises the sealing equipment, and this sealing equipment can be the guiding valve 20 that is installed in the valve chamber 22.Axial motion in the space that guiding valve 20 can limit in valve chamber 22.
Connecting rod 24 links to each other guiding valve 20 with the first Room barrier film 3 in first Room 2.Have at least an outlet 23 to lead to first Room 2 in the passage.The motion boundary of guiding valve 20 is for providing the air-flow path of a qualification, this passage is to feed first Room 2 through valve chamber 22, outlet 23, and at least on other position of this guiding valve 20, can provide a less qualification air-flow, through valve chamber 22, outlet 23, flow out in first Room 2.
If the pressure in first Room 2 increases, then because the motion of the first Room barrier film 3 can make the volume of first Room 2 increase.Being set to when the volume of first Room 2 enlarges of connecting rod 24, guiding valve 20 move valve chamber 22 in, thus increase is to from gas supplying tank and the restriction that enters the interior air-flow in first Room 2.
In order to compensate the variation of gas supplying tank pressure P r, designed guiding valve 20, so that under the influence of the Pr that is not stressed, independent operation.This process is achieved by the gas pressure transmission between the back pressure surface 30 of the preceding pressure surface 31 of guiding valve 20 and guiding valve 20, as shown in Figure 4.In a preferred form of the invention, this gas pressure transmission realizes by following process, promptly between the volume of guiding valve 20 both sides, form a guiding valve control hole 21, to guarantee that air feed tank acts on surface 30 and 31 with the pressure that equates, the area size of the back pressure surface 30 of guiding valve 20 should be can provide a power, this power and the power that acts on front surface 31 by pressure P r generation, opposite sign but equal magnitude, because the air pressure that acts on surface 31 and surperficial 30 is identical, thereby, the area on two surfaces should be identical, so the pressure P r of gas supplying tank acts on the power on the guiding valve 20, is cancelled effectively.Like this, unique other power that maybe can act on the guiding valve 20 that acts on is the active force of the air pressure P1 in first Room 2.Figure 12 is the fragmentary detail view of Fig. 4, the one-level equilibrium valve of expression preferred form.
This one-level equilibrium valve links to each other with a gas supplying tank, or outwards connects by a corresponding equipment 50 that connects.This connects equipment 50, for example can be fixed on the housing of air regulating device by screw thread etc.
Between the housing of air regulating device and the interface that is connected equipment 50, be set with a pad 51 connecting on equipment 50 peripheries.Gas is chewed 27 and is had a bearing, is used to prop up the sealing gasket 52 of this guiding valve 20.Act on the rear surface 30 by the gas that is stored between O RunddichtringO 53 and 54.
The connecting rod 24 that links to each other with guiding valve 20 links to each other with the first Room barrier film 3 with 56 by needle bearing 55.24 on guiding valve 20 and connecting rod are linked to each other by carrier bar 57.Figure 13 is the planimetric map of carrier bar 57, shows among the figure that carrier bar 57 links to each other with connecting rod 24 with guiding valve 20.
From the gas of gas supplying tank, when entering first Room 2, suction valve 1 descends gas pressure.Pressure is that the gas of P1 can flow into first areas 5 through first passage 6 in first Room 2, and speed controller 25 is communicated with first area 5 and second area 7.Second Room 5 and 7 comprises first area 5 and second area 7.First and second zones are separated by an equipment, and this equipment can change the volume in described first and second zones.Shown in Fig. 1,2,3,6 and 11, this is equipped for barrier film 9.Certainly the volume-variation of first area 5 and second area 7 also can be equipped by other and be realized, piston-cylinder equipment as shown in Figure 8.
In the speed controller of Figure 11, gas in the first area 5 and the transmission of 7 of second areas realize that by second outlet 28 (valve or valveless are housed) and by passage 8 this passage 8 also can communicate with second Room and the 3rd Room.The variation that is inversely proportional to of the volume of first area 5 and second area 7.When the volume of first area 5 increased, the volume of second area 7 reduced inversely.Second barrier film 9 is installed between first area 5 and the second area 7, and separates this two zone, and it is constant that the total measurement (volume) of first area 5 and second area 7 keeps.First area 5 and second area 7 variation of volume separately depend on the pressure reduction of two zones 5 and 7 air pressure.
