54results about How to "Improve ignitability" patented technology

A fuel injector includes: a pilot injector configured to spray fuel so as to form a first combustion region in a combustion chamber; and a main injector provided coaxially with the pilot injector so as to surround the pilot injector and configured to supply a fuel-air mixture that is a mixture of the fuel and air to form a second combustion region in the combustion chamber, wherein the pilot injector includes: a center nozzle configured to eject air jet flowing straight in an axial direction on a central axis of the pilot injector; an inside swirler provided on a radially outer side of the center nozzle and configured to cause inflow air to swirl around the central axis; and a pilot fuel injecting portion configured to inject the fuel from between the center nozzle and the inside swirler to air flow in the center nozzle.

A control system for controlling the ignition of a plasma-jet spark plug provided in an internal combustion engine senses an operating condition of the internal combustion engine, and determines an ignition mode of the plasma-jet spark plug in accordance with the sensed operating condition. The control system performs an ignition control of breaking down the insulation across a spark discharge gap by applying a first electric power to the plasma-jet spark plug, and producing plasma in the vicinity of the spark discharge gap by applying a second electric power to the spark discharge gap in a state of dielectric breakdown. The control system performs this ignition control according to the ignition mode determined as mentioned above.

A non-/low-toxic, non-hypergolic, propellant formulation generally comprising metal nanoparticles, such as boron, aluminum, or carbon, and one or more fluoro-polymers mixed in in particulate form. The present invention takes advantage of the increased surface area provided by nano-sized metallic particles to enhance the metal's combustion efficiency, or ignitability. The inclusion of fluoro-polymers also aids in increasing the combustion efficiency of the metallic nanoparticles due to the presence of halogenic oxidizers. The thermal degradation of a halogenated fluoro-polymer additive in the propellant combustion zone serves to release halogens, thereby improving the combustion of the metallic nanoparticles and increasing the propulsion system's energy output. The present invention's formulation is safe to store and handle, environmentally-friendly, and may be economically manufactured to provide for widespread, cost-effective use.

In a cross section perpendicular to a central axis direction of the honeycomb substrate, cells are arranged so that a periphery of an inlet plugged cell is surrounded with four rectangular outlet plugged cells and four square outlet plugged cells, and in the cross section, a partition wall center distance a, a partition wall center distance b and a partition wall thickness t satisfy the following equation (1). Additionally, an amount of a catalyst per unit volume of partition walls which is loaded onto the partition walls defining the rectangular outlet plugged cells and the inlet plugged cells is larger than an amount of a catalyst per unit volume of the partition walls which is loaded onto the partition walls defining the rectangular outlet plugged cells and the square outlet plugged cells.

0.95<b/at<1.90  (1)

A glow plug and related manufacturing method are disclosed. The glow plug includes a heating section for heating a combustion chamber of an engine for promoting an ignition. The heating section includes a ceramic heating element developing a heat when applied with electric power, a ceramic insulating support body embedded with the heating element, and a pair of lead wires connected to the heating element and having terminal portions exposed to a surface of the insulating body. The heating element has a positive temperature coefficient of resistance and includes: (a) initial resistance R20 equal to or greater than 0.3Ω and equal to or less than 0.65Ω; (b) heating resistance R1200 equal to or greater than 0.7Ω and equal to or less than 1.3Ω; and (c) temperature coefficient of resistance R1200/R20 equal to or greater than 2.0 and equal to or less than 4.0.

The invention provides a head design of a combustion chamber of a twin-stage premixing ground-based gas turbine. The basic structure of the head comprises a central vortex tube, a crescent-shaped flame stabilizer and an outside annular vortex tube, wherein the central vortex tube is provided with double hydrocyclones; the crescent-shaped flame stabilizer is arranged at the down stream of the central vortex tube; and the outside annular vortex tube surrounds the central vortex tube. According to the design, a full-premixing combustion mode of the head is adopted mainly, so that the emission of NOx is reduced; air entering from a central value grade vortex tube of the head firstly passes through the first hydrocyclone, and then is mixed with ejected fuel; when a mixture flows out of the central vortex tube, the mixture is mixed and enhanced by the second hydrocyclone; at the same time, the hydrocyclone further prevents tempering; the central value grade premixed fuel forms a stable ignition source on the flame stabilizer; and the premixed fuel flowing out of the outside main burning stage is ignited, burning is carried out stably and mildly, and uniform combustion is achieved. The design can guarantee that the ground-based gas turbine can keep low emission of NOx and stable combustion on operating conditions of all loads.

