768 results about "Catalytic converter" patented technology

The invention relates to the technical field of automobile energy supply, in particular to a solid hydrogen storage-fuel cell integrated power assembly system based on dual-mode hydrogen supply, which comprises a hydrogen supply path identification module, a hydrogen storage unit state monitoring module, a linkage path switching module, a fuel cell load matching module and a safe hydrogen discharge regulation and control module. According to the method, the hydrogen supply pressure difference value is obtained by dynamically comparing the pressure of the cavity of the hydrogen storage tank with the pressure of the hydrogen inlet of the fuel cell, the current hydrogen supply path state can be accurately recognized in the early stage, rapid judgment of the hydrogen supply mode and accurate control of path switching are achieved, whether the risk of hydrogen supply interruption exists or not can be effectively screened, and the reliability of hydrogen supply is improved. The switching reliability of a hydrogen supply channel is improved through cross comparison of key state signals of a main channel and a standby channel, and instant response and energy consumption optimization of hydrogen discharge safety regulation and control are guaranteed through a linkage feedback mechanism between the hydrogen concentration change rate in unit time and catalytic converter control power.

The invention relates to the technical field of engines, and provides a three-way catalyst fault diagnosis method and device and electronic equipment. Comprising the steps of entering a fault diagnosis mode under the condition that a fault diagnosis condition is met; the air-fuel ratio is adjusted, and signal changes of the front oxygen sensor and the rear oxygen sensor are monitored; based on the signal change, acquiring an oxygen storage amount measurement parameter; calculating a three-way catalyst performance monitoring index based on the oxygen storage amount measurement parameter; and if the three-way catalyst performance monitoring index is not lower than the preset diagnosis threshold value, it is determined that the three-way catalyst is normal. Fault diagnosis can be carried out on the three-way catalytic converter, so that whether the purification performance of the three-way catalytic converter meets the requirement or not can be judged, and emission performance control of an engine is facilitated.

The present invention describes a system comprised of sensors, microcontrollers, wireless communication modules, and methods for utilizing said sensor system to determine, in real-time, a threat and / or theft of a catalytic converter. An alarm signal is then generated by connecting with the security system of a premises, if available, and relevant parties and law enforcement are notified of the threat and / or theft event.

Systems and methods for implementing protections against catalytic converter theft. A vehicle may comprise Ultra-Wideband (UWB) anchors or sensors. The UWB sensors of a vehicle may be used to detect the relative distance and / or location of UWB-capable devices in close proximity to the vehicle. An assessment may be performed using the UWB anchors and / or other sensors to determine whether the presence of the unknown device is indicative of a threat to the vehicle. If a threat is detected, one or more protection steps may be taken.

The invention relates to the technical field of vehicles, and discloses a misfire diagnosis method, device and equipment for an engine of a range extender and a storage medium, and the method comprises the steps that under the catalytic converter heating working condition, if the numerical value of a current original misfire risk signal is located outside a preset numerical value interval, the torque of a generator of the range extender is adjusted, acquiring a fire risk signal after the torque is adjusted; and determining whether the engine is on fire or not according to the continuous condition of the fire risk signals with the numerical values larger than the preset signal threshold value in the preset period. Under the heating working condition of the catalyst, if the monitored value of the real-time original misfire risk signal is located outside the preset value interval, the torque of the generator of the range extender is adjusted to adjust the subsequent misfire risk signal, so that the characteristics of the misfire risk signal are enhanced, the influence of other interference signals is weakened in a disguised manner, and the safety of the engine is improved. According to the adjusted misfire risk signal, misfire diagnosis can be carried out more accurately, and the accuracy of misfire diagnosis is improved.

A vehicle exhaust system compresses and collects initial contaminants for a period of time after a cold start of the vehicle to wait for completion of heating of a three-way catalytic converter. Then, an exhaust pipe passage is opened. At the moment, the chemical reaction capacity of the three-way catalytic converter is remarkably improved, and therefore the problem that excessive pollutants are discharged in the heating stage of the three-way catalytic converter after cold start of the vehicle is effectively solved. In addition, the invention further provides a method for vehicle exhaust and a vehicle with the vehicle exhaust system.