Except that barrier film 9 was set, another program promptly was provided with the cylinder of a band piston respectively for two piston-cylinders are set in aforesaid first area 5 and second area 7.Two piston-cylinders 43 in described first area 5 and the second area 7 and 44 are connected to the transmission that can guarantee the volume-variation between each chamber, see Fig. 8.As can be seen from Fig. 8, though the total measurement (volume) in first and second zones keeps constant in a preferred form, as uses the piston 43 and 44 of different-diameter, will cause that total measurement (volume) changes in first area 5 and the second area 7.This may bring various benefits to apparatus of the present invention.
As shown in Figures 2 and 3, gas channel 8 and each outlet 28 and 12 are arranged in another way, and passage 8 and outlet 12 are combined into one among the figure.Above-mentioned dual mode all can be realized task of the present invention under similar fashion.Air-flow leaves the 3rd Room 11 under outlet pressure Pd.
When the engine shutdown undesirable gas, the gas in the gas supplying tank can enter first Room 2 by suction valve 1, and in first passage 6 enters first area 5 in second Room 5 and 7.In this section, gas also can enter second area 7 by the gas outlet 28 and 8 of valveless passage.When engine shutdown did not need gas, the pressure in first Room 2, first area 5 and the second area 7 equated that because be not subjected to the effect of engine intake manifold vacuum at this moment in the 3rd Room 11 septations 15, so valve member 16 remains closed.
When engine idle or low load operation (as shown in Figure 2), the air-distributor vacuum of motor shrinks the 4th barrier film 14, and barrier film 15 moves, and makes the volume reducing in the 3rd Room 11, causes link arm 18 to rotate around axle 29, makes air communication cross outlet 12 and flows.Because little to the tolerance demand under idling and low-load, this outlet 28 still can by enough tolerance with supply the 3rd Room 11 and keep first area 5 and second area 7 in pressure equal.Spring 10 guarantees that this first area valve member 19 keeps airtight, does not allow air communication to cross this outlet 13.When available adjustment screw 17 is adjusted in idling through exporting 12 limited flow.
When medium and full load (as Fig. 3), act on the manifold vacuum up that air feed is pressed Pd.This causes volume further reduction owing to moving of the 3rd Room barrier film 15 of the 3rd Room 11.This has just reduced restriction to the air-flow through exporting 12 (being controlled by valve member 16) outflow.When high tolerance required, outlet 28 can not be fully to second area 7 air feed, and this second area 7 is to the 3rd Room and motor air feed.This just makes air pressure in the second area 7 less than the air pressure in the first area 5.Pressure in the second area 7 reduces, and barrier film 9 is left valve member 19 from its seat, and gas is entered in the 3rd Room 11 through first outlet 13.
Medium and at full capacity the time at motor, the unlatching of first outlet 13 has guaranteed that this motor obtains sufficient tolerance from air feed tank.
The motor service condition is this adjusting pressure P
1Constant more good more.Common modulating valve as shown in figure 10.In a common step valve, this adjusting pressure P '
1Act on the barrier film 32.In theory, pressure P '
1Only be decided by to make the variable volume chamber volume to change required power, be barrier film power.The ratio of connecting rod and lever 33 is constant, not with the air feed tank pressure P '
rAnd change, yet as Figure 10, also have a masterpiece be used in the sealing seat surface long-pending 34 ' on, and this power with air feed cylinder pressure P '
rChange and change, so this adjusting pressure P '
1Be affected.When if air feed tank is full of, this pressure P '
rBe generally 200 crust.With air feed tank will emptying the time its pressure have only 15 crust to compare, this is regulated and presses P '
1Must be more higher, offsetting this extra power, Fig. 5 shows when adopting regulator shown in Figure 10, and this adjusting pressure is with the theoretical variation diagram of air feed tank variation in pressure.
Fig. 4 illustrates the working principle of this one-level equilibrium valve, and the restriction air-flow that has overcome this valve is subjected to the problem of air feed tank pressure influence.
The guiding valve 20 of this one-level equilibrium valve is mechanically linked to each other with barrier film 3 by connecting rod 24, guarantees that this guiding valve contacts with this barrier film reliably.
The engine speed controller schematic representation of Fig. 6 for adopting in this device, it is by for example air-distributor vacuum operation of CNG motor, methanol engine etc. of motor.
At first, under medium and full load situation, barrier film 9 makes first area valve member 19 separate with seat, and gas can be flowed out by first gas outlet 13.By the signal of solenoid valve 25 acceptance point ignition systems and open this control channel 35, make it unlikely excessive with the air inlet of control motor.It makes gas enter second area 7.And the pressure in first area 5 and the second area 7 is equated, and closing or to limit this first outlet 13, thus the tolerance that restriction is supplied with to motor.When engine speed dropped to certain speed, this solenoid valve 25 cut out this control channel 35 again.When motor moved under various constant speeds, the whole barrier films and the valve of this device were in the equilibrium position, and air feed tank is supplied with the gas of constant basis to motor.
