CN104033729A - Pressure stabilizing device and method for vehicle-mounted liquefied gas cylinder - Google Patents
Pressure stabilizing device and method for vehicle-mounted liquefied gas cylinder Download PDFInfo
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- CN104033729A CN104033729A CN201410278748.8A CN201410278748A CN104033729A CN 104033729 A CN104033729 A CN 104033729A CN 201410278748 A CN201410278748 A CN 201410278748A CN 104033729 A CN104033729 A CN 104033729A
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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
Abstract
The invention relates to a liquefied gas pressure stabilizing device and a pressure-stabilizing control method thereof and particularly relates to a pressure stabilizing device for a vehicle-mounted liquefied gas cylinder. The pressure stabilizing device comprises a plurality of safety valves and a plurality of electromagnetic valves, wherein each electromagnetic valve is connected with each vehicle-mounted gas cylinder after being connected with each safety valve in parallel, the other end of each electromagnetic valve is connected with a gas storage tank, and the gas storage tank is connected with a gas storage tank safety valve and a storage tank exhausting electromagnetic valve, respectively; the vehicle-mounted gas cylinders are further connected with a liquefying heater, the liquefying heater is connected with an engine gas pressure stabilizing valve after being connected with the storage tank exhausting electromagnetic valve in parallel, and the engine gas pressure stabilizing valve is connected with an engine. According to a pressure stabilizing device and method for a vehicle-mounted liquefied gas cylinder, different starting pressures are set for the electromagnetic valves in different states of a vehicle, evaporated natural gas is stored and recycled in a stopping state of the vehicle by virtue of the gas storage tank, the gas is no longer discharged through the safety valves, and the supply gas pressures of the gas cylinders are stabilized, so that the purposes of energy saving, environmental friendliness and safety are achieved.
Description
Technical field
The present invention relates to a kind of liquid gas stable-pressure device and voltage stabilizing controlling method thereof, be specially vehicle-mounted liquefied gas bottle stable-pressure device and method for stabilizing voltage thereof.
Background technique
The gas cylinder of vehicle liquefied natural gas adopts high vacuum insulation Thermo Isolation Technique, guarantees gas cylinder few heat of leaking as far as possible.And leakage heat can not definitely be avoided, leaking heat can make a bottle interior fluid temperature raise and part generation gasification, cause storage pressure to raise, in the time of Vehicle Driving Cycle, can automatically this portion gas preferentially be burnt, and when vehicle lay-off, in order to ensure safety, can only passively emit by the safety valve on bottle, this discharge can cause energy waste, befouling environment and fire hidden danger.
On the other hand, because of in Vehicle Driving Cycle process in gas cylinder natural gas liquids by stop valve, one-way valve, gasifying heater and pressure maintaining valve etc. for motor provide with press rock gas, gas cylinder internal pressure is because of often variation of a variety of causes, and unsettled supply gas pressure can affect the combustion efficiency of motor greatly.Prior art is adopted with the following method storage pressure is carried out to voltage stabilizing for this reason: (1) is when pressure of the inside of a bottle raises while exceeding certain value, economic valve is opened, gas in bottle is mixed into motor air feed by one-way valve and original liquid part, play decompression, after pressure of the inside of a bottle reduces, automatically close through Ji valve.(2) when pressure of the inside of a bottle is during lower than certain value, pressure charging valve is opened, and partially liq natural gas via pressure charging valve and supercharging vaporizer heat rock gas to be back to gas cylinder air chamber, are gas cylinder supercharging.
The subject matter of prior art natural gas gasifying discharge vaporization problem, also exists the unstable problem of storage pressure during vehicle lay-off except aforementioned during vehicle lay-off.Its main cause is that economic valve and pressure charging valve are extremely worked under rugged environment in ultralow temperature etc., in addition in natural gas liquids, also can contain micro-solid particle polluter, often cause economic valve or pressure charging valve sometimes because of spring failure, freeze, foreign matter is main etc. causes the valve cannot be by opened by pressure being set originally or closing, cause storage pressure shakiness, vehicle air feed shakiness, when serious, even cause vehicle to cast anchor, the above fault of vehicle-mounted natural gas cylinder 50% is relevant therewith according to statistics.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of vehicle-mounted liquefied gas bottle stable-pressure device and method for stabilizing voltage thereof, concrete technological scheme is:
Vehicle-mounted liquefied gas bottle stable-pressure device, comprise multiple safety valves, also comprise multiple solenoid valves, each solenoid valve and safety valve and connect after, be connected with each mounted gas cylinder, joint is also provided with storage pressure sensor again, and the solenoid valve the other end is connected with gas holder, solenoid valve is by pressure controller control, and pressure controller is connected with gas holder pressure transducer; Gas holder is connected with gas holder safety valve, storage tank exhaust solenoid valve respectively; Mounted gas cylinder is also connected with evaporating heater, evaporating heater with after the parallel connection of storage tank exhaust solenoid valve, be connected with motor use gas pressure maintaining valve, motor use gas pressure maintaining valve is connected with motor.
