35results about How to "Shorten ignition delay" patented technology

The present invention provides an automotive fuel injection system for a compression ignition engine, comprising a fuel injector configured to receive a fuel having an octane rating between 87 and −30 and configured to meter the fuel into the compression ignition engine, and a heater coupled to the fuel injector and configured to heat the fuel injector such that the fuel is heated to a predetermined minimum temperature, whereby the ignition delay of the fuel is reduced below a predetermined maximum ignition delay.

A method for generating extreme ultraviolet radiation and soft x-ray radiation with a gas discharge operated on the left branch of the Paschen curve, in particular, for EUV lithography,wherein a discharge chamber (10) of a predetermined gas pressure and two electrodes (11, 12) are used, wherein the electrodes have an opening (14, 15), respectively, positioned on the same symmetry axis (13) and, in the course of a voltage increase (16) upon reaching a predetermined ignition voltage (Uz), generate a plasma (17) located in the area between their openings (14, 15), which plasma is a source of the radiation (17′) to be generated,wherein an ignition of the plasma (17) is realized by affecting the gas pressure and / or by triggering,and wherein, with the ignition of the plasma (17), an energy storage device supplies by means of the electrodes (11, 12) stored energy into the plasma (17), characterized in that the ignition of the plasma (17) is realized by using a predetermined ignition delay (18).

The invention discloses an underwater thermoelectric hybrid power system based on steam plasma. The underwater thermoelectric hybrid power system comprises a combustion chamber, a gas-solid separator,a turbine, a heat exchanger, a condenser, a gas-liquid separator, a second compressor, a fuel cell, a powder supplying device, a plasma igniter / booster, a first compressor and a pump. An aluminum / water combustion reaction is started and enhanced through the plasma igniter / booster by taking aluminum powder as fuel and taking primary superheated steam as an oxidizing agent. On one hand, water is heated through great heat released by the aluminum / water reaction to be changed into steam and drive the turbine to do work to generate thrust; and on the other hand, hydrogen generated through the aluminum / water reaction is converted into electric energy for driving the plasma igniter / booster through the fuel cell, therefore, efficient utilization of energy is achieved, and the disposal problem ofhydrogen in an underwater environment is reasonably solved.

The invention discloses a plasma system of a natural gas engine. The plasma system of the natural gas engine comprises a gas inlet pipe, an exhaust pipe, an EGR pipe, a plasma generator and a catalyst. One end of the EGR pipe communicates with the exhaust pipe, and the other end of the EGR pipe communicates with the gas inlet pipe. The EGR pipe is provided with an EGR adjusting valve connected with an ECU in a controlled manner. The plasma generator is arranged on the exhaust pipe and located on the upstream side of the communication position between the EGR pipe and the exhaust pipe. The catalyst is arranged on the exhaust pipe and located on the downstream side of the communication position between the EGR pipe and the exhaust pipe. The plasma system of the natural gas engine can shorten the ignition delay time of the engine, increase the flame propagation velocity in a cylinder and widen the knock border, so that the combustion efficiency is improved, and HC discharge is lowered. Meanwhile, the ignition energy of an ignition system can also be lowered, and the reliability of the ignition system is improved. Besides, the plasma system of the natural gas engine can improve the conversion efficiency of the three pollutants of CH4, NOx and CO.

The invention relates to a gasoline engine ignition mechanism comprising a supersonic jet orifice pre-combustion chamber. The ignition mechanism comprises a cylindrical connecting piece, an oil sprayer mounting hole penetrating through the upper end face and the lower end face of the connecting piece, a spark plug mounting hole penetrating through the connecting piece, a pre-combustion chamber connected with the peripheral face of the connecting piece, a pre-combustion chamber oil sprayer matched with the oil sprayer mounting hole and a pre-combustion chamber spark plug matched with the spark plug mounting hole, wherein the pre-combustion chamber is formed by combining three sections, namely a first cylindrical sleeve body, a conical sleeve body and a second cylindrical cavity body from top to bottom in sequence, N uniformly distributed spray holes are formed in the lower part of the second cylindrical cavity body, and N is greater than or equal to 3; at least one of the spray holes is an over-expansion supersonic jet flow spray hole, and jet flow of the supersonic jet holes not only can shorten ignition delay, but also can prolong the lean combustion limit of a mixture in the main combustion chamber.

