CN104595530A - Pressure-regulating device for dual-fuel engine - Google Patents
Pressure-regulating device for dual-fuel engine Download PDFInfo
- Publication number
- CN104595530A CN104595530A CN201510044606.XA CN201510044606A CN104595530A CN 104595530 A CN104595530 A CN 104595530A CN 201510044606 A CN201510044606 A CN 201510044606A CN 104595530 A CN104595530 A CN 104595530A
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- Prior art keywords
- pressure
- described valve
- valve block
- spool
- valve body
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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- 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
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pressure-regulating device for a dual-fuel engine. The pressure-regulating device comprises a valve body, wherein a valve base is arranged at one end in the valve body; a valve core is arranged on the inner side of the valve base; a valve block is arranged on the inner side of the valve core; an outer peripheral surface of the valve block is in sealing fit with an inner peripheral surface of the valve body; an end cover is arranged at the other end in the valve body; an oil pressure chamber is arranged on an inner end face of the end cover; an oil inlet is formed in an outer end face of the end cover; a separating ring is raised in the chamber; a neck part of the valve core is in sealing fit with the separating ring; a pressure-relieving channel is arranged in the valve block; the top end of the valve core is in sealing fit with an inlet of the pressure-relieving channel; a pressure-regulating gas inlet, a burning gas supply port and a pressure-relieving port are respectively arranged in the valve body; a valve core displacement pressure-regulating device is arranged between the valve core and the valve base; a valve block displacement pressure-regulating device is arranged between the valve block and the valve body. The pressure-regulating device provided by the invention can regulate the natural gas pressure in real time according to the pressure of diesel oil, so that the natural gas pressure can meet the requirement for the practical working condition of the engine.
Description
Technical field
The present invention relates to technical field of engines, particularly relate to a kind of duel fuel engine pressure regulator.
Background technique
For duel fuel engine, its fuel used is bavin oil and gas usually.The pressure regulation technology of diesel oil is very ripe, can diesel pressure be regulated as required fast to specified pressure, but the pressure regulation technology of rock gas needs to improve further.
Summary of the invention
Technical problem to be solved by this invention is to provide one can regulate gas pressure in real time according to diesel pressure, make gas pressure can meet motor actual conditions demand and change according to the change of operating mode, thus improving the power character of motor and the duel fuel engine pressure regulator of Economy.
For solving the problems of the technologies described above, technological scheme of the present invention is: duel fuel engine pressure regulator, comprise the valve body with through chamber, in described valve body, one end sealing is provided with valve seat, slide axially inside described valve seat and be provided with spool, described spool fit inside is provided with valve block, and the outer circumferential face of described valve block and the inner peripheral surface of described valve body are sealed and matched; In described valve body, the other end sealing is provided with end cap, and be arranged with oil pressure chamber in the interior edge face of described end cap, the exterior edge face of described end cap is provided with the filler opening being communicated with described oil pressure chamber; Described chamber is projecting inward is provided with spacer ring, and the neck of described spool and described spacer ring are sealed and matched and define the pressure regulation air-inlet cavity and the confession air cavity that burns that lay respectively at described spacer ring both sides; Described valve block is provided with and is communicated with the pressure release passage of described burning for air cavity, and the top of described spool coordinates with the inlet seal of described pressure release passage; The outer surface of described valve body is respectively equipped with the pressure regulation suction port, burning air supply opening and the pressure relief opening that are communicated with described pressure regulation air-inlet cavity, described burning confession air cavity and described pressure release passage; Be provided with spool travel pressure regulator between described spool and described valve seat, between described valve block and described valve body, be provided with valve block displacement and pressure controlling device.
As preferred technological scheme, described spool travel pressure regulator comprises the valve core rod that described spool bottom is provided with, the guiding groove be slidably matched with described valve core rod is provided with inside described valve seat, described valve core rod is arranged with spool travel Regulation spring, the two ends of described spool travel Regulation spring are resisted against the bottom with described spool inside described valve seat respectively.
As the improvement to technique scheme, described valve seat outer circumferential face is provided with screw thread, and described valve seat and described valve body screw thread are tightly connected.
As the improvement to technique scheme, described valve block displacement and pressure controlling device comprises the valve block bar that described valve block is provided with away from one end of described spool, and described valve block bar stretches in described oil pressure chamber, and the top of described valve block bar is provided with baffle plate; Be positioned at described valve block in described valve body and be provided with block away from the side of described spool, described valve block bar is arranged with valve block displacement Regulation spring, the two ends of described valve block displacement Regulation spring are resisted against on described block and described baffle plate respectively.