Pressure controller is the intelligent pressure control gear such as vehicle-mounted liquid level, pressure instrument.
Because having certain high-temperature gas in gas holder during parking, in the time of vehicle initial start-up, because the water temperature of evaporating heater is low, liquid natural gas is carried out not anxious gasification, by normal temperature gas holder air feed, can eliminate unstable the wait motor accident of the north while using Natural gas vehicles cold car to start.
The present invention controls in the following manner:
Following each pressure is set: the minimum authorized pressure P5 of solenoid valve cracking pressure P2 > Vehicle Driving Cycle state solenoid valve pressure release cracking pressure P3 > storage tank exhaust solenoid valve cracking pressure P4 > mounted gas cylinder when discharge of safety valve pressure P 1> vehicle is stopped transport;
It is 1.59-1.99MPa that discharge of safety valve pressure P 1 arranges scope, when vehicle is stopped transport, solenoid valve cracking pressure P2 is 1.50-1.90MPa, Vehicle Driving Cycle state safety valve pressure release cracking pressure P3 is 0.4-1.0MPA, storage tank exhaust solenoid valve 5 cracking pressure P4 are set to 035-0.95MPA, and it is that supercharging cracking pressure P5 is 0.30-0.90MPA that the minimum authorized pressure of mounted gas cylinder is set.
Travel condition of vehicle, level pressure solenoid valve cracking pressure is set to safety valve pressure release cracking pressure P3, when the pressure in mounted gas cylinder is greater than P3, solenoid valve is opened, pressure releasing high in mounted gas cylinder in gas holder, when mounted gas cylinder internal pressure drops to below P3, shut electromagnetic valve;
Meanwhile, when the pressure in gas holder is during higher than storage tank exhaust solenoid valve cracking pressure P4, open storage tank exhaust solenoid valve, Exhaust Gas is for motor; When gas holder internal pressure drops to below P4, close storage tank exhaust solenoid valve, make gas holder pressure allow minimum pressure P5 higher than mounted gas cylinder, the gas in gas holder is for using to mounted gas cylinder supercharging;
When mounted gas cylinder internal pressure is reduced to below P5, opens solenoid valve again, the gas backstreaming having heated up in gas holder, in mounted gas cylinder, when mounted gas cylinder internal pressure goes back up to shut electromagnetic valve while being greater than P5, has realized mounted gas cylinder bi-directional voltage stabilizing;
At vehicle shut down condition, when vehicle is stopped transport, solenoid valve cracking pressure is P2, and in the time that vehicle stops using that the long period, mounted gas cylinder internal pressure was progressively elevated to P2, solenoid valve is opened gas discharging is stored in gas holder, and safety valve is not opened; When mounted gas cylinder pressure is during lower than P2, closed electromagnetic valve; Not take-off in time as malfunctioning in solenoid valve, safety valve is opened.
Vehicle-mounted liquefied gas bottle stable-pressure device provided by the invention and method for stabilizing voltage thereof, solenoid valve is provided with different breakout pressures at vehicle different conditions, utilize the rock gas of gas holder in the storage of vehicle lay-off state, recycling evaporation, no longer this portion gas is discharged to waste by safety valve, in the time of Vehicle Driving Cycle, stablize gas cylinder supply gas pressure, finally reach energy-saving and environmental protection and safe object.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Accompanying drawings the specific embodiment of the present invention, as shown in Figure 1, gas cylinder voltage stabilizing and the recovering device of vehicle liquefied natural gas, comprise multiple safety valves 7, it is characterized in that, also comprise multiple solenoid valves 3, each solenoid valve 3 is with safety valve 7 and after connecting, then is connected with each mounted gas cylinder 8, joint is also provided with storage pressure sensor 6, solenoid valve 3 the other ends are connected with gas holder 1, and solenoid valve 3 is controlled by pressure controller 4, and pressure controller 4 is connected with gas holder pressure transducer 16; Gas holder 1 is connected with gas holder safety valve 2, storage tank exhaust solenoid valve 5 respectively; Mounted gas cylinder 8 is also connected with evaporating heater 12, after evaporating heater 12 is in parallel with storage tank exhaust solenoid valve 5, is connected with motor use gas pressure maintaining valve 15, and motor use gas pressure maintaining valve 15 is connected with motor 13.
