36 results about "Diesel Exhaust Particulate" patented technology

A structure for use in high temperature applications and including a porous ceramic material consisting essentially of about 50-90 percent by weight iron or magnesium stabilized aluminum titanate (AlTiO5) and about 10-50 percent by weight strontium feldspar (SrO.Al2O3.2SiO2), and having a coefficient of thermal expansion over a temperature range from room temperature to 1000° C. of about -10x10-7 / ° C. to +15x10-7 / ° C., a heat capacity at 500° C. greater than 3.2 J / cm3K, a porosity of about 15-50 percent by volume, preferably 40-50 percent by volume, and a median pore size of about 5-50 micrometers, preferably 8-15 micrometers. The structure is especially useful as a diesel exhaust particulate filter.

A particulate converter for the collection and the incineration of particulate matters from diesel engine exhaust includes an exhaust path extending from the diesel engine through the particulate converter. The particulate converter further includes a housing and at least one candle located in the housing. An electrical incineration system may be electrically connected to a pulsed power supply forincinerating soot collected within the candle. A diesel oxidation catalyst (DOC) may be disposed in the exhaust path to generate sufficient amount of NO2 to assist in incineration. At least one exhaust cooling device may be provided for the control of exhaust temperature. A feedback control system may control exhaust gas temperatures based on pressure drop across the DPC, temperature ahead of theDPC and engine RPM.

The invention relates to a method for preparing silicon-boron-carbon-nitrogen porous ceramic with a nano pore structure. The method comprises the following steps: uniformly mixing boron trichloride, aniline and simethicone according to a ratio of 1:1:2.5, and heating to react to prepare an organic precursor; then dipping nano polyacrylonitrile fibers in the organic precursor and performing heat preservation at a certain temperature; finally sintering the mixture in a high-purity nitrogen atmosphere, and cooling the mixture to room temperature with the furnace after the heat preservation is finished, wherein after the high temperature nitrogen treatment, the nano polyacrylonitrile fibers are corroded to form silicon-boron-carbon-nitrogen (Si-B-C-N) porous ceramic with the nano pore structure. The aperture of the obtained silicon-boron-carbon-nitrogen (Si-B-C-N) porous ceramic is 150-300 nm, the porosity is up to 78-90%, the silicon-boron-carbon-nitrogen (Si-B-C-N) porous ceramic is high temperature resistant, oxidation resistant, free of obvious oxidation at 950 DEG C in an air atmosphere, and free of obvious loss of mechanical property at 1100 DEG C. The silicon-boron-carbon-nitrogen (Si-B-C-N) porous ceramic can be applied to a diesel exhaust particulate filter (DPF) carrier.

The invention discloses a post-treatment method for diesel engine exhaust particulates, which uses high-energy electrons generated by local dielectric barrier corona discharge with relatively small discharge power to charge diesel exhaust particulates, and charges the exhaust particulates of diesel engines through foam ceramics placed in an alternating electric field. Filtration of diesel engine exhaust particles; when the amount of diesel exhaust particles accumulated in the foam ceramics causes the exhaust back pressure of the diesel engine to rise, a large discharge power is used to fill the entire space of the dielectric tube with a filamentary discharge, generating a large amount of low-temperature plasma Oxidatively decomposes the diesel exhaust particles accumulated in the foam ceramics to realize the regeneration of the foam ceramic filter body. The invention can ensure that the exhaust back pressure of the diesel engine is low and effectively avoid damage to the filter body during regeneration, and at the same time improve the filtering efficiency of the exhaust particles of the diesel engine. The invention can be applied to aftertreatment of exhaust particulates of diesel engines.

The invention discloses an exhaust particulate matter charging and charging capacity measuring device of a diesel engine. The exhaust particulate matter charging and charging capacity measuring device comprises a water removal device, a charging reactor and a Faraday cylinder of an improved structure. The water removal device comprises a cooling system and a heating system. The charging reactor comprises a bobbin type corona generator and a positive / negative high voltage power source. The Faraday cylinder of the improved structure comprises a PVC pipe, a first metal net, a second metal net, a rubber pipe, a filter paper bracket, a quick connector, a stainless steel inner barrel, a stainless steel outer barrel and a flow control system. Water in exhaust of the diesel engine is reduced through the cooling system, the exhaust is made to be constant at certain temperature through the heating system, the heated exhaust is then introduced into the charging reactor to react, and therefore particulate matter is charged. On-line measurement is adopted in the whole charging capacity measurement process, the charging capacity of the particulate matter is measured through the Faraday cylinder of the improved structure, and the charged particulate matter is captured through filter paper. By means of the positive / negative high voltage corona discharge technology, real-time capturing of the particulate matter of the diesel engine and measurement of the charging capacity are achieved.