As the improvement to technique scheme, described valve block bar passes described baffle plate and the adjusting nut that has been threaded.
As the improvement to technique scheme, between the outer circumferential face of described valve block and the inner peripheral surface of described valve body, be provided with seal ring.
As the improvement to technique scheme, described pressure release passage comprises the internal channel being located at described valve block inside and the pressure-releasing chamber be located on described valve block outer circumferential face, and described pressure-releasing chamber is connected with described pressure relief opening.
Owing to have employed technique scheme, duel fuel engine pressure regulator, comprise the valve body with through chamber, in described valve body, one end sealing is provided with valve seat, slide axially inside described valve seat and be provided with spool, described spool fit inside is provided with valve block, and the outer circumferential face of described valve block and the inner peripheral surface of described valve body are sealed and matched; In described valve body, the other end sealing is provided with end cap, and be arranged with oil pressure chamber in the interior edge face of described end cap, the exterior edge face of described end cap is provided with the filler opening being communicated with described oil pressure chamber; Described chamber is projecting inward is provided with spacer ring, and the neck of described spool and described spacer ring are sealed and matched and define the pressure regulation air-inlet cavity and the confession air cavity that burns that lay respectively at described spacer ring both sides; Described valve block is provided with and is communicated with the pressure release passage of described burning for air cavity, and the top of described spool coordinates with the inlet seal of described pressure release passage; The outer surface of described valve body is respectively equipped with the pressure regulation suction port, burning air supply opening and the pressure relief opening that are communicated with described pressure regulation air-inlet cavity, described burning confession air cavity and described pressure release passage; Be provided with spool travel pressure regulator between described spool and described valve seat, between described valve block and described valve body, be provided with valve block displacement and pressure controlling device; The present invention has following beneficial effect: regulate burning for the pressure of air cavity by the pressure in described oil pressure chamber, and maintain a relatively stable pressure difference, burning can with the pressure real-time change in oil pressure chamber for the pressure of air cavity, make combustion gas pressure can meet the demand of motor actual conditions and change according to the change of operating mode, thus power character, the Economy of motor can be improved, and be conducive to the emission performance optimizing motor.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to sectional view;
Fig. 3 is the schematic perspective view of the embodiment of the present invention.
In figure: 1-valve body; 11-spacer ring; 12-pressure regulation air-inlet cavity; 13-burning is for air cavity; 14-pressure regulation suction port; 15-burns air supply opening; 16-pressure relief opening; 17-block; 2-valve seat; 21-guiding groove; 3-spool; 31-top; 32-neck; 33-valve core rod; 4-valve block; 41-entrance; 42-internal channel; 43-pressure-releasing chamber; 44-valve block bar; 45-baffle plate; 5-end cap; 51-oil pressure chamber; 52-filler opening; 6-spool travel Regulation spring; 7-valve block displacement Regulation spring; 8-adjusting nut; 9-seal ring.
Embodiment
Below in conjunction with drawings and Examples, set forth the present invention further.In the following detailed description, the mode only by illustrating describes some one exemplary embodiment of the present invention.Undoubtedly, those of ordinary skill in the art can recognize, when without departing from the spirit and scope of the present invention, can revise by various different mode to described embodiment.Therefore, accompanying drawing is illustrative with being described in essence, instead of for limiting the protection domain of claim.
As shown in Figure 1, Figure 2 and Figure 3, duel fuel engine pressure regulator, comprises the valve body 1 with through chamber, and in described valve body 1, one end sealing is provided with valve seat 2, and described valve seat 2 outer circumferential face is provided with screw thread, and described valve seat 2 is connected with described valve body 1 thread seal; Slide axially inside described valve seat 2 and be provided with spool 3, described spool 3 fit inside is provided with valve block 4, and the outer circumferential face of described valve block 4 and the inner peripheral surface of described valve body 1 are sealed and matched; In described valve body 1, the other end sealing is provided with end cap 5, and be arranged with oil pressure chamber 51 in the interior edge face of described end cap 5, the exterior edge face of described end cap 5 is provided with the filler opening 52 being communicated with described oil pressure chamber 51; Described chamber is projecting inward is provided with spacer ring 11, and neck 32 and the described spacer ring 11 of described spool 3 are sealed and matched and define the pressure regulation air-inlet cavity 12 and the confession air cavity 13 that burns that lay respectively at described spacer ring 11 both sides; Described valve block 4 is provided with and is communicated with the pressure release passage of described burning for air cavity 13, and the top 31 of described spool 3 is sealed and matched with the entrance 41 of described pressure release passage; The outer surface of described valve body 1 is respectively equipped with and is communicated with described pressure regulation air-inlet cavity 12, the described pressure regulation suction port 14, burning air supply opening 15 and the pressure relief opening 16 that supply air cavity 13 and described pressure release passage of burning; Described pressure release passage comprises the internal channel 42 being located at described valve block 4 inside and the pressure-releasing chamber 43 be located on described valve block 4 outer circumferential face, and described pressure-releasing chamber 43 is connected with described pressure relief opening 16; Be provided with spool travel pressure regulator between described spool 3 and described valve seat 2, between described valve block 4 and described valve body 1, be provided with valve block displacement and pressure controlling device.
