摘要:
A device for electrically connecting a sensor element, which is accommodated in an engine add-on component, to evaluation electronics. The engine add-on component and the evaluation electronics are electrically connected to one another via contacting lines. The evaluation electronics is accommodated in a swiveling part of a hybrid holder which is movable relative to a part of the hybrid holder which is attached to the engine add-on component.
摘要:
A pressure-measuring device for recording a pressure in a combustion chamber of an internal combustion engine, having a force transmission body, situated in a housing, which is exposed to the combustion chamber and which transmits the combustion chamber pressure to a pressure-measuring unit at least indirectly by an axial motion, and having a flexible diaphragm, which is situated between the force transmission body and the housing. The flexible diaphragm is configured to be resilient to implement the axial motion of the force transmission body within the housing. A flexible additional diaphragm is connected ahead of the flexible diaphragm on the combustion chamber side, which seals the flexible diaphragm from the combustion chamber.
摘要:
A method of testing light metal parts, in particular aluminum components, which have been coated by anodizing, in particular by TSA anodizing, to determine whether they have been coated is described. According to the invention, the surface resistance of the surface of the component is measured and the surface coating of the component is classed as good when the surface resistance is higher than a prescribed high resistance value.
摘要:
A device for checking the coating of anodized light-metal parts (e.g. Aluminum), in particular by TSA anodization, is described. The device has two contact electrodes on respective resilient probes, placed onto the surface of the component to be tested under a predefined contact pressure; an enabling device coupled to the probes that generates an enable signal when the predefined contact pressure is reached; and a conductivity measuring device coupled to the contact electrodes that measures the conductivity of the surface of the component under test.The conductivity measuring device is coupled to the enabling device to detect the enable signal. When the enable signal is detected, the conductivity measuring device measures the surface conductivity of the component under test between the contact electrodes and generates an output signal indicating the measured conductivity. The device distinguishes between a measured low conductivity value, signifying a correct coating, and a measured high conductivity value, signifying a lack of the coating.
摘要:
The invention relates to a pressure sensor (1), comprising a housing (2), a housing element (3) which may be exposed to a pressure chamber (10), mounted on the housing (2) by means of a metallic membrane (5) and a measuring cell (4) which can indirectly measure a pressure acting on the housing element (3) and transmitted to the measuring cell (4) as a force resulting therefrom. According to the invention, said pressure sensor (1) comprises a housing element (3) embodied as a pin and projects out of the housing (2). The advantage of such an arrangement is only a small drilling to a pressure chamber (10) need be provided, in order to carry out a pressure measurement. The pin (3) need only be so long that the front end thereof, in the assembled state, approximately reaches the wall (11) of the pressure chamber (10).
摘要:
A sensor made of a single-crystal, piezoelectric material for measuring the pressure in a combustion chamber of an internal combustion engine, having a pressure transmission pin, a displaceably mounted heating pin protruding into the combustion chamber being provided as the pressure transmission pin, and the sensor being friction-locked with the heating pin. The sensor is preferably situated between the heating pin and a rigid thrust bearing. The single-crystal piezoelectric material of the sensor is preferably made of lithium niobate (LiNbO3). A particularly high sensitivity of the sensor is achieved by the use of a Z-cut or Y-cut piezoelectric material.
摘要:
The invention relates to a pressure sensor (1), comprising a housing (2), a housing element (3) which may be exposed to a pressure chamber (10), mounted on the housing (2) by means of a metallic membrane (5) and a measuring cell (4) which can indirectly measure a pressure acting on the housing element (3) and transmitted to the measuring cell (4) as a force resulting therefrom. According to the invention, said pressure sensor (1) comprises a housing element (3) embodied as a pin and projects out of the housing (2). The advantage of such an arrangement is only a small drilling to a pressure chamber (10) need be provided, in order to carry out a pressure measurement. The pin (3) need only be so long that the front end thereof, in the assembled state, approximately reaches the wall (11) of the pressure chamber (10).
摘要:
A device for checking the coating of light-metal parts, in particular aluminum components, which have been coated by anodization, in particular by TSA anodization, is described. The device has two contact electrodes, which are arranged on respective resilient probes and are intended to be placed onto the surface of the component to be tested under a predefined contact pressure, as well as an enabling device, which is coupled to the probes and generates an enable signal when the predefined contact pressure is reached, and a conductivity measuring device which is coupled to the contact electrodes in order to measure the conductivity of the surface of the component to be tested, is coupled to the enabling device in order to pick up the enable signal, measures the conductivity of the surface of the component to be tested between the contact electrodes and, when the enable signal is present, generates an output signal which indicates the measured conductivity and distinguishes at least between a measured low conductivity value, which signifies a correct coating, and a measured high conductivity value, which signifies a lack of the coating.
摘要:
A method of testing light metal parts, in particular aluminum components, which have been coated by anodising, in particular by TSA anodising, to determine whether they have been coated is described. According to the invention, the surface resistance of the surface of the component is measured and the surface coating of the component is classed as good when the surface resistance is higher than a prescribed high resistance value.
摘要:
In a group of rolls for a calender for processing material webs, comprising at least two rolls each having a roll body made of a cast or forged iron material, at least one of the roll bodies consists of chilled cast iron or shell-chilled cast iron. One or more rolls may have a cover of a resilient material, such as a polymeric plastic. Although it is possible for the outer diameters of the rolls to differ, the sag of the rolls when they are supported only in their rolling-contact bearings is substantially equal. In order to produce appropriate rolls, following the essential machining steps of the roll bodies, that is to say, for example, following casting, following preliminary turning, following preliminary boring and, if appropriate, following the introduction of peripheral bores, the actual mean modulus of elasticity of the entire roll body is measured and, as a function of this, in particular the inner diameters of the central bores are produced. In addition, methods for influencing the sag of the rolls in a deliberate way, by selecting appropriate materials, the relationships of material structures in the roll body or by means of the deliberate introduction of ballast into the central bore or else into separate peripheral bores in the roll bodies, are described.