12results about How to "Reliable ignition" patented technology

The invention belongs to the field of medium-large-scale scramjet engines, and particularly relates to a medium-large-scale scramjet engine and a relay ignition method thereof. The medium-large-scale scramjet engine comprises a combustion chamber, an ignition device I and an ignition device II; at least one concave cavity is formed in the combustion chamber, the two ignition devices are arranged on the same concave cavity, the ignition device I is arranged on the inner wall of the middle stream of the concave cavity, and the ignition device II is arranged on the inner wall of the downstream of the concave cavity; when the pre-injection pressure of the fuel injection hole in the upstream of the ignition device in the combustion chamber is balanced, the ignition device I starts to excite work, and after the set time, the ignition device II starts to excite work. On the basis of the technical scheme of an existing scramjet engine, relay type ignition is conducted by introducing the two ignition devices, the arrangement positions of the two ignition devices are matched, and the problem that initial fire cores and initial flames formed by a single ignition device in a medium-large-scale engine cannot be spread to the main stream of a combustion chamber is solved; and reliable ignition is realized.

This utility model discloses a core structure for a high-energy ignition coil used in automobiles, including a core structure installed inside the ignition coil housing. The core structure comprises a magnetic sheet, a primary coil, a secondary coil, and a toroidal core. The magnetic sheet is embedded in the primary coil, which is interference-fitted into the secondary coil. The toroidal core simultaneously surrounds both the primary and secondary coils and is tightly fitted to the magnetic sheet. The end of the primary core furthest from the magnetic sheet is tightly fitted against the toroidal core. The closed magnetic circuit structure of the toroidal core concentrates the magnetic field almost entirely within the core, resulting in minimal magnetic leakage, uniform magnetic field distribution, low magnetic reluctance, and high magnetic flux density. This leads to high energy conversion efficiency, minimal energy loss, and the efficient energy conversion capability enables the ignition coil to generate higher secondary voltage and stronger spark energy. It is suitable for lean-burn and high-performance engines, ensuring reliable ignition and better fuel economy.

This invention discloses a swirl-spray pre-combustion chamber co-combustion system and method for a UAV diesel engine. The system includes a cylinder block integrating a spherical pre-combustion chamber and a main combustion chamber, a glow plug, a swirl injector, a main injector, and a control unit. The swirl injector injects igniting diesel fuel into the pre-combustion chamber, forming a rich mixture adhering to the wall. After ignition by the glow plug, the high-temperature combustion gas is injected into the main combustion chamber through a jet channel to achieve multi-point synchronous ignition. The control unit integrates altitude adaptive correction and a dual closed-loop control strategy to match injection and ignition parameters in real time. This invention can effectively shorten the combustion duration, reduce cycle fluctuations, and significantly improve the combustion stability and environmental adaptability of the engine over a wide operating range.

This invention provides a launcher for launching electronically ignited fireworks, comprising: a positive and negative terminal of each launch tube connected to the positive and negative terminals of the electronic ignition wire on the fireworks, respectively; a power supply control mechanism igniting the fireworks body through the positive and negative terminals; each positive wire in the control cabinet connected to a positive terminal, and each negative wire connected to a negative terminal; and a solar panel supplying power to the control cabinet. By directly connecting the positive and negative terminals of multiple launch tubes to the positive and negative terminals of the electronic ignition wire of the fireworks through a compression connection, the tedious manual wiring process is eliminated, enabling rapid installation of the fireworks. Simultaneously, the power supply control mechanism triggers stable ignition of the fireworks through the positive and negative terminals, avoiding the risk of electric shock from close contact with high-voltage power and the hazard of wire detachment, making the fireworks easy to install, reliable to ignite, and safe to operate.

The invention belongs to the technical field of aero-engine structural design, and relates to a wide-area ramjet combustion chamber. The structure comprises a spindle-shaped pre-combustion chamber arranged in a stamping combustion chamber, and the front end of the spindle-shaped pre-combustion chamber is connected with an ignition area fuel oil pipeline, an oxygen supplementing pipeline and a stamping air inlet channel through an ignition fuel oil swirl nozzle, an oxygen swirl nozzle and an air swirl nozzle which are coaxially arranged in a sleeved mode; and the rear end of the pre-combustion chamber is connected with a flared flame stabilizer. A main fuel oil circulation cavity channel is formed between the inner wall and the outer wall of the pre-combustion chamber and communicated with a fuel oil pipeline of a main combustion area through a rectification throat channel, and fuel oil is distributed to a spraying hole of the flame stabilizer and a tail oil spraying ring through a rectification partition plate. Wide-area reliable work of the stamping combustion chamber is achieved.

This invention discloses an autonomous decision-making ignition system and method for a plasma torch. The system and method utilize a multi-parameter sensor group to collect key process parameters; an operation status monitoring module monitors key parameters during steady-state operation; a signal acquisition and conditioning circuit receives and processes signals collected by the multi-parameter sensor group; an intelligent control unit is electrically connected to the operation status monitoring module and the signal acquisition and conditioning circuit, and incorporates a database of operating conditions and parameters, as well as a dynamic adjustment algorithm module; an adjustable constant current power supply receives instructions from the intelligent control unit and outputs dynamically set current; a multi-channel gas proportional control valve receives operating gas flow instructions from the intelligent control unit and dynamically adjusts the flow rate of each gas inlet; a human-machine interface is integrated into the intelligent control unit for interaction and operation. This system and method achieve reliable and stable ignition and operation by sensing ignition conditions in real time from multiple dimensions and generating optimal solutions for ignition parameters based on intelligent algorithms.