Method for calculating NH3 and NOx concentrations downstream from an SCR system of an internal combustion engine (E) of a vehicle by means of a statistical module, the method comprising the following steps: using temperature measurements acquired upstream (T1) and downstream (T2) of the Selective Reduction Catalyst (SCR) as first input variables and NOx mass flow measurements acquired upstream (N1) and downstream (N2) of the SCR as second input variables; calculating an NH3 concentration downstream from the SCR catalytic converter as a function of the first and second inputs.

An electrically conductive circuit has a distal end coupled to a catalytic converter of a vehicle. A sensor such as a voltage divider is coupled to a proximal end of this conductive circuit. The voltage divider senses when a resistance associated with the conductive circuit is altered, indicative of catalytic converter tampering. An alarm signal can then be sent to the vehicle horn or otherwise beneficially outputted to warn of the tampering. The conductive circuit preferably includes a length of nichrome wire having a substantial resistance. Reliable electrical connection and tampering avoidance can be provided at the distal end of the nichrome wire by utilizing an electrically conductive washer at the distal tip, covering the nichrome wire with high temperature insulating tape, overlying the tape with a pipe clamp and encapsulating the washer, distal end of the nichrome wire, insulating tape and pipe clamp with a high temperature bonding adhesive.

Exhaust assemblies for vehicles and methods of installing exhaust systems on vehicles are disclosed. An exhaust assembly for a vehicle includes an exhaust inlet to receive combustion products from a drive unit, a catalytic converter to control emissions from combustion products received by the exhaust system, and a first piping assembly coupled to the exhaust inlet and the catalytic converter.

The utility model relates to the technical field of water treatment, in particular to photocatalysis integrated water treatment equipment which comprises a base, a shell, a catalyst and a separator, the catalyst is fixedly mounted on the top wall of the base, the shell is fixedly mounted on the top wall of the base, the catalyst is located in the shell, and the separator is located in the shell. An ultraviolet light catalytic device is arranged on the catalytic converter, a water inlet is formed in the bottom of the catalytic converter, a water outlet pipe is arranged at the top of the catalytic converter, one end of the water outlet pipe is fixedly connected with a Venturi tube, the separator is fixedly installed on the top wall of the base, and one end of the water inlet is communicated with the separator. According to the utility model, the separator and the catalytic converter are fixedly arranged on the base to be combined into a whole, the separator and the catalytic converter are utilized to carry out comprehensive water treatment together, a plurality of independent devices do not need to be butted for use, the mounting and dismounting processes are avoided, and an ultraviolet light catalytic device is arranged in the catalytic converter, so that the catalytic treatment effect on algae-laden water is better.

The present invention relates to the technical field of multi-fuel generator sets, relates to a safety control system and control method for a multi-fuel electronic injection generator set, and solves the problems that the consistency between selected fuels and actually supplied fuels cannot be determined and efficient exhaust treatment cannot be guaranteed. The safety control system for a multi-fuel electronic injection generator set comprises an ECU, and a fuel oil electronic injection system and a fuel gas electronic injection system which are electrically connected to the ECU; an electronic fuel selection switch is arranged between the fuel oil electronic injection system and the fuel gas electronic injection system and the ECU; the electronic fuel selection switch is used for selecting, by means of an electronic button, the type of a fuel to be supplied and determining the consistency between the type of the selected fuel and the type of the actually supplied fuel; an exhaust emission control mechanism is arranged between the ECU and an engine; the exhaust emission control mechanism comprises a first oxygen sensor and a catalytic converter; the ECU comprises a correction unit used for improving the catalytic efficiency of the catalytic converter and having a temperature control protection function. The effects of effectively determining the consistency between selected fuels and supplied fuels and realizing high exhaust emission quality are achieved.

