163 results about "Natural gas vehicle" patented technology

A low consumption and intelligent safe gas-supply system for gas tanks comprises: at least two gas tanks and gas tank valves installed on them, charge valves with check valve, at least two gas-filled parallel unit pipes, high-pressure sensor, at least two gas-supply parallel unit pipes, gas-supply main conduit, reset pressure sensor, at least two solenoid valves with check valve, and electronic control module ECM. The invention has the characteristics such as the gas tanks supply gas in sequence, intelligent control, security and reliability for use, low consumption, high display precision for gas volume, decompression transfinite alarm and convenience for installing, use and maintenance etc., and it can be used in the vehicle hydrogen supply system in the fuel cell vehicles or the vehicle compressed natural gas-supply system in the natural gas vehicles, and also the high-pressure hydrogen or natural gas-supply system for gas tanks on the ground.

The invention relates to a high-performance natural gas vehicle tail-gas clean-up catalyst and preparation method thereof, wherein the catalyst has higher catalytic conversion performance to CO, HC, NOx, especially capable of effectively conversing methane at low temperature. The catalyst comprises a first carrier, a second carrier on the first carrier and active components, characterized in that: the second carrier comprises a molecular sieve modified by the metal oxides and cerium zirconium solid solution; the active components comprise two or three kinds of noble metal platinum, palladium and rhodium. The first carrier is cordierite ceramic honeycomb carrier and the second carrier loads and the cerium, zirconium solid solution loaded with one or more than one noble metal selected from the platinum, palladium and rhodium is used as the first layer load on the cordierite ceramic honeycomb carrier and the molecular sieve modified by the metal oxide and loaded with one or more than one noble metal selected from the platinum, palladium and rhodium is used as the second layer load on the first load.

The present invention relates to a metal nozzle boss provided with a sealing device, which has highly improved tightness and is combined with a plastic liner of a composite vessel used as a high-pressure vessel. The metal nozzle boss uses an elastic seal ring and a tightening piece in the plastic liner, so that the nozzle boss reliably seals the junction of the nozzle boss and the liner and prevents gas leakage from the vessel. The blade part of the nozzle boss has a dovetail-shaped locking groove, with locking ridges formed in the locking groove. Thus, when the plastic liner is produced by injecting molten resin into the locking groove, the plastic liner is securely combined with the metal nozzle boss. The composite vessel having the metal nozzle boss can be used as a fuel tank for natural gas vehicles or a hydrogen tank for fuel cell vehicles.

A liquefied natural gas system for a natural gas vehicle engine with flow driven by the engine includes dual flow paths through at least one heat exchanger. A return path extends from the dual flow paths to the storage tank, and an engine feed path extends from the dual flow paths configured to couple to the engine. A valve and control system are coupled to the dual flow paths capable of alternating flow through the dual flow paths so that one flow path supplies the engine through the engine feed path while the other flow path pressurizes the storage tank through the return path.

An auxiliary or supplemental vehicle heating system that operates on natural gas or propane is provided for use with a vehicle engine having a liquid cooling / heating circuit. A propane- or natural gas-fired burner supplies heat during the operation or non-operation of the engine and the heat produced is used to supply heat to the engine, passenger compartment(s), mobile work areas, cargo containers and in the case of natural gas vehicles, provide heat to the on-board fuel system regulator. Thus, the auxiliary or supplemental heating system supplies heat independent of the engine's liquid cooling / heating circuit. In some embodiments, the cooling / heating circuit uses the heat produced from the natural gas or propane auxiliary heating system to supply heat to the engine via a heat exchanger.

The invention relates to a Fe molecular sieve composite catalyst, which comprises an active component Fe, a catalyst carrier Beta and a mordenite. A preparation method comprises the following steps of: 1, performing ion exchange on a Si / Al H-Beta molecular sieve and FeCl2; 2, removing Cl ions in the solution, and drying the obtained filter cake and roasting the filter cake in a muffle furnace to obtain the Fe / Beta molecular sieve catalyst; 3, placing the Fe / Beta molecular sieve catalyst in the water, adding the mordenite, and roasting the mixture to obtain the Fe / Beta / Mor molecular sieve composite catalyst; 4, dissolving the Fe / Beta / Mor molecular sieve into the de-ionized water, and adding concentrated nitric acid to obtain coating serum; and 5, dipping a Cordierite honeycomb ceramic carrier in the serum, blowing a residual liquid, and after drying the mixture in the shade, drying and roasting the mixture. The catalyst can efficiently purify NOx in the tail gas of a diesel vehicle, a lean-burning gasoline car and a lean-burning natural gas vehicle, and has the characteristics of environment protection and highly efficient catalytic activity.