In the present embodiment, described spool travel pressure regulator comprises the valve core rod 33 that described spool 3 bottom is provided with, the guiding groove 21 be slidably matched with described valve core rod 33 is provided with inside described valve seat 2, described valve core rod 33 is arranged with spool travel Regulation spring 6, and the two ends of described spool travel Regulation spring 6 are resisted against the bottom with described spool 3 inside described valve seat 2 respectively.
In the present embodiment, described valve block displacement and pressure controlling device comprises the valve block bar 44 that described valve block 4 is provided with away from one end of described spool 3, and described valve block bar 44 stretches in described oil pressure chamber 51, and the top of described valve block bar 44 is provided with baffle plate 45; Be positioned at described valve block 4 in described valve body 1 and be provided with block 17 away from the side of described spool 3, described valve block bar 44 is arranged with valve block displacement Regulation spring 7, the two ends of described valve block displacement Regulation spring 7 are resisted against on described block 17 and described baffle plate 45 respectively.
Described valve block bar 44 passes described baffle plate 45 and the adjusting nut 8 that has been threaded, by adjusting nut 8, can valve block displacement Regulation spring 7 between precompression block 17 and baffle plate 45, thus obtain basic oil pressure chamber 51 pressure and the burning pressure difference value for air cavity 13 pressure; For improving the effect that is sealed and matched, between the outer circumferential face of described valve block 4 and the inner peripheral surface of described valve body 1, be provided with seal ring 9.
Again as shown in Figure 1 and Figure 2, working principle of the present invention is as follows:
Under normal circumstances, diesel oil enters oil pressure chamber 51 by filler opening 52, and high-pressure natural gas enters pressure regulation air-inlet cavity 12 by pressure regulation suction port 14, and due to the neck 32 of spool 3 and the sealing cut-off effect of valve body 1 inner split ring 11, rock gas cannot enter burning for air cavity 13.When the pressure in oil pressure chamber 51 is greater than the pressure burnt for air cavity 13, the compressive force overcoming valve block displacement Regulation spring 7 is pushed away movable valve block 4 to left movement by diesel pressure, valve block 4 moves after a segment distance and encounters spool 3, and formed with the end 31 of spool 3 and seal, now diesel pressure also needs the compressive force overcoming spool travel Regulation spring 6 to push away movable valve block 4 together with spool 3 to left movement, once spool 3 is to left movement, sealing surface between spool 3 neck 32 and valve body 1 is destroyed, high-pressure gas in pressure regulation air-inlet cavity 12 enters burning for air cavity 13, burning raises rapidly for the pressure of air cavity 13.When being just greater than oil pressure chamber 51 pressure when burning for the pressure of air cavity 13 and the compressive force sum of spool travel Regulation spring 6 and displacement of valve rod Regulation spring 7, spool 3 and valve block 4 have moved right, and again form sealing between spool 3 and valve body 1.Rock gas after pressure regulation enters engine combustion by burning air supply opening 15, because burning is for the continuous consumption of rock gas in air cavity 13, burning can be less than the pressure in oil pressure chamber 51 again for the pressure of air cavity 13 and the compressive force sum of spool travel Regulation spring 6 and displacement of valve rod Regulation spring 7, spool 3 and valve block 4 are to left movement, sealing surface between spool 3 and valve body 1 is destroyed, high-pressure gas in pressure regulation air-inlet cavity 12 enters burning again for air cavity 13, and burning raises for the pressure of air cavity 13.So move in circles, oil pressure chamber 51 pressure, burning supply the pressure initiation transient equiliblium of air cavity 13 pressure, spool travel Regulation spring 6 and displacement of valve rod Regulation spring 7.
