57 results about "Lean combustion" patented technology

The invention relates to the technical field of engine control, in particular to an engine combustion control method, device and system based on double oil sprayers and a computer program product. Comprising the steps that when an engine enters a lean-burn working condition and meets a self-learning condition, self-learning of the injection starting angle and the excess air coefficient of an auxiliary oil injector is conducted; ignition advance angle self-learning of the auxiliary fuel injector is carried out; and fuel injection control over the auxiliary fuel injector is conducted on the basis of the injection starting angle, the excess air coefficient and the ignition advance angle obtained through self-learning. And when refined fuel oil control is carried out to achieve the optimal fuel consumption of the engine, the lowest NOx emission requirement under the lean-burn working condition of the engine is met.

The invention relates to a cooperative control method and system for lean-burn emission of a marine low-zero carbon fuel engine. The method comprises the steps that real-time in-cylinder pressure and temperature data are collected, and an in-cylinder pressure curve and an in-cylinder temperature curve are obtained through time sequence alignment, filtering denoising and interpolation fitting processing; extracting time sequence data based on the curve, calculating average effective pressure and peak temperature in a cylinder to determine a current load interval, and marking a risk tag sequence; calculating the generation rate of the nitrogen oxides and the particulate matters by matching with reaction condition parameters, and extracting reverse variation characteristics to obtain strong mutual exclusion correlation of the nitrogen oxides and the particulate matters; and based on the associated starting model, predicting and controlling the output oil injection quantity and the air inflow adjusting quantity, calculating the transient time sequence lag quantity through a dynamic lag model, and after superposition, calibrating through a combustion phase matching algorithm to generate an oil injection timing and air inlet valve opening control instruction after transient adjustment. The method is adaptive to the combustion characteristics of low-zero-carbon fuel, emission contradictions are accurately captured, transient emission peak values are avoided, and multi-pollutant collaborative control is achieved.

The invention discloses a pre-combustion chamber charge adjusting jet flow flame ignition combustion system, and relates to the technical field of internal combustion engines. The ignition device is arranged on an engine cylinder cover and can extend into the main combustion chamber, and a pre-combustion chamber and a charge adjusting valve are arranged on the ignition device; fuel can be fed into the pre-combustion chamber and the main combustion chamber. The injection end of the pre-combustion chamber extends into the main combustion chamber, and the charge regulating valve can be closed along with the increase of gas pressure in the main combustion chamber so as to separate the main combustion chamber from the pre-combustion chamber, and can also be opened under the action of gas pressure generated by combustion in the pre-combustion chamber so as to communicate the main combustion chamber with the pre-combustion chamber; according to the pre-combustion chamber charge adjusting jet flame ignition combustion system, the charge entering the pre-combustion chamber from the main combustion chamber is adjusted, ignition of the pre-combustion chamber is controlled, jet flame energy is improved, lean combustion of fuel and air is achieved in the main combustion chamber, the heat efficiency of an internal combustion engine is further improved, and NOx emission is reduced.

A method of operating a gas turbine engine. The gas turbine engine includes an accessory gearbox arranged to power one or more engine accessories, and a combustor in which fuel is combusted and a fuel-oil heat exchanger arranged to transfer heat between oil and fuel that is provided to the combustor. An average temperature of lubricating oil is at least 180° C. on exit from the accessory gearbox at cruise conditions. The method includes transferring heat from the oil to the fuel before the fuel enters the combustor so as to raise the fuel temperature to an average of at least 135° C. on entry to the combustor at cruise conditions. Also provided is a gas turbine engine.

The invention provides an oil injection control method of an ignition system, a storage medium and a vehicle, and belongs to the technical field of vehicles. The method comprises the steps that the current working condition type of an engine is determined based on the engine rotating speed and driver demand torque; an oil injection strategy corresponding to the current working condition type is determined; and based on the fuel injection strategy, the first fuel injector and the second fuel injector are controlled to conduct fuel injection operation. According to the embodiment of the invention, the distances among the first fuel injector, the second fuel injector and the sparking plug are reasonably arranged, and meanwhile, according to the current working condition type of the engine, a proper fuel injection strategy is specifically matched to control the first fuel injector and the second fuel injector to carry out fuel injection matching, so that mixed gas can be distributed more reasonably and ignited more easily; no matter what working condition the engine is in, stable ignition of the engine and stable combustion of flames can be achieved, and meanwhile the lean combustion effect is improved.

