51results about How to "Improve thermal management performance" patented technology

The invention provides a phase change composite, a preparation method and an application. The phase change composite is prepared from paraffin powder, expanded graphite powder, polyethylene particlesand SEBS. By adopting a material system in a special ratio, the defects that the conventional phase change energy storage material is low in thermal conductivity and required to be encapsulated in practical use to prevent leakage are overcome, thermal management efficiency is increased greatly, and popularization and application range of the phase change energy storage material is expanded.

A pulsed-jet active flowfield control actuation system enhances the rate of heat transfer and heat removal in a heat exchanger for better management of thermal loads. The pulsed jet actuators impart an unsteady component of velocity to the working fluid of the heat exchanger. This design increases the convective heat transfer, and avoids increases in heat exchanger volume and weight for a given performance value.

The invention provides an internal middle frame board of an electronic device and a forming method of the internal middle frame board. The internal middle frame board comprises a main frame board body and a special structure body formed on the main frame board body. The special structure body is formed by directly combining powder materials with a spraying accumulation body on the surface of the main frame board body in a spraying accumulation mode. The special structure body is formed on the main frame board body through the method of gold gas dynamic spray, and then the internal middle frame board is formed through little machining or without machining. The internal middle frame board has a good thermal management function, and solves the problem that it is difficult for an internal middle frame board of an existing electronic device to be light and thin and achieve the good thermal management function at the same time.

The invention discloses a multifunctional turbofan jet engine which includes a fan, a gas compressor, a second combustor, a turbine and an exhaust nozzle, wherein the fan is used for sucking air, the gas compressor is used for doing work on the sucked air, the second combustor is used for igniting gas on which the gas compressor does work, and the exhaust nozzle is used for exhausting the combusted gas. The multifunctional turbofan jet engine further comprises a first combustor, a first splitter plate and a second splitter plate, wherein the first combustor is arranged in front of the second combustor, the first splitter plate and the second splitter plate are used for splitting gas, the first splitter plate and the first combustor are correspondingly arranged, the second splitter plate and the second combustor are correspondingly arranged, and the first splitter plate and the second splitter plate are respectively provided with a travel switch I and a travel switch II which are used for rotating the corresponding splitter plate. The invention aims to provide the multifunctional turbofan jet engine which has the advantages of inlet air cooling, accurate gas splitting, balanced ignition, uniform-velocity starting, level-changing acceleration, high-efficiency, safety, thrust vectoring, easy operation and versatility.

The invention belongs to the technical field of energy devices, and discloses a high-thermal conductivity flexible electrode material and a preparation method and application thereof. The flexible electrode material comprises a high-thermal conductivity flexible substrate material and an active material loaded on the surface of the high-thermal conductivity flexible substrate material, wherein the thermal conductivity of the high-thermal conductivity flexible substrate material is over 100Wm<-1>K<-1>. According to the preparation method, the high-thermal conductivity flexible substrate material is adopted as a substrate, the active material is loaded on the surface of the substrate and the flexible substrate and the active material form a whole electrode material. The prepared flexible electrode material has flexibility, good conductivity and excellent thermal conductivity. Meanwhile, the preparation technology has the advantages that the process is simple and the device is convenient to assemble. According to the energy device assembled by the electrode material, effective heat management can be carried out, and the heat dissipation capability of the energy device is improved, thereby ensuring the stability, the security and the service life of the energy device when working.

The invention provides a vehicle thermal management method and device, a vehicle and a storage medium. The method comprises the steps of acquiring vehicle working condition data and vehicle driving environment data; analyzing the vehicle working condition data and the vehicle driving environment data to obtain battery temperature data; and adjusting and controlling parameters of equipment in a cooling system by adopting a preset strategy according to battery temperature data. According to the invention, since the future battery temperature is predicted by combining the vehicle working condition data and the vehicle driving environment data, prospective prediction of the battery temperature is realized, the thermal management of the vehicle is realized according to the predicted battery temperature data, and the active vehicle thermal management is realized; and thermal management precision and thermal management efficiency can be effectively improved, and a thermal management effect iseffectively increased.