Control procedure is:
Following force value is set: solenoid valve 3 cracking pressure P2 > Vehicle Driving Cycle state safety valve 7 pressure release cracking pressure P3 > storage tank exhaust solenoid valve 5 cracking pressure P4 > mounted gas cylinder 8 minimum authorized pressure P5 when safety valve 7 relieving pressure P1> vehicles are stopped transport.
Travel condition of vehicle, level pressure solenoid valve 3 cracking pressures are set to safety valve 7 pressure release cracking pressure P3, when the pressure in mounted gas cylinder 8 is greater than P3, solenoid valve 3 is opened, the interior high pressure releasing of mounted gas cylinder 8 in gas holder 1, when mounted gas cylinder 8 internal pressures drop to below P3, shut electromagnetic valve 3;
Meanwhile, when the pressure in gas holder 1 is during higher than storage tank exhaust solenoid valve 5 cracking pressure P4, open storage tank exhaust solenoid valve 5, Exhaust Gas is for motor 13; When gas holder 1 internal pressure drops to below P4, close storage tank exhaust solenoid valve 5, make gas holder 1 pressure allow minimum pressure P5 higher than mounted gas cylinder 8, the gas in gas holder 1 is for to mounted gas cylinder, 8 superchargings are used;
When mounted gas cylinder 8 internal pressures are reduced to below P5, opens solenoid valve 3 again, the gas backstreaming having heated up in gas holder 1 is in mounted gas cylinder 8, because the interior gas temperature of gas holder 1 and pressure are all higher than mounted gas cylinder 8 inside temperatures and pressure, realize in external increasing gas and bottle and heat the dual tonifying Qi effect of gasifying, when mounted gas cylinder 8 internal pressures go back up to shut electromagnetic valve 3 while being greater than P5, mounted gas cylinder 8 bi-directional voltage stabilizings are so just realized.
At vehicle shut down condition, when vehicle is stopped transport, solenoid valve 3 cracking pressures are P2, and in the time that inactive long period mounted gas cylinder 8 internal pressures of vehicle are progressively elevated to P2, solenoid valve 3 is opened gas discharging is stored in gas holder 1, and safety valve 7 is not opened; When mounted gas cylinder 8 pressure are during lower than P2, solenoid valve 3 cuts out; Not take-off in time as malfunctioning in solenoid valve 3, safety valve 7 is opened.
Claims (2)
1. vehicle-mounted liquefied gas bottle stable-pressure device, comprise multiple safety valves (7), it is characterized in that, also comprise multiple solenoid valves (3), each solenoid valve (3) and safety valve (7) and connect after, then be connected with each mounted gas cylinder (8), joint is also provided with storage pressure sensor (6), solenoid valve (3) the other end is connected with gas holder (1), and solenoid valve (3) is controlled by pressure controller (4), and pressure controller (4) is connected with gas holder pressure transducer 16; Gas holder (1) is connected with gas holder safety valve (2), storage tank exhaust solenoid valve (5) respectively; Mounted gas cylinder (8) is also connected with evaporating heater (12), after evaporating heater (12) is in parallel with storage tank exhaust solenoid valve (5), is connected with motor use gas pressure maintaining valve (15), and motor use gas pressure maintaining valve (15) is connected with motor (13).
2. vehicle-mounted liquefied gas bottle method for stabilizing voltage according to claim 1, is characterized in that:
Following each pressure is set: the minimum authorized pressure P5 of solenoid valve (3) cracking pressure P2 > Vehicle Driving Cycle state safety valve (7) pressure release cracking pressure P3 > storage tank exhaust solenoid valve (5) cracking pressure P4 > mounted gas cylinder (8) when safety valve (7) relieving pressure P1> vehicle is stopped transport;
Travel condition of vehicle, level pressure solenoid valve (3) cracking pressure is set to safety valve (7) pressure release cracking pressure P3, when pressure in mounted gas cylinder (8) is greater than P3, solenoid valve (3) is opened, pressure releasing high in mounted gas cylinder (8) is in gas holder (1), when mounted gas cylinder (8) internal pressure drops to below P3, shut electromagnetic valve (3);
Meanwhile, when the pressure in gas holder (1) is during higher than storage tank exhaust solenoid valve (5) cracking pressure P4, open storage tank exhaust solenoid valve (5), Exhaust Gas is for motor (13); When gas holder (1) internal pressure drops to below P4, close storage tank exhaust solenoid valve (5), make gas holder (1) pressure allow minimum pressure P5 higher than mounted gas cylinder (8), the gas in gas holder (1) is for using to mounted gas cylinder (8) supercharging;