The application discloses a kind of gas engine active precombustion chamber lean combustion comprehensive system and control method, belong to gas engine technical field.The system includes main combustion gas inlet pipeline, active gas inlet pipeline, active precombustion chamber and ECU.Active gas inlet pipeline is equipped with active gas inlet electric pressure regulating valve, active gas inlet total gas metering valve, each cylinder precombustion chamber entrance is equipped with active gas inlet single cylinder gas metering valve.ECU and gas inlet manifold pressure sensor and electric pressure regulating valve form closed loop pressure regulating unit, maintain the positive pressure difference between precombustion chamber and main combustion chamber;ECU and total metering valve, single cylinder metering valve, single cylinder exhaust temperature sensor form metering control unit, realize total air intake and single cylinder air intake independent closed loop regulation.The application controls precombustion chamber air intake pressure and each cylinder gas quantity accurately, combines the intercylinder balance control based on exhaust temperature, significantly improves the stability and uniformity of multi-cylinder gas engine lean combustion, effectively improves thermal efficiency.

The invention provides an internal combustion engine-steam combined cycle power generation system for chemical waste gas recovery. The problems that in a traditional scheme, available energy is little, and energy quality is low are solved. Based on an internal combustion engine low-temperature combustion technology, heat transfer loss of a combustion chamber is reduced, waste heat energy taken away by cooling liquid is minimum, and the problem that waste heat available energy of an internal combustion engine is small is solved. Based on the ultra-lean combustion technology of the internal combustion engine, the exhaust oxygen content is increased, the exhaust temperature is reduced, and the input boundary of a downstream waste heat boiler is met. Based on the waste heat boiler graded afterburning technology, oxygen-enriched exhaust gas of an upstream internal combustion engine serves as combustion-supporting air and over-fire air of a boiler burner, graded afterburning is implemented, and the energy quality of waste heat of the internal combustion engine is greatly improved. Based on implementation of the three key technologies, the system heat efficiency of the internal combustion engine-steam combined cycle can be remarkably improved, and the energy efficiency level similar to that of the gas turbine-steam combined cycle is achieved.

A combustor for rich-quench-lean combustion includes a combustor shell, a combustion chamber delimited by the combustor shell, and fuel injectors. The combustion chamber includes a primary zone, a quench zone, a secondary zone, and an outlet arranged in axial flow series. Openings through the combustor in the quench zone provide a quench air flow into the quench zone. A method for rich-quench-lean combustion for the combustor includes contemporaneously injecting a rich air-fuel mixture into the primary zone and injecting a second air flow into the quench zone in which the second air flow is equal to or less than four times the primary air flow.

A control method for a hybrid vehicle configured to switch between stoichiometric combustion and lean combustion in which the target air fuel ratio is set to be leaner than the theoretical air fuel ratio is provided. The control method for the hybrid vehicle includes when the combustion mode is switched from the lean combustion to the stoichiometric combustion, stopping a fuel supply to the internal combustion engine; decreasing an intake air amount of the internal combustion engine during the stop; setting the target air fuel ratio of the internal combustion engine to the theoretical air fuel ratio, or the air fuel ratio richer than the theoretical air fuel ratio, in a state in which the intake air amount of the internal combustion engine is decreased; and restarting the internal combustion engine.

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.

The application discloses a lean-burn engine control method, device and engine system. The lean-burn engine control method comprises the following steps: obtaining a current torque and a target torque; when the current torque is less than the target torque, obtaining an average effective pressure and an excess air coefficient; when the average effective pressure is in a first pressure range and the excess air coefficient is in a first coefficient range, adjusting an ignition angle, increasing air content and combustible content in a cylinder, and increasing the current torque to the target torque. By using the above technical scheme, the current torque can be increased, the thermal efficiency can be ensured to be high, and the combustion center can be prevented from changing, the ignition angle can be prevented from being large, and the lean-burn engine can be prevented from being damaged by knocking.