A geometric compression ratio in an engine main body 1 is set to 15 or less. Injection control means (ECU 40) performs a main injection of injecting fuel near a compression top dead center, and a preceding injection prior to the main injection at a specific region of predetermined load within an operating region on a relatively low-speed side. The injection control means performs, as the preceding injection, a pilot injection of performing injection at a timing such that at least part of a fuel spray reaches outside a cavity 31 on a top face of a piston, and a pre-injection of injecting fuel at a predetermined timing after the pilot injection, to suppress thereby ignition of the fuel injected by the pilot injection and shorten an ignition delay of the fuel injected by the main injection.

Fuel compositions based on biodiesel, lower alcohols and plant oil for feeding Diesel cycle engines, enabling more perfect burning, less emission of pollutants and less formation of internal deposits of impurities onto the inner surface of engines. Since the blends exhibit density similar to that of diesel oil, as well as chemical affinity for the latter (since it contains biodiesel, which performs the function of co-solvent), the present invention also relates to compositions of quaternary blends, that is, junction of the ternary blends proposed (biodiesel, lower alcohol and vegetable oil) with petroleum diesel in the most varied proportions. The preferred embodiment of this invention provides the replacement of fuel of non-renewable source (diesel oil) by others of renewable source, which are natural, non-toxic, biodegradable and that have excellent technical performance.

Ignition of a gas discharge lamp 10, which has a gas containing main space and two inner electrodes, of a lighting unit 4 of a lighting system is achieved by the use of a high frequency resonance circuit. The resonance circuit is connected to the inner electrodes and to a supply device 2, which supplies an alternating supply voltage. An outer electrode 22 is arranged near one the inner electrodes and to a node of the resonance circuit. Upon supplying the supply voltage a high voltage alternating burst will be generated at the outer electrode. This will result into a discharge of the gas in the main space. In turn, this will induce a discharge of the remaining gas. Then the frequency of the supply voltage will increase and a small reactive current only will remain to flow through the resonance circuit.

The invention relates to a methanol engine with a dual-plasma generator. According to the technical scheme, the methanol engine comprises an engine air cylinder, an igniter, an ECU, a methanol nozzle,a methanol pressurizing pump and a methanol storage tank, an air inlet manifold and an exhaust pipe communicating with the engine air cylinder are connected to the engine air cylinder, an exhaust gasrecirculation pipeline communicating with the air inlet manifold and the exhaust pipe is arranged between the air inlet manifold and the exhaust pipe, an EGR valve is installed on the exhaust gas recirculation pipeline, the signal input end of the EGR valve is connected with the signal output end of the ECU, a first plasma generator is installed on the air inlet manifold, and a second plasma generator and a three-way catalytic converter are successively installed at a connecting point between the exhaust gas recirculation pipeline and the exhaust pipe along the exhaust pipe at the rear part of the exhaust direction of the exhaust pipe. According to the methanol engine with the dual-plasma generator, the engine ignition delay time is shortened, the flame propagation velocity in the cylinder is increased, thus the combustion efficiency is improved, emission of hydrocarbons is lowered, and the reoxidation temperature of pollutants such as NOx, CO and formaldehyde is lowered, so that theconversion efficiency of the three pollutants is improved.

The invention relates to a diesel engine and a method of controlling the same. The diesel engine of the present invention includes an engine body supplied with fuel containing diesel fuel as its main component, and the geometric compression ratio is set below 15:1; it is arranged in the engine body toward the cylinder of the engine body and directly injected a fuel injection valve for fuel into the cylinder; and a control module for controlling a pattern of injecting the fuel into the cylinder through the fuel injection valve. The control module performs a main injection such that the injected fuel produces a main combustion mainly comprising diffusion combustion, and performs a plurality of pre-stage injections prior to the main injection such that the injected fuel produces a pre-stage prior to the main combustion combustion. The control module controls an injection pattern of the injection to adjust a heat release rate.

