39results about How to "Increase the speed of flame spread" patented technology

Disclosed is an elongating arc plasma jet ignition device. A swirler is fixed to the bottom of an inner cavity of a shell; a positive pole is located in the shell and fixedly connected with the swirler; the lower end of an insulation sleeve is installed in a central hole of the swirler, and an air chamber is formed in the gap between the outer peripheral surface of the middle of the insulation sleeve and the inner surface of the shell. A negative pole is embedded on a negative pole installation base, and the arc end of the negative pole extends out of the lower end of the insulation sleeve to be located in the positive pole. An arcing distance 2-8 mm long is kept between the arc end of the negative pole and a nozzle of the positive pole; an air inlet pipe is located at the upper end of the shell and communicated with the space of the air chamber formed between the insulation sleeve and the shell. The taper angle beta of the arc end of the negative pole is 40 degrees. The taper angle alpha of a contraction section of the positive pole is 60-90 degrees. Eight swirling holes with the spiral angle of 45 degrees are evenly distributed in an end surface of the swirler, and work media passing through the swirler generate swirling flow. The elongating arc plasma jet ignition device has the advantages of being high in flame spreading speed, high in penetrating power and rich in active air plasma.

The invention relates to a lean-burn gas duel-fuel spark-ignition-type internal combustion engine based on EGR (Exhaust Gas Recirculation) system and a control method, and can solve the problems of unstable combustion, high NOx emission and the like of a gas fuel spark-ignition-type internal combustion engine caused during lean burn. Based on the in-fuel-gas-cylinder direct injection and inlet duct spray combined duel-fuel spark-ignition-type internal combustion engine technology and the EGR technology, the internal combustion engine and the control method ensure that the duel-fuel spark-ignition-type internal combustion engine can realize stable and efficient lean burn and reduce the phenomena of cyclical variation and fire accident at a high compression ratio; meanwhile, part of exhaust gas is re-guided into the cylinder to participate in combustion, the EGR ratio is changed according to the requirements of working conditions, the in-cylinder combustion temperature is lowered, and the generation of NOx is inhibited; and besides, as lean burn and EGR co-exist, the opening degree of a throttle valve can be increased and the pumping loss is reduced. In conclusion, reduction of energy consumption and super-low emission of pollutants can be fundamentally realized.

The invention aims to provide a natural gas engine combustion organization method with precombustion chamber low-pressure air supply and in-cylinder high-pressure direct injection functions. The natural gas engine combustion organization method is characterized in that a high-pressure gas injecting device is mounted on a cylinder cover, and gas injected at the tail end of compression stroke formsconcentration gradient distribution in a cylinder; a precombustion chamber is positioned right above a main combustion chamber, and a sparking plug is obliquely mounted on the left above the precombustion chamber; a low-pressure one-way air supply valve is mounted at the top of the precombustion chamber and is used for supplying air into the precombustion chamber during the intake stroke, such airand air pushed into the precombustion chamber during the compression stroke form a combustible gas mixture, the combustible gas mixture is ignited by the sparking plug, and flames enter a gas mixturein an ignition cylinder of the main combustion chamber; the air supply pressure of the one-way air supply valve is controlled at 4-6 bar during a low load and at 8-10 bar during a high load. The natural gas engine combustion organization method has the advantages that the ignition stability in different operation conditions can be guaranteed through adjustment of the air supply pressure in the one-way valve, and concentration stratification and rapid combustion of the thin gas mixture in the cylinder are achieved through in-cylinder direct injection, so that an engine is more economical and higher in exhaust performance.

The invention discloses a method and equipment for improving the heat efficiency of an automobile fuel. According to the method, the automobile fuel before entering a cylinder is heated, thus the heat efficiency of the fuel is improved; and in particular, an electromagnetic induction coil is used for heating, the operation is convenient, safe and reliable, and the electromagnetic induction heating efficiency is high. The equipment comprises a heating unit, wherein the heating unit comprises a heating control main board, a power supply acquisition module, a relay and a heating module; the power supply acquisition module, the relay and a heating control unit are sequentially connected, and the heating module is controlled by the heating control main board; the relay is connected with an automobile-mounted storage battery; and the heating module is arranged at an oil rail or an oil nozzle of an automobile oil supply system. The reaction speed and the flame propagation speed of a mixed gas in the cylinder are increased according to the detonation theory of the mixed gas, thus an engine power is improved; and more chemical energy of the fuel is converted to kinetic energy, thus the heat efficiency of the fuel is increased, and the effects of energy conservation and emission reduction are achieved.