The composition of fire-extinguishing agent is made of (wt%) 40-65% of oxidant, 10-20% of fuel, 20-40% of catalyst, 0-5% of additive and 3-7% of combustion speed regulator, in which the oxidant is ammonium nitrate, the fuel is a compound whose molecular formula is CnH2n-2On-1 (n=5-7), and the catalyst is one of nitrates or mixture of more than two kinds of them, and the combustion speed regulatoris chloride, inorganic acid salt and organic acid salt. Said invented fire extinguisher includes exhaust chamber, cooling chamber and charging chamber, said three portions are made into cylindrical form. Said exhaust chamber includes filtering screen and nozzle on the filtering screen, the cooling chamber includes includes at least 6 layers of sieve plates, on the plate the screen for holding cooling agent is laid, and the charging chamber also is equipped with a starter made of chemical initiating agent. Its combustion speed is high, it does not pollute environment, and is extensive in application.

A controller (an engine controller 100) allows a fuel to be fed into a cylinder 11 within a range from an intake stroke to a compression stroke, if an engine body (an engine 1) is at a low temperature which is equal to or below a predetermined temperature and is under a load which is equal to or greater than a predetermined load. The controller instructs a fuel injection valve 53 to inject a greater amount of the fuel during the compression stroke than during the intake stroke if the content of an unconventional fuel in the fuel is higher than a predetermined level, and to inject a greater amount of the fuel during the intake stroke than during the compression stroke if the content of the unconventional fuel in the fuel is equal to or lower than the predetermined level.

A spark plug for an internal combustion engine is provided, which includes a housing, an insulation porcelain, a center electrode and a ground electrode. At least one of a tip portion of the center electrode and an opposing portion of the ground electrode is provided with a projection portion. At least one of the projection portions has a cross section perpendicular to the axial direction of the plug, the cross section having a minimum curvature radius portion and being in a specific shape that satisfies a predetermined requirement. The requirement is that, when a first straight line, a first line segment and a second straight line are provided, and when the cross section is divided into a first region and a second region by the second straight line, the second region has an area larger than the area of the first region.

The invention provides applications of dry cow dung in preparation of incense products. The invention further provides the incense products containing the dry cow dung and a manufacturing method of the incense products. According to the technical scheme, dry cow dung is adopted as the main component for preparing the incense products such as incense sticks for the first time, and thus a novel utilization way is developed for cow dung.

An internal combustion engine includes: a main combustion chamber; an intake port connected to the main combustion chamber; an exhaust port connected to the main combustion chamber; a sub-chamber; and a spark plug in the sub-chamber. The sub-chamber is provided between the intake opening portion and the exhaust opening portion and connected to the main combustion chamber through a plurality of communication holes. The communication holes include a first communication hole provided on the intake opening portion side, and a second communication hole provided on the exhaust opening portion side. The first communication hole is closer to a piston than the second communication hole is. The first communication hole is inclined to be closer to the piston as the first communication hole is positioned toward the inside from the outside of the sub-chamber.

The invention discloses an oil-saving ignition method for fault coal and a pulverized coal burner applying the method. In the method, pulverized coal streams are ignited by using a small amount of fuel oil in the pulverized coal burner and at the outlet of the pulverized coal burner, and flames of the pulverized coal streams replace atomized torch flames of a big oil gun in the traditional ignition mode. The burner comprises a shell; a composite chamber and a main oil gun are arranged in the shell; an auxiliary oil gun is also arranged in the shell, and is arranged in a certain lower-level chamber at the rear end of the first-level chamber; and the pulverized coal body heated in the burner moves to the auxiliary oil gun and then is ignited by the auxiliary oil gun so as to form stable pulverized coal stream flames. The auxiliary oil gun is arranged at the rear end of the main oil gun in the burner, and the distance between the two oil guns is long enough, so the pulverized coal body can be reliably heated to the degree suitable for ignition and then is reliably ignited so as to achieve good oil-saving effect.

A spark plug including an insulator having an axial hole in an axial direction of the spark plug; a center electrode disposed in a tip end side of the axial hole of the insulator; a metal shell surrounding the insulator; a first ground electrode including a first ground electrode body having one end joined to the metal shell, and a noble metal tip joined to an inner side face of another end portion of the first ground electrode body and disposed opposite a tip end face of the center electrode across a first discharge gap. One end of the second ground electrode is bonded to the metal shell, and the another end is disposed opposite a side peripheral face of said center electrode or a side peripheral face of said insulator across a second discharge gap. Furthermore, the spark plug is characterized as having a distance t and an included angle θ as defined herein.

The invention provides a gas generator ignition agent and a preparation method thereof, and a gas generator for a vehicle safety airbag. The gas generator ignition agent contains a fuel, an oxidant, abinder and an additive, wherein the additive is an oxazole-based energy-containing ionic compound. According to the present invention, by adding 5-aminotetrazole nitrate to a boron/potassium nitrateignition agent, on the basis of the ensuring of the combustion heat and the combustion temperature of the agent, the high-temperature and high-pressure gas amount can be increased, the output pressureof the ignition agent can be increased, and the output performance of the ignition pipe can be increased, such that the pressure starting time of the gas generator is advanced to less than 2 ms, andthe pressure value at 10 ms is increased by about 20 Kpa so as to improve the gas generating performance of the gas generator.