A liquefied natural gas system for a natural gas vehicle engine with flow driven by the engine includes dual flow paths through at least one heat exchanger. A return path extends from the dual flow paths to the storage tank, and an engine feed path extends from the dual flow paths configured to couple to the engine. A valve and control system are coupled to the dual flow paths capable of alternating flow through the dual flow paths so that one flow path supplies the engine through the engine feed path while the other flow path pressurizes the storage tank through the return path.

The invention relates to a self-adaptive correction method for differences of fuel compositions of a natural gas engine. According to the method, on the basis of closed-loop control of mixed gas concentration, feedback parameters of closed-loop control of the mixed gas concentration serve as input of the self-adaption function, unidirectional control deviation existing for a long time serves as an independent correction in a self-adaption mode for adjusting gas feeding of the target fuel amount, and finally the closed-loop control parameters can be basically maintained at the original value level all the time. Firstly, working condition areas activating the self-adaptive algorithms are divided according to the rotation speed of the engine and the load conditions, then self-learning is carried out according to the feedback parameters of closed-loop control of the mixed gas concentration Lambda selected by the different working condition areas, and finally self-adaptive correction is carried out on the differences of the fuel compositions of the natural gas engine. The appropriate use condition of the engine can be reasonably selected according to the deviation generation mechanism of the mixed gas concentration, the running range of natural gas vehicles is expanded, and the running quality of the vehicles is improved.

The invention discloses a natural gas vehicle gas wireless monitoring controller based on CC2530 and a control method thereof. The natural gas vehicle gas wireless monitoring controller comprises a gas wireless control valve node, a wireless coordinator node and N wireless monitoring nodes, wherein N is at least 1; every wireless monitoring node of the N wireless monitoring nodes comprises a gas sensor, an ADC (Analog to Digital Converter) module, a microprocessor and a wireless communication module; the gas wireless control valve node comprises a microprocessor, a wireless communication module and a gas control valve; the wireless coordinator node comprises a coordinator master control unit, an LCD (Liquid Crystal Display), a data storage, a sound and light alarm module and a wireless communication module; and the LCD, the data storage, the sound and light alarm module and the wireless communication module are connected with the coordinator master control unit respectively. According to the natural gas vehicle gas wireless monitoring controller based on the CC2530 and the control method thereof, detection and monitoring need to be performed on a plurality of vehicle sensitive points which are easy to cause gas leakage according to actual situations of a natural gas vehicle, so that real-time detection, early warning and control on natural gas concentration inside the natural gas vehicle can be achieved.

The invention provides systems and methods for regulating, monitoring and controlling fuel distribution in a fuel system. Some embodiments provide systems and methods for regulating fuel distribution in an alternative fuel system, such as a natural gas vehicle fuel system. The fuel distribution may be regulated mechanically, electronically, or a combination thereof. In some embodiments, the fuel distribution can be regulated by a regulator for high pressure operation with a bypass path for low pressure operation.

The present invention provides a CNG time fill system, comprising a compression system including a gas dryer and one or more gas compressors, a gas storage system for storing the natural gas, a manifold time fill system for filling a plurality of natural gas vehicles with the natural gas, a pressure transducer or pressure transmitter for detecting the pressure within the manifold time fill system, and an automatic shut off valve for selectively stopping the flow of gas into the manifold time fill system.

The invention discloses a catalytic converter for purifying exhaust of a natural gas automobile, which comprises a front catalyst and a rear catalyst. The exhaust of the natural gas automobile passes through the front catalyst and the rear catalyst at one time so as to meet the emission requirement of the natural gas automobile. By optimizing the combined mode of the front and rear catalysts, the purification efficiency of the catalytic converter can be effectively improved, the noble metal consumption and cost of the catalytic converter are reduced, and the back pressure of the catalytic converter can be effectively reduced by changing a gap between the front catalyst and the rear catalyst. In the front and rear catalysts, cordierite honeycomb ceramic is taken as a carrier, activated alumina, ceria-zirconia solid solution, rare earth oxides, alkaline-earth metal oxides, bonders, and transition metal composite oxides or transition metal rare earth composite oxides as active ingredients are taken as coatings, and platinum group metal active ingredients are impregnated on the coatings. The catalytic converter has high catalytic activity and stability on hydrocarbon compounds, can be used as a catalytic converter for purifying the exhaust of the natural gas engine, and also can be used as a catalytic converter for purifying the exhaust of a motor vehicle which takes gasoline and liquefied petroleum gas as fuel.

