摘要:
The present invention relates to a process for the production of radiation-cured foams, characterized in that the radiation-cured foams are produced by 1) foaming of an aqueous composition A), 2) thermal drying of the foam produced from step 1), 3) curing of the foam by actinic radiation, the radiation-curable aqueous compositions A), the radiation-cured foams produced by the process according to the invention and the use of the radiation-cured foams for coating substrates.
摘要:
The present invention relates to a bipolar plate (1) for electrochemical systems which contains a first plate (2) with a first flowfield (2a) for media distribution as well as a second plate (3) with a second flowfield (3a) for media distribution. This first plate in the region of the first flow field at least in regions comprises a plane surface section (4) from which discrete projections (5) distanced to one another project arranged in a distributed manner. Furthermore a method for manufacturing this bipolar plate is suggested as well as an electrochemical system which contains this bipolar plate. According to the invention it is possible in an inexpensive manner to manufacture a bipolar plate which permits the construction of fuel cells functioning with a low peripheral consumption (pumps, compressors) and which are safer with regard to their operation.
摘要:
The present invention relates to an end plate for a fuel cell stack, containing at least one channel (7) for the supply and/or removal of at least one reactant and/or a reaction product and/or a coolant, wherein at least a part at least of one pump (8) for delivering the reactants and/or reaction products and/or coolant and which is arranged in the course of the respective channel (7) is integrated into the end plate. The invention further relates to a fuel cell stack which contains such an end-plate.
摘要:
A method of adjusting an operating temperature of a control device (2) of a motor vehicle automatic transmission. The transmission control has a hydraulic unit (3) and an electronic unit (4) with electronic modules. The control device (3)is situated in a transmission housing which is partially filled with transmission oil and at least partly surrounded by transmission oil. The control device (2) has a cooling device (5) by which at least part of the electronic unit (4) is cooled with the transmission oil. The transmission oil has a temperature &THgr;C which is lower than a prevailing transmission oil temperature &THgr;G. The electronic unit (4) is impinged upon with a defined volume flow of the transmission oil.
摘要:
The invention is based on an electronic-hydraulic control unit (1) for an automatic transmission of a motor vehicle wherein the control unit (1) has one hydraulic unit (2) with hydraulic valves (4), sensors (6, 7) and pressure regulators (5) and one electronic unit (3) with a microprocessor, memories, sensors and power regulators (9) which form a functional unit. To reduce the tolerances of the control unit, it is proposed that the pressure tolerances appearing in the operating range be detected by verifying characteristic lines and from the divergences relative to a set characteristic line, plotting and storing in a memory a corresponding characteristic line correction.
摘要:
The electrical plug-in connection for connecting one electronic module within an automatic transmission for motor vehicles with a feed line provided outside the housing have a plug which penetrates a bore with play in the housing. A matching plug in the shape of a bushing wherein plug and matching plug are provided with grooves or ribs to form a bayonet interlocking. In the space between the plug and the bore is provided a molded seal which, when the matching plug is slipped on, becomes deformed and hermetically seals the bore.
摘要:
A method is provided for operating an internal combustion engine that includes, but is not limited to ascertaining a possible instant of a stoppage of the internal combustion engine and injecting fuel to fill a cylinder of the internal combustion engine. The injection performed shortly before the instant of the stoppage of the internal combustion engine.
摘要:
The present invention relates to radiation-curable coating compositions based on tin-free aqueous polyurethane dispersions based on polyurethane acrylates (i), characterized in that the polyurethane acrylate (i) comprises as builder componentsA) one or more compounds with at least one group which is reactive towards isocyanate and at least one unsaturated group which can undergo free radical polymerization,B) one or more compounds which differ from A) and have at least one group which is reactive towards isocyanate,C) one or more compounds with at least one group which is reactive towards isocyanate and additionally at least one group having a hydrophilizing action,D) one or more organic polyisocyanates,which are reacted in the presence ofF) bismuth(III) salt(s) andG) an acid having a pKa of
摘要:
The present invention relates to a process for the preparation of low-viscosity, radiation-curable, aqueous dispersions based on polyurethane acrylates (UV-PUDs), wherein the UV-PUDs hydrophilised via hydroxy-functionalised carboxylic acids have a lower initial viscosity when a large part of the urethanisation, that is to say the reaction of the NCO-functionalised compounds with the OH-functionalised compounds, initially takes place in the absence of the acid-carrying compounds and the incorporation of the acid-carrying compounds via their hydroxyl function takes place as late as possible.
摘要:
The present invention relates to an end plate for a fuel cell stack, containing at least one channel (7) for the supply and/or removal of at least one reactant and/or a reaction product and/or a coolant, wherein at least a part at least of one pump (8) for delivering the reactants and/or reaction products and/or coolant and which is arranged in the course of the respective channel (7) is integrated into the end plate. The invention further relates to a fuel cell stack which contains such an end-plate.