68 results about "Catalytic converter" patented technology

Deterioration diagnostic device for an exhaust gas control catalyst, wherein the deterioration diagnostic device is configured to diagnose deterioration of the exhaust gas control catalyst which is provided in an exhaust port of an internal combustion engine and is configured to store oxygen, and wherein the deterioration diagnostic device comprises: a downstream air-fuel ratio sensor (43) configured to detect an air-fuel ratio of an exhaust gas that has flowed out of the exhaust control catalyst; and a control device (31) configured to control an air-fuel ratio of an exhaust gas flowing into the exhaust control catalyst and to diagnose deterioration of the exhaust control catalyst based on an output from the downstream air-fuel ratio sensor (43), wherein the control device (31) is configured in a deterioration diagnostic process to diagnose deterioration of the exhaust control catalyst to alternately and repeatedly perform a rich process and a lean process, wherein the rich process is a process in which the air-fuel ratio of the exhaust gas flowing into the exhaust control catalyst is controlled to a rich air-fuel ratio that is richer than a stoichiometric air-fuel ratio, and wherein the lean process is a process in which the air-fuel ratio of the exhaust gas flowing into the exhaust control catalyst is controlled to a lean air-fuel ratio that is leaner than the stoichiometric air-fuel ratio. to switch from the rich process to the lean process when the amount of oxygen released by the exhaust gas control catalyst since the start of the rich process equals the first amount of oxygen, and to switch from the lean process to the rich process when the amount of oxygen stored in the exhaust gas control catalyst since the start of the lean process equals the second amount of oxygen, which is lower than the first amount of oxygen, and to determine that the exhaust gas control catalyst has deteriorated when the lean process is carried out and a frequency at which an output air-fuel ratio of the downstream air-fuel ratio sensor (43) is equal to the lean air-fuel ratio is equal to or greater than a predetermined frequency.

This invention relates to the field of engine exhaust gas recirculation (EGR) technology, and discloses a heating and vaporization device and method for engine EGR condensate. The device includes a compressor with an inlet and an outlet on its outer side. An intercooler is fixedly connected to the outlet end away from the compressor. A pipe assembly is located in the middle of the intercooler, and an engine cylinder, a turbine, and a three-way catalytic converter are connected in series via the pipe assembly. An exhaust port is located on the outer side of the three-way catalytic converter. This invention heats the liquid water that precipitates and flows into the intercooler, causing it to undergo a complete phase change and convert into water vapor. The water vapor then enters the engine cylinder along with the gas mixture, blocking the path of liquid water intruding into the engine cylinder, avoiding the risk of misfire caused by liquid water, and improving the mechanical stability of engine operation.

This invention provides a catalytic converter that can stably improve the purification rate of a three-way catalytic converter. [Solution] The catalytic converter 2 comprises a three-way catalytic converter 5 for purifying engine exhaust gas, a baffle plate 6 having a plurality of holes through which exhaust gas passes, and a case 3 that houses the three-way catalytic converter 5 and the baffle plate 6. The case 3 has an inlet 31 for introducing exhaust gas discharged from the engine, an expanding 32 for expanding the flow path cross-sectional area of ​​the exhaust gas that has entered from the inlet 31, a housing 33 for housing the three-way catalytic converter 5, a contracting 34 for reducing the flow path cross-sectional area of ​​the exhaust gas that has passed through the three-way catalytic converter 5, and an outlet 35 for releasing the exhaust gas that has passed through the contracting 34. The outlet 35 has a mounting portion 351 to which an oxygen sensor 4 for detecting the oxygen concentration contained in the exhaust gas flowing through the outlet 35 is attached. The baffle plate 6 is provided inside the case 3 between the three-way catalytic converter 5 and the mounting portion 351.

A method comprising: generating NO2 in a catalyst (70) comprising a washcoat with zirconium, one or more base metal oxides and a palladium oxide, wherein an exhaust gas flow rate is between the lower and upper threshold flow rates; and facilitating regeneration of a particulate filter (72) located downstream of the catalyst (70) via NO2 when an exhaust gas temperature is greater than a threshold temperature; wherein the palladium oxide is contained in an upstream section (70A) of the catalyst (70) in relation to a direction of the exhaust gas flow; and the at least one base metal oxide is contained in a downstream section (70B) of the catalyst (70) in relation to the direction of the exhaust gas flow.