Macroscopically, burning equals the pressure in oil pressure chamber 51 for the pressure of air cavity 13 and the compressive force sum of spool travel Regulation spring 6 and displacement of valve rod Regulation spring 7, pressure when oil pressure chamber 51 raises and when being less than the pressure of pressure regulation air-inlet cavity 12, burning and supply the pressure of air cavity 13 also to increase.When the pressure in oil pressure chamber 51 reduces, under the effect of burning for air cavity 13 pressure and spool travel Regulation spring 6, displacement of valve rod Regulation spring 7 compressive force, spool 3 and valve block 4 move right, and formed and seal between spool 3 and valve body 1.If burning is still greater than oil pressure chamber 51 pressure for air cavity 13 pressure and displacement of valve rod Regulation spring 7 compressive force sum, valve block 4 continues to move right, and the sealing between spool 3 and valve block 4 is destroyed; Burning enters pressure-releasing chamber 43 for the high-pressure gas in air cavity 13 by the internal channel 42 of valve block 4 inside, and gushes via pressure relief opening 16, and burning reduces rapidly for the pressure of air cavity 13.After burning supplies the pressure of air cavity 13 and displacement of valve rod Regulation spring 7 compressive force sum is less than the pressure in oil pressure chamber 51, valve block 4, to left movement, forms sealing between spool 3 and valve block 4 again, thus reaches the effect reducing and burn for pressure in air cavity 13.Due to the position-limiting action of block 17, valve block 4 moves right at most and contacts to block 17.
In sum, the present invention can regulate gas pressure in real time according to diesel pressure, make gas pressure can meet motor actual conditions demand and change according to the change of operating mode, thus power character, the Economy of motor can be improved, and being conducive to the emission performance optimizing motor.
The foregoing is only the schematic embodiment of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.
Claims (7)
1. duel fuel engine pressure regulator, comprise the valve body with through chamber, it is characterized in that: in described valve body, one end sealing is provided with valve seat, slide axially inside described valve seat and be provided with spool, described spool fit inside is provided with valve block, and the outer circumferential face of described valve block and the inner peripheral surface of described valve body are sealed and matched; In described valve body, the other end sealing is provided with end cap, and be arranged with oil pressure chamber in the interior edge face of described end cap, the exterior edge face of described end cap is provided with the filler opening being communicated with described oil pressure chamber; Described chamber is projecting inward is provided with spacer ring, and the neck of described spool and described spacer ring are sealed and matched and define the pressure regulation air-inlet cavity and the confession air cavity that burns that lay respectively at described spacer ring both sides; Described valve block is provided with and is communicated with the pressure release passage of described burning for air cavity, and the top of described spool coordinates with the inlet seal of described pressure release passage; The outer surface of described valve body is respectively equipped with the pressure regulation suction port, burning air supply opening and the pressure relief opening that are communicated with described pressure regulation air-inlet cavity, described burning confession air cavity and described pressure release passage; Be provided with spool travel pressure regulator between described spool and described valve seat, between described valve block and described valve body, be provided with valve block displacement and pressure controlling device.
2. duel fuel engine pressure regulator as claimed in claim 1, it is characterized in that: described spool travel pressure regulator comprises the valve core rod that described spool bottom is provided with, the guiding groove be slidably matched with described valve core rod is provided with inside described valve seat, described valve core rod is arranged with spool travel Regulation spring, the two ends of described spool travel Regulation spring are resisted against the bottom with described spool inside described valve seat respectively.
3. duel fuel engine pressure regulator as claimed in claim 2, it is characterized in that: described valve seat outer circumferential face is provided with screw thread, described valve seat and described valve body screw thread are tightly connected.
4. duel fuel engine pressure regulator as claimed in claim 1, it is characterized in that: described valve block displacement and pressure controlling device comprises the valve block bar that described valve block is provided with away from one end of described spool, described valve block bar stretches in described oil pressure chamber, and the top of described valve block bar is provided with baffle plate; Be positioned at described valve block in described valve body and be provided with block away from the side of described spool, described valve block bar is arranged with valve block displacement Regulation spring, the two ends of described valve block displacement Regulation spring are resisted against on described block and described baffle plate respectively.
5. duel fuel engine pressure regulator as claimed in claim 4, is characterized in that: described valve block bar passes described baffle plate and the adjusting nut that has been threaded.