The invention aims at providing an engine layered rapid combustion method capable of achieving multi-time natural gas spraying. A system comprises an air inlet way, an exhaust way, a low-pressure natural gas injection valve and a heart-shaped pre-combustion chamber with an inclined outlet (single hole), therefore, a rolling flow, a spark plug, an in-cylinder high-pressure direct injection air injection valve and a main combustion chamber are formed in the air flow, the manner of air inlet way low-pressure injection and in-cylinder high-pressure direct injection is adopted for supplying naturalgas, for different running conditions of an engine, the different proportions of the gas total quantity needed by each cycle in the air inlet way injection and high-pressure direct injection and theair injection rule of an in-cylinder high-pressure direct injection air injection valve are adjusted, the mixed gas concentration layering from thick to thin is formed in the cylinder from a pre-combustion chamber outlet to the exterior, the distribution of the mixed gas from thick to thin is formed nearby the spark plug, and natural gas engine layering rapid combustion is achieved. Natural gas engine ignition stability is ensured, the engine efficiency is improved, and the emissions are reduced.

The invention belongs to the technical field of engines, and particularly relates to a piston for a gas engine and the gas engine with same. The piston comprises a combustion chamber arranged at the top of the piston, wherein the combustion chamber is of a cylindrical cavity shape structure, and the combustion chamber is provided with an inward concave portion extending in a direction away from the axis of the piston. According to the provided piston for the gas engine, the inward concave portion is additionally arranged inside the combustion chamber, so that airflow entering an air cylinder is guided, relatively strong turbulent flow is locally formed, the flame propagation speed is increased, the equivalent gas engine combustion performance is improved, meanwhile, extrusion flow is generated through an asymmetric structure, so that the influence of a part of tumble flow on the vicinity of a spark plug is counteracted, the airflow speed on the vicinity of the spark plug is reduced, and the misfire risk is reduced.

The invention relates to a large-proportion methanol catalytic combustion agent, which belongs to the field of alcohol ether fuel alternative oil additives, and comprises 3-50% of initiator, 4-90% of oxidizer, 1-20% of activating agent, 0.5-10% of cleaning agent, and 2-30% of friction-reducing agent. The large-proportion methanol catalytic combustion agent has the effects of overcoming the cold start of methanol and the difficult self-ignition, and improving the burning rate of the methanol, the power of an engine and the oil conservation. Due to the strong catalytic oxidation and decomposition capability of the catalytic combustion agent, the large-proportion methanol catalytic combustion agent can promote the fast and full combustion of the methanol, improve the carbon deposition of a combustion chamber, play roles of cleaning and lubricating the engine, reduce the abrasion of the engine caused by the combustion of the methanol and reduce the emission of combustion waste gas. The large-proportion methanol catalytic combustion agent has the comprehensive catalytic function and the synergy, and can effectively inhibit metal corrosion and rubber swelling, further enhance and improve the large-proportion methanol catalytic combustion effect, and open a new way of the large-proportion methanol catalytic combustion technology for popularization and application of large-proportion methanol fuels: methanol gasoline, microemulsion alcohol gasoline, methanol bio-gasoline, methanol diesel, microemulsion alcohol diesel, methanol bio-diesel and alcohol-based fuel.

The invention aims to provide an engine capable of directly injecting natural gas for multiple times under high pressure in a cylinder and a layered rapid combustion method thereof. The engine comprises an air cylinder cover, an air cylinder wall, a piston, an air inlet channel, an air inlet valve, an exhaust channel, an exhaust valve, a high-pressure natural gas injection valve, a high-pressure natural gas supply pipeline and a spark plug, wherein the cylinder cover, the cylinder wall and the spark plug form a combustion chamber, the combustion chamber is hemispherical, the air inlet channel,the exhaust channel, the high-pressure natural gas injection valve, the high-pressure natural gas supply pipeline and the spark plug are arranged in the cylinder cover, the high-pressure natural gassupply pipeline is connected with the high-pressure natural gas injection valve, the air inlet valve is arranged in the air inlet channel, the exhaust valve is arranged in the exhaust channel, and thehigh-pressure natural gas injection valve is located between the air inlet channel and the spark plug. The engine is advantaged in that layered combustion of different gradients under different loadscan be achieved, the ignition stability of the natural gas engine is guaranteed, economical efficiency and dynamic property of the engine are effectively improved, and emission is reduced.

The invention provides a swirl combustion chamber of a rotor engine. Two blunt bodies perpendicular to the end face direction are arranged front and back in a concave pit of a wankel rotor in the motion direction of the rotor, the two ends of each blunt body are fixedly connected with the inner end face of the concave pit of the rotor, the section of the front blunt body is composed of a semicircle and a rectangle using the diameter of the semicircle as one edge, the section of the back blunt body is in a semicircle shape, the diameter of the back blunt body semicircle is parallel to one edge of the front blunt body rectangle, a cavity is formed between the diameter of the back blunt body semicircle and the edge of the front blunt body rectangle, and the radius of the front blunt body semicircle is larger than that of the back blunt body. By the additional arrangement of the blunt bodies in the concave pit of the rotor of the rotor engine, a backflow region is formed in a combustion chamber, the formation of gas mixture and flame propagation are accelerated, and the high combustion efficiency is achieved.