When a manifold catalytic converter, which is a catalyst above an exhaust passage, is warmed, a control unit is configured to control the energization of an electric heater of the manifold catalytic converter, and / or the driving of an internal combustion engine in accordance with a battery SOC of a battery. This makes it possible in a hybrid vehicle to warm the manifold catalytic converter using an amount of electric power consumed by motoring of an electric motor, and generally to shorten a time taken to drive the internal combustion engine for catalyst warming.

The utility model discloses a kind of C-14 samplers, it relates to radioactive material sampling equipment technical field, it includes sampling box and air inlet sampling head, catalytic converter and several sampling bottles are equipped in sampling box, sampling bottle is used to hold gas collection liquid in, bubbler is installed in sampling bottle;Sampling bottle includes side by side arranged first sampling bottle, second sampling bottle, third sampling bottle and fourth sampling bottle;The air inlet end of first sampling bottle is communicated air inlet sampling head, the air outlet end of first sampling bottle is communicated the air inlet end of second sampling bottle;The air outlet end of second sampling bottle is communicated the air inlet end of catalytic converter, the air outlet end of catalytic converter is communicated the air inlet end of third sampling bottle, the air outlet end of third sampling bottle is communicated the air inlet end of fourth sampling bottle, the air outlet end of fourth sampling bottle is communicated with power air pump. By this, the utility model is catalyzed by catalytic converter to gas catalytic conversion, improve the absorption effect of C-14, reduce error, improve the accuracy of detection result.

[Problem] To provide a catalytic converter that can stably improve the purification rate of a three-way catalyst. [Solution] Provided is a catalytic converter 2 comprising: a three-way catalyst 5 that purifies exhaust gas from an engine; a baffle plate 6 that has a plurality of holes through which the exhaust gas passes; and a case 3 that accommodates the three-way catalyst 5 and the baffle plate 6. The case 3 includes: an inflow section 31 into which flows the exhaust gas discharged from the engine; an expansion section 32 where the cross-sectional area of the flow passage for the exhaust gas flowing in from the inflow section 31 is expanded; an accommodation section 33 that accommodates the three-way catalyst 5; a reduction section 34 where the cross-sectional area of the flow passage for the exhaust gas that has passed through the three-way catalyst 5 is reduced; and an outflow section 35 out from which flows the exhaust gas that has passed through the reduction section 34. The outflow section 35 has an attachment part 351 to which is attached an oxygen sensor 4 for detecting the concentration of oxygen contained in the exhaust gas that flows through the outflow section 35. The baffle plate 6 is provided in the interior of the case 3 and between the three-way catalyst 5 and the attachment part 351.

The present invention aims to provide an exhaust gas purification device for an engine that suppresses the deterioration of exhaust emissions. The engine exhaust gas purification device includes: a first catalytic converter comprising a first housing and a first catalyst carrier held within the first housing; a second catalytic converter located downstream of the first catalytic converter and comprising a second housing and a second catalyst carrier held within the second housing; a connecting pipe connected between the first housing and the second housing, with its central axis bent; the first catalyst carrier having a downstream end face; the first housing having a downstream end protruding downstream from the downstream end face; the second catalyst carrier having an upstream end face; and a gap being formed between the downstream end face and the upstream end face in a direction perpendicular to the downstream end face.

The utility model discloses a thrust ring for catalytic converter carrier, it includes shell, catalytic converter body and metal baffle, the catalytic converter body is located in the shell, the metal baffle sets up in one end of catalytic converter body, the metal baffle is arc, the lateral wall of metal baffle has the gap, the outer periphery side of metal baffle and the inner periphery side of shell are pasted. The present application has the effect of improving the stability of catalytic converter body.

The application discloses a heating control system and method of a catalytic converter; the intake air flow into the engine is calculated according to the intake manifold pressure; the heating time length of the catalytic converter is determined according to the intake air flow into the engine, and the catalytic converter is heated according to the heating time length. The application judges the condition of entering the catalytic converter heating during cold start, calculates the engine intake air quantity during each catalytic converter heating stage, calculates the heating time of the catalytic converter after each engine start according to the engine intake air quantity and the catalytic converter deterioration coefficient, makes the catalytic converter quickly reach the effective conversion temperature, effectively reduces the emission and fuel consumption of the catalytic converter during the heating stage in the whole vehicle service period, and guarantees the time control of the catalytic converter heating after each engine start. The application considers the aging of the catalytic converter in the whole vehicle service period, makes the catalytic converter quickly reach the effective conversion temperature, and effectively reduces the emission and fuel consumption of the catalytic converter during the heating stage in the whole vehicle service period.