The invention provides a double pulse solid rocket engine ignition device suitable for a soft partition plate structure. An igniter is installed in the center of the end face of a propellant, and grain columns are distributed on the end face of the propellant in a multi-circle surrounding manner with the igniter as the center so that the grain columns can rapidly ignite the propellant, and the ignition delay of a second pulse engine is greatly shortened; that is, by reasonably arranging a dot-matrix structure of the grain columns in a second pulse ignition device and selecting the ignition grain columns working for a long time, the second pulse ignition device can bear the working pressure and vibration of a first pulse engine in the working process, adverse effects brought by instantaneous increase of the initial free volume after a soft partition plate ignition is opened to ignition starting of the second pulse engine can be eliminated, and the problem of ignition delay of the second pulse engine is effectively solved; and besides, the double pulse solid rocket engine ignition device is simple in structural design, the second pulse engine is reliable in ignition and free of ignition delay, part of negative mass is reduced, and the structure of the ignition device is more miniaturized.

Regulated pneumatic gas is supplied through a gas supply tube (14) which is welded to a pilot valve housing (18) which accommodates a solenoid valve (16). When the solenoid valve is electrically activated and opened, the pneumatic gas flows through a bifurcated channel (22) which is welded to the pilot valve housing and to a fuel valve mechanism (24A) and to an oxidizer valve mechanism (24B). The force of the pneumatic gas causes pistons (38A, 38B) to actuate respective poppets (36A, 36B). Movement of the poppets results in the dispensing of fuel propellant from a fuel outlet chamber (44A) and the dispensing of oxidizer from an oxidizer outlet chamber (44B). The fuel valve mechanism and oxidizer valve mechanism are positioned and oriented such that the exiting fuel and oxidizer are mixed in a vortex rocket engine.

The invention relates to a micro gas-liquid dual-purpose high energy igniter, and relates to the technical field of engines. The micro gas-liquid dual-purpose high energy igniter has the advantages that 1) the success rate is increased, and the ignition lag time is shortened under the condition of relatively low ignition energy of a single igniter plug; 2) an efficient circumferential rotational flow structure can be formed in the igniter, the flue gas and flue oil retention time is prolonged, and mixing is enhanced, so that the formation of a stable flame structure is facilitated; 3) a circumferential vortex system structure is formed in a flow field, wherein the vortex system structure comprises a vortex system structure body clinging to the inside wall surface of an inner wall and a circumferential vortex system flow structure formed by entraining inner fluid by the vortex system structure body; 4) the ignition lag is reduced, the ignition success rate is increased, and the flue gasand flue oil retention time is prolonged on the premise of the smallest size of the igniter; and 5) the atomization effect can be ensured, and the fogdrop collision with a stone wall can be avoided.

The invention discloses a method for efficiently catalytically decomposing ammonium perchlorate based on energetic complex [Mn(BTO)(H2O)2]n. The method comprises mixing an energetic complex [Mn(BTO)(H2O)2]n and ammonium perchlorate according to a certain ratio and grinding; and putting the ground mixture in a nitrogen environment and reacting at 270-305 DEG C for 5-10 min. The employed catalyst [Mn(BTO)(H2O)2]n has extremely good catalytic decomposition effect on ammonium perchlorate, and is capable of greatly reducing the decomposition temperature, and control on decomposition temperature of ammonium perchlorate is realized by changing the addition amount of the catalyst. The method is simple and reliable, hopefully, the burning rate of spaceflight propellants can be improved, and the firing delay can be shortened.

The invention provides a fuel gas generating device. The fuel gas generating device comprises an injector (1), an oxidizing agent collector (2), a fuel collector (3) and a body (4), wherein the oxidizing agent collector (2) and the fuel collector (3) are arranged on the injector (1) which is connected to the body (4); an oxidizing agent and fuel enter the injector (1) respectively through the circular ring-shaped oxidizing agent collector (2) and the fuel collector (3), then are atomized by double coaxial nozzles (5) and coaxial direct-flow type nozzles (6) in the injector (1) and finally are burned; and products generated after burning enter the body (4). The fuel gas generating device solves the problems of long ignition delay time, low ignition reliability and uneven fuel gas outlet temperature, shortens ignition delay and improves ignition reliability and evenness of fuel gas outlet temperature from structural design.