The invention provides a transmitting body capable of achieving secondary acceleration. The transmitting body comprises a main transmitting body and a transmitting head. An inner cavity of the main transmitting body is internally provided with first-level power media. The transmitting head is arranged at the front end of the main transmitting body, and a heat isolation layer is arranged between the transmitting head and the main transmitting body. The transmitting head comprises a bullet head shell with an installing port, a double gold piece, a heat conduction motivating rod and a power chamber, wherein the double gold piece is arranged in an inner cavity of the bullet head shell through the installing port, and second-level power media are contained in the power chamber. The power chamber is provided with a splicing structure detachably connected with the bullet head shell. One end of the heat conduction motivating rod is connected with the second-level power media, and the other end of the heat conduction motivating rod is opposite to the double gold piece. A gap is formed between the double gold piece and the heat conduction motivating rod. The double gold piece is deformed due to heating and is connected with the heat conduction motivating rod. The problems that in the prior art, a transmitting body cannot achieve interval sub-level ignition boosting, and the stability and shooting precision of bullets are poor are solved, and the problem that users cannot change the firing range of the bullets is solved.

In a control method of an internal combustion engine including a fuel injection valve having a plurality of injection holes and adapted to directly inject a fuel into a cylinder and an ignition plug adapted to generate a plug discharging channel, after fuel injection is performed, spark ignition is performed while turbulence in an air flow is generated by the fuel injection by an ignition plug disposed so that a discharging region is sandwiched by fuel sprays injected from the two adjacent injection holes and located within a range where the turbulence in the air flow is generated.

The invention relates to an ignition control device of a combustion-driven all gas-phase iodine laser combustion chamber and a control method. The device is provided with a data acquisition controller; the control voltage output by the controller is connected with a spark device through a voltage regulator and a drive circuit; then the spark device is connected to a spark plug through a conductive wire; and a control program is stored in the data acquisition controller. The method comprises the steps of presetting the amount of the gas-flow rate; introducing an oxidant into the combustion chamber according to the preset flow rate; starting an ignition switch, and igniting a fire maker; introducing fuel into the combustion chamber according to the preset flow rate; judging whether the ignition is successful according to the changes of the temperature and the pressure as well as the illumination condition of the combustion chamber; if the ignition is successful, adding other experimental gases; stopping the ignition switch, and stopping igniting the fire maker; stopping introducing the gas into each pipeline; and finishing the experiment. The invention has the advantages of simple structure, low cost, convenient operation, high efficiency, safety and good ignition effect, and ensures that the gas ignition implementation of the combustion chamber is simple in an ordinary laboratory.

The invention discloses a self-suction environment-friendly gasification inverse combustion heating furnace. The self-suction environment-friendly gasification inverse combustion heating furnace comprises a combustion chamber, a heat exchange chamber and a gasification chamber. The combustion chamber is arranged horizontally, the gasification chamber and the heat exchange chamber are vertically distributed above the combustion chamber, and therefore a U-shaped furnace body structure for gasification sectional combustion is formed. A turbulent flow baffle extends downwards from the position, close to a first channel, of the inner side of a top plate of the combustion chamber, and the positions, corresponding to the gasification chamber and the heat exchange chamber, of the bottom of the combustion chamber are respectively provided with a slag pit. An air supply port is formed in the combustion chamber, a smoke discharging pipeline enabling negative pressure to be formed in the U-shaped furnace body structure is arranged at the top of the heat exchange chamber, a gasification agent supply port is formed inside the gasification chamber, and the air supply port, the smoke discharging pipeline and the gasification agent supply port are provided with valves used for regulating and controlling operating conditions of the U-shaped furnace body structure together. The self-suction environment-friendly gasification inverse combustion heating furnace is simple in structure, convenient and rapid to operate, high in combustion efficiency, low in environment pollution, and capable of reducing investment cost and operating cost.

A spark plug is provided, which includes a housing, an insulation porcelain, a center electrode, a main ground electrode, a first sub ground electrode and a second sub ground electrode. The first and second sub ground electrode are arranged being opposed to each other. Requirements of Hs1<Hc+Gm, Gm<Gs1+Gg, Gm<Gs2+Gg, Hs2≧Hs1 and Hc<Hs2 are satisfied, where Hc is the length of projection of the center electrode, Gm is the size of the main gap, Hs1 is the length of projection of the first sub ground electrode, Hs2 is the length of projection of the second sub ground electrode, Gs1 is the length of the first sub gap in the radial direction of the plug, Gs2 is the length of the second sub gap in the radial direction of the plug, and Gg is the distance between an outer peripheral edge portion and an inner peripheral edge portion of a porcelain tip portion in the radial direction of the plug.