When mounted gas cylinder (8) internal pressure is reduced to below P5, opens solenoid valve (3) again, the gas backstreaming having heated up in gas holder (1) is in mounted gas cylinder (8), when mounted gas cylinder (8) internal pressure goes back up to shut electromagnetic valve (3) while being greater than P5, realize mounted gas cylinder (8) bi-directional voltage stabilizing;
At vehicle shut down condition, when vehicle is stopped transport, solenoid valve (3) cracking pressure is P2, in the time that inactive long period mounted gas cylinder (8) internal pressure of vehicle is progressively elevated to P2, solenoid valve (3) is opened gas discharging is stored in gas holder (1), and safety valve (7) is not opened; When mounted gas cylinder (8) pressure is during lower than P2, solenoid valve (3) cuts out; Not take-off in time as malfunctioning in solenoid valve (3), safety valve (7) is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410278748.8A CN104033729B (en) | 2014-06-21 | 2014-06-21 | Vehicle-mounted liquefied gas bottle stable-pressure device and method for stabilizing voltage thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410278748.8A CN104033729B (en) | 2014-06-21 | 2014-06-21 | Vehicle-mounted liquefied gas bottle stable-pressure device and method for stabilizing voltage thereof |
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| CN104033729A true CN104033729A (en) | 2014-09-10 |
| CN104033729B CN104033729B (en) | 2016-03-09 |
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| CN201410278748.8A Active CN104033729B (en) | 2014-06-21 | 2014-06-21 | Vehicle-mounted liquefied gas bottle stable-pressure device and method for stabilizing voltage thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500971A (en) * | 2014-12-25 | 2015-04-08 | 十堰厚发汽车零部件有限公司 | LNG (Liquefied Natural Gas) vehicle-mounted gas cylinder system capable of automatically supercharging |
| CN104654008A (en) * | 2015-02-04 | 2015-05-27 | 中材科技（苏州）有限公司 | Recycle device for LNG (Liquefied Natural Gas) tank overpressure discharge and implementation method thereof |
| CN104676244A (en) * | 2015-02-11 | 2015-06-03 | 郑州宇通客车股份有限公司 | Vehicle fuel gas recycling and supplying device |
| CN109630875A (en) * | 2017-10-09 | 2019-04-16 | 张家港中集圣达因低温装备有限公司 | Liquefied gas bottle releasing pressure automatically system and liquified gas automobile |
| CN113669621A (en) * | 2021-08-17 | 2021-11-19 | 北京福田戴姆勒汽车有限公司 | Liquefied natural gas recovery control system and vehicle |
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| CN201953512U (en) * | 2011-01-30 | 2011-08-31 | 徐工集团工程机械股份有限公司科技分公司 | Liquefied natural gas supply device used for loading machine |
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| KR20130035058A (en) * | 2011-09-29 | 2013-04-08 | 삼성중공업 주식회사 | System and method for fuel gas supply |
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Patent Citations (6)
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| US20090320781A1 (en) * | 2008-06-26 | 2009-12-31 | Hyundai Motor Company | Lng fuel supply system |
| JP2010144878A (en) * | 2008-12-19 | 2010-07-01 | Ud Trucks Corp | Fuel storage device for lng vehicle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500971A (en) * | 2014-12-25 | 2015-04-08 | 十堰厚发汽车零部件有限公司 | LNG (Liquefied Natural Gas) vehicle-mounted gas cylinder system capable of automatically supercharging |
| CN104654008A (en) * | 2015-02-04 | 2015-05-27 | 中材科技（苏州）有限公司 | Recycle device for LNG (Liquefied Natural Gas) tank overpressure discharge and implementation method thereof |
| CN104676244A (en) * | 2015-02-11 | 2015-06-03 | 郑州宇通客车股份有限公司 | Vehicle fuel gas recycling and supplying device |
| CN109630875A (en) * | 2017-10-09 | 2019-04-16 | 张家港中集圣达因低温装备有限公司 | Liquefied gas bottle releasing pressure automatically system and liquified gas automobile |
| CN113669621A (en) * | 2021-08-17 | 2021-11-19 | 北京福田戴姆勒汽车有限公司 | Liquefied natural gas recovery control system and vehicle |
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| Publication number | Publication date |
|---|---|
| CN104033729B (en) | 2016-03-09 |
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Effective date of registration: 20180604 Address after: 210008 room 3147, Ning six road, chemical industrial park, Liuhe District, Nanjing, Jiangsu, China, 3147 Patentee after: Nanjing Yi Jie environmental protection technology Co., Ltd. Address before: 063200 Tangshan City, Hebei province Caofeidian District, Tang Hai Town, Xinli District, well off West 195. Patentee before: Liu Yintong |