摘要:
A heat exchanger unit is disclosed, the heat exchanger unit including a first tube element unit, a second tube element unit, and an engine machine apparatus having an expansion step unit and a compression step unit. Each of the tube element units is adapted to condition a fluid flowing therethrough. Desirably, the fluid is compressed in the compression step unit and expanded in the expansion step unit in such a manner that technical operation is transferred from the expansion step unit to the compression step unit so that an inner recovery of energy is made possible.
摘要:
In a heat exchanger unit for conditioning a first fluid, particularly a refrigerant in an air conditioning system, including a heat exchanger, the heat exchanger includes first and second tube element units for heat exchange between a first fluid flowing through the tube elements and a second fluid flowing over the tube elements, wherein the first fluid is supplied first to the first tube element unit so as to flow upwardly therethrough and via an intermediate outlet connector to a compressor stage from where it is transferred to the top of the second tube element unit which is disposed above the first tube element unit and flows downwardly through the second tube element unit to an expansion stage wherein the energy released during expansion in the expansion stage is utilized for the compression of the first fluid in the compressor stage.
摘要:
A heat exchanger unit is disclosed, the heat exchanger unit including a first tube element unit, a second tube element unit, and an engine machine apparatus having an expansion step unit and a compression step unit. Each of the tube element units is adapted to condition a fluid flowing therethrough. Desirably, the fluid is compressed in the compression step unit and expanded in the expansion step unit in such a manner that technical operation is transferred from the expansion step unit to the compression step unit so that an inner recovery of energy is made possible.
摘要:
In a heat exchanger unit for conditioning a first fluid, particularly a refrigerant in an air conditioning system, including a heat exchanger, the heat exchanger comprises first and second tube element units for heat exchange between a first fluid flowing through the tube elements and a second fluid flowing over the tube elements, wherein the first fluid is supplied first to the first tube element unit so as to flow upwardly therethrough and via an intermediate outlet connector to a compressor stage from where it is transferred to the top of the second tube element unit which is disposed above the first tube element unit and flows downwardly through the second tube element unit to an expansion stage