The invention relates to an application of multilayer foamed iron-nickel metal materials and aims to provide an application of the multilayer foamed iron-nickel metal materials in isolation and suppression of gas explosion in order to explore the isolation and suppression conditions of the multilayer foamed iron-nickel metal materials in the aspect of the gas explosion. A method comprises steps asfollows: 2-3 layers of the foamed iron-nickel metal materials are arranged at intervals, the distance between every two adjacent foamed iron-nickel metal materials is 5-20 cm, the thickness of each layer of the foamed iron-nickel metal material is 2-3 cm, porosity of the foamed iron-nickel metal material close to the side of a detonating point is 20-30 PPI, and porosity of the other foamed iron-nickel metal materials is 10-30 PPI. The invention applies to the field of gas explosion suppression and isolation.

The invention relates to an engine combustion device. The engine combustion device comprises a main combustion chamber, a spark plug, an auxiliary combustion chamber and flame spray holes, wherein initial flames are generated in the auxiliary combustion chamber through discharging of the spark plug, then the flames are generated in the auxiliary combustion chamber and develop rapidly, then multiple jet flames are generated through the plurality of spray holes used for connecting the auxiliary combustion chamber with the main combustion chamber, the multiple jet flames are jetted into the maincombustion chamber at the same time and are equivalent to a high-energy multi-core ignition source of the main combustion chamber, and mixed gas in the main combustion chamber is ignited by multiple large-area flames at the same time. According to the engine combustion device, the combustion speed of the mixed gas is increased, the ignition stability and reliability are improved, and the knockingphenomenon can be effectively restrained.

The invention relates to an anticlockwise-tumble-ratio combustion system for an automotive engine. The anticlockwise-tumble-ratio combustion system comprises a combustion chamber roof, a cylinder wall, an exhaust valve, a pit piston, an exhaust-side oil sprayer, an intake valve seat ring and a vertical intake channel, wherein the exhaust valve, the exhaust-side oil sprayer, an asymmetrical intake valve rod and an asymmetrical intake valve are arranged on the combustion chamber roof; the included angle between the central line of the vertical intake channel and the central line of the intake valve seat ring is 15-25 degrees; fresh air enters through the vertical intake channel, and more gases flow towards the right under the action of the asymmetrical intake valve, collide with the pit piston to be reflected, and form serious clockwise rotating tumble in a cylinder through the guide of the cylinder wall and the combustion chamber roof, for improving flowing at the exhaust side, reducing a detonation trend and accelerating combustion. The anticlockwise-tumble-ratio combustion system disclosed by the invention is capable of effectively reducing the detonation of a lateral direct-injection gasoline engine in the cylinder, improving the strength of the tumble in the cylinder, and accelerating the combustion.

The invention belongs to the related technical field of laser ignition, and discloses an integrated microwave enhanced laser plasma ignition experiment system. The system comprises a laser emission unit, a microwave emission unit, an igniter and a constant volume combustion bomb, the laser emission unit is used for emitting laser, the microwave emission unit is used for generating microwaves, the igniter is used for receiving the laser emitted by the laser emission unit and the microwaves generated by the microwave emission unit, and performing ignition by using the laser and the microwaves. The constant-volume combustion bomb is arranged below the igniter, and an ignition head of the igniter is arranged in the constant-volume combustion bomb, so that the combustion process is isolated from the outside. According to the system, microwave ignition and laser ignition are coupled together, and a basic research means is provided for deep research on the microwave-enhanced laser ignition process, the plasma-enhanced combustion mechanism and potential application of microwave-enhanced laser ignition on a real machine.

The invention relates to the technical field of heat energy engineering, and discloses an anti-backfire device for a gas mixing type combustor. The anti-backfire device comprises a shell, a mixing pipe cavity is fixedly formed in one end of an inner cavity of the shell, a combustion cavity located in the inner cavity of the shell is fixedly formed in one side of the mixing pipe cavity, and four hydrogen pipes are fixedly installed in the inner cavity of the mixing pipe cavity. According to the anti-backfire device, a first spray head is cooled through flowing of air, the flame propagation speed of hydrogen is decreased, meanwhile, the flame propagation speed of natural gas is increased, and the backfire phenomenon is effectively prevented; and by designing that the pipe body diameter value of a protection pipe set changes in a progressive manner, when air flows in a pipe body of the protection pipe set located on the outer surface of the first spray head, insufficient heat absorption caused by heat contained in the air is effectively offset, and when air flows in the pipe body of the protection pipe set located on the outer surface of a second spray head, the reverse heat conduction phenomenon at the position of the second spray head and the reverse cooling problem of an opening in the front end of the second spray head can be avoided.

