1645 results about "Automotive exhaust" patented technology

The invention discloses a remote sensing monitoring system for automotive exhaust emission of an urban road network. The system is mainly composed of a remote measurement device layer, a site selection and position arrangement layer, and a data processing layer. Through mobile, horizontal and vertical exhaust remote measurement devices, real-time data of the automotive exhaust emission in running is obtained; by adopting an advanced site selection and position arrangement method, the remote measurement devices are scientifically networked; and in combination with external data of weather, traffic, geographic information and the like, the real-time remote measurement data of the automotive exhaust emission is subjected to intelligent analysis and data mining by adopting big data processing and analysis technologies such as deep learning and the like, and key indexes and statistical data with optimal identification performance are obtained, so that effective support is provided for government departments to make related decisions.

The invention relates to a multi-hole foamed metal material and the manufacturing method. It includes the following steps: equally dispersing metal or alloy powder that has the particle diameter at 1-100um into solution contains adhesive agent to make slime, pouring the slime into through-hole polyurethane sponge foam, after taking drying and sintering, the material would be gained. It also could be make by the method of directly isostatic cool pressing one or more metal or alloy powder, isostatic cool pressing after mixing with pore forming material or isostatic cool pressing after mixing with adhesive agent solution to gain green pressing that would be sintered in vacuum furnace to make the material. The invention could be used to process vehicle tail gas and could also be used to filter the smoke form thermal power station or metallurgical furnace.

The exhaust sound and emission control system is a system for reducing sound and noxious emissions from an automotive exhaust. The system may have an exhaust resonator having one or more catalytic converter elements in combination therewith in a single device. Alternatively, the system may have multiple angularly disposed chambers therein, with a series of V-shaped baffles or guides in one of the chambers, thereby combining resonator and muffler functions in a single device. In another alternative, the system has a series of longitudinal tubes therein, in combination with a series of V-shaped guides or vanes, combining catalytic converter, muffler, and resonator functions in a single device. The various elements of the different embodiments, e.g. catalytic converter element(s), double wall shell, perforated tubes and multiple flow paths, interconnecting crossover tubes, etc., may be combined with one another as practicable.

The invention discloses an automotive exhaust emission data fusion system. The automotive exhaust emission data fusion system comprises a roadside air pollutant concentration estimation module, a roadside air pollutant concentration prediction module, a city global atmospheric environment prediction module, an automotive exhaust emission factor estimation module and an automotive exhaust emission feather analysis module, wherein the five modules are used for respectively realizing different data analysis functions, and the different functions can be realized by virtue of the different modules; the modules can be independently used, or two or more modules can be combined for use, so as to realize the storage, analysis and fusion of automotive exhaust telemetering data, automotive attributes, driving working stations, detection time and meteorological condition data; and by combining with a vehicle-mounted diagnosis system database, a portable emission test system database, a vehicle inspection station offline database, a traffic information database and a geographic information database, automotive exhaust telemetering data is analyzed, and the highest discriminatory key indexes and statistical data are acquired, so that effective supports are provided for the formulation of relevant decisions of government departments.

Nanocomposite copper-ceria catalysts are provided, which comprise copper oxide nanoparticles, copper nanoparticles, or a mixture thereof combined with ceria nanoparticles. Methods for making such catalysts are also provided, which involve the steps of (i) combining ceria nanoparticles in an aqueous suspension with copper 2,4-pentanedionate to form a slurry; (ii) heating the slurry formed in step (i) under an inert gas atmosphere or an oxygen-argon atmosphere, at a temperature and for a time sufficient to cause decomposition of the copper 2,4-pentanedionate to form copper nanoparticles and / or copper oxide nanoparticles that are combined with the ceria nanoparticles; and (iii) optionally, subjecting the product formed in step (ii) to a heat treatment process under conditions effective to convert at least some of the copper nanoparticles to copper oxide nanoparticles. The nanocomposite copper-ceria catalysts are useful for low-temperature and near-ambient temperature catalysis, such as the oxidation of carbon monoxide, the reduction of nitric oxide and the conversion of hydrocarbons. The nanocomposite copper-ceria catalysts have a variety of potential applications, for example, in vehicle exhaust emission systems of automobiles and diesel engines, cold starting of automobile engine, fuel cells, lasers, hydrocarbon conversion reactors, air filters for the conversion of carbon monoxide and / or indoor volatile organic compounds, and smoking articles.

