摘要:
The invention relates to a sensor element for gas sensors for determining the gas constituents of a gas mixture, especially in exhaust gases of internal combustion engines. Said sensor element comprises at least one electrochemical measuring cell and at least one porous layer (24) that is exposed to the gas mixture. Said porous layer (24) contains palladium, platinum, ruthenium, an alkali metal and/or an alkaline earth metal, platinum being contained in the porous layer (24) in a minimum concentration of 1.5 % by weight. The invention also relates to a method and an impregnating solution for producing the sensor element.
摘要:
The invention relates to a composition for producing a ceramic material, which comprises ceramic particles and pore-forming particles having particle sizes in the nanometer range (“nanoparticles”), wherein the pore-forming particles comprise a material which can be chemically or thermally decomposed or reacted, burned or washed out during the production process for the ceramic material so that the finished ceramic material has pores having diameters in the nanometer range.
摘要:
The invention relates to a filter for removing particles from a gas stream, in particular for removing soot particles from an exhaust gas stream of an internal combustion engine, with a filter body made of a ceramic filter substrate, wherein the filter substrate is coated. The coating contains at least one of the following substances: (a) at least one aluminum oxide selected from alpha-, gamma-, delta- and theta aluminum oxides, (b) an aluminum oxyhydrate doped with silicon dioxide, at least one oxide of a metal of the third to fifth subgroups, at least one oxide of a lanthanide including lanthanum or a mixture of one or more of these oxides, (c) silicon dioxide or high-silicon zeolite, or (d) titanium dioxide doped with at least one oxide of a metal from the third to sixth subgroups or with an oxide of a lanthanide including lanthanum, (e) a mixture of zirconium dioxide with at least one oxide of a metal from the third to fifth subgroups, at least one oxide of a lanthanide including lanthanum, or a mixture of one or more of these oxides.
摘要:
The invention proposes a device (1) for the treatment of combustion products which are formed during an engine combustion and flow through the device (1), having a particulate filter for particulate retention and having catalytically active sections, wherein, in the throughflow direction, the combustion products pass an inflow side (6) and subsequently an outflow side (11). In order to increase the effectiveness and the service life of the treatment device (1), the catalytically active sections comprise a first layer on the inflow side (6) and a second layer on the outflow side (11), wherein the catalytic actions of the layers differ from one another.
摘要:
The invention relates to a device (18) for introducing a reductant into an exhaust gas system of an internal combustion engine comprises a reductant connection (42) and an injection valve (20) for the reductant. According to the invention, the device (18) has an air connection (42), a mixing chamber (78), which is connected both to the outlet (46) of the injection valve (20) and to the air connection (54), and a discharge nozzle (72), which has a fluid connection to the mixing chamber (78) for discharging the reductant/air mixture.
摘要:
The invention relates to a filter for removing particles from a gas stream, in particular soot particles from an exhaust gas stream of an internal combustion engine, having a filter body comprising a ceramic filter substrate, with the filter substrate being coated with a porous covering layer and the porous covering layer containing at least one of the following materials: (a) at least one aluminium oxide selected from among alpha-, gamma-, delta- and theta-aluminium oxide, (b) aluminium oxide hydrate which is doped with silicon dioxide, at least one oxide of a metal of transition groups 3 to 5, at least one oxide of a lanthanide including lanthanum or a mixture of one or more of these oxides, (c) aluminosilicate, magnesium-aluminium silicate or aluminium titanate, (d) silicon dioxide or silicon-rich zeolite, (e) titanium dioxide which is doped with at least one oxide of a metal of transition groups 3 to 6 or an oxide of a lanthanide including lanthanum, (f) a mixture of zirconium dioxide with at least one oxide of a metal of transition groups 3 to 5, at least one oxide of a lanthanide including lanthanum or a mixture of one or more of these oxides or (g) a cerium oxide which is doped with at least one oxide of a metal of transition groups 3 to 6 or an oxide of a lanthanide including lanthanum. The porous covering layer additionally contains at least one catalytically active material.