An internal combustion engine system includes an internal combustion engine and a main exhaust aftertreatment system with a main catalytic converter configured to receive exhaust gas from the internal combustion engine. A variable geometry turbine (VGT) includes a plurality of vanes movable between a normal operation position and a restricted position. A light-off catalyst bypass system includes a bypass passage and a bypass catalytic converter configured to selectively receive exhaust gas from the internal combustion engine and bypass the VGT. During cold start, long idle, and / or low main catalytic converter temperature conditions, the plurality of vanes are moved to the restricted position to restrict or prevent exhaust gas from flowing through the VGT to facilitate directing the exhaust gas through the bypass passage and the bypass catalyst.

The utility model discloses a catalytic reactor for flow velocity layering in a microchannel, and belongs to the technical field of energy environment equipment. The catalytic reactor for flow velocity layering in the microchannel sequentially comprises an inlet section, an expansion section, a catalyst, a contraction section and an outlet section in the gas flowing direction. A micro-channel is arranged in the catalytic converter, and the micro-channel is arranged in the catalytic converter in the radial direction of the catalytic converter; a reverse Tesla valve and a forward Tesla valve are arranged in the micro-channel; and the number ratio of the forward Tesla valves to the reverse Tesla valves is (0.5-2): 1. According to the utility model, the reverse Tesla valve and the forward Tesla valve are arranged in the micro-channel, so that the purpose of local decomposition of a flow field is achieved, and the contradiction between effective contact between incoming flow and a catalyst and reverse contradiction between system fluid resistances can be coordinated and increased.

The utility model belongs to the technical field of exhaust heat exchangers, and particularly relates to a parallel type automobile exhaust heat exchanger which comprises an exhaust pipe connected to the exhaust end of an engine, and a first three-way catalyst and a heat exchanger assembly are arranged at one end of the exhaust pipe in parallel. The heat exchanger assembly comprises a heat exchange tank and a heat exchange coil pipe connected with an automobile cooling system in series, the heat exchange coil pipe is arranged in the heat exchange tank, a second three-way catalyst used for gas catalysis is arranged at the end, away from the exhaust pipe, of the heat exchange coil pipe, and an adjusting piece used for gas on-off adjustment is arranged between the exhaust pipe and the heat exchange tank. Due to the fact that the heat exchanger assemblies which are installed in parallel with the three-way catalytic converter are additionally arranged, part of high-temperature waste gas can enter the heat exchanger assemblies which are connected in parallel, and the waste gas passing through the first three-way catalytic converter is prevented from being affected by the heat exchanger assemblies.

An exhaust control system for a vehicle includes a temperature sensor located downstream of the exhaust combustor and upstream of the SCR catalytic converter in the exhaust system. The temperature sensor is configured to generate a measurement signal indicating the temperature of the exhaust gas flowing through the exhaust system at the outlet of a DPF located downstream of the exhaust combustor. An exhaust control module is configured to: activate the exhaust combustor to heat the exhaust gas; monitor the temperature of the exhaust gas based on the measurement signal; subsequently activate the exhaust combustor and then deactivate it based on an upper threshold temperature of the exhaust gas; and subsequently deactivate the exhaust combustor and then activate it based on a lower threshold temperature of the exhaust gas. The lower threshold temperature is lower than the upper threshold temperature.

The present invention relates to the field of automotive control technology, and particularly to an engine control method, device, equipment and computer-readable storage medium. The engine control method includes: obtaining the concentration of nitrogen oxides in the original exhaust of the engine at least once through a NOx sensor installed upstream of the three-way catalytic converter, and obtaining the engine torque corresponding to the nitrogen oxide concentration; determining a fuel quality coefficient from a preset ignition control map based on the nitrogen oxide concentration and the engine torque; if the fuel quality coefficient is within a first preset range, controlling the intake pressure of the engine based on the fuel quality coefficient. The present invention realizes detecting the fuel quality in the engine before controlling the intake pressure of the engine, and controlling the intake pressure of the engine based on the fuel quality when the fuel quality is normal, so as to consider the interference of the fuel quality on the intake pressure during the process of controlling the intake pressure, improve the accuracy of controlling the intake pressure of the engine, and thus reduce the pollution of the engine exhaust gas.