A process for the reduction of oxides in a gas stream (e.g., automotive exhaust) uses a catalyst comprising a molecular sieve having the CHA crystal structure and having a mole ratio of greater than 50 to 1500 of (1) an oxide selected from silicon oxide, germanium oxide or mixtures thereof to (2) an oxide selected from aluminum oxide, iron oxide, titanium oxide, gallium oxide or mixtures thereof.

A catalyst with high activity for cleaning the tail gas of car is prepared through preparing the coated composite alumina layer containing Ce, Zr and one or more of La, Pr, Y, Fe, Mn, Cu and Ba on the cellular cordierite ceramic carrier, and chemically plating Pd.

A one-step preparation method and an application of supported platinum-based multi-metal catalysts are provided. The one-step preparation method comprises the specific steps: evenly mixing a carrier with an aqueous solution of a reducing agent, a surfactant, a platinum metal precursor and a non-platinum metal precursor, carrying out a reaction for 0.5-5 hours, and washing for multiple times at a low temperature (less than or equal to 100 DEG C) to enable the surfactant and other by-products in the product to be effectively removed. The platinum-based multi-metal catalysts having different metal loads (10-95 wt%) and different compositions and supported by different carriers are obtained, and the prepared supported platinum-based multi-metal catalysts are nanoparticles evenly dispersed on the surface of the carrier. The supported platinum-based multi-metal catalysts can be prepared through the one-step reaction, the reaction conditions are mild, operations are simple, the reaction is rapid, and synthesis is easy to enlarge. The prepared supported platinum-based multi-metal catalysts can be applied in the fields of petrochemical industry, chemical pharmacy, automobile tail gas purification and fuel cells.

The invention provides an automobile exhaust purifying catalyst and a preparation method thereof. Honeycomb ceramics are used as a carrier, activated aluminum oxide and an oxygen storage material are used as a coating, noble metals of palladium and rhodium are used as activated components of the catalyst; the coating is of a double-layered structure, wherein a first-layer load is loaded on the carrier, and contains the activated aluminum oxide and the oxygen storage material; a second-layer load is loaded on the first coating and contains the activated aluminum oxide along with or without the oxygen storage material; the activated components of the noble metals of palladium and rhodium are respectively loaded on different materials; a metal and / or oxide load of rhodium is loaded on the first-layer oxygen storage material, and a metal and / or oxide load of palladium is loaded on the second-layer activated aluminum oxide. The automobile exhaust purifying catalyst has the advantages of good low-temperature combustion activity and good anti-aging performance and can satisfy the requirement for low emission.

The invention relates to a method for recovering noble metals from spent automotive exhaust catalysts, comprising the following processes: 1. mixing the spent automotive exhaust catalyst with a reducing agent, an additive and a trapping agent; 2. putting the mixed materials into a clay graphite crucible, and putting the clay graphite crucible into an electric furnace or an electric arc furnace for smelting, thus obtaining a noble metal phase; 3. selectively leaching base metals from the noble metal phase, thus obtaining the enrichment of the noble metal, refining the enrichment of the noble metal to produce platinum, palladium and rhodium products. The method is characterized by simple process flow and high recovery rates of noble metals. The platinum, palladium and rhodium in the waste slag are less than 1g / t and the product purity is 99.95%.

