1272 results about "Catalytic converter" patented technology

Methods and systems providing a process for cooling and liquefying a purified gaseous hydrogen feed stream to a liquid hydrogen stream that may be stored in a liquid hydrogen storage tank, as well as a system wherein ortho-hydrogen (o-H2) contained in the purified gaseous hydrogen feed stream may be converted to para-hydrogen (p-H2) through serial low-temperature catalytic converters along the cooling process from normal ambient temperature (300K) to the liquefied temperature about (20K) of the hydrogen.

The invention discloses a control method and system for preventing crystallization blockage of a urea nozzle. The method comprises the steps that S100, the engine state, the environment temperature, the exhaust flow and the exhaust temperature are obtained; and S200, based on the environment temperature, the exhaust flow and the exhaust temperature, exhaust energy is obtained through calculation. And S300, based on the exhaust energy, the urea rate is obtained through calculation. And S400, based on the state of the transmitter and the exhaust temperature, whether the continuous urea spraying stopping time reaches a preset limiting value or not is judged. And S500, if the urea spraying stopping continuous time exceeds the preset limit value, urea is sprayed to the catalytic converter according to a preset method on the basis of the urea rate. Therefore, according to the control method for preventing crystallization blockage of the urea nozzle, crystallization blockage of the urea nozzle can be effectively prevented, faults are reduced, and influences on normal operation of a vehicle and extra maintenance cost are avoided.

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.

A mobile and stationed charging system for electric cars designed to expand the charging infrastructure instead of the limited charging stations connected to public electricity networks, charging on the power of soundless electric generators to avoid noise, and operating on gasoline, diesel, natural gas, or hydrogen. To protect the environment, palladium is used in the catalytic converter to purify the exhaust gas, and a third level rapid charging device “high power charger” (HPC) is added. Fixed stations are integrated within the scope of traditional gas stations and may share with them the use of one of the fuels. Mostly they are independent. They can be installed and operated anywhere, either mobile stations on conventional or electric self-driving cars or with a driver with sufficient fuel tanks, with communication devices to meet charging requests anywhere. The charging system could be a solution for expanding the charging infrastructure.

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.

A method for supplying power to a heating device for a motor vehicle is described, in which the motor vehicle includes: a) an electric network; b) a catalytic converter including an electric heating device connected to the electric network; c) a battery electrically connected to the electric network; and d) an electric machine electrically connected to the electric network. The method includes: a) detecting a request for activation of the heating device; b) activating the generator mode of the electric machine; c) sending a voltage delivery instruction to the electric machine in order to supply the electric network with power; d) detecting a request for deactivation of the heating device; and e) deactivating the generator mode of the electric machine and a step of disconnecting the heating device.

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.

The invention discloses a control strategy for reducing NH3 emission of a hydrogen-ammonia engine. The control strategy comprises the steps that the rotating speed, the load, the pressure in an air cylinder, the air flow entering the air cylinder, the hydrogen injection amount, the ammonia injection amount and the exhaust temperature of the engine are monitored in real time; the maximum value of the in-cylinder pressure at the moment is calculated from a cylinder pressure model according to the rotating speed and the load of the engine, the maximum value of the in-cylinder temperature at the moment is calculated from an exhaust model according to the exhaust temperature detected by a sensor in front of a catalytic converter, and the in-cylinder air-fuel ratio at the moment is calculated according to the hydrogen injection amount, the ammonia injection amount and the air flow; an unburned ammonia model is established according to the characteristics affecting ammonia emission, and the unburned ammonia proportion at the moment is calculated through the unburned ammonia model; according to the size of the ammonia unburned proportion, the ammonia emission risk at the moment is recognized; and the maximum value of the hydrogen-ammonia injection amount is calculated through the ammonia leakage limiting coefficient, the theoretical air-fuel ratio and the air inflow and used for restraining the total hydrogen-ammonia injection amount. And the unburned ammonia proportion of the ammonia gas in the air cylinder can be effectively controlled.

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 invention belongs to the technical field of diesel engine emission reduction, and particularly relates to a diesel engine nitrogen oxide reducing agent PN emission characteristic test system and test method. The diesel engine nitrogen oxide reducing agent PN emission characteristic test system comprises a combustor, a filter, a mixing pipe, an SCR catalyst and an ASC catalyst which are communicated in sequence. The combustor is used for introducing fuel and carrying out combustion reaction; the filter is used for filtering upstream particulate matters generated by combustion reaction; the mixing pipe is used for introducing a nitrogen oxide reducing agent and a simulation gas component, and is used for mixing the filtered combustion product, the nitrogen oxide reducing agent and the simulation gas component to form a mixed gas; the SCR catalyst is used for promoting a catalytic reduction reaction of the mixed gas; the ASC catalyst is used for carrying out ammoxidation reaction; and a downstream particle counter is arranged at an outlet of the ASC catalytic converter. By using the PN emission characteristic test system for the nitrogen oxide reducing agent of the diesel engine in the technical scheme, the particulate matter emission level of the nitrogen oxide reducing agent of the diesel engine can be tested.

A security device to deter catalytic converter theft is a wire mesh flexible cage wrapped around a catalytic converter of a vehicle. A frame chain is secured to a vehicle frame and extends to secure to a shoulder bolt, which projects outward from a hasp tube. A shear nut is secured to a distal end of the shoulder bolt. Two fender washers may be on the shoulder bolt—one adjacent to the shear nut and the other adjacent an end of the hasp tube out of which projects the shoulder bolt. The portion of the frame chain that is secured to the shoulder bolt is sandwiched between the two fender washers. The hasp tube is part of a hasp, which has plates secured to the wire mesh of a portion of the flexible cage underneath.

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.