A reactive system for the synthesis of methanol from a make-up gas comprising hydrogen and carbon dioxide, comprising a catalytic converter and a steam system, wherein the converter includes at least one internal heat exchanger connected to the steam system and arranged to produce steam with heat of the methanol synthesis reaction, wherein the steam system includes a steam drum separated from the converter, the steam drum being connected to said heat exchanger via a feed line to feed water to the heat exchanger and a steam line to collect steam formed in the heat exchanger, wherein the steam system includes an electrical heater mounted internally in the steam drum and arranged to heat the feed water sent to the converter.

A novel supercharged engine general arrangement structure relates to the technical field of engine research and development. A valve chamber cover and oil filler cap assembly and a rear cam bearing cap assembly are arranged above the engine body; a synchronous chain housing assembly, a generator, a crankshaft pulley assembly and an air conditioner compressor are arranged at the front end; an intake manifold assembly, an electronic throttle body, a thermostat and housing assembly, a fuel gas injection rail assembly and an oil rail assembly are arranged on the intake side; a turbocharger assembly, a three-way catalyst assembly, a water pump and adapter assembly and a water inlet pipe and O-shaped ring assembly are arranged on the exhaust side; a small circulation water return steel pipe assembly, an oil cooler connecting pipe assembly, a flywheel shell assembly and a flywheel disc and gear ring assembly are arranged at the rear end of the flywheel shell assembly; and an oil pan and an oil filter are arranged below. According to the structure that the supercharged engine with the fuel gas and fuel oil dual-fuel supply with the displacement of 2.0 L is overall arranged at the inclination angle of 0-10 degrees, the whole engine is compact in arrangement and integrated in design, and the energy-saving and environment-friendly requirements are met.

Provided herein are methods and systems for treating a sulfur dioxide-containing gaseous stream. The method includes combusting a tail gas in an excess of oxygen gas to yield a thermal oxidizer effluent containing sulfur dioxide and oxygen. The thermal oxidizer effluent is introduced to an oxidative catalytic converter to convert sulfur dioxide to sulfur trioxide, thereby forming an oxidized gas stream. The oxidized gas stream is routed to a quench tower and contacted with a dilute aqueous acid quench stream to yield sulfurous acid, hydrated sulfur dioxide, or both. The sulfurous acid or hydrated sulfur dioxide is oxidized with the excess of oxygen from the thermal oxidizer effluent to yield sulfuric acid.

The embodiment of the invention relates to a dew point recognition method and device of a vehicle exhaust system, a vehicle and a medium, and the method comprises the steps that after the vehicle is started, a first heat integral correction coefficient is determined according to the real-time air inflow, and a second heat integral correction coefficient is determined according to the real-time catalytic converter temperature; according to the preset dew point temperature deviation value, the real-time exhaust temperature, the first heat integral correction coefficient and the second heat integral correction coefficient, a heat integral value is obtained; and determining a dew point integral threshold value according to the engine shutdown duration and the starting exhaust temperature, and determining that the exhaust system enters a dew point stage when the heat integral value is greater than or equal to the dew point integral threshold value. According to the technical scheme, whether the vehicle passes the dew point stage or not is judged according to the actual working condition after the vehicle is started, and the accuracy of dew point stage judgment is improved.

An oven appliance includes a housing defining a discharge vent, a cooking chamber positioned within the housing, an exhaust duct providing fluid communication between the cooking chamber and the discharge vent, an air handler operably coupled with the exhaust duct for urging a flow of heated air from the cooking chamber, through the exhaust duct, and out of the discharge vent, and a catalytic converter assembly. The catalytic converter assembly includes a catalytic element positioned within the exhaust duct for lowering volatile organic compounds from the flow of heated air and a catalyst heater positioned upstream of the catalytic element for selectively heating the flow of heated air.