An anti-theft system for protecting a vehicle exhaust component (4) is described. The system includes a sensor (1) configured to monitor vibrations associated with a vehicle exhaust system (5)and a controller (2) arranged to monitor a signal from the sensor (1). The controller (2) is configured to generate an alarm event if the signal from the sensor includes characteristics indicative of vibrations associated with an attempted theft of the vehicle exhaust component (4).

A catalyst system to be used in an automobile exhaust gas purification apparatus which exerts excellent purification capability to a nitrogen oxide, even when hydrocarbon concentration varies, by subjecting exhaust gas discharged from an automotive internal engine to contacting with a catalyst, an exhaust gas purification apparatus using the same, and an exhaust gas purification method.A catalyst system etc. to be used in an automobile exhaust gas purification apparatus, composed by using two or more exhaust gas purification catalysts, containing a first catalyst supported on an inorganic structural carrier and a second catalyst other than this, characterized by having the first catalyst supported on apart of the inorganic structural carrier positioned at the upstream side, when arranged in an exhaust gas passage; on the other hand having the second catalyst supported on a part of the inorganic structural carrier, positioned at the downstream side, when arranged in an exhaust gas passage; and containing a cerium-zirconium-type composite oxide (A) having a pyrochlore phase in the crystal structure.

Accelerated heating of automotive exhaust system components is effected by controlling the application of supplemental electrical loads to the vehicle electrical system thereby increasing engine load and increasing exhaust heat. Alternative strategies are disclosed for implementing the invention through control of electrical and engine management system parameters.

The invention relates to a preparation method of cerium oxide nanoballs, and belongs to the technical field of the preparation processes of the inorganic nanomaterials. The key points of the method of the invention include: stirring and mixing cerium salt and a certain amount of surfactant at room temperature, dissolving the mixture in a mixed solution of water and an organic solvent and ultrasonically processing the mixture for 5 to 10 minutes, wherein the cerium salt is optimally cerium nitrate; the surfactant is most preferably polyvinylpyrrolidone; and the belonged organic solvent is most preferably diglycol; then transferring the mixed solution into a high pressure reaction kettle to perform a solvothermal reaction; heating the mixed solution to perform reaction for 24 to 28 hours at the temperature of 100 to 200 DEG C so as to obtain the cerium oxide nanoball sol; evaporating the sol at the temperature of 1500 o 180 DEG C to dryness; and forging the obtained powder for 1 to 4 hours at the temperature of 400 to 600 DEG C; and finally obtaining the cerium oxide nanoballs in the shape of yellow solid powder. The nanoballs have a particle size ranging from 30 to 160nm and high performance and can be applied in fields of ultraviolet light shielding, mechanical polishing and automobile exhaust catalyzation and the like.

An austenitic stainless steel comprises, by weight, 9 to 23% chromium, 30 to 35% nickel, 1 to 6% molybdenum, 0 to 0.03% titanium, 0.15% to 0.6% aluminum, up to 0.1% carbon, 1 to 1.5% manganese, 0 to less than 0.8% silicon, 0.25 to 0.6% niobium and iron. Embodiments of austenitic stainless steels according to the present invention exhibit enhanced resistance to corrosion. Thus, the stainless steels of the present invention may find broad application as, for example, automotive components and, more particularly, as automotive exhaust system flexible connectors and other components, as well as in other applications in which corrosion resistance is desired.

A device for treating fluids, such as automotive exhaust gases is provided, as well as a method of manufacturing such a device. The invention provides a honeycomb structure, a matrix of ceramic walls that defines a plurality of parallel, fluid-conducting cells oriented along an axis, arranged in a stacked or discontinuous configuration between an inlet and outlet, where adjacent layers of honeycomb structure are separated by layers of air spaces. Each matrix layer has opposing faces that defines the inlets and outlets of the cells, and a peripheral portion or peripheral region including an outer skin. The peripheral portions or peripheral regions of adjacent stacked ceramic layers are mutually contiguous to prevent fluid flowing through the stacked ceramic layers from leaking between said outer skins.