A hybrid vehicle OBD system diagnosis optimization method and device, the method comprising: if the OBD system diagnosis is incomplete when the vehicle is in long-term EV mode, controlling the vehicle to enter HEV mode; under the premise that the vehicle travels at a preset vehicle speed and the engine operates at a preset first speed, if the cumulative operating time of the engine and the cumulative travel time of the vehicle in the preset vehicle speed range both reach a preset first time threshold, and the engine coolant temperature and the catalyst converter carrier temperature both reach the corresponding temperature threshold, performing OBD system diagnosis on each diagnosis item; the diagnosis items include a particulate trap and a catalyst converter. The method actively constructs a diagnosis working condition, so that the engine performs OBD system diagnosis after meeting the aforementioned working condition, thereby meeting the compliance sampling requirements, and completing part of the emission diagnosis items that cannot be performed under the actively constructed engine operating condition, improving the completeness and reliability of the OBD system diagnosis results.

A natural gas combustion system and its burner assembly for simulating the working environment of a three-way catalytic converter include an intake assembly, a combustion assembly, a cooling assembly, and a reaction assembly. The intake assembly includes a gas bus and an air bus. The combustion assembly includes a primary combustion mechanism and several secondary combustion mechanisms. It also includes a combustion process, comprising a primary combustion stage and a secondary combustion stage. Furthermore, it includes a regulating component. When the regulating component is located on the gas branch line, it sequentially includes a pneumatic valve, a filter, a flow meter, a check valve, and a flame arrester. When the regulating component is located on the air branch line, it sequentially includes a filter, a flow meter, and a check valve. This invention employs a multi-stage burner to perform multi-stage combustion of natural gas to simulate the reaction environment during normal operation of a three-way catalytic converter. It also features a complete automated closed-loop system for dynamic adjustment, significantly improving experimental accuracy through the air-fuel ratio meter and air-fuel ratio control unit of each burner stage.

A boil-off management system for a cryotank includes a boil-off conduit which is fluidically connectable to a cryotank via a boil-off valve. The boil-off management system further includes an air feed conduit and a mixing chamber for mixing a first medium (e.g., hydrogen) flowing in through the boil-off conduit with a second medium (e.g., air and / or oxygen) flowing in through the air feed conduit. A catalytic converter is arranged downstream of the mixing chamber and an outlet downstream of the catalytic converter. At least one enrichment apparatus is provided and configured to temporarily increase the proportion of the first medium flowing in through the boil-off conduit in relation to the second medium flowing in through the air feed conduit at the catalytic converter.

In various embodiments, methods and systems are provided that include one or more vehicle sensors and a vehicle processor. The one or more sensors are configured to obtain sensor data on the operation of one or more of the vehicle's catalytic converters. The processor is coupled to the one or more sensors and configured to perform at least the following: determining, using the sensor data in combination with a physics-based model, the oxygen saturation value of a catalyst in the one or more catalytic converters; determining whether the catalyst's oxygen saturation value exceeds a predetermined threshold; and implementing one or more oxygen purge strategies, via instructions provided by the processor, when the catalyst's oxygen saturation value exceeds the predetermined threshold.

The present invention relates to a system designed to enhance the thermomechanical efficiency of internal combustion engines while reducing emissions, noise, and maintenance requirements. The system comprising a booster, soft ferrite coils, a magnetic pick-up, and a feedback mechanism increases energy density within the engine. This enables operation on lean fuel mixtures, continuous removal of carbon deposits, improved combustion, and minimized pressure drops, thereby enhancing efficiency and reducing wear. The system reduces noise, vibrations, and particulate emissions under constant or variable engine conditions. By optimizing fuel consumption and reducing back pressure, it promotes cleaner, quieter, and sustainable engine operation while improving catalytic converter lifespan and achieving overall performance gains.

This invention provides a method and apparatus for controlling the amount of explosives used in tunnel lining based on vibration velocity prediction using a four-line, small-clearance system. It relates to the field of tunnel blasting technology and includes: acquiring multiple tunnel models and vibration velocity data; drawing tangents to the outer edge of the second main tunnel structure based on the blast center point of the first main tunnel and the stress nodes of the third auxiliary tunnel, respectively, to obtain a second blast-facing tangent point and a second edge tangent point; calculating the effective propagation distance from the blast center point to each node for different scenarios involving the distance from the blast center point to the second blast-facing tangent point and the second edge tangent point, based on the straight line of the blast source; fitting attenuation coefficients and void coefficients using vibration velocity data and predicting their construction to obtain a vibration velocity prediction model; and back-calculating the safe explosive charge based on the vibration velocity prediction model and a safe vibration velocity threshold to obtain the controlled explosive charge. This invention solves the problems of safety and efficiency in tunnel construction.