The invention discloses a grinding waste perforated brick. The grinding waste perforated brick comprises, by weight, 10-25 parts of grinding wastes, 5-10 parts of basalt, 35-50 parts of furnace slag, 2-6 parts of manganese dioxide, 1-2 parts of borax, 2-4 parts of perlite, 10-20 parts of river sands, 1-5 parts of wood chips and 80-100 parts of water. The perforated brick has the advantages of scientific production technology, convenience in manufacturing, realization of waste utilization, low production cost, compactness, high strength, high hardness, good binding property, good wear resistance, no desertification, no cracks caused by rapid change of the temperature, no porcelain formation, no fragmentation, strong water absorption property, small shrinkage, wear, pressure, acid-alkali and ageing resisting functions and long service life.

The invention discloses an optimized internal combustion engine piston top structure comprising a piston. A concave combustion chamber is arranged on the piston top, and a circle of a flow guide surface is obliquely arranged on the piston top adjacent to the edge and is provided with the lower exterior and the high interior. Thus, the piston top is capable of guiding the flow and oblique as designed, the machining and manufacturing process is simple, the cylinder internal flow field strength can be increased by 8% around under the same compression ratio, the flame transmission or fuel and gas mixing speed of the internal combustion engine is increased significantly, the combustion time is shortened, the isopycnal level is raised, and the efficiency of the engine is improved.

The invention discloses a gas mixed clean fuel, and belongs to the technical field of fuel combustion. The purpose of the invention is to provide the clean fuel containing multiple mixed gases and having a high combustion efficiency and a low production cost. The fuel comprises, by mass, 36-42% of natural gas, 24-32% of water gas, 2-6% of liquefied petroleum gas and 25-35% of methyl ether. The natural gas, water gas, liquefied petroleum gas and dimethyl ether are mixed according to a reasonable ratio, so the advantage complementation of all above fuels is well achieved, the combustion efficiency is obviously improved, and the gas mixed clean fuel also has the advantages of no environmental pollution during combustion, facilitation of atmospheric environmental protection, reduction of the overall cost, and significant commercial and economic benefits.

The invention relates to a throttle valve of an automobile engine, in particular to a sound wave throttle valve. The side-by-side sound wave throttle valve of the invention consists of a carburetor base, a driving shaft and a throttle valve blade, wherein the driving shaft is connected with the carburetor base; the throttle valve blade is fixedly connected with the driving shaft; a sounding hole bearing device is arranged on the upside of the throttle valve blade; and a sounding hole is formed on the sounding hole bearing device. When the side-by-side sound wave throttle valve of the invention is used, the transmission speed of a flame in a combustion process is improved; explosive thrust is increased, the fuel consumption is reduced; the exhaust emission is greatly reduced; the engine power is enhanced; and thus, the aims of self-cleaning in the engine, saving oil and reducing emission are achieved.

The invention relates to a combustion chamber for a natural gas engine. The combustion chamber is a closed area composed of a cylinder sleeve, a piston and a cylinder cover, a spark plug is arranged at the position, in the middle of the combustion chamber, of the cylinder cover, and the bottom of the cylinder cover is flat. The combustion chamber is characterized in that the top of the piston hasan uneven shape and comprises a gradual contraction part, a throat part and an expansion pare from inside to outside with the center line of the piston as a symmetry axis; the gradual contraction partexpands outwards in the radial direction of the piston from the center line of the piston, the cross section area gradually decreases, and the gradual contraction ends at the throat part; the cross section area of the throat part is the smallest; the expansion part extends outwards in the radial direction of the piston, and the cross section area gradually increases; the cross section curve of the gradual contraction part is designed according to the Witoszynski formula.

The invention relates to a high-concentration pulverized coal mixing injection device and a method for increasing combustion efficiency, which belong to the technical field of the pulverized coal combustion of industrial boilers, wherein the technical problem to be solved is to provide a high-concentration pulverized coal mixing injection device capable of effectively increasing combustion efficiency by using a Roots blower for conveying pulverized coal and adequately mixing pulverized coal with primary air, and a method for increasing combustion efficiency; the adopted technical scheme is that a pulverized coal conveying tube connected with a coal bunker is arranged in a primary air tube, and the Roots blower is arranged on the pulverized coal conveying tube. The high-concentration pulverized coal mixing injection device disclosed by the invention is simple and reasonable in structure, convenient to use, and widely applied to the pulverized coal combustion of industrial boilers.