Examples provide systems and methods for detecting vehicle tamper events without relying on a clear line-of-sight. Namely, examples leverage an intelligent insight that many types of vehicle tamper events have unique audio signatures. Accordingly, examples detect / classify vehicle tamper events based on these unique audio signatures. Moreover, examples can verify these audio-based classifications by analyzing acceleration-related data (e.g., relative acceleration data for a body of a vehicle, relative jerk data for a body of a vehicle, etc.) to determine suspicious movement of a body of a vehicle during a potential / suspected vehicle tamper event. This acceleration-related verification step can reduce occurrence of false positive audio-based classifications caused by other noise events proximate to the vehicle that have similar audio signatures to vehicle tamper events (e.g., drilling or other noise from a construction site, rain, etc.).

A control system for a hybrid electric vehicle having an electric drive module and an internal combustion engine with an exhaust system. The control system includes one or more oxygen (O2) sensors disposed proximate to a catalytic converter in the exhaust system, the one or more O2 sensors each being configured to measure an O2 level of exhaust gas produced by the engine. A controller is in signal communication with the one or more O2 sensors and programmed to detect the hybrid electric vehicle is keyed on, determine the hybrid electric vehicle is keyed to run in an electric vehicle (EV) mode without the engine started, and initiate an O2 sensor heating mode to heat the one or more O2 sensors to a predetermined target temperature prior to the engine starting. The predetermined target temperature is operable for closed loop fueling feedback control, to thereby reduce exhaust emissions.

The invention discloses a sintering machine flue gas purification treatment process which comprises a heating assembly, a catalyst connected to an outlet of the heating assembly and a heat recovery assembly connected to an outlet of the catalyst, and further comprises an amine spraying assembly installed on one side of the heat recovery assembly, and a waste gas inlet of the amine spraying assembly is connected with a waste gas outlet of the heat recovery assembly; the amine spraying assembly comprises a shell, an amine storage tank is placed on one side of the shell, a pressurizing structure is installed on the outer wall, close to the amine storage tank, of the shell, and a liquid suction opening of the pressurizing structure is connected with the amine storage tank; the denitration assembly is mounted on one side of the amine spraying assembly, and a waste gas inlet of the denitration assembly is communicated with a waste gas outlet of the amine spraying assembly. Carbon monoxide in flue gas generated by sintering can be effectively catalytically oxidized into carbon dioxide through the catalytic converter, meanwhile, a large amount of heat energy can be generated, by-product steam can be generated through the additionally-arranged steam furnace and can be directly utilized, and high economic benefits are achieved.

The invention discloses an extended-range automobile electric heating tail gas control method and system. The extended-range automobile electric heating tail gas control method comprises the following steps that a battery capacity interval and the residual capacity of an automobile battery are obtained; determining a corresponding battery capacity interval based on the residual capacity of the automobile battery; based on the corresponding battery capacity interval, the engine state, the first temperature t1 and / or the current required power of the whole vehicle and / or the vehicle speed are / is obtained; according to the corresponding battery capacity interval, whether an electric heater is turned on or not is judged based on the engine state, the first temperature t1 of tail gas exhausted by the three-way catalyst and / or the current required power of the whole vehicle and / or the vehicle speed; and according to the corresponding battery capacity interval, the second temperature t2 of the tail gas discharged by the three-way catalyst and / or the average required power of the whole vehicle are / is obtained, and whether the electric heater is turned off or not is judged. The conversion efficiency of the three-way catalytic converter can be improved, the effect of reducing the emission threshold value is achieved, energy consumption is reduced, and the stroke of the hybrid electric vehicle is increased.