The present patent application discloses a device for continuous air circulation in an impingement electric oven, which generally belongs to the field of ovens for cooking food and more specifically to electric ovens for cooking pizzas, which is provided with a catalytic converter filter that eliminates the need for an extraction hood; the device comprises an appliance integrated into an impingement electric oven (1A) provided with a catalytic air filter (35) that eliminates the need for an extraction hood and more specifically comprises a rigid metal structure incorporating a cooking chamber (5) and a chamber for distributing hot air into said cooking chamber (5), a centrifugal fan and a catalytic air filter (35).

The exhaust system includes: an exhaust manifold having multiple branch pipes and a collector; and a catalytic converter housing connected to the downstream side of the collector in the exhaust manifold. The multiple branch pipes of the exhaust manifold are configured such that the direction of the exhaust flowing into the collector forms an acute angle with respect to the axial direction of the catalytic converter housing. Furthermore, the collector is configured such that its internal space is spherical.

The application relates to the technical field of pipeline connection, and particularly discloses a connecting assembly, a tail gas treatment device and a vehicle. The connecting assembly comprises a first connecting element for connecting a catalytic converter and a second connecting element for connecting a pipeline. One of the first connecting element and the second connecting element is provided with a slot, and the other comprises a plug-in piece which is plugged into the slot to communicate the catalytic converter and the pipeline in a first direction and limit the relative movement of the first connecting element and the second connecting element in the first direction. The first connecting element and the second connecting element are connected through the plug-in mode to realize the assembly of the connecting assembly, the connecting assembly is efficient in disassembly, and therefore the disassembly efficiency between the catalytic converter and the pipeline is improved.

Embodiments of this disclosure relate to the catalytic conversion of a gas medium in an optical amplifier. An extreme ultraviolet (EUV) light system includes an optical amplifier system and an optical conversion system. Each optical amplifier in the optical amplifier system includes a gain medium in the form of a gas mixture that generates an amplified light beam. The optical amplifier system includes a fluid inlet and a fluid outlet through which the gas mixture can flow. The catalytic conversion system is fluidly connected to the fluid outlet of the optical amplifier system and to the fluid inlet of the optical amplifier system. The catalytic conversion system includes a catalytic converter comprising: a housing; a substrate having openings within the housing through which the gas mixture can flow; and a catalyst, applied as a coating to the inner surface of the openings of the substrate, the catalyst comprising particles of a metal. The metal particles may be nanoparticles of a noble metal.

The application discloses a VOCs catalytic conversion furnace system and a running method and a running control method thereof, wherein the VOCs catalytic conversion furnace system comprises a VOCs catalytic conversion device, a first explosion detector, a second explosion detector, an oxidant pipeline, a VOCs pipeline, a dilution gas pipeline, a first tail gas pipeline and a second tail gas pipeline; the VOCs catalytic conversion device comprises at least three reaction bed shells, and a VOCs catalytic conversion bed is arranged in each reaction bed shell; the VOCs catalytic conversion furnace system can realize efficient and safe conversion of VOCs; the system can monitor the VOCs concentration in the conversion furnace in real time, and prevent explosion caused by excessive hot air pressure in the furnace through the control method, so that the safe operation of the VOCs catalytic conversion furnace is ensured.

This invention provides an engine exhaust aftertreatment assembly, an engine exhaust treatment method, and a vehicle. The engine exhaust aftertreatment assembly includes: an engine; an exhaust pipe, the inlet end of which is connected to the engine, and the outlet end of which is connected to one end of a connecting pipe, the outlet end of which is equipped with a temperature sensor, and the other end of the connecting pipe being connected to a three-way catalytic converter; the connecting pipe is equipped with a first three-way valve and a second three-way valve, the inlet end of which is connected to the outlet end of the exhaust pipe, the outlet end of which is connected to the inlet end of the second three-way valve, and the outlet end of the second three-way valve being connected to the three-way catalytic converter; and a branch pipe, which is connected in parallel with the connecting pipe and is equipped with a hydrocarbon collector. This application solves the problem of low catalytic efficiency of three-way catalytic converters in the prior art.

This utility model provides a device for spot welding a catalyst support and a nut, which can effectively control the inward shrinkage of the catalyst support and avoid deformation of the catalyst support due to uneven temperature. It includes an upper electrode and a lower electrode that cooperate with each other. The lower electrode is provided with a positioning pin, which can position the nut and the support. The upper electrode is characterized by having an inner support fixed on it, and a wear-resistant ring is fixed on the outer side of the inner support. The outer diameter of the wear-resistant ring matches the size of the catalyst support. During welding, the wear-resistant ring can support the support in the catalyst support and limit the legs of the catalyst support to prevent the legs of the catalyst support from shrinking inward.

