摘要:
A honeycomb body (1) having at least one housing (2) and metal foils (3) which form a duct structure (4), wherein the duct structure (4) is fastened to the housing (2) by means of a large number of linear soldered joins (5). The invention also proposes a production process which is used to provide these linear soldered joins (5) between the duct structure (4) and the housing (2).
摘要:
The invention relates to a cellular body (1) having a plurality of channels (2) and formed from at least one at least partially structured metal sheet (3). Said metal sheet (3) has a direction of progression (4) and comprises upper connecting points (6) and lower connecting points (37) with itself or with at least one additional smooth metal sheet (5) or structured metal sheet (3). According to the invention, at least upper connecting points (6) or lower connecting points (37) form a curved connection line (33) and expansion joints (38) are formed between the respective connection points of the curved connection line (33).
摘要:
Disclosed are an evaporator (1) for ammonia to be used in mobile emission systems. Said evaporator (1) comprises a base (2) encompassing at least one supply pipe (3) and at least one discharge pipe (4). At least one heating element (5) and at least one duct (6) for connecting the supply pipe (3) to the discharge pipe (4) are arranged within the base (2). The at least one heating element (5) is in heat-conducting contact with an evaporation section (7) of the at least one duct (6), while the at least one duct (6) has a serpentine shape (8) in said evaporation section (7).
摘要:
The invention relates to a device (1) for providing a gaseous mixture comprising at least one of the following substances: a) at least one reducing agent and b) at least one reducing agent precursor. A reservoir (20) for the aqueous solution (45) comprises at least one reducing agent precursor that can be fluidically connected to an evaporator chamber (24), and means for dosing the aqueous solution (45) in the evaporator chamber (24). Means (27, 63) for heating the evaporator chamber (24), which can heat the evaporator chamber (24) to a temperature higher than or equal to a critical temperature, in which the aqueous solution (45) is at least partially evaporated, are provided. The device according to the invention (1) and the inventive method enable a reducing agent to be provided for selective catalytic reduction of nitrogen oxides in the waste gas of an internal combustion engine. In a preferred embodiment, the evaporator unit (12) is configured as an evaporator chamber (24) and the hydrolysis catalyst (17) is arranged outside the waste gas system. As a result, the size of the hydrolysis catalyst (17) is reduced, allowing a compact design.
摘要:
The invention relates to a device (1) for processing waste gas (2) of an internal combustion engine, comprising at least one supply line (4) for supplying an aqueous solution, a hydrolysis catalyst (5) that is connected to the supply line (4), and a SCR-catalyst (7). The SCR catalyst (7) can be cross-flown by waste gas (2). The invention is characterised in that at least one rod-shaped heating element (9), which can heat at least one of the following components, is provided: a) at least parts of the supply line (4) and b) the hydrolysis catalyst. The inventive device (1) enables a supply line (4) that is heated by the rod-shaped element (9) to be formed in a compact manner, as well as a corresponding hydrolysis catalyst (5) which can evaporate an aqueous solution comprising urea, and subsequently can be hydrolysed to form a gas flow (22) containing ammonia. Said gas flow (22) is used as a reducing agent in the SCR process. The compact arrangement allows installation even with limited available space. Due to the fact that the hydrolysis catalyst (5) is not cross-flown by the waste gas, the volume of said hydrolysis catalyst (5) can be decisively reduced, thereby a clearly smaller mass flow must be hydrolysed to gas.
摘要:
The invention relates to a method for producing a body (1) for exhaust treatment, said body comprising a plurality of metallic layers (2). According to the inventive method, the layers (2) are brought into contact with each other in an assembly region (3), and a join is made by means of a roller seam welding method in such a way that the layers (2) form channels (4) through which a gas flow can pass. The invention also relates to corresponding bodies (1) for exhaust treatment, that can especially be used as filters or catalyst carrier bodies in the car industry.
摘要:
The present invention relates to an electrical connection (1) for an electrical component (2) in an exhaust gas system (10) of an internal combustion engine (11), in particular an electrically heatable honeycomb body (12), wherein the exhaust gas system (10) has a metal jacket (3), through which an electrical conductor (4) is fed by means of a feed-through (5), the electrical conductor being electrically insulated by an insulating layer (6), and wherein the electrical conductor (4) has an outer connection section (7) having a circular cross-section, said connection section having a contact surface (8) for connecting to a connection piece (14) of a supply line (15). According to the invention, the feed-through (5) and/or the electrical conductor (4) in the area of the feed-through (5) is designed in such a way that the feed-through and/or the electrical conductor in the area of the feed-through can absorb torques acting on the connection section (7) and/or the internal or external thread (9) in the circumferential direction thereof of up to 3.6 Nm (newton meters) per cm 2 (centimeters squared) of contact surface (8), preferably up to 4.5 Nm/cm 2 , in particular up to 7 Nm/cm2. This is achieved in particular by means of suitable shaping of the electrical conductor (4) in the area of the feed-through (5), in particular by means of structures and/or changes to the cross-sectional form. Especially advantageous is a form-closed design of the electrical conductor (4) and the feed-through (5). In this way, damage even to sensitive electrical components (2) in the exhaust gas system (10) due to large externally applied torques can be avoided. In addition, damage is avoided during disassembly and maintenance.
摘要:
The present invention relates to a supporting pin (1) for supporting an electrically heatable honeycomb body (3) on a first honeycomb body (2), wherein the supporting pin (1) has a first end region (5), a second end region (6) and an intermediate region (7), wherein the supporting pin (1) has a core (8) made of electrically non-conductive ceramic material and a metallised surface (4) on at least one end region (5; 6) and an electrically non-conductive intermediate region (7) having a length of at least 3 mm (millimetres), preferably 5 to 15 mm. Supporting pins (1) according to the invention are particularly suitable for stabilising electrically heatable honeycomb bodies in exhaust gas treatment systems for internal combustion engines, particularly for motor vehicles. With the use of higher electrical voltages, such as 48 V, for electrically heatable honeycomb bodies, good electrical isolation is also assured in exhaust gas systems carrying soot particles with simultaneous safe support and suppression of vibrations.
摘要:
The present invention relates to an exhaust-gas treatment device (1) with a honeycomb element (2), through which an exhaust gas can flow, and which honeycomb element (2) is wound and/or stacked with at least partially structured sheet-metal layers (3, 17) in such a way that channels (7) are formed, through which an exhaust gas can flow in the axial direction (4) from an inlet side (5) to an outlet side (6). A first part (8) of the sheet-metal layers (3, 17) ends flush at a first end surface (9) which is assigned to the inlet side (5) and/or the outlet side (6), and a second part (10) of the sheet-metal layers ends at a second end surface (11) which is likewise assigned to the inlet side (5) and/or the outlet side (6). The second end surface (11) is at a spacing (12) from the first end surface (9), by a first length (13) in the axial direction (4) of the first part (8) of sheet-metal layers (3, 17) being greater than a second length (14) in the axial direction (4) of the second part (10) of sheet-metal layers (3, 17). As a result of the spacing (12) between the first end surface (9) and the second end surface (11), a receptacle (15) is formed, in which a heating element (16) is arranged. By way of the present invention, an electrically heatable exhaust-gas treatment device (1) can be produced in a simple way, into which a heating element (16) can be integrated during or after the production of the honeycomb element (2).