6. duel fuel engine pressure regulator as claimed in claim 1, is characterized in that: be provided with seal ring between the outer circumferential face of described valve block and the inner peripheral surface of described valve body.
7. the duel fuel engine pressure regulator as described in any one of claim 1 to 6 claim, it is characterized in that: described pressure release passage comprises the internal channel being located at described valve block inside and the pressure-releasing chamber be located on described valve block outer circumferential face, and described pressure-releasing chamber is connected with described pressure relief opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044606.XA CN104595530B (en) | 2015-01-27 | 2015-01-27 | Pressure-regulating device for dual-fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044606.XA CN104595530B (en) | 2015-01-27 | 2015-01-27 | Pressure-regulating device for dual-fuel engine |
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| Publication Number | Publication Date |
|---|---|
| CN104595530A true CN104595530A (en) | 2015-05-06 |
| CN104595530B CN104595530B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510044606.XA Active CN104595530B (en) | 2015-01-27 | 2015-01-27 | Pressure-regulating device for dual-fuel engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620223A (en) * | 2018-05-02 | 2018-10-09 | 陈晓娜 | A kind of log splitter with pressure-regulating device |
| CN109519589A (en) * | 2018-12-13 | 2019-03-26 | 英嘉动力科技无锡有限公司 | A kind of novel pressure regulating valve structure |
| CN113719360A (en) * | 2021-08-25 | 2021-11-30 | 一汽解放汽车有限公司 | Supply pressure adjusting device |
| WO2023147654A1 (en) * | 2022-02-01 | 2023-08-10 | Westport Fuel Systems Canada Inc. | Differential pressure regulator |
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| CN88102464A (en) * | 1987-04-29 | 1988-11-30 | 克劳德·阿兰·格拉茨马勒 | Hydraulic three-way valve |
| JPH04262950A (en) * | 1990-09-26 | 1992-09-18 | Robert Bosch Gmbh | Pressure limiting valve |
| EP0942346A1 (en) * | 1998-03-13 | 1999-09-15 | Industrie Mecanique pour les Fluides | Three-way pressure control valve |
| CN202418777U (en) * | 2012-02-14 | 2012-09-05 | 罗达莱克斯阀门(上海)有限公司 | Pressure regulator for gas supply system of natural gas vehicle engine |
| CN204083399U (en) * | 2014-10-23 | 2015-01-07 | 潍坊力创电子科技有限公司 | Dual Drive gas spray valve |
| CN204420205U (en) * | 2015-01-27 | 2015-06-24 | 潍柴西港新能源动力有限公司 | Duel fuel engine pressure regulator |
-
2015
- 2015-01-27 CN CN201510044606.XA patent/CN104595530B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88102464A (en) * | 1987-04-29 | 1988-11-30 | 克劳德·阿兰·格拉茨马勒 | Hydraulic three-way valve |
| JPH04262950A (en) * | 1990-09-26 | 1992-09-18 | Robert Bosch Gmbh | Pressure limiting valve |
| EP0942346A1 (en) * | 1998-03-13 | 1999-09-15 | Industrie Mecanique pour les Fluides | Three-way pressure control valve |
| CN202418777U (en) * | 2012-02-14 | 2012-09-05 | 罗达莱克斯阀门(上海)有限公司 | Pressure regulator for gas supply system of natural gas vehicle engine |
| CN204083399U (en) * | 2014-10-23 | 2015-01-07 | 潍坊力创电子科技有限公司 | Dual Drive gas spray valve |
| CN204420205U (en) * | 2015-01-27 | 2015-06-24 | 潍柴西港新能源动力有限公司 | Duel fuel engine pressure regulator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620223A (en) * | 2018-05-02 | 2018-10-09 | 陈晓娜 | A kind of log splitter with pressure-regulating device |
| CN108620223B (en) * | 2018-05-02 | 2020-10-02 | 嘉兴市明达生物能源有限公司 | Take pressure regulating device's wood crusher |
| CN109519589A (en) * | 2018-12-13 | 2019-03-26 | 英嘉动力科技无锡有限公司 | A kind of novel pressure regulating valve structure |
| CN113719360A (en) * | 2021-08-25 | 2021-11-30 | 一汽解放汽车有限公司 | Supply pressure adjusting device |
| WO2023147654A1 (en) * | 2022-02-01 | 2023-08-10 | Westport Fuel Systems Canada Inc. | Differential pressure regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104595530B (en) | 2017-02-08 |
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