The invention relates to the technical field of three-way catalytic detection, and discloses three-way catalytic converter cold and hot impact resistance detection equipment which comprises a workbench and a CCD camera. An engine exhaust simulation system and a waste gas recovery system which are connected with a three-way catalytic converter are installed on the workbench; and the cold air cooling system is used for rapidly cooling the three-way catalyst. The exhaust gas recovery device is provided with an exhaust gas recovery structure composed of the mounting cover, the force storage piston, the air exhaust piston and the like, residual exhaust gas in the three-way catalyst can be comprehensively purged and recovered under the driving of the driving motor after detection is finished, environmental pollution caused by direct exhaust gas emission is effectively avoided, the environmental protection requirement is strictly met, and meanwhile, the detection efficiency is improved. And the structural design of the equipment is extremely synergetic, a guide block on the rotating disc is matched with an ejector block to push a force storage piston, an air exhaust piston and a push rod to be linked in order, so that the operations of inflating, exhausting, waste gas recycling and jacking part taking are carried out continuously, the energy consumption of the equipment is reduced, and the high efficiency of operation is improved.

The invention provides a durability evaluation method for a three-way catalytic converter and related equipment, and belongs to the field of performance detection.The method comprises the steps that the rack aging time of a target three-way catalytic converter is estimated, and the estimated rack aging time is obtained; determining preset bench test environment information corresponding to the target three-way catalyst; determining a characterization test coefficient corresponding to the preset bench test environment information, wherein the characterization test coefficient characterizes an association relationship between the hydrothermal aging effect and the bench aging effect; according to the characterization test coefficient and the estimated rack aging time, the estimated hydrothermal aging time corresponding to the target three-way catalyst is determined; and based on the estimated hydrothermal aging time, carrying out a hydrothermal aging test on the target three-way catalyst so as to carry out durability evaluation on the target three-way catalyst. According to the method, only the hydrothermal aging test is needed in the evaluation process, rack aging or real vehicle aging test is not needed, the time consumption of the durability evaluation process is reduced, the cost is reduced, and the research and development efficiency is improved.

The invention discloses a welding tool for production of catalytic converter matched parts, and relates to the technical field of catalytic converter welding, the welding tool comprises a power distribution cabinet, a catalytic converter shell and a pipeline, and the upper end of the power distribution cabinet is fixedly connected with a machining table; and the welding mechanism comprises an annular frame fixedly connected to the upper end of the machining table through a support, an annular T-shaped groove is formed in the upper end of the annular frame, a plurality of T-shaped rods are slidably connected to the inner wall of the annular T-shaped groove, a gear ring is jointly and fixedly connected to the upper ends of the T-shaped rods, and a fixing seat is fixedly connected to the inner wall of the gear ring. When pipelines with different pipe diameters are welded, the system can automatically compensate diameter changes, so that the distance between a laser welding head and the surface of a workpiece, namely the defocusing amount, is kept constant, the link that manual repeated adjustment is needed due to workpiece specification changes is eliminated, the production efficiency is greatly improved, the stability of welding process parameters is guaranteed, and the production cost is reduced. And the consistency and the reliability of the welding seam quality are guaranteed from the source.

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.

The utility model discloses an air inlet structure of a three-way catalyst, and belongs to the technical field of air inlet structures of three-way catalysts. The three-way catalytic converter comprises a three-way catalytic converter body, an air inlet end cone is communicated with the three-way catalytic converter body, an installation cylinder is arranged in the air inlet end cone, a circular ring is installed at one end of the installation cylinder, a filter screen is installed at the other end of the installation cylinder, and the filter screen is arranged in the air inlet end cone. According to the three-way catalytic converter, the installation cylinder is sleeved with the air inlet end cone, the installation cylinder and the circular ring form a whole, the filter screen at one end of the installation cylinder can intercept and filter impurities in flowing-in waste gas, the waste gas catalytic efficiency of the three-way catalytic converter is improved, the air inlet end cone, the three-way catalytic converter body and the exhaust manifold can be separated from an external waste gas conveying pipeline, and therefore the waste gas can be discharged conveniently. The circular ring and the cylinder are separated from the interiors of the clamping groove and the circular hole, so that a user conveniently takes the circular ring to drive the mounting barrel to be taken out from the interior of the air inlet end cone, and the filter screen is conveniently cleaned.