It relates to a LNG multi functional station that comprises the storage area, pneumatic area, vehicle gasoline filling and bottling area. It is complete in function, high in equipment utilization rate, compact in structure, saving in land, low in running cost, better solving the emergent gas supply issue, expanded the services in natural gas vehicle filling, and LNG satellite station, bottling serving customers to reduce storage device investment, leading the storage, natural gas vehicle industry in the LNG product chain.

The invention relates to a hydraulic-typed natural gas automobile gas-adding sub-station, comprising a CNG sub-station trailer, a sub-station prizing body, a PLC control cabinet, wind air source equipment, a gas alarm and a gas adding machine; the CNG sub-station trailer is fixed with 8 independent pressure vessels; the front end of each pressure vessel is respectively fixed with a pneumatic air outlet valve and the rear end thereof is respectively fixed with a pneumatic oil inlet valve and a pneumatic oil returning valve in parallel; the pneumatic air outlet valve, the pneumatic oil inlet valve and the pneumatic oil returning valve are respectively communicated with the gas adding machine and the sub-station prizing body by pipelines; the sub-station prizing body comprises a prizing body, a liquid storage tank, a pressurization system, a medium liquid and an exhaust device. The hydraulic-typed natural gas automobile gas-adding sub-station has the advantages of little investment of CNG sub-station construction, high working capacity, high gas yield, low running expense, automatic control, extremely little maintenance, and stable running.

The invention provides a feed gas processing device for natural gases, which comprises a feed gas preseparator, a compressor, a refrigerating separator and a fractionating device which are connected in sequence. The feed gas processing device also comprises a CNG (compressed natural gas) compressor; the refrigerating separator and the fractionating device are respectively provided with a dry gas exhausting pipe; and the CNG (compressed natural gas) compressor is connected with the dry gas exhausting pipe of the refrigerating separator and the dry gas exhausting pipe of the fractionating device. The feed gas processing device is particularly suitable for processing the natural gas incapable of being fed into a gathering pipe network of far oil-gas fields or sporadic oil-gas wells, can greatly reduce investment, and can simultaneously reduce the operating energy consumption during the production process. The liquefied gas and stabilized light dydrocarbon produced by the feed gas processing device can be used as chemical raw materials and industrial or civil fuels; the compressed natural gas can be conveyed to cities and used as fuel for natural gas automobiles to replace gasoline and diesel used by urban automobiles; and the feed gas processing device greatly cleans urban environment, and has excellent economic benefits and social benefits.

For the simple and cost-effective production of a valve component (1) in the form of a non-return valve or a connecting nipple, in particular for the refuelling of natural gas vehicles, or for the pressure-tight connection to a fluid line or a plug-in coupling, wherein the valve component (1) has two housing parts (3, 4) which are connected pressure-tightly to each other and accommodate a valve (7) there within, it is proposed that the housing parts (3, 4) are pressed together at an annular groove (3').

A device consists of monoithic computer, temperature measuring unit on cylinder wall, pressure measuring unit on tube between pressured release valve and gas cylinder, man-machine component and a display. It is featured as connecting output end of the two units to input end of A / D conventer separately for transmitting digital value to monolithic computer.

The invention discloses a catalyst suitable for processing the tail gas of a lean-burn natural gas vehicle and a preparation method thereof. The catalyst is prepared through the following steps of: loading rare earth metal on a carrier gamma-AL2O3, painting precious metal, and drying and calcining carrier gamma-AL2O3 coated with the precious metal, wherein the precious metal is Pt and / or Pd, and the rare earth metal is Zr, Y, La and / or Ce; the weight percentage of the precious metal is 2.0%, wherein the weight ratio of Pt to Pd is (1-0):(0-1); and the weight percentage of the rare earth metal Zr is 10%, the weight percentage of the rare earth metal Y is 0-10%, the weight percentage of the rare earth metal La is 0-10%, and the weight percentage of the rare earth metal Ce is 0-10%. The preparation method of the catalyst, which is disclosed by the invention, has the advantages of simplicity, easiness in controlling the preparation process conditions, and high practicability. Through the detection, the catalyst has favorable CH4 conversion performance, and has a favorable effect in processing the tail gas of lean-burn natural gas vehicles so as to enable the tail gas to meet various corresponding national standards and requirements.

