摘要:
A hollow shaft composed of individual tube portions and provided with cams and end pieces, the individual tube portions preferably being interconnected by plastic expansion of the inner elements and elastic expansion of the outer elements. It is also possible to achieve a connection by shrinking the outer elements onto the inner ones by soldering or welding. Sleeves interconnecting the drive elements are designed to be integral with them and form part of the hollow shaft so that considerable weight savings are achieved by avoiding doubled regions where parts are slid onto each other. The design is particularly suitable for connecting parts with distinctly different elastic properties such as steel tubes and malleable cast iron drive elements.
摘要:
Method of fastening drive elements on a hollow shaft, which comprises:pushing n drive elements with a thickness a over a hollow shaft, retaining the drive elements at mutual spacings b and in respective desired azimuthal positions by means of holding devices;providing active sections of a material with a given limit of elasticity, a length c, mutual spacings d and being bounded by sealing lips on a hydraulic expanding device so that n(a+b)=n(c+d), pushing the hydraulic expanding device into the hollow shaft; andapplying a pressure through the hollow shaft to the active sections stressing the material of the active sections radially beyond the given limit of elasticity.
摘要:
A honeycomb body includes at least one housing and a honeycomb structure with a plurality of channels. The honeycomb structure is formed from at least one at least partially structured metallic layer which forms connecting points fixing the honeycomb structure. A cross section of the honeycomb structure has radial zones with differing densities of the connecting points. In at least one zone, at least 1% and at most 20% of inner contact points in the cross section also form a connecting point. An exhaust-gas purification unit and a motor vehicle are also provided.
摘要:
A honeycomb body includes at least a housing and a honeycomb structure having a plurality of channels. The honeycomb structure is formed of at least one at least partially structured metallic layer that forms connecting points fixing the honeycomb structure. At most 20% of inner contact points in a cross section of the honeycomb structure form a connection point, and the connection points are disposed at a distance from each other in such a way that respective connection-free regions of the same size surround each of the connection points. An exhaust-gas purification unit and a motor vehicle are also provided.
摘要:
A honeycomb body includes at least a housing and a honeycomb structure with a multiplicity of channels. The honeycomb structure includes at least one at least partially structured metallic layer forming connecting points which fix the honeycomb structure. A cross section of the honeycomb structure has radial zones with connecting points. At least 1% and at most 20% of inner contact points of the at least one at least partially structured metallic layer in at least one of the zones forms a connecting point in the cross section. The channels have a different channel cross section in at least two of the radial zones. A motor vehicle having the honeycomb body is also provided.
摘要:
A honeycomb body includes at least one housing and metal foils forming a channel structure. The channel structure is fastened to the housing by a multiplicity of linear brazed connections. A production method for providing the linear brazed connections between the channel structure and the housing and an exhaust gas treatment component having the honeycomb body in an exhaust system of a motor vehicle, are also provided.
摘要:
A metal foil has a material thickness in a range of from 0.15 mm to 0.02 mm and a structure with elevations and depressions which extend over a length of the metal foil and are disposed adjacent one another. At least some of the elevations or depressions have at least one first indentation and at least one second indentation adjacent the at least one first indentation. The at least one second indentation is at a different distance from the corresponding elevation or depression than the first indentation. An assembly having filter material, a honeycomb body and an exhaust gas treatment device for mobile internal combustion engines, are also provided.
摘要:
An assembly includes a honeycomb body secured by an inner casing tube in a housing, in particular a housing of an exhaust system of an internal combustion engine. The inner casing tube has an overall length which is bounded axially by two edges and is substantially smaller than the axial length of the honeycomb body. The inner casing tube is also disposed in an approximately axially central position around the honeycomb body and is connected, in particular brazed, thereto in at least one axial connection region. The inner casing tube has a region within the axial connection region in which it is connected to the honeycomb body on the inside or attached directly adjacent the latter on the outside and is connected to the housing. Regions of the inner casing tube which are not connected to the housing but are connected to the honeycomb body toward the inside are constructed as radially elastic spring elements. In this way, a resilient attachment, which adapts to deformations of the honeycomb body, is produced without tearing. That is advantageous in particular in the case of honeycomb bodies made of very thin sheet-metal layers, in particular thinner than 0.03 mm.
摘要:
A catalyst carrier body, which is suitable for use in an exhaust system close to an internal combustion engine, has a multiplicity of passages through which a gas stream can flow and which extend next to one another between an inlet side and an outlet side. In order to allow efficient and permanent installation of an exhaust-gas treatment device, which can be subjected to high thermal and dynamic loads, the catalyst carrier body has at least one metallic sheet, which at a temperature of 900° C. at least has a proof stress Rp0.2 of 50 N/mm2. A catalytic converter, which is likewise suitable for this purpose, a corresponding exhaust system and a corresponding vehicle, are also provided.
摘要翻译:适用于靠近内燃机的排气系统中的催化剂载体主体具有多个通道,气流可以通过该通道在入口侧和出口侧之间相互延伸。 为了能够有效且永久地安装可承受高热负荷和动态载荷的废气处理装置,催化剂载体主体具有至少一种金属片,其在900℃的温度下至少具有 50 N / mm 2的证明应力R< p0.2< 2>。 也提供了同样适用于此目的的催化转化器,相应的排气系统和相应的车辆。
摘要:
A system and a method are provided for determining a pollutant concentration of an exhaust gas at a first position of an exhaust-gas system of an internal combustion engine. A sensor for determining the pollutant concentration is placed at a second position, downstream of the first position, in the exhaust-gas system. The sensor records a measured value, which is then transmitted to a time function element taking into account the time delay between recording a measured value at the first and second positions and transmitting the measured value, temporally correlated with other undelayed measured values, to a diagnosis unit. Sensitive gas sensors can thus be placed at cooler positions of the exhaust-gas system that are less exposed to vibration and can nevertheless determine the pollutant concentration at another position.