An austenitic stainless steel comprising, by weight, 17 to 23% chromium, 19 to 23% nickel, 1 to 6% molybdenum. The addition of molybdenum to the iron-base alloys of the invention increases their resistance to corrosion. The austenitic stainless steel may consisting essentially of, by weight, 17 to 23% chromium, 19 to 23% nickel, 1 to 6% molybdenum, 0 to 0.1% carbon, 0 to 1.5% manganese, 0 to 0.05% phosphorus, 0 to 0.02% sulfur, 0 to 1.0% silicon, 0.15 to 0.6% titanium, 0.15 to 0.6% aluminum, 0 to 0.75% copper, iron, and incidental impurities. Austenitic stainless steels according to the present invention exhibit enhanced resistance corrosion by salt at a broad temperature range up to at least 1500° F. Thus, the stainless steel of the present invention would find broad application as, for example, automotive components and, more particularly, as automotive exhaust system components and flexible connectors, as well as in other applications in which corrosion resistance is desired.

The invention relates to a preparation method and application of a Lal-xSrxCoO3 perovskite catalyst. The preparation method comprises the following steps of: mixing the nitrites of La, Sr and Co, adjusting pH to 4-5 to form sol in presence of citric acid and EDTA (Ethylene Diamine Tetraacetic Acid) which are used as complexing agents, drying and baking to prepare a perovskite sample, and grinding and screen to obtain the catalyst. The prepared Lal-xSrxCoO3 perovskite catalyst is used for eliminating nitric oxides in automobile exhausts in a storage mode. The invention has the advantages that the preparation and test process is simple, raw material can not be noble metal, and the preparation cost is greatly reduced. The prepared Lal-xSrxCoO3 perovskite catalyst has high storage of nitric oxides, and greatly improves the efficiency for eliminating NOx in the automobile exhaust.

A method of non-intrusive monitoring of catalyst performance in an automotive exhaust system uses a model of catalytic converter operation emphasizing oxygen storage capacity dominance. Model parameters are identified using a recursive Kalman filtering technique. A catalyst diagnostic index is derived from at least one identified parameter, and the index is used to judge converter performance.

The invention relates to the technical field of chemical industry and relates to a multifunctional diesel composite additive capable of reducing the oil consumption and reducing the pollution of the exhaust emission. The diesel composite additive is mainly formed by uniformly mixing a clearing agent, a smoke abatement combustion improver, a cetane number improver, a pour point reducer, an antioxidant, a metal corrosion inhibitor and a cosolvent. The diesel composite additive can improve the clearness, the low-temperature mobility, oxidation resistance and corrosion resistance of the diesel, also can improve the combustion performance of the fuel, can reduce the oil consumption and can reduce the pollution of the exhaust emission.

The invention relates to a thermoelectric conversion automotive power supply system using waste heat from automobile exhaust and a control method thereof, wherein the system is composed of an engine unit, a thermoelectric conversion unit, an output and electric energy storage unit and a detection and control unit. The system is characterized in that high temperature exhaust is discharged during the running of the engine and cooling water in a certain temperature range is provided; the heat brought by the high temperature exhaust is absorbed by hot terminals of a plurality of thermoelectric modules connected in series in the thermoelectric conversion unit, and cold terminals of the thermoelectric modules form temperature difference between the hot terminals and the cold terminals under thecooling effect of the cooling water of the automotive engine, so as to generate direct-current electric energy; the voltage and the current of the electric energy generated from the thermoelectric conversion unit are regulated by the output and electric energy storage unit, and the electric energy is used to supply on-vehicle appliances and ISG or charge the energy storage battery; the detection and control unit is used for detecting parameters, sending a control command and performing comprehensive energy management on the system. The system effectively recycles and utilizes the waste heat from the automobile exhaust, improves the economical efficiency of the fuel of the automotive engine, and is contributed to reducing the automobile exhaust emission.