The invention belongs to the technical field of lasers, and discloses a heat-pipe-type alkali-metal vapor laser device which is used for solving the problem that vapor coagulates on windows in an existing alkali-metal vapor laser device. A gain unit is designed to be of a heat pipe structure. A left window and a right window are arranged at the two ends of a pipe shell and sealed. The center of the pipe shell is sleeved with a heater. A left refrigerator and a right refrigerator are symmetrically arranged at equidistant positions of the two ends of the heater. The space between the left refrigerator and the heater is filled with a left thermal insulation material layer, and the space between the right refrigerator and the heater is filled with a right thermal insulation material layer. The pipe shell is lined with a liquid absorption core, and the liquid absorption core extends from the left end of the left refrigerator to the right end of the right refrigerator in the length direction. A left inflation inlet is formed between the left window and the left refrigerator and is adjacent to the left window, and a right inflation inlet is formed between the right window and the right refrigerator and is adjacent to the right window. A resonant cavity is of an L-shaped structure formed by an output mirror, a totally-reflecting mirror and a polarization beam splitter, the output mirror is arranged above the polarization beam splitter, and the totally-reflecting mirror is arranged on the right of the polarization beam splitter. The gain unit is placed between the polarization beam splitter and the totally-reflecting mirror.

The invention discloses a thermal management system and method for a high temperature solid fuel cell stack. The system comprises an adiabatic chamber, an electric heater II, an electric heater III, agas separator and an ammonia gas supply device. The cell stack is placed in the adiabatic chamber, a catalyst coating is sprayed at the outer surface of the cell stack, a way is branched from an oxidation gas inlet and is converged with an oxidation gas outlet and the ammonia gas supply device through a pipeline and is then connected to an air inlet of the adiabatic chamber, the electric heater III and the air inlet of the adiabatic chamber are connected by a pipeline, the gas separator is internally equipped with a hydrogen permeation membrane, and the air inlet of the gas separator is connected to the air outlet of the adiabatic chamber. During hot start of the cell stack, air flow heats the inside and outside of the cell stack simultaneously, during running, a mixed gas of ammonia andoxidation gas is injected into the adiabatic chamber for cracking reaction to absorb the heat of the cell stack, thus cooling the cell stack. The system and method provided by the invention shorten the hot start time of the cell stack, and improve the thermal management ability of the cell stack and the cell stack temperature distribution uniformity.

The invention provides an imaging sensor packaging structure based on a glass substrate. The imaging sensor packaging structure comprises a transparent glass substrate, wiring structures are arranged on the front face and the back face of the glass substrate respectively and electrically connected mutually, at least one transparent area is arranged on the glass substrate and does not contain the wiring structures, inverted image sensing chips are attached to the back face of the glass substrate in a flip-chip bonding mode, and the sensing faces of the image sensing chips face toward the transparent area of the glass substrate; the image sensing chips are electrically connected with the wiring structures outside the transparent area on the back face of the glass substrate; heat sinks are fixed to the back faces of the image sensing chips; passive devices and image sensor driving chips are attached to the portion outside the transparent area on the front face of the glass substrate and electrically connected with the wiring structures of the front face; BGA welded balls are embedded into the area, where the wiring structures are located, of the back face of the glass substrate. The parallelism degree between the sensing faces of the image sensing chips and the glass substrate plane and the heat dissipation effect are better.

The invention provides a temperature control assembly and a battery pack. The temperature control assembly comprises a first side plate, a second side plate and a first buffer plate. The first side plate is provided with a first limiting protrusion which is located in a projection area of the first buffer plate on the first side plate. The second side plate is provided with a second limiting protrusion which is located in the projection area of the first buffer plate on the second side plate. In the using process of the battery pack, batteries can generate an expansion force, and due to inclined arrangement of the first buffer plate, the first buffer plate is easy to bend and deform under the action of the expansion force so as to timely absorb the expansion force of the batteries so thatthe temperature control assembly is ensured to meet the expansion force requirement of the batteries. In the bending deformation process of the first buffer plate, the first buffer plate abuts againstthe first limiting protrusion and the second limiting protrusion so that bending deformation of the first buffer plate is limited, the temperature control assembly still has a ventilation space meeting a thermal management requirement, and the thermal management performance of the temperature control assembly on the batteries is improved.

The invention discloses a super-continuum spectrum fiber laser to solve the problem that a high power super-continuum spectrum fiber laser in the prior art has low efficiency in coupling of pump light. The laser comprises a pulse laser seed resource, a power pre-amplifier, a first mode field matcher, a main power amplifier, a second mode field matcher and photonic crystal fibers. The pulse laser seed resource gives out a first pulse laser, which passes through the power pre-amplifier to produce a second pulse laser; the second pulse laser passes through the first mode field matcher to produce a third pulse laser; the third pulse laser passes through the main power amplifier to produce a fourth pulse laser; and the fourth pulse laser is coupled into the photonic crystal fibers through the second mode field matcher to generate the super-continuum spectrum laser. The first mode field matcher is used to improve the quality of light beam of the second pulse laser; and the second mode field matcher is used to reduce the coupling loss when the fourth pulse laser enters the photon crystal fibers.

The embodiment of the invention relates to the technical field of battery heat radiation, in particular to a new energy source commercial vehicle battery pack and an electric vehicle. The new energy source commercial vehicle battery pack comprises a box body, a liquid cooling assembly, a sealing ring, a sealing element, a plurality of conflux elements and a plurality of battery modules, wherein the liquid cooling assembly is provided with a plurality of liquid cooling plates; the box body comprises an accommodating cavity with an opening; the liquid cooling assembly is arranged in the accommodating cavity; each battery module is fixedly attached to each liquid cooling plate; all of the conflux elements are arranged among the plurality of battery modules in a staggered way; each conflux element is electrically connected with every two battery modules so as to form a module structure with two free ends; the sealing ring is arranged at the edge of the opening; the sealing element is buckled in a position, far away from the opening edge, of the sealing ring. The new energy source commercial vehicle battery pack has the advantages that the local targeted heat management can be performedon a battery; the heat management effect is improved.

The invention provides a lithium ion battery photo frame filled with a phase change material. The photo frame comprises a photo frame body forming a photo frame module; a battery cell cavity for arranging a battery cell and a phase-change material filling cavity for filling the phase-change material are arranged in the photo frame body; the phase-change material filling cavity is arranged outsidethe battery cell cavity in a surrounding manner to cool the battery cell in the battery cell cavity; the phase-change material filling cavity is provided with an exhaust hole which is communicated with the outside and is used for balancing internal and external pressure, an acting surface, welded to a battery cell tab, of the photo frame body is arranged in an opening manner, and an aluminum sheetis arranged between the phase-change material filling cavity and the battery cell cavity of a symmetric acting surface with the maximum area of the photo frame body. According to the invention, the space of the battery and the whole vehicle is saved, the thermal resistance in the heat conduction process can be reduced, the consistency of the temperature of the battery is effectively improved, thesystem temperature difference is reduced, the thermal management performance is improved, the service life of the battery is prolonged, the battery electric quantity is saved, and safety and reliability are realized.

The invention provides a battery pack cooling structure and a battery pack, and relates to the technical field a power battery. The battery pack cooling structure comprises a tray and cooling units fixedly arranged on the tray; each cooling unit comprises a liquid cooling pipe and a thermal insulation pipe sleeve for packaging the liquid cooling pipe; the lower surface of each thermal insulation pipe sleeve is fixedly connected with the upper surface of the tray; each liquid cooling pipe comprises a cooling plate fixedly arranged below a battery module and a cooling pipe packaged in the thermal insulation pipe sleeve; and the cooling plate and the cooling pipe are in contact and fixedly connected. The battery pack cooling structure provided by the invention has the characteristics of highpracticability and excellent thermal management performance.

The invention discloses a thermal management method of an IGBT module and a storage medium, and the method comprises the following steps: S100, obtaining the fundamental frequency junction temperature data of the IGBT module according to the wind speed and air temperature data of at least one year and a power loss model of the IGBT module; s200, extracting low-frequency junction temperature data from the fundamental frequency junction temperature data by adopting a cycle counting method, and calculating low-frequency life consumption and fundamental frequency life consumption of the IGBT module by utilizing an IGBT life model and a linear cumulative damage rule; s300, selecting a junction temperature fluctuation type with a higher proportion in the low-frequency life consumption and the fundamental-frequency life consumption as an emphatically suppressed junction temperature fluctuation type, and quantitatively analyzing a distribution rule of the life consumption with the higher proportion, thereby determining a target junction temperature fluctuation amplitude; s400, calculating the junction temperature threshold value of the junction temperature fluctuation type needing to be suppressed, the corresponding electrical parameter value and the thermal management working interval, and adjusting the electrical parameter to control the junction temperature of the IGBT module not to exceed the junction temperature threshold value. According to the thermal management method of the technical scheme, the effectiveness of thermal management can be improved, and the service life of the IGBT module is prolonged.