This solenoid valve 25 also can be the valve with mechanical device control, for example valve on some diesel engine.
By the airflow limitation that air regulating device carries out, purpose is that motor is moved under stable speed.Figure 11 shows the engine speed control gear, it gas supply with and the first order reduce pressure on all with above-mentioned different.Fig. 9 illustrates the solenoid valve of the present invention of preferable configuration.In this structure, this solenoid valve uses the screw thread spinning on the housing of two-way adjusting part, and is communicated with the control channel 35 of this first area and second area.Solenoid valve among Fig. 9 by with wire terminal 63 ' energising control of coil 59 ' link to each other.This coil control this valve rod 60 ' successively by valve seat 40 ' and 61 ', come control flows through control channel 35 ' air-flow.Spring 62 ' this valve seat of promotion is in closed state, by the electric current of supplying with to coil regulate by control channel 35 ' air-flow.
This equipment mechanism has guaranteed to supply with by the tolerance of suction valve and channel gas controlling device, and the influence that it is not pressed by air inlet can be when suction pressure in very large range changes, and it is constant to keep-up pressure.Engine speed controller among Figure 11 can need not to be applied on the air regulating device as shown in Figure 1.This engine speed controller can be used in various other systems, and present technique field those of ordinary skill can be understood and applies it in other device that needs air feed control.Engine speed controller shown in Figure 11 can be applied in separately on other various devices, through first gas outlet 13 of this device and passage 8 from first and second zones to need device of air air feed, air-flow through passage 8 is decided according to the position of the 3rd Room valve member 16, and decide according to the requirement that needs device of air this position.
The present invention can be used for comprising and adopting menifold pressure, i.e. (not only mainfold vacuum h type engine h) on the supercharged engine on any motor that requires constant decompression.The present invention can be applicable on the non-engine device equally, for example devices such as pressure adjusting and hot gas supply.
The present invention can be used for diesel engine refitted is become to use on the motor of vaporized fuel, as regulating system.
Claims (11)
1, a kind of fuel regulating system is used to regulate from pressure reservoir to the air feed the need device of air, has or comprises:
One, described air feed controlling device comprises:
1. first Room (2), by suction valve (1) receiver gases, this first Room changes equipment by the first Room barrier film, piston or other periphery and the volume of this first Room can be changed;
2. second Room, first area (5) from receiver gases to the second chamber, above-mentioned first Room (2), this second Room comprises two zones that separate, be first area (5) and second area (7), separate this second Room and become the equipment of two regional usefulness to move, thereby influence two zone volumes separately of this second Room;
3. the 3rd Room (11), the 3rd Room can be passed through the 3rd Room barrier film (15), piston or other peripheral equipment that changes and change its volume, and the 3rd Room can receive the air-flow from first area, second Room (5);
When the pressure of the first area (5) of second Room and second area (7) equates, be subjected to this pressure-operated valve member (19) to cut off the main air feed of second Room to the 3rd Room (11);
Two, also have or comprise the one-level equilibrium valve, comprising:
1. form the equipment of a chamber (22), this chamber has suction port and air outlet;
2. (20) are equipped in sealing, and this sealing equipment can fully seal this air-flow between above-mentioned suction port and air outlet;
3. skew equipment can move above-mentioned guiding valve equipment, make its be in the state that do not have this air-flow of complete closed and
4. response is equipped, gas outlet pressure is played the equipment of response, act on the closure member (20) with outlet pressure, to influence the motion of this closure member, its structure and arrangement are: act on the air pressure on this closure member (22) in the described chamber and multiply by the power that area (A1) produces and offset fully by the power that rightabout air pressure multiply by area (A2), thereby make the sealing equipment be mainly described skew equipment and gas outlet pressure influence the response equipment effect and move;
Three, control valve (35), between the first area (5) and second area (7) of described second Room, has a control channel (35), controlling combustion gas by this control valve therefrom passes through, when air-flow flows out this air feeder when reaching capacity, described control valve is opened, and the pressure in first area (5) and the second area (7) is equated.
2, fuel regulating system according to claim 1 is characterized in that: the described first Room barrier film, piston or other peripheral variation are equipped for a barrier film (3).
3, fuel regulating system according to claim 1 and 2 is characterized in that: the described first Room barrier film (3) is by skew equipment (4) effect, and its offset direction is for making the first Room volume reducing direction.