The invention relates to a diesel methanol dual-fuel engine lean-burn system combined with a heat and power combined supply circulating system and an energy comprehensive utilization method, and the diesel methanol dual-fuel engine lean-burn system comprises a pre-combustion chamber, a dual-fuel injector system, a methanol injection system, an exhaust back pressure adjusting system, the heat and power combined supply circulating system and the like. The fuel injection precision control of the engine is realized through a dual-fuel injector system and a methanol injection system, two working modes of a pure diesel oil combustion mode and a dual-fuel combustion mode are realized, and lean combustion of the engine is realized by adopting an exhaust backpressure adjusting system and micro-injection ignition of a pre-combustion chamber. A combined heat and power supply circulating system is adopted to meet the electric energy and heat energy requirements of the system, and meanwhile engine combustion pollutant emission is reduced. And the economical efficiency, the dynamic property and the environmental protection property of the system under the full-working-condition operation condition are improved.

The present application relates to the technical field of engine, and discloses a matching method of a supercharger for a lean-burn engine and a supercharger for a lean-burn engine, the matching method of the supercharger for the lean-burn engine comprising: obtaining target performance parameters of the engine; obtaining design parameters of the supercharger required by lean-burn combustion and equivalent ratio combustion of the engine under the target performance parameters of the engine; and adjusting and verifying performance parameters of the supercharger required by lean-burn combustion of the engine according to the design parameters of the supercharger required by lean-burn combustion and equivalent ratio combustion of the engine under the target performance parameters of the engine, until the engine can reach the target performance parameters under the performance parameters of the supercharger under lean-burn combustion. The matching method of the supercharger for the lean-burn engine and the supercharger for the lean-burn engine can realize large pressure end flow and small vortex end flow of the supercharger to match the demand of the lean-burn engine under the condition of meeting the design requirements of the supercharger in the early stage.

A method of operating a gas turbine engine having a lean burn staged combustion system having a combustor in which fuel is combusted. The gas turbine engine includes a fuel-oil heat exchanger arranged to transfer heat between oil and fuel that is provided to the combustor. The method includes transferring heat from the oil to the fuel before the fuel enters the combustor so as to lower the fuel viscosity to 0.58 mm2 / s or lower on entry to the combustor at cruise conditions.

The application provides an intake passage multi-point injection spark ignition methanol engine and a vehicle, comprising: an EGR pipeline connected with an intake pipeline and an exhaust pipeline respectively, and the EGR pipeline is arranged on the bypass side of an engine body; the exhaust gas generated by the exhaust pipeline is recycled and supplied to a gas injection system through the EGR pipeline, so that the gas injection system performs multi-point gas injection; the gas injection system is also connected with a methanol supply source, which is used for providing methanol fuel to the gas injection system, and the gas injection system is connected with the engine body and sprays the methanol fuel to the engine body; the opening degree of the intake pipeline and the EGR pipeline is controlled to adjust the intake amount of the engine body, and the methanol injection amount of the gas injection system is controlled to make the spark ignition methanol engine equivalent combustion, lean combustion or rich combustion. The application can improve the combustion and working performance of the methanol engine, reduce the weight of the engine, make the structure of the engine more compact, and improve the power-weight ratio and the power-volume ratio of the engine.

The application provides a compact high-temperature fuel cell jet engine multi-mode split hybrid propulsion system, which is beneficial to solve the problems of low thermal efficiency, high fuel consumption and high nitrogen oxide emission of traditional aviation gas turbine engines. The system comprises a propulsion system, a transmission system and a lubrication system; the propulsion system adopts parallel double shafts; the two connecting shafts can transmit power through the transmission system to realize two working modes of the ducted fan; the lubrication system sends lubricating oil to all shafts on the shaft. The high-temperature solid oxide fuel cell system is used to supply power to the motor through the direct current conversion device, and then the motor drives the ducted fan, so that the total efficiency and total thrust of the hybrid propulsion system are improved. The hydrogen-rich combustion chamber and the hydrogen-lean combustion chamber are added to the structure, so that the problem of fuel preheating of the high-temperature solid oxide fuel cell through the heat exchanger with complex pipelines is solved.