The invention relates to a battery module, comprising multiple battery monomers and multiple heat conducting partition plates. The heat conducting partition plates and the battery monomers are mutually superposed in arrangement, the heat conducting partition plates are provided with a partition plate main body and multiple side plates connected with the partition plate main body, the partition plate main body and the multiple side plates form a containing space of the battery monomers together, and the edges of the side plates, which are far away from the partition plate main body, are bent and stretched to form heat dissipation fins.

The invention provides a vehicle and an engine cooling system for the same. The engine cooling system comprises a cylinder water jacket, an engine oil cooler connected with the cylinder water jacket,a first water pump connected with the engine oil cooler and selectively connected with the cylinder water jacket and an EGR cooler, and a water inlet of the EGR cooler is selectively connected with the first water pump while a water outlet of the same is selectively connected with the engine oil cooler and / or the first water pump. The engine cooling system can utilize the EGR cooler to recycle heat of waste gas and supply the same to the engine oil cooler, so that temperature of engine oil in the engine oil cooler is quickly increased under low load; bypass waste gas is cooled under high load,so that negative impact on performance of a catalyst caused by the fact that high-temperature waste gas is directly discharged into the three-way catalyst is avoided.

The invention discloses a heat treatment device with a temperature control heat pipe. The device comprises the temperature control heat pipe, wherein the temperature control heat pipe is formed by an evaporation section, a condensation section and a gas storage chamber; the evaporation section is arranged at the bottom of an inner cavity of the temperature control heat pipe; the condensation section is arranged in the middle of the inner cavity of the temperature control heat pipe; the condensation section is provided with a drainage pipe for heat exchange; a condensate return pipe is arranged at the bottom of the condensation section; the gas storage chamber is arranged at the top of the inner cavity of the temperature control heat pipe; a baffle at one side of the gas storage chamber divides the condensation section into a first condensation section and a second condensation section; the first condensation section is arranged at the side, close to the condensation section, of the evaporation section; and the second condensation section is arranged on the side, close to the condensation section, of the gas storage chamber. According to the device, the space occupied by the non-condensable gas is influenced by changing the heating power, so that more row pipes participate in heat exchange, the temperature of a working medium of the heat pipe is basically kept unchanged, and the effects of temperature control and heat management are achieved.

The invention relates to a vehicle neutral sliding control method, an automatic gearbox and a vehicle. The control method comprises the steps that a first running state parameter of the vehicle is obtained; judging whether the first running state parameter meets a first preset condition or not; if yes, the vehicle is controlled to enter a neutral sliding state; acquiring a second running state parameter of the vehicle; judging whether the second running state parameter meets a second preset condition or not; if yes, the vehicle is controlled to exit the neutral sliding state. According to the control method for neutral sliding of the vehicle, the frequency of entering and exiting of the neutral sliding mode is reduced, the time proportion of neutral sliding is increased, the fuel consumption of the whole vehicle is reduced, and the thermal management performance is improved.

The invention discloses a storage battery fixing mechanism, a storage battery module assembly and an automobile. The storage battery fixing mechanism comprises an upper cover plate, a lower cover plate, a first cooling frame and a second cooling frame, wherein the upper cover plate is fixedly connected with the lower fixed cover plate through a bolt; the storage battery is fixedly arranged between the upper cover plate and the lower cover plate; the first cooling frame comprises a plurality of first partition plates which are uniformly distributed in parallel; the second cooling frame comprises a plurality of second partition plates which are uniformly distributed in parallel; and the arrangement directions of the first partition plate and the second partition plates are vertical to each other. According to the storage battery fixing mechanism, the storage battery module assembly and the automobile, storage batteries are fixed and pressed between the upper cover plate and the lower cover plate through the arrangement of the upper cover plate and the lower cover plate, so that fixing of the storage batteries in the vertical direction is achieved; the first cooling frame and the second cooling frame fixedly sleeve the storage batteries through the arrangement of the first cooling frame and the second cooling frame, so that fixing of the storage battery in the horizontal direction is achieved; and the radiating capability of the storage batteries is ensured through the first partition plates and the second partition plates.

The invention relates to a whole vehicle heat management method and device for an extended-range vehicle model. The method comprises the following steps: recognizing the type of a heat management request signal when the heat management request signal is received; determining a corresponding input variable and a regulation and control object according to the type, wherein the input variable is selected from vehicle state parameters; and performing fuzzy control on the regulation and control object according to the input variable. A power fuzzy control mode is adopted, so that data calibration and working condition simulation are not needed, a large amount of data calibration is saved, and the problem that a control strategy is unreasonable due to incomplete data calibration is fundamentallysolved; and the complexity of the control strategy is reduced, the heat management effect of the whole vehicle is improved, and the unexpected effect of the whole vehicle is avoided.

The invention relates to an automatic gearbox operation control method, an automatic gearbox and a vehicle. The control method comprises the steps that a first operation state parameter of the vehicle is obtained; judging whether the first running state parameter meets a first preset condition or not; the automatic gearbox is controlled to enter a neutral sliding state according to the first running state parameter meeting a first preset condition; acquiring an opening parameter of an accelerator pedal; judging whether the opening parameter meets a second preset condition or not; and the automatic gearbox is controlled to exit the neutral sliding state according to the opening parameter meeting a second preset condition. According to the control method provided by the invention, the entering and exiting frequency of the neutral sliding mode is reduced, the time proportion of neutral sliding is increased, the fuel consumption of the whole vehicle is reduced, and the thermal management performance is improved.

The invention provides an engine control method and device. The engine control method comprises the steps that conventional parameters of an engine are obtained; a current engine mode of an engine body is obtained; a variable relation table corresponding to the engine mode is called according to the engine mode; and calculation is carried out based on the conventional parameters and control parameters corresponding to conventional data in the variable relation table, and the required opening degree of an ETV valve is determined. According to the scheme, the variable relation table corresponding to the engine mode of the current engine is called, calculation is conducted according to the conventional parameters of the engine and the control parameters corresponding to the conventional data in the variable relation table, and therefore the required opening degree of the ETV valve is determined. By means of the manner of determining the required opening degree of the ETV valve, the engine heat management effect and the exhaust control stability can be improved, and the engine exhaust treatment stability can be improved.

The invention discloses a power battery module, a power battery pack and a heat management method thereof, the power battery module comprises a plurality of battery cell units, a plurality of heat pipe structures with ends embedded among the battery cell units, and liquid channels connected to the other ends, not embedded into the battery cell units, of the heat pipe structures, each battery cell unit comprises a positive current collector, a positive electrode material, a diaphragm, a negative electrode material and a negative current collector which are arranged in sequence; two sides of the heat pipe structure are tightly attached to the positive current collector or the negative current collector respectively; the two sides of the heat pipe structures are tightly attached to the current collectors of the battery cell units, so that the heat transfer resistance can be reduced, the heat dissipation / preheating speed can be greatly increased, the heat management effect of the power battery can be improved, and the heat exchange efficiency can be improved.

The invention provides a multi-array planar heat tube which is made of planar extruded sectional materials. The outer surface of the multi-array planar heat tube is a plane and is made of metal such as aluminum and copper and non-metal materials. The multi-array planar heat tube comprises a plurality of micro-holes which are arranged in an array mode. Each micro-hole is of an independent structure and is tubular. A plurality of fins are arranged on the surfaces in the micro-holes, the fins are parallel to one another, the intervals between the adjacent fins are equal, grooves are formed between the adjacent fins, and therefore the grooves which are distributed periodically are formed. According to the multi-array planar heat tube, the temperature of the whole plane can be kept uniform easily, the axial heat transmission speed of the planar heat tube is increased, the heat transmission performance between an LED light source and a radiator is improved, heat resistance between the LED light source and the radiator is reduced, therefore, the heat management performance of the LED light source is improved and the cost of the LED light source is reduced. When the multi-array planar heat tube is used in a solar photo-electric water heating system, the heat exchanging area can be increased, the heat exchanging efficiency is improved and the photovoltaic power generating efficiency is indirectly improved.