A fast light off flow-through ceramic substrate is provided that is particularly adapted for use as a catalytic converter. The substrate is formed from a body of ceramic material having axially opposing inlet and outlet ends for receiving and expelling the flow of automotive exhaust gas, respectively. The body contains a network of walls coated with a catalyst that define axially-oriented flow-through cell channels. The average thermal mass (ATM1) of a first axial region of the walls adjacent to the inlet end is at least 20% less than the average thermal mass (ATMTOT) of all of the walls. The lower average thermal mass of the walls in the first region advantageously shortens the light off time for the catalyst within the substrate to effectively neutralize automotive pollutants. The reduction of the average thermal mass in only the first axial region of the walls advantageously maintains the strength of the resulting body of ceramic material, and further increases the cool down time of the body.

The present invention belongs to the field of automobile tail gas purifying technology, and is especially glass ceramic coating on metal or alloy carrier of automobile tail gas purifying treater and its preparation process. The oxides of the glass coating include silica in 25-65 wt% and boron oxide in 5.0-27 wt%, except the mixture of other 3-9 oxides selected from 17 kinds of oxides, including sodium oxide, potassium oxide, lithium oxide, aluminum oxide, calcium oxide, etc. The glass coating on the metal carrier can raise the mechanical strength and reaction activity of the catalyst effectively, and this results in saving in active component and lowered cost.

The invention relates to a porous conductive ceramics, in particular to a porous conductive MAX phase (Ti3SiC2, Ti3AlC2 or Ti2AlC) ceramics with a through hole structure, and a preparation method and a use thereof. The porosity of the porous ceramics is adjustable within the range of 20-65%, the ceramics comprises a through hole structure, and the openporosity is more than 85%. The preparation method comprises the steps of taking MAX phase ceramic powder as a raw material, molding, carrying out pressureless sintering in an atmosphere furnace, keeping the sintering temperature at 1200-1400 DEG C, and leading the sintering time to be 0.5-3 hours. The MAX phase conductive ceramics with the through hole structure prepared by the pressureless sintering method can be used as a catalyst carrier material for automobile exhaust purification. The invention can solve the problems of liquid phase, a large number of closed pores in the generated hole and the like during the sintering process by optimizing the molding pressure, the sintering temperature and the time precise control of the porosity.

The invention relates to a jet control system utilizing air power to atomize urea reductant, which is characterized in that the air inlet end of a compressed air main pipe is provided with a pressure regulating valve, the air outlet end thereof is respectively communicated with a compressed air branch pipe for a blowing nozzle and a urea reductant storage tank compressed air branch pipe; the urea reductant storage tank compressed air branch pipe is connected on a urea reductant container; the compressed air branch pipe for the blowing nozzle is communicated with a single-cavity urea reductant nozzle, one end of a urea reductant delivery pipe is arranged in the urea reductant container, the other end thereof is communicated with the urea reductant nozzle, and a temperature sensor arranged on the exhaust pipe of an engine and a nitric oxide sensor are electrically connected with a control unit. The filtered urea reductant is mixed and atomized in the urea nozzle through being driven by the power of compressed air, and is atomized in the single-cavity nozzle by depending on the regulation and control of a flow solenoid valve, thereby achieving purification treatment on NOX in car tail gas. The invention has reliable system, low cost and strong practicability.

The exhaust sound and emission control systems comprise a series of embodiments of devices for reducing sound and noxious emissions from an automotive exhaust. The system may have an exhaust resonator having one or more catalytic converter elements in combination therewith in a single device. Alternatively, the system may have multiple angularly disposed chambers therein, with a series of swept baffles or guides in one of the chambers, thereby combining resonator and muffler functions in a single device. In another alternative, the system has a series of longitudinal tubes therein in combination with a series of V-shaped guides or vanes, combining catalytic converter, muffler, and resonator functions in a single device. The various elements of the different embodiments, e.g. catalytic converter element(s), double wall shell, perforated tubes and multiple flow paths, interconnecting crossover tubes, etc., may be combined with one another as practicable.