The invention discloses a control method for a compressed natural gas automobile compressed natural gas filling daughter station variable frequency compressor unit. The method comprises the following steps: the entire working condition range of a daughter station compressor is divided into different working condition sections; the optimum operation frequency of each working condition section is determined in advance; when the daughter station compressor works, real-time and periodical collection of gas suction pressure and exhaust pressure are carried out, then the optimum operation frequency in a corresponding working condition section is checked so as to adjust rotating speed of the compressor unit, and ensure the variable frequency compressor unit maintains higher motor operating efficiency within a load range of between 30 and 100 percent, and the motor operating frequency is 2 to 3 percent higher than that of non-reversible operation evenly, and is 7 to 8 percent higher than those of other frequency conversion modes; when gas suction pressure varies, relatively even gas charge can be achieved by adjusting the rotating speed; and the compressor unit can be quickly started without any independent soft starter.

The invention discloses a catalyst for catalytic methane oxidation and a preparation method thereof. The catalyst has a tin-based solid solution hydrolysate coated core-shell structure, the supporter is micro powder of the tin-based solid solution hydrolysate coated core-shell structure, and the core-shell structure is a modified aluminum oxide core-shell structure; the tin-based solid solution is the one doped with rare earth or transition metal, the reaction general formula of the tin-based solid solution is SnxM1-xO2, and in the formula, M is one of the rare earth and the transition metal; x is a coefficient; and the catalyst comprises 10-70 mass percent of tin-based solid solution and the balance of rare earth modified aluminum oxide or alkaline-earth metal modified aluminum oxide. By adopting the tin-based solid solution hydrolysate coated core-shell structure, the consumption of tin rich solid solution is reduced to 10-30%, and the catalyst has excellent thermal stability and low-temperature activity; the raw materials are readily available non-noble metals, so the cost is low; and the catalyst is simple in preparation, has light pollution, facilitates large-scale industrialized production, and is suitable for catalytic oxidation treatment of natural gas automobile exhaust of which the methane concentration is less than 4%.

The invention relates to a preparation method of a lean-burn type natural gas vehicle catalyst. The catalyst has low ignition temperature and high catalyzed oxidation efficiency to methane and belongs to the technical field of catalysis. According to the preparation method, cordierite honeycomb ceramic is used as a carrier, activated aluminium oxide and various salt additives are used as coatings, precious metals of Pt and Pd are used as catalyst activity components, and the catalyst for efficient catalytic oxidation of the methane is prepared by changing a coating formula and a coating process. The preparation method comprises the following steps of: taking and dissolving various salt additives to deionized water, adding the activated aluminium oxide with a certain proportion, stirring and ball-milling, controlling seriflux parameters to prepare coating size, adding precious metal salt to the size in batches according to different loading method of Pt and Pd metals, dipping the cordierite honeycomb ceramic carrier to the size after uniformly stirring, and roasting at a high temperature after drying to obtain the catalyst. Compared with conventional catalyst, the catalyst prepared by the invention has the advantages of simple preparation process, low ignition temperature of the methane, high conversion rate of the methane, low cost, good ageing resistance, and the like.

The invention relates to a control method of idling speed stability of a gaseous propellant engine for automobiles, belonging to the field of internal-combustion engine electronic control. The gaseous propellant engine needs to operate under relatively stable rotating speed in case of idling operation and the idling speed is as low as possible so as to reduce fuel consumption; however, much too low idling speed is prone to facilitate the engine to tremendously wobble. In the invention, idling speed of the gaseous propellant engine is taken as a control objective, a double closed-loop control algorithm is adopted, that is, closed-loop control is carried out on natural gas injection pulse width and bypass air input respectively by PID algorithm; an idling speed double closed-loop test snoopware is adopted to carry out real-time monitoring on the natural gas engine, so as to seek the optimal PID parameter matching and obtain stable idling speed, as a result, automobiles powered by natural gas can be provided with comfortable driving environment in case of idling operation.