4, air feed circular pitch according to claim 1 system, it is characterized in that: the sealing in the described suction valve (1) is equipped for the guiding valve (20) that can move between the limited range in the valve chamber (22), and this limited range is to cross state from the sealing state of closure to the permission air communication of opening; Described guiding valve (20) has: first surface (31), gas act on this first surface (31) from pressure reservoir along first direction; On this second surface (30), described first, second surface has equal pressure surface long-pending (A1, A2) from pressure reservoir along the directive effect opposite with first direction for second surface (30), gas, makes suction pressure be essentially zero to its effect; And have the equipment that pressure is equated.
5, fuel regulating system according to claim 4 is characterized in that: described make that pressure equates be equipped for a passage (21), this passage passes this guiding valve (20), makes to supply with air pressure and communicate with the chamber that comprises second surface (30).
6, fuel regulating system according to claim 5 is characterized in that: described guiding valve (20) is fixed on the end of a connecting rod (24).
7, fuel regulating system according to claim 1, it is characterized in that: the described equipment that second Room is separated into two zones (5,7) is a barrier film (9), removable position on this barrier film is fixed with first area valve member (19) and makes the equipment of the second Room membrane displacement, and the skew action direction is kept closed for making the first area valve member.
8, fuel regulating system according to claim 3 is characterized in that: described make first barrier film (3) skew be equipped for spring (4).
9, fuel regulating system according to claim 7 is characterized in that: described make second barrier film (9) skew be equipped for spring (10).
10, fuel regulating system according to claim 1, it is characterized in that: described the 3rd Room barrier film, piston or peripheral the variation are equipped for barrier film (15), mobile position or place, removable position at it are connected with the 3rd Room barrier film link arm (18), this link arm is connected the mobile position of the 3rd Room barrier film with the 3rd Room valve member (16), with the air-flow of control from the discharge of the second Room gas outlet (12).
11, fuel regulating system according to claim 10 is characterized in that: described air-flow can be used the external calibration that links to each other with the 3rd Room valve member to equip equally and control.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101870A CN1101517C (en) | 1998-05-20 | 1998-05-20 | Fuel regulating system |
| HK00103059A HK1024041A1 (en) | 1998-05-20 | 2000-05-23 | Fuel regulating systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101870A CN1101517C (en) | 1998-05-20 | 1998-05-20 | Fuel regulating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1236060A CN1236060A (en) | 1999-11-24 |
| CN1101517C true CN1101517C (en) | 2003-02-12 |
Family
ID=5216975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98101870A Expired - Fee Related CN1101517C (en) | 1998-05-20 | 1998-05-20 | Fuel regulating system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1101517C (en) |
| HK (1) | HK1024041A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436774C (en) * | 2006-07-25 | 2008-11-26 | 张兵 | Air intake pressure regulator for internal combustion engine |
| EP3871060A1 (en) * | 2018-10-23 | 2021-09-01 | Pietro Fiorentini S.P.A. | Pressure regulator for gas distribution system and pilot device for piloting pressure regulators |
| CN118241183B (en) * | 2024-05-29 | 2024-08-06 | 鸿舸半导体设备(上海)有限公司 | Chemical vapor deposition air supply system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4455979A (en) * | 1982-03-01 | 1984-06-26 | Maurice Lechmere Brown | Carburettors for internal combustion engines |
| EP0777168A2 (en) * | 1995-11-06 | 1997-06-04 | Itt Manufacturing Enterprises, Inc. | A CNG regulator |
-
1998
- 1998-05-20 CN CN98101870A patent/CN1101517C/en not_active Expired - Fee Related
-
2000
- 2000-05-23 HK HK00103059A patent/HK1024041A1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4455979A (en) * | 1982-03-01 | 1984-06-26 | Maurice Lechmere Brown | Carburettors for internal combustion engines |
| EP0777168A2 (en) * | 1995-11-06 | 1997-06-04 | Itt Manufacturing Enterprises, Inc. | A CNG regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1024041A1 (en) | 2000-09-29 |
| CN1236060A (en) | 1999-11-24 |
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Owner name: PEIXIN NATURAL GAS EQUIPMENT CO., LTD. Free format text: FORMER OWNER: TRANSPORT FUEL SYSTEMS LTD. NEW ZEALAND Effective date: 20030516 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20030516 Address after: Hongkong, China Patentee after: Pui sing natural gas equipment Co., Ltd. Address before: Auckland Patentee before: Transport Fuel Systems Ltd. New Zealand |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |