74 results about "Glow plug" patented technology

A precombustion chamber igniter with a retractable electric glow plug and a cold start control method for a methanol engine are provided. The precombustion chamber igniter includes a fuel injector, a spark plug, and an electric glow plug. The electric glow plug is retractable and has two working positions, at a first position, a heating segment is wholly located in an injection chamber to provide heat energy for the injection chamber, and at a second position, the heating segment is partially located in the injection chamber and passes through a first through hole, and the rest of the heating segment is located in a main combustion chamber of an engine, to provide heat energy for the injection chamber and the main combustion chamber. In a cold start stage of the engine, the heating segment of the electric glow plug is controlled to be located at the second position.

The invention discloses a methanol engine glow plug temperature control method and device, and relates to the field of engine glow plug temperature control. The control method comprises the steps that the rotating speed of a target engine, the methanol real-time injection amount and the glow plug real-time temperature are obtained; the optimal temperature of the glow plug is obtained according to the rotating speed and the real-time methanol injection amount; and performing temperature compensation on the glow plug according to a difference value between the real-time temperature of the glow plug and the optimal temperature of the glow plug. According to the control method, dynamic accurate closed-loop control over the temperature of the glow plug at different rotating speeds of the engine and the methanol temperature of the methanol injection amount is effectively achieved, it is guaranteed that dynamic combustion of methanol fuel in an engine cylinder is optimal, and efficient and clean utilization of the methanol fuel on the engine is assisted. The control device comprises an electronic control unit, a glow plug and a rotating speed sensor, the electronic control unit is used for executing the steps of the control method, the glow plug is used for temperature compensation in an engine combustion chamber, and the rotating speed sensor is used for obtaining the rotating speed of the engine.

The utility model provides a glow plug with strong durability, which relates to the technical field of glow plugs, and comprises a main body mechanism, the main body mechanism comprises a glow plug body, a heating tube is sleeved in the glow plug body, the heating tube is in sliding connection with the glow plug body, the outer surface of the heating tube is fixedly connected with a fixed block, and the fixed block is fixedly connected with the glow plug body. A limiting block is arranged on one side face of the fixing block. According to the electric heating plug, the main body mechanism is arranged, and the electric heating plug body and the heating tube can be separated, so that when the heating tube is damaged, the heating tube can be replaced, parts which do not need to be replaced can be continuously used, the durability of the electric heating plug is higher, and meanwhile, a part of use cost of the electric heating plug is also saved; and the guide groove is arranged, so that the heating tube can be positioned and mounted, and the fixed block can be positioned at a proper position.

The invention provides a glow plug hot surface ignition methanol machine adopting high-pressure rotational flow umbrella spraying, which relates to the technical field of methanol engines, and comprises a combustion chamber defined by a cylinder body, a piston and a cylinder cover, a methanol rotational flow umbrella spraying ejector and a glow plug, the piston is arranged in the cylinder body, and the cylinder cover is arranged at the top of the cylinder body; the piston is connected to the connecting rod; the methanol rotational flow umbrella spraying ejector is arranged in the cylinder cover and is communicated with the combustion chamber; the methanol rotational flow umbrella spraying ejector is used for spraying methanol into the methanol cylinder to form methanol umbrella-shaped spray; the glow plug is arranged in the cylinder cover and is communicated with the combustion chamber; and the glow plug is used for igniting the methanol umbrella-shaped spray sprayed into the cylinder body. According to the invention, the cylinder cover is punched and additionally provided with the glow plug, the methanol rotational flow umbrella spray ejector is arranged in the center of the cylinder cover, the methanol rotational flow umbrella spray ejector ejects methanol umbrella-shaped spray, and the methanol umbrella-shaped spray does not have a fuel rarefied area between methanol oil beams, so that efficient and clean diffusion combustion of the methanol machine can be realized.

The invention provides a compression ignition type methanol engine which comprises an air cylinder and a piston located in the air cylinder, a combustion chamber is defined between the air cylinder and the top of the piston, and the compression ignition type methanol engine further comprises an air inlet part, an oil sprayer and a glow plug. The air inlet part is arranged at the top of the cylinder, communicates with the combustion chamber and is suitable for guiding outside air into the combustion chamber. The oil sprayer is arranged at the top of the air cylinder and suitable for spraying methanol fuel to the combustion chamber so as to form mixed gas with external air. The glow plug is installed on the top of the air cylinder, the glow plug is provided with a heating end which extends into the combustion chamber to heat the mixed gas, and the heating end is constructed to generate displacement close to or away from the oil sprayer in response to at least one of the engine rotating speed, the accelerator pedal opening degree and the air inlet temperature.