The invention discloses high-strength alloy steel for a gas-fueled vehicle gas cylinder and a preparation method of the high-strength alloy steel. The preparation method comprises the following steps of: smelting and continuously casing to obtain target steel billet including the following components in percentage by weight: not more than 0.32% of C, 0.15%-0.35% of Si, 0.35%-0.65% of Mn, 0.70%-1.00% of Cr, 0.15%-0.25% of Mo, not more than 0.010% of P, not more than 0.008% of S, not more than 0.0002% of H, and the balance of Fe and inevitable impurities; heating up the steel billet to 1180 DEG C to 1280 DEG C; roughing the heated steel billet, wherein a five-phase rolling way is adopted, the down rate of the single rolling phase is not lower than 20%; rolling the steel billet in precision, wherein the start-rolling temperature and the final-rolling temperature are controlled to be 990 DEG C to 1040 DEG C and 870 DEG C to 900 DEG C, respectively; cooling the precision-rolled piece to 650 DEG with the cooling speed of 10-30 DEG C / s, and rolling the piece after air cooling. The high-strength alloy steel for the gas-fueled vehicle gas cylinder with yield strength not lower than 835 MPa, tensile strength not lower than 980 MPa, elongation not lower than 14% and ballistic work not less than 47J at -40 DEG C can be obtained by the preparation method disclosed by the invention.

In the present method, cold substances are transferred through a nozzle with moving parts. An insulating boot facilitates the method. The present method is generally suited for use in transferring cryogenic substances such as during the refueling of liquid natural gas vehicles. The present method causes an insulating layer to be created between a removable boot and a nozzle separating the ambient environment from the moving parts of the nozzle, purging the layer with a dry gas such as nitrogen to remove moisture and restricting the incursion of such moisture from the layer and therefore, from the moving parts to avoid freezing up of the moving parts. The layer can also help to avoid freezing up of the abutting interface created between the nozzle and receiving line when the nozzle is removably engaged to a receiving line.

A refueling system for natural gas users (e.g., natural gas vehicles) includes a two-stage compression system that compresses low-pressure gas in a natural gas supply line to compressed natural gas (CNG) pressure for use by a user. A single motor drives both a first stage rotary compressor and a rotary hydraulic pump that powers a second-stage liquid piston compressor. The motor, first stage compressor, and pump may be co-axially aligned. Booster vessels store compressed gas to augment the system's compressed gas delivery flow rate when desired. The booster vessels may be recharged with compressed gas when the system is not delivering gas to a user. Hydraulic liquid may be pumped into and out of the booster vessels during booster vessel discharge and recharge, respectively, to maintain a desired pressure within the vessels.

The invention discloses a nanoscale cerium-zirconium solid solution composite oxide, a preparation method, a catalyst by the adoption of the nanoscale cerium-zirconium solid solution composite oxide and application in equivalent proportion combustion for gas-fueled automobile exhaust gas treatment. The method of the invention comprises the following steps: 1) preparing a reaction solution by the use of cerium salt and zirconium salt, adding a precipitating agent and carrying out a hydrothermal reaction; 2) roasting to obtain the nanoscale cerium-zirconium solid solution composite oxide. The preparation method of the invention is simple and is easy to operate. The obtained cerium-zirconium solid solution composite oxide contains lots of surface oxygen vacancies and is rich in high-concentration trivalent cerium on the surface. By applying the nanoscale cerium-zirconium solid solution composite oxide as a carrier to a catalyst, catalytic performance of the catalyst is enhanced. A Pd / CexZr1-Xo2(x is less than 1 and greater than 0) catalyst formed by using the cerium-zirconium solid solution as a carrier can be used in treatment of gas-fueled automobile exhaust gas or simulated flue gas with complex components, can achieve high-efficiency conversion of CH4 under the conditions of high water and high concentration CO2, and also has high NO and CO conversion efficiency during equivalent proportion combustion.

The invention discloses a water-resistant high-temperature-resistant methane oxidation catalyst and a preparation method thereof. The catalyst is composed of 0.5-5wt% of PdO, 1-10wt% of BaCO3 and 85-98.5wt% of Al2O3, wherein a molar ratio of Al2O3 to BaCO3 is 16.5 to 190.7; a molar ratio of BaCO3 / Al2O3 to PdO is 7.8 to 81.4; a molar ratio of BaCO3 to PdO is 1.25. The preparation method comprises the following steps: (1) dipping a Ba precursor into an Al2O3 material, and performing air roasting to form a BaCO3 / Al2O3 carrier; (2) dipping a Pd precursor onto the carrier prepared in the step (1),performing air drying and roasting, so as to obtain the PdO / BaCO3 / Al2O3 water-resistant high-temperature-resistant methane oxidation catalyst. The methane oxidation catalyst prepared by the method disclosed by the invention has excellent methane catalytic activity and stability in a water-containing atmosphere and a high-temperature environment. The catalyst is applicable to tail gas after-treatment of gas-fueled vehicles and gasoline cars, and can also be used for tail gas purification of burners taking natural gas, coal gas and liquefied petroleum gas as fuel.