The invention belongs to the technical field of liquid oxygen rocket engines, particularly discloses liquid oxygen kerosene pintle injection equipment based on impinging mixed flow and a starting method of the liquid oxygen kerosene pintle injection equipment, and aims at solving the problems that an existing direct-current or centrifugal injection type generator is complex in structural design and machining process and high in cost. The device comprises a pintle injector, a generator, an igniter channel, a kerosene circulation channel and a liquid oxygen circulation channel, the pintle injector comprises a central cylinder, a central rod and a shell; a kerosene flowing channel is formed between the central cylinder and the central rod; a liquid oxygen circulation channel is formed between the central cylinder and the shell; the generator comprises a head and a combustion chamber; the igniter channel comprises a gunpowder igniter gas channel; the gunpowder ignition scheme suitable for the pintle injector is designed according to the unique structural characteristics and combustion flow field characteristics of the pintle injector, the structure is simple, and ignition is reliable.

This application discloses a microwave plasma semiconductor exhaust gas treatment device and its control method, belonging to the field of microwave plasma treatment technology. The device includes a microwave generating component, a microwave transmission matching component, a microwave plasma ignition component, and a microwave control component, which are sequentially connected through a microwave transmission path to form a closed-loop treatment system. The microwave plasma ignition component has its input end connected to the output end of the microwave transmission matching component. It has a two-stage resonant structure inside, which is used to receive the matched microwave signal and excite the process gas in the two-stage resonant structure to form and maintain a plasma torch to decompose the exhaust gas. The control method monitors the microwave signal of the dual resonant cavities in real time, compares their resonant frequency difference, and dynamically adjusts the output of the microwave source accordingly to achieve stable ignition and adaptive maintenance of the plasma. It achieves plasma discharge with no electrode loss, high energy efficiency, high uniformity, and strong stability.

The utility model discloses a detonating control circuit of an initiating explosive device. The detonating control circuit comprises an ignition circuit, a current direction control circuit and a state monitoring circuit which are connected in sequence, the first control signal input end QBQK1 and the second control signal input end QBQK2 are connected with the input end of the ignition circuit, the output end of the ignition circuit is connected with the input end of the current direction control circuit, and the output end of the current direction control circuit is connected with the input end of the state monitoring circuit. The output end of the state monitoring circuit is connected with a monitoring signal input end TESTIN and a monitoring signal output end TESTOUT; the ignition circuit is used for realizing and controlling stable output of ignition signals, the current direction control circuit is used for controlling one-way output of current, and the monitoring circuit is used for monitoring states of the initiating explosive device and the whole operating system in real time. Compared with the prior art, dual functions of state monitoring and reliable detonation of the initiating explosive device are realized, and the operation safety of engineering application is ensured.

This utility model discloses a porous media regenerative low-NOx burner nozzle, including a wind box. A tube is disposed on the front side of the wind box, and the back side of the tube is fixedly connected to the front side of the wind box via a first bolt. A heat-conducting pipe is disposed on the outer arc surface of the tube, and a heat-conducting grid is disposed at the bottom of the front side of the wind box. Both ends of the heat-conducting pipe are fixedly connected to the front side of the heat-conducting grid. This utility model provides a porous media regenerative low-NOx burner nozzle that effectively utilizes the high-temperature flue gas generated during combustion to preheat the air entering the wind box. The preheated air temperature is significantly increased, promoting fuel-air mixing and combustion efficiency, and avoiding incomplete combustion caused by low inlet air temperature. This not only improves thermal energy utilization and reduces fuel consumption but also helps reduce the generation of nitrogen oxides, meeting the environmental protection requirements of energy conservation and emission reduction, and is suitable for high-temperature equipment such as industrial furnaces and kilns.

The ignition method and device are applied to a vehicle, the vehicle comprises the pure ammonia engine and a motor, the pure ammonia engine comprises a variable valve timing device, and the method comprises the steps that if a pure ammonia engine starting instruction is received, the motor is controlled to drive the pure ammonia engine to the preset rotating speed, and the rotating speed is maintained for the first preset time; after the first preset time is maintained, the variable valve timing device is controlled to enter a preset control state; ammonia injection control and ignition control are executed at the later stage of the compression stroke of the pure ammonia engine to ignite the pure ammonia engine. According to the method, rapid and reliable starting of the pure ammonia engine in the hybrid power vehicle is achieved, meanwhile, the combustion process is optimized, and the energy efficiency and starting smoothness of the whole vehicle are improved.

The invention discloses a staged ignition system for an afterburner, which is used for solving the problems of unreliable afterburner ignition caused by small radial size, low oil supply pressure and the like of small and medium-sized turbine engines in the prior art, easiness in flameout of the afterburner in a mode conversion process, easiness in influence of afterburner on pneumatic stability of front parts and the like. The device comprises a first nozzle, a second nozzle, a thrust augmentation fuel oil main pipe, an ignition fuel oil pipe and an annular flame stabilizer assembly, wherein the annular flame stabilizer assembly is composed of an air inlet nozzle, an evaporation pipe and a flame stabilizer. According to the invention, ignition starting of the afterburner is realized by innovatively adopting a staged ignition mode. The grading ignition system basically does not occupy an inner runner of an engine, the requirement for the radial size of the afterburner is small, the ignition envelope of the afterburner can be greatly widened, reliable ignition is achieved, and due to the fact that an electric ignition device and a complex fuel metering device are not arranged, the development cost and the development period of the ignition system are greatly reduced.