The invention discloses a hydrogen internal combustion engine injection control method based on pre-combustion chamber ignition, which comprises the following steps of: when a piston is positioned in a range of a crankshaft angle of 50-70 degrees before a compression top dead center, starting to inject hydrogen into a pre-combustion chamber; the hydrogen injection duration of the pre-combustion chamber is controlled to be smaller than a 5-degree crankshaft angle, and the equivalence ratio of the pre-combustion chamber during ignition is 0.8-1.2; when the piston is close to an upper dead center, a pre-combustion chamber spark plug is triggered to ignite, so that a pre-combustion chamber flame kernel is formed within a crankshaft angle of 1-5 degrees after ignition; flame of the pre-combustion chamber is sprayed into the main combustion chamber through the jet flow channel, multi-point ignition flame cores are formed in the main combustion chamber, and combustion of mixed gas formed by mixing hydrogen and air is promoted. And when the compression stroke is finished, hydrogen injection of the pre-combustion chamber is stopped, and the total injection duration angle does not exceed the 100-degree crankshaft angle before the lower dead center of the piston. According to the hydrogen internal combustion engine injection control method based on pre-combustion chamber ignition, by optimizing the time, duration and control strategy of pre-combustion chamber fuel injection and cooperating with a corresponding sensing and feedback adjusting mechanism, stable and rapid ignition and flame propagation of hydrogen lean combustion are achieved, and the combustion efficiency is improved. The lean burn limit is widened, NOx emission is reduced, and the heat efficiency of the engine is remarkably improved. The invention further discloses an engine system.

The invention relates to a diesel and natural gas dual-fuel engine lean burn system and an operation method, the diesel and natural gas dual-fuel engine lean burn system comprises a pre-combustion chamber, a dual-fuel injector system, a natural gas injection system, an exhaust back pressure adjusting system, a heat and power combined supply circulation system, a cold energy utilization system and the like, and engine fuel injection precision control is achieved through the dual-fuel injector system and the diesel injection system. Two working modes of a pure diesel oil combustion mode and a dual-fuel combustion mode are achieved, lean combustion of the engine is achieved through an exhaust back pressure adjusting system and pre-combustion chamber micro-jet ignition, the electric energy and heat energy requirements of the system are met through a heat and power combined supply circulation system, and cold energy is provided for equipment through a cold energy utilization system; and meanwhile, emission of combustion pollutants of the engine is reduced. And the economical efficiency, the dynamic property and the environmental protection property of the engine under the full-working-condition operation condition are improved.

The application relates to an engine control system, a control method and a vehicle, wherein the control system comprises: an exhaust sensor configured to detect gas information in an exhaust pipeline of the vehicle; and a controller configured to control the engine of the vehicle to switch between a rich combustion mode and a lean combustion mode according to the gas information detected by the exhaust sensor. The application has the beneficial effect of providing an effective switching control method by detecting the gas information in the exhaust pipeline of the vehicle, so that the duration of the rich combustion mode and the lean combustion mode is balanced.

The invention discloses an air cylinder working assembly, an air cylinder and a piston type engine, and relates to the technical field of engines, the air cylinder working assembly comprises an air cylinder sleeve and a piston, the piston can reciprocate in the air cylinder sleeve, the air cylinder sleeve comprises an upper half part and a lower half part, and the wall thickness of the upper half part is larger than that of the lower half part; a plurality of circles of cooling channels are formed in the outer wall of the upper half part, and cooling media circulate in the cooling channels; a plurality of ring grooves are formed in the outer wall of the piston, the ring grooves are used for installing piston rings, the piston rings are sequentially arranged in the length direction of the piston, the piston rings are arranged close to the upper end of the piston, the piston rings are divided into gas rings and oil rings, and the oil rings are arranged below the gas rings; the cylinder comprises a cylinder working assembly; the piston type engine comprises a combustion chamber and an air cylinder, and lean combustion or stratified combustion is adopted in the combustion chamber. Side abrasion of the air cylinder sleeve can be avoided, and then the reliability and durability of the piston type engine are improved.

An injection method for an injection device in the combustion chamber of an aircraft turbomachine, said injection device comprising an internal channel (6) surrounded by an external annular channel (8), said channels opening into said combustion chamber (4, 4') of said gas turbine, characterized in that it comprises an injection of a dihydrogen-air mixture (12a) with a hydrogen content exceeding the stoichiometric ratio into said internal channel (6) and an injection of air into said external annular channel (8) so as to produce, at the outlet of said internal channel (6), a first flame front (30) resulting from rich combustion surrounded by a second flame front (31) resulting from lean combustion. Figure 3

Method for ventilating an interior (1-1) of a vehicle (1), comprising the steps: Determine, by means of a control (10), a formation of a negative interior pressure in the interior (1-1) while a journey of the vehicle (1) is maintained, as an interior air mode; Determine (S50), by means of the control (10), an overproduction of a harmful gas in an exhaust gas using a fuel-air ratio or an acceleration position value (APS), determining a pressure quantity of an accelerator pedal, in an air conditioning system (7); Consider (S52, S53) the fulfillment of the formation of negative indoor pressure and the fulfillment of the overproduction of the harmful gas as a triggering condition, and mix outside air into the indoor space (1-1) in order to reduce the negative indoor pressure in the indoor air mode; and after mixing the outside air, taking into account (S60) the non-fulfillment of the overproduction of the harmful gas as a cancellation condition and blocking the outside air; Before the step of determining the formation of negative cabin pressure and determining the overproduction of the harmful gas in the exhaust gas, a throttle position value (DPS) and a vehicle speed are checked together with a fuel-air ratio, the acceleration position value (APS), a catalyst temperature, a coolant temperature, and a lean NO x -LNT front end temperature, diesel particulate filter (DPF) regeneration, exhaust gas recirculation (EGR) load and selective catalytic reducer (SCR) front end temperature using exhaust emission data; and determine (S40) whether an operating status of the air conditioning system (7) is in the indoor air mode.

The invention provides an oil injection control method and device of an ignition system, a storage medium and a vehicle, and belongs to the technical field of vehicles. The method comprises the steps that under the condition that an engine is in a cold start state, an oil injection strategy is determined based on the current engine water temperature; and based on the fuel injection strategy, the first fuel injector and the second fuel injector are controlled to conduct fuel injection operation. According to the embodiment of the invention, the ignition system is provided with the two fuel injectors and the spark plug, and the distances among the first fuel injector, the second fuel injector and the spark plug are reasonably arranged, so that after the first fuel injector and the second fuel injector are controlled to perform fuel injection matching, the distribution of mixed gas is more reasonable, and the mixed gas is easier to ignite. Thus, when the engine is started in a cold mode, stable ignition of the engine and stable combustion of flames can be achieved, and then it is ensured that the engine can be started smoothly; and meanwhile, the lean burn effect can be improved, the excess air coefficient is increased to 2.5 or above, oil consumption is effectively reduced, and the emission amount of pollutants is reduced.

The invention discloses an ignition and flameout modeling combustion chamber testing device and system and a flame characteristic research method, and belongs to the technical field of gas turbine combustion chamber testing. The test device comprises a combustion chamber, a swirler assembly, a fuel nozzle and a plurality of igniter mounting ports respectively corresponding to key flow field positions such as an inner backflow area, a main backflow area and an outer backflow area. A tower-type cyclone or a rotary sliding arc exciter can be selected as the cyclone assembly, and a gas supply system, an oil supply system, an ignition system and an optical test system are integrated in the test system. The method comprises the following steps of: igniting by using different igniters or at different positions, capturing a flame development process by utilizing high-speed imaging, and performing flame mode diagnosis by combining image processing, flame mode diagnosis based on a non-dimensional number, POD, DMD and other methods. Influences of different ignition modes and ignition positions on a flame propagation path, an ignition success rate, ignition delay, flame stability and lean-burn ignition limit and internal physical mechanisms thereof are systematically analyzed.

This suppresses both the occurrence of torque shock and the increase in NOx emissions when switching between stoichiometric and lean combustion. [Solution] The processing circuit 22 of the electronic control unit 21 that controls the hydrogen engine 10 is configured to inject the amount of fuel necessary to generate engine torque according to the required torque as the main injection during the air amount adjustment period for switching between stoichiometric combustion and lean combustion, and to inject the amount of fuel as the post injection such that the total injection amount of the main injection and the post injection is the amount obtained by dividing the actual air amount by the stoichiometric air-fuel ratio.

The utility model discloses a low-nitrogen burner which comprises a shell, and the shell is provided with a plurality of fire hole groups communicated with an airflow channel at the other end of the airflow channel; the fire hole group comprises a first fire hole and a second fire hole; according to the low-nitrogen combustor, single-area combustion is formed in each fire hole set, multiple single-area combustion is formed in the multiple fire hole sets, and combustion is more stable; in each fire hole group, fuel gas passes through the gas inlet and the gas flow channel to form a low-speed flow area at the position of the first fire hole, the fuel gas passes through the gas inlet and the gas flow channel to form a high-speed flow area at the position of the second fire hole, the fuel gas realizes rich combustion in the low-speed flow area, and the fuel gas realizes lean combustion in the high-speed flow area, so that the formation of NOx is reduced; and the low-nitrogen combustor is of an integral combustion structure and is good in sealing performance, simple in structure and low in cost. The utility model discloses a gas water heater which comprises the low-nitrogen burner, reduces NOx formation, and is simple in structure and low in cost.

The invention discloses a hydrogen passive pre-combustion chamber control method based on residual gas content closed-loop integration, which comprises the following steps of: measuring residual gas pressure in real time and estimating residual gas content through a pressure sensor in a pre-combustion chamber, and only establishing a mapping relationship between the residual gas content and intake valve timing (VVT), a mapping relationship between the residual gas content and an ignition advance angle in an ECU (Electronic Control Unit); after the real-time residual gas content is compared with a preset threshold value, the intake valve closing phase (delay VVT), the throttle opening degree and the backward-moving ignition advance angle are dynamically adjusted, so that short-time high-pressure replacement pulses are formed, and pre-combustion is restrained; and when the residual gas content is reduced to the target level, the VVT, the throttle valve and the ignition advance angle are automatically recovered to the optimal value of ultra-lean combustion. According to the invention, closed-loop self-adaptive cleaning of residual gas is realized, and the precombustion chamber is ensured to be filled with fresh mixed gas and stably ignited under various working conditions.

The invention discloses a turbine engine hybrid power system integrating a flame fuel cell between turbine stages, which comprises a gas compressor, a combustion chamber, a high-pressure turbine and a low-pressure turbine, and further comprises a rich combustion chamber, a fuel cell stack, a lean combustion chamber, a fuel storage tank and a flow divider, the rich combustion chamber, the fuel cell stack and the lean combustion chamber form a flame fuel cell system and are arranged between turbine stages of the engine; high-temperature fuel gas exhausted by the high-pressure turbine is used for directly providing a high-temperature oxidizing agent without additional preheating for the fuel cell, fuel gas is prepared through rich combustion, and efficient power generation of the fuel cell is achieved. Tail gas containing unreacted fuel at an outlet of the fuel cell is reburnt in the lean-burn combustion chamber, the low-pressure turbine is driven to do work after secondary heating is conducted on air flow, and the effect of increasing thrust of interstage combustion is achieved. The system is simple in structure and reasonable in layout, waste heat and space between turbine stages are utilized, a thermal management system of the fuel cell is remarkably simplified, and efficient cooperation of propulsion and power generation functions is achieved.

This invention relates to the field of aerospace engine technology, providing a hydrogen fuel combustion chamber with a high-mixing-degree main combustion stage, including a flame tube with a front end and a rear end; a gas distribution assembly, configured in a disc shape and connected to the front end of the flame tube, the gas distribution assembly radially from the inside out including a pre-combustion stage gas supply region, a first main combustion stage gas supply region, and a second main combustion stage gas supply region; the pre-combustion stage / first main combustion stage / second main combustion stage gas supply regions are annular, these gas supply regions include several swirl vanes or spokes, each swirl vane or spoke having a hydrogen injection hole, every two adjacent swirl vanes or spokes being continuous along the length of the flame tube to form an air intake channel. With the above configuration, the mixing uniformity of hydrogen and air is improved compared to traditional single-row hydrogen injection holes, the combustion efficiency reaches over 99.9%, and at the same time, local rich or lean combustion regions are eliminated, NO... x Emissions reduced by 40%.

The invention provides a lean-burn reliable ignition system structure of a special hybrid engine based on multiple spark plugs and a pre-combustion chamber and a control method of the lean-burn reliable ignition system structure. The structure comprises an engine body, a pre-combustion chamber, a side ignition unit and an external control module. The structure is lower in sensitivity to knocking boundaries and loads, and the combustion process of the internal combustion engine can be more controllable. According to the structure, the advantages of the three spark plugs and the precombustion chamber structure are combined, the fuel consumption rate of an engine can be effectively reduced, and meanwhile the circulation fluctuation rate of the engine in the combustion process is reduced. The ignition system can also flexibly adjust three spark plugs, an active / passive pre-combustion chamber, and a side spark plug and a pre-combustion chamber for cooperative ignition according to specific engine working conditions such as the air-fuel ratio, the rotating speed, the torque and the EGR rate, and the most reasonable ignition strategy under the complex working conditions can be achieved.