The invention provides a pure ammonia engine system and a control method thereof. The pure ammonia engine system comprises a cylinder block; the air cylinder cover covers the air cylinder body, and a combustion chamber is formed between the air cylinder cover and the air cylinder body; the glow plug comprises a heating body which extends into the combustion chamber from the center of the cylinder cover; the controller is configured to regulate and control the temperature of the hot surface of the heating body based on the operation condition of the pure ammonia engine system; the liquid ammonia ejector is inserted into the combustion chamber from the cylinder cover and is positioned on one side of the glow plug; the spark plug is inserted into the combustion chamber from the cylinder cover and is positioned on the other side, radially opposite to the liquid ammonia ejector, of the glow plug; a plurality of spraying hole sets are formed in the side, facing the heating body, of the end, extending into the combustion chamber, of the liquid ammonia ejector, so that part of liquid ammonia mist sprayed out of the liquid ammonia ejector is filled around the heating body to be ignited by a sparking plug.

The invention belongs to the technical field of engines, discloses a methanol engine combustion system, a control method and a methanol engine, and realizes more stable combustion during cold start and low-load working condition operation of the methanol engine through a glow plug; alpha is limited to be smaller than beta, and the vortex motion direction in the combustion chamber is the piston circumferential direction from the first reference surface to the second reference surface and passing through the preset plane, so that methanol injected into the combustion chamber through the methanol injection hole corresponding to the first reference surface can be guided by the vortex motion in the combustion chamber, and the methanol can be injected into the combustion chamber. The ignition time of the methanol injected into the combustion chamber from the methanol injection hole corresponding to the first reference surface by the glow plug is shortened, namely, the ignition delay period of the methanol is shortened; and then flame generated by combustion of methanol ignited by the glow plug is utilized to sequentially ignite methanol injected into the combustion chamber from other methanol injection holes, so that controllable combustion of direct injection methanol in the cylinder is realized.

A burner assembly (1) for a mobile fuel-operated heater, in particular for a vehicle, comprises an evaporator (20) configured to evaporate a fuel supplied to it, an evaporator receptacle (24) designed to receive the evaporator (20), a peripheral wall (16) defining a combustion chamber (14) in which a gas mixture containing the evaporated fuel can be combusted, wherein the peripheral wall (16) defines a central axis (M), a glow plug (10) with a shaft section (12) comprising a glow element, which is configured to convert a current flowing through it when a voltage is applied into heat for igniting the gas mixture, and a first opening (15) formed in the peripheral wall (16) of the combustion chamber (14) and through which the shaft section (12) of the glow plug (10) extends substantially radially into the combustion chamber (14).A mounting arrangement (44, 45, 46, 17, 8) for the glow plug (10) is configured to allow the shaft portion (12) of the glow plug (10) to pivot within the combustion chamber (14) in a direction (R) along the center axis (M) away from the evaporator (20). A corresponding insert component with an integrally formed retaining ring for the evaporator is also provided.

The utility model relates to an integrated structure of a glow plug and an oil injector sleeve of an internal combustion engine. The fuel injector sleeve comprises a containing cavity used for arranging a fuel injector and an end wall located on one side of the containing cavity, a center hole is formed in the end wall in a penetrating mode, and at least one through hole is distributed in the end wall along the periphery of the center hole. The mounting sleeve is mounted in the accommodating cavity, and the mounting sleeve comprises an accommodating hole corresponding to the through hole; and the heating body comprises a mounting end and a heating end, the mounting end extends into and is connected with the accommodating hole, and the heating end extends out of the through hole. Due to the integrated design of the glow plug and the fuel injector sleeve, the overall size is effectively reduced, the occupied space is smaller, and the compact layout of the internal combustion engine is facilitated.

The invention discloses a zero-low-carbon fuel combustion device based on catalytic heat surface combustion supporting and a control method thereof, and relates to the technical field of aviation power equipment.The zero-low-carbon fuel combustion device based on catalytic heat surface combustion supporting comprises a glow plug suitable for being installed on the wall face of a combustion chamber of an engine and stretching into the combustion chamber of the engine; the protective cover is arranged on the radial outer side of the glow plug, a cavity is formed between the inner circumferential surface of the protective cover and the outer circumferential surface of the glow plug, catalyst layers are arranged on the inner circumferential surface of the protective cover and the outer circumferential surface of the glow plug, a first opening communicated with the cavity is formed in the protective cover, and the first opening comprises a plurality of sub through holes formed at intervals; a second opening is formed between the protective cover and the glow plug; and the injector is suitable for injecting fuel into the first opening. The zero-low-carbon fuel combustion device based on catalytic heat surface combustion supporting has the advantages of being capable of achieving the zero-low-carbon target conveniently, good in ignition performance, high in flame propagation performance, long in service life and the like.

The present invention discloses a combustion system applicable to a large-bore ammonia-diesel engine, which includes an engine, a pre-chamber subsystem, a fuel supply subsystem, and an electronic control subsystem; the interior of the pre-chamber main body of the pre-chamber subsystem is of a plow-shaped structure, and a high-pressure double direct injection injector is installed on its upper left side; the fuel supply subsystem includes an ammonia tank, a diesel fuel tank, and an intake port ammonia injector. Two ammonia supply pipelines of the ammonia tank, one is connected to the liquid ammonia channel of the high-pressure double direct injection injector; the other is connected to the intake port ammonia injector; the diesel fuel pipeline is connected to the diesel fuel channel of the high-pressure double direct injection injector; the electronic control subsystem includes a temperature sensor, a glow plug, a high-pressure double direct injection injector, and an intake port ammonia injector, all of which are connected to the ECU unit. The ECU unit adjusts the injection strategy of the intake port ammonia injector according to the engine throttle opening; controls the liquid ammonia and diesel injection strategies of the high-pressure double direct injection injector and the heating switch of the glow plug according to the pre-chamber temperature to regulate the temperature and combustion mode of the pre-chamber.

The application discloses a compression ignition type methanol engine and a control system thereof, and relates to the technical field of engine control, which comprises a methanol engine and a methanol tank, further comprises a methanol water boiler, and is provided with an electric heating plug at a cylinder of the methanol engine; the methanol tank is connected with the methanol water boiler, a first methanol pump and a second methanol pump through connecting pipelines respectively; control valves one, two and three are arranged on the connecting pipelines respectively; the control system of the compression ignition type methanol engine comprises a cold start and warm-up working condition identification module, an acceleration working condition identification module, a load working condition identification module and an engine control module; the high-efficiency and reasonable heat management system and the air intake passage / in-cylinder double-methanol injection supply technology are adopted, the methanol engine can be operated efficiently in all working conditions, the efficiency and the power of the methanol engine can be improved simultaneously, and the effect of the high-efficiency and high-power compression ignition type methanol engine is realized.

A system for reducing internal combustion engine emissions includes an engine, a catalytic converter fluidly connected to a combustion chamber via an exhaust line, a glow plug positioned along the exhaust line between the catalytic converter and the combustion chamber, and a flame accelerator, without a fluid connection to a separate fuel supply. Methods of using the system include igniting a mixture of air and fuel in the exhaust line using the glow plug, producing an amount of heated combustion gas.

A method is proposed for operating an exhaust gas heater (1) having a combustion chamber (2) into which an air stream is introduced by an air pump (6) and fuel by a fuel injector (16), and the air-fuel mixture is ignited by a glow plug (4). The hot exhaust gases thus formed are passed through the exhaust system (8) of an internal combustion engine (2). A quantity of condensate in the exhaust gas heater (1) is determined, and the output of the glow plug (4) is adjusted to the determined quantity of condensate. Furthermore, an exhaust gas heater is proposed with means for determining the quantity of condensate in the region of the glow plug (4).

This invention provides a glow plug ignition internal combustion continuous supercritical water oxidation device, comprising three parts: an ignition zone, a reaction zone, and a separation zone. The device utilizes the heat from the glow plug to ignite fuel in the inclined reaction tube, rapidly raising the temperature in the reaction zone to the required level, achieving rapid preheating and efficient degradation of organic wastewater. Furthermore, the fuel does not require a preheater during the entire heating process, reducing equipment investment and energy consumption. The lower end of the separation straight tube is equipped with a first electric ball valve, a salt discharge pipe, and a second electric ball valve. By adjusting the opening and closing of the first and second electric ball valves, automatic salt discharge can be achieved, preventing the generation of saline wastewater and facilitating continuous reactor operation and zero discharge, thus meeting the needs of industrial-scale treatment.

A silicon nitride glow plug belongs to the technical field of glow plugs. Comprising a heater assembly, a threaded sleeve, a connecting wire, an insulating sleeve, a bolt block, a mounting piece and a connecting piece, the upper end of the heater assembly is sleeved with a threaded sleeve and a bolt block. A connecting column is arranged in the bolt block, and a heating wire is arranged on the connecting column in a sleeving manner; the connecting wire is connected to the heating wire, the lower end of the connecting wire is sleeved with an insulating sleeve, and the upper end of the connecting wire is connected with a connecting piece; and the mounting piece penetrates through the connecting line. According to the utility model, the heater assembly, the connecting wire, the insulating sleeve, the mounting piece and the connecting piece are arranged; due to the arrangement of the external wiring terminal, the connection firmness and the contact performance are improved, so that the electric energy can be transmitted smoothly, and the heating effect is better; the insulating sleeve is arranged to protect the internal external wiring terminal, so that the fault rate and the damage rate of the glow plug are reduced; the installation piece and the connecting piece are arranged, so that the glow plug is convenient to connect and use, and the glow plug is long in service life, fast in temperature rise and convenient to install.

The present invention discloses a spiral coil heating flame preheating plug and a diesel engine, belonging to the technical field of engine cold start auxiliary system. The spiral coil heating flame preheating plug comprises a flame cover, a shell, an electromagnetic induction evaporation net, an oil inlet pipe and an electromagnetic induction spiral coil, wherein the wall of the flame cover is provided with ventilation holes, and is coaxially arranged in the inner cavity of the lower part of the shell; the electromagnetic induction evaporation net is sandwiched between the inner wall of the shell and the outer wall of the flame cover; one end of the oil inlet pipe is connected to the electromagnetic induction evaporation net, and the other end can be connected to the oil pump; the electromagnetic induction wire spiral coil is spirally wound on the outer wall of the shell and the position corresponding to the electromagnetic induction evaporation net; the inner cavity of the upper part of the shell forms a mixed gas cavity. The spiral coil heating flame preheating plug can significantly improve the cold start performance of the diesel engine in extremely cold and harsh environments.

A sparked reciprocating four-stroke internal combustion hydrogen-fueled engine having a casing, a rotatable crankshaft, a cylinder inside the casing, a piston inside the cylinder to movably reciprocate along an axis between top and bottom dead center positions (TDC, BDC) and operatively connected to the crankshaft such that the piston imparts a rotational movement to the crankshaft, a combustion chamber within the cylinder between the engine casing and piston head opposite the crankshaft, intake and exhaust valves, hydrogen and water injectors; a spark or glow plug, and an engine control unit to control timing and quantity of hydrogen and water injections by injecting into the combustion chamber first, second, and third quantities of hydrogen at first, second, and third timings, respectively, from 20° before TDC during compression stroke to 20° after TDC, from 110° to 90° before TDC during compression stroke and from 180° to 100° before TDC during compression stroke.

A sparked reciprocating four-stroke internal combustion hydrogen-fueled engine having a casing, a rotatable crankshaft, a cylinder inside the casing, a piston inside the cylinder to movably reciprocate along an axis between top and bottom dead center positions (TDC, BDC) and operatively connected to the crankshaft such that the piston imparts a rotational movement to the crankshaft, a combustion chamber within the cylinder between the engine casing and piston head opposite the crankshaft, intake and exhaust valves, hydrogen and water injectors; a spark or glow plug, and an engine control unit to control timing and quantity of hydrogen and water injections by injecting into the combustion chamber first, second, and third quantities of hydrogen at first, second, and third timings, respectively, from 20° before TDC during compression stroke to 20° after TDC, from 110° to 90° before TDC during compression stroke and from 180° to 100° before TDC during compression stroke.

The present invention refers to a heating plug, more particularly, a heating plug containing an exposed filament, which is used in fuel galleries, principally those applied in internal combustion engines requiring fuel heating. The heating plug with exposed filament provided with an insert, said heating plug including a shell (10), which encloses, inside, at least one electrical terminal (20); at least one filament support (60); and at least one filament (70) in electrical contact with said at least one electrical terminal (20) by means of at least one pin (50). The present invention provides a sufficiently robust, efficient and reliable solution which does not demand altering all the constructive arrangement of the heating plug, which is capable of assuring adequate sealing between the fuel gallery and the heating plug and which, moreover, guarantees the correct power supply to the exposed filament.

A burner for an exhaust-gas aftertreatment system. The burner includes a housing forming a combustion chamber, the housing having an outlet connected or connectable to an exhaust-gas line of the exhaust-gas aftertreatment system; a fuel feed device for feeding fuel into the combustion chamber; a fresh air feed device for feeding fresh air into the combustion chamber; and an ignition unit for igniting a fresh air-fuel mixture arranged in the combustion chamber. The ignition unit has a glow plug, which is arranged in the combustion chamber in such a way that a longitudinal center axis of the glow plug is oriented obliquely to a cross-sectional plane of the combustion chamber.

The utility model provides a glow plug with a protection mechanism, which relates to the technical field of automobile glow plug protection and comprises a glow plug body, an air port end is arranged at the top end of the glow plug body, and a threaded connection end is arranged on the outer surface of the bottom end of the glow plug body. The protection mechanism can be connected with an automobile internal component and an automobile external component through the connecting cabin arranged in the protection mechanism, the retention threaded end formed in the connecting cabin and the external threaded end formed in the cover body, and in the process, a limiting block connected with the connecting cabin and a limiting groove formed in the limiting block can be subjected to positioning type anti-displacement installation; in the state that installation is completed, a limiting block and a spring piece which are connected with the connecting cabin body and an empty groove formed in the cover body buffer the bottom end and the top end of the glow plug body, and therefore the situation that the glow plug body deforms is prevented, and when the cover body and the connecting cabin body connecting assembly are damaged, the cover body and the connecting cabin body connecting assembly are not damaged. And rapid and convenient replacement can be carried out, and the problem of inapplicability of integrated protection is solved.

A combustion chamber of a gas turbine engine comprises a divergent duct, a hot chamber with a system of ports, support brackets, a streamlined inner and outer housing, injection nozzles, glow plugs, and a convergent duct at the exit from the chamber, wherein part of the airflow flows over the outside of the hot chamber and part of the airflow is fed via ports in the front wall of the chamber into an inner cavity and is mixed with fuel fed in via ports in the front wall of the hot chamber, the fuel spray cone angle is 30-90°, the total area of the ports in the front wall is selected so as to maintain a reducing medium in the hot chamber, the equivalence ratio is 3-6, and the area of ports provided in the lateral walls is selected so that as gas moves through the hot chamber, an influx of air ensures complete burn-up of the fuel prior to the exit into the convergent duct proportionally to the axial length of the hot chamber. Upon exit from the hot chamber, the medium must have a 25-50% excess of oxidizer. Upon exit of the combustion products into the convergent duct, the excess of oxidizer is 2-5%. The invention makes it possible to increase combustion efficiency, reduce the dimensions of the combustion chamber, and isolate the wall of the chamber from the combustion zone, thus extending the lifespan of the combustion chamber.

The utility model belongs to the technical field of test tools, and particularly relates to a glow plug durability test device and a test board, and the glow plug durability test device comprises a power supply assembly, a power-on and power-off control assembly and a plurality of parameter test assemblies. Wherein the power-on and power-off control assembly is electrically connected with the power supply assembly, and each parameter test assembly is electrically connected with the power-on and power-off control assembly; each parameter testing assembly is suitable for being connected with a corresponding glow plug; the power-on and power-off control assembly is suitable for controlling the power supply assembly to be connected or disconnected with the parameter testing assemblies so that the parameter testing assemblies can collect parameter data of the corresponding glow plugs. According to the utility model, the power supply assembly, the power-on and power-off control assembly and the parameter testing assemblies are matched, and the glow plugs are directly connected to the parameter testing assemblies, so that parameter data of the glow plugs can be automatically tested, the durability of the glow plugs can be automatically tested, the detection efficiency is improved, and the cost is saved.

The invention provides a minimum intake preheating power design method for an on-way heat dissipation flame glow plug diesel engine, which comprises the following steps of: firstly, constructing a diesel engine intake energy conservation equation set considering on-way heat dissipation of an intake pipeline; then, a triple data set composed of the atmospheric environment temperature, the air inlet pressure value and the corresponding minimum air inlet preheating power is obtained according to the diesel engine air inlet energy conservation equation set, and finally, a first Map graph of the minimum air inlet preheating power changing along with the diesel engine rotating speed and the atmospheric environment temperature is obtained according to the triple data set; according to the second Map, the minimum air inlet preheating power changes along with the rotating speed of the diesel engine and the altitude; therefore, the on-way heat dissipation loss of the intake manifold and the intake duct is considered, so that the intake preheating power of the diesel engine can be autonomously regulated and controlled along with the change of the environment temperature, and the cold starting performance of the diesel engine can be improved.

The invention relates to the field of engines, and discloses a compression ignition type alcohol ammonia engine which comprises a temperature-controllable glow plug, a first ejector and a second ejector, and the first ejector can eject methanol into a combustion chamber; the second injector can inject ammonia fuel into the combustion chamber; methanol sprayed into the combustion chamber combusts under the action of the temperature-controllable glow plug to ignite ammonia sprayed into the combustion chamber so as to push the piston to move, the piston drives the crankshaft to rotate through the connecting rod, and the crankshaft drives the output element to move so as to achieve power output. Methanol is used as an ignition fuel, then methanol combustion heat is used for igniting an ammonia fuel, the ammonia fuel is used as a main fuel, compression ignition of the ammonia fuel is achieved, only nitrogen and water are generated during combustion of the ammonia fuel, and the carbon emission of methanol combustion is far lower than that of high-carbon fuel diesel combustion. Methanol is adopted as ignition fuel, ignition reliability is high, and the problem of ammonia escape is avoided. The invention further provides an operation method of the compression ignition type alcohol ammonia engine.

System (100) for heating a catalyst (20) of a vehicle, comprising a chamber (110) that can receive an airflow via a chamber inlet port (112), a glow plug (120) housed in the chamber (110) and configured to heat the airflow received in the chamber (110), and an electric compressor (130) located downstream of the chamber (110) and having a compressor inlet port (132) fluidly coupled to a chamber outlet port (114) for receiving the airflow from the chamber (110). The electric compressor (130) is configured to compress the airflow received from the chamber (110) to increase the temperature of the airflow and to supply a compressed airflow to the catalyst (20) via an outlet port (134) of the compressor in order to achieve a cut-off temperature of the catalyst (20).The preheating of the catalyst (20) takes place before the engine (10) is started, thereby reducing emissions under cold conditions.

The present invention discloses a disc-type coil heating type flame preheating plug and a diesel engine, belonging to the technical field of engine cold start auxiliary system. The disc-type coil heating type flame preheating plug comprises a flame cover, a disc-shaped electromagnetic induction coil, a disc-shaped electromagnetic induction heating element, an evaporation net and an oil pipe, wherein the wall of the flame cover is provided with ventilation holes, and the bottom of the flame cover is coaxially provided with a disc-shaped electromagnetic induction coil; the disc-shaped electromagnetic induction heating element is coaxially provided on the top surface of the disc-shaped electromagnetic induction coil; the evaporation net is coaxially provided on the top surface of the disc-shaped electromagnetic induction heating element; one end of the oil pipe passes through the flame cover and is inserted into the evaporation net, and the other end can be connected to the oil pump; the inner cavity of the flame cover forms a mixed gas cavity. The disc-type coil heating type flame preheating plug can significantly improve the cold start performance of the diesel engine in extremely cold and harsh environments.

The utility model discloses a vehicle metal glow plug convenient to disassemble and assemble, which relates to the related technical field of glow plugs, and comprises a glow plug main body, and a heat conductor is arranged in the glow plug main body; the clamping assembly is arranged in the glow plug main body and is used for multi-point positioning of the heat conductor; and an annular groove is formed in the outer wall of the glow plug body, and the rotating assembly is arranged in the annular groove and used for limiting displacement of the clamping assembly. The arrangement mode that the clamping assembly and the rotating assembly are matched is utilized, the clamping assembly can be controlled to clamp, fix or disassemble and replace the heat conductor through rotation of the rotating ring in the rotating assembly, the damaged heat conductor can be conveniently replaced without using any tool, the maintenance time is greatly saved, and the working efficiency is improved. The usability of the equipment is improved, and other parts can be normally used, so that the durable effect is achieved, and the use is convenient.

A method and a device for diagnosing a heater (1) of an exhaust system (8) of an internal combustion engine (2) are proposed, wherein air is supplied to a combustion chamber (3) of the heater by a secondary air pump (6) and fuel is supplied by an injection valve (16). An air-fuel mixture thus formed in the combustion chamber (3) is ignited by a glow plug (4). The fuel is injected by controlling the injection valve (16) for individual partial injections at predetermined times. The combustion of the individual partial injections triggers a sensor signal in a pressure sensor (21) in the air supply to the combustion chamber (3) or a connecting pipe (9) from the combustion chamber to the exhaust system (8).By evaluating the pressure signal of the pressure sensor (21) with a frequency characteristic of the times of the partial injection and by evaluating the signal of a further sensor (10, 22), a continuous injection of fuel through the injection valve (16) is determined.