The flue gas treatment equipment with the low-temperature SCR denitration function comprises a flue gas treatment machine box, a gas inlet pipe is fixedly connected to the left side of the flue gas treatment machine box, a scrap collecting frame is placed at the bottom, close to the left side of the flue gas treatment machine box, of the flue gas treatment machine box, and a water inlet pipe is fixedly installed on the front side of the flue gas treatment machine box; a sealing partition plate is fixedly connected to the inner wall of the flue gas treatment machine box, a water filtering screen plate is fixedly connected to the left side of the sealing partition plate, an exhaust pipe is fixedly connected to the right side of the sealing partition plate, and an SCR denitration catalyst is fixedly installed in the middle, close to the inner wall of the flue gas treatment machine box, of the flue gas treatment machine box. According to the flue gas treatment device disclosed by the utility model, through the matching of the structures, particle impurities in flue gas are removed by adsorbing water through the arrangement of the flue gas treatment case, and then the flue gas is desulfurized, purified and filtered through the SCR denitration catalyst and the multi-layer filter frame, so that the effects of carrying out triple filtration on the flue gas, adsorbing SCR denitration and filtering in sequence are realized.

The invention discloses a National VI automobile exhaust after-treatment system, belonging to the technical field of automobile exhaust treatment, comprising an exhaust pipe front section, an exhaust pipe rear section, a control system, and an exhaust gas temperature regulator, a DOC, a DPF, an SCR, an ASC ammonia slip catalyst and a pyrolyzer which are sequentially connected in series between the exhaust pipe front section and the exhaust pipe rear section; the control system is composed of a controller, a first temperature sensor installed at an SCR inlet end, a second temperature sensor installed at a DPF inlet end, a first pressure sensor installed at a DPF inlet end and a second pressure sensor installed at a DPF outlet end; the system can control the emission temperature and airspeed of all working conditions, implement high temperature protection for the catalyst of each device, and control the minimum filter layer of the DPF during continuous passive regeneration; the contact opportunity between the exhaust gas and the catalyst is increased, and the maximum efficiency maximization and the back pressure minimization can be achieved at the same time; the catalyst of the patent has a fast cold start, high conversion efficiency in each working condition, small exhaust resistance, stable performance, long service life and low cost.

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 invention discloses an engine starting control method, device and equipment and a storage medium, relates to the technical field of engine control, and discloses an engine starting control method which comprises the steps that when an engine starting request is received, the engine starting water temperature and the environment pressure are obtained, based on the engine starting water temperature and the environment pressure, whether catalytic converter heating is activated or not is determined, and a catalytic converter heating activation result is obtained; the air inlet pressure and the engine rotating speed are obtained, and the air inlet flow and the starting ignition angle are determined based on at least one of the catalytic converter heating activation result, the engine starting water temperature, the air inlet pressure and the engine rotating speed; oil injection times and shutdown duration are obtained, and a starting target air-fuel ratio is determined based on the engine starting water temperature, the environment pressure, the oil injection times and the shutdown duration; and the engine is controlled to be started according to the air inlet flow, the starting ignition angle and the starting target air-fuel ratio. According to the scheme, the starting process of the engine can be accurately controlled, and efficient and safe starting of the engine is achieved.

A combined heat and power system for generating power using a hydrogen internal combustion engine and producing usable heat from the exhaust gases of the hydrogen internal combustion engine is described. The system includes a heat exchanger and reduction device, such as a catalytic converter. The heat exchanger may extract heat from the exhaust gases upstream of the catalytic converter and thereby control the heat of exhaust gases provided to the catalytic converter for reduction of exhaust gases. The catalytic converter may use hydrogen as a reducing agent, thereby using the same fuel source for powering the engine and reduction of the exhaust gases rather than separate working fluids. The heat exchanger and / or operating parameters of the system may be controlled to control a temperature of exhaust gases at the catalytic converter and thereby control efficiency of the conversion of exhaust gases.

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.

The invention discloses a urea injection control method and device of a post-treatment device, a medium and equipment. The method comprises the following steps: measuring ammonia storage limit values of a selective catalytic reducer under different working condition information and an ammonia conversion rate of an ammonia escape catalyst through experiments; collecting a first temperature and a first nitrogen oxide content at an inlet of a selective catalytic reducer and a second temperature at an outlet of an ammonia escape catalyst; querying a current ammonia storage limit value of the selective catalytic reducer; calculating the current ammonia storage amount of the selective catalytic reducer; if the current ammonia storage amount is larger than the current ammonia storage limit value, the current ammonia conversion rate of the ammonia escape catalyst is inquired; based on the current ammonia conversion rate, the current urea injection amount is corrected, and the selective catalytic reducer and the ammonia escape catalyst are decoupled, so that the urea injection amount can be controlled based on the respective characteristics of the selective catalytic reducer and the ammonia escape catalyst, the control precision is improved, and ammonia leakage is reduced.

The invention relates to the technical field of engines, in particular to a waste gas utilization device of an automobile engine, which comprises a turbocharger shell, an exhaust pipe connected with the turbocharger shell, a worm gear rotating shaft arranged on the turbocharger shell, an aerostatic press rotating shaft, and a waste gas utilization device of the automobile engine, the bypass valve is not opened, the transmission proportion of the worm gear rotating shaft is reduced through the variable speed transmission assembly, then the rotating speed of the aerostatic press rotating shaft is reduced, and therefore the problem that the pressure is too high is avoided, and it is guaranteed that the aerostatic press can continuously and efficiently work; and after the air pressure in the high-pressure air tank reaches a certain value, the air is discharged from the spraying pipe through the air discharging assembly to flush the three-way catalyst in the exhaust pipe, so that the working effect of the three-way catalyst is improved, and meanwhile, the utilization efficiency of waste gas is improved.

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.