The application relates to the technical field of vehicle component fault diagnosis, in particular to a fault diagnosis method and device for a multi-catalytic system, wherein the method comprises the following steps: acquiring rear oxygen voltage signals of at least two catalytic converters in a vehicle exhaust system; calculating relative performance factors between the at least two catalytic converters according to the rear oxygen voltage signals of the at least two catalytic converters; and identifying a fault diagnosis result of the multi-catalytic system according to the relative performance factors and a comparison threshold. Therefore, the problem that, in the related art, different catalytic converters on the same vehicle can cause manufacturing tolerances, installation positions and uneven heat load distribution, leading to inconsistent performance decay rates and further affecting the fault diagnosis precision of the catalytic converters is solved.

This invention relates to a waste heat extraction device for a three-way catalytic converter. The device includes an outer tube containing a three-way catalytic converter. A first heat exchanger surrounds the three-way catalytic converter, and a second heat exchanger is located on the side of the three-way catalytic converter. Both the first and second heat exchangers are cylindrical heat exchangers, each including a heat conversion unit and a heat storage layer. The heat storage layer is cylindrical and contains a liquid channel with a liquid inlet at one end and a liquid outlet at the other. A liquid inlet pipe is located on one side of the outer tube, and a steam outlet pipe is located on the other side. The liquid inlet pipe is connected to the liquid inlet of the first heat exchanger, and the liquid outlet of the first heat exchanger is connected to the liquid inlet of the second heat exchanger via a first connecting pipe. The liquid outlet of the second heat exchanger is connected to the steam outlet pipe. This invention has the advantages of efficient space utilization, compact structure, and high heat conversion efficiency.

The application relates to a tritium sampler, which relates to the technical field of tritium sampling equipment and comprises a box body, a sampling head is installed on the box body, a catalytic device and a condensing device are installed in the box body; the catalytic device comprises a catalytic converter, catalytic inlet pipes and catalytic outlet pipes are arranged at two ends of the catalytic converter, an air inlet cooling assembly is installed on the catalytic inlet pipe; an air outlet cooling assembly is installed on the catalytic outlet pipe, the air outlet cooling assembly is communicated with the condensing device through a condensing inlet pipe, a condensing outlet pipe is provided with a fan; the condensing device comprises a cold trap, a water receiving tray is installed below the cold trap, and the water receiving tray is communicated with the outside. The application can prolong the service life of the air inlet pipe and the air outlet pipe, reduce the aging speed, prevent water accumulation in the box body, and improve the use stability of various components.

A catalytic device for removing nitrogen oxides and ammonia from the exhaust gas of a lean-burn combustion engine is disclosed, the catalytic device comprising an upstream SCR catalyst comprising a support substrate and a first washcoat comprising a first SCR catalytically active composition SCR first and optionally at least one first binder, the first washcoat being applied to the support substrate; a downstream ASC catalyst comprising a support substrate and an underlayer comprising an oxidation catalyst and optionally a third washcoat comprising at least one third binder, the underlayer being applied directly onto the support substrate; and a second SCR catalytically active composition SCR second and optionally at least one third binder. and a downstream ASC catalyst comprising an upper layer including a second washcoat, optionally including at least one second binder, the upper layer being applied on the lower layer, the upstream SCR catalyst and the downstream ASC catalyst being on a single support substrate or on two different support substrates, the first and second SCR catalytically active compositions being the same or different from each other, the optional at least one first, second and third binders being the same or different from each other, and the ratio of loadings of the first and second SCR catalytically active compositions in the first and second washcoats given in g / L (AA) being 1.2:1 to 2:1. The first and second SCR catalytically active compositions preferably include molecular sieves, and the oxidation catalyst preferably includes a platinum group metal. The catalytic device can be used to remove nitrogen oxides and ammonia from the exhaust gas of a lean-burn combustion engine.

This invention relates to a carrier structure for a three-way catalytic converter, and pertains to the field of three-way catalytic converters. The carrier body includes an axial gradient structure along the axial airflow direction, characterized by a decreasing pore size gradient and an increasing pore density gradient. The carrier body also has a radial gradient structure along the radial direction away from the center, characterized by an increasing pore size gradient and a decreasing pore density gradient. This application effectively solves the problem of unreasonable flow resistance in traditional carriers.