The invention relates to a control device and method of a flexible battery thermal management system, a battery and a vehicle. Comprising a battery monomer, a flexible top pipe, a battery lower box body, a flexible side pipe, an electromagnetic fixer and a sliding rod, the lower end of the flexible jacking pipe is fixed on the battery monomer; the sliding rods are fixed on the two sides of the battery monomers; the flexible side pipe is fixed on the sliding rod through the electromagnetic fixer; one end of the flexible side pipe is connected with a whole vehicle water pump; the other ends of the flexible side pipes are connected with the flexible side pipes on the two sides of the battery monomers; the other side of the flexible side pipe is connected with a loop of a battery heat management system (BMS); the electromagnetic fixer is connected with the whole vehicle HCU; and the single batteries are connected with the battery management system BMS. When thermal runaway happens to the single battery, the anti-explosion valve can break through the flexible jacking pipe, the cooling liquid flows out, flames of the single battery are extinguished, and thermal runaway is delayed. The temperature consistency of the power battery can be ensured, the thermal runaway of the battery is delayed, the safety performance of the system is improved, and the thermal management performance and the service life of the battery liquid cooling plate are improved.

An integrated cooling and lubricating system for an electric drive assembly belongs to the technical field of motor drive systems and comprises a motor assembly and a speed reducer assembly which are assembled and connected, the motor assembly comprises a rotor assembly and a stator assembly, and an oil cooling assembly is arranged on the motor assembly. An oil outlet of the oil cooling assembly is communicated with an oil way I and an oil way II, the oil way I enters the rotor assembly through the speed reducer assembly, and the oil way II enters the other end of the stator assembly through one end of the stator assembly. The heat management performance and the system reliability of the electric drive assembly are effectively improved, the problem that current of a motor shaft under a high-pressure platform corrodes a bearing can be solved, and high-pressure, high-power and high-rotating-speed development of the electric drive assembly is facilitated.

The invention provides an image sensor packaging structure based on a glass substrate, which includes a transparent glass substrate, the front and back of the glass substrate are provided with wiring structures and are electrically connected to each other; In the transparent area of ​​the structure, the inverted image sensor chip is mounted on the back of the glass substrate by flip-chip welding, and the sensing surface of the image sensor chip faces the transparent area of ​​the glass substrate; the image sensor chip and the back of the glass substrate The wiring structure outside the transparent area is electrically connected; the heat sink is fixed on the back of the image sensor chip; the passive device and the image sensor driver chip are mounted on the front of the glass substrate outside the transparent area and electrically connected to the wiring structure on the front; BGA solder balls are planted in the region where the wiring structure on the back of the glass substrate is located. The image sensing chip of the present invention has better parallelism between the sensing surface and the plane of the glass substrate, and has better heat dissipation effect.

The invention discloses a thermal management system and method for a high temperature solid fuel cell stack. The system comprises an adiabatic chamber, an electric heater II, an electric heater III, agas separator and an ammonia gas supply device. The cell stack is placed in the adiabatic chamber, a catalyst coating is sprayed at the outer surface of the cell stack, a way is branched from an oxidation gas inlet and is converged with an oxidation gas outlet and the ammonia gas supply device through a pipeline and is then connected to an air inlet of the adiabatic chamber, the electric heater III and the air inlet of the adiabatic chamber are connected by a pipeline, the gas separator is internally equipped with a hydrogen permeation membrane, and the air inlet of the gas separator is connected to the air outlet of the adiabatic chamber. During hot start of the cell stack, air flow heats the inside and outside of the cell stack simultaneously, during running, a mixed gas of ammonia andoxidation gas is injected into the adiabatic chamber for cracking reaction to absorb the heat of the cell stack, thus cooling the cell stack. The system and method provided by the invention shorten the hot start time of the cell stack, and improve the thermal management ability of the cell stack and the cell stack temperature distribution uniformity.

The invention provides a vehicle and an engine cooling system for the same. The engine cooling system comprises a cylinder water jacket, an engine oil cooler connected with the cylinder water jacket,a first water pump connected with the engine oil cooler and selectively connected with the cylinder water jacket and an EGR cooler, and a water inlet of the EGR cooler is selectively connected with the first water pump while a water outlet of the same is selectively connected with the engine oil cooler and / or the first water pump. The engine cooling system can utilize the EGR cooler to recycle heat of waste gas and supply the same to the engine oil cooler, so that temperature of engine oil in the engine oil cooler is quickly increased under low load; bypass waste gas is cooled under high load,so that negative impact on performance of a catalyst caused by the fact that high-temperature waste gas is directly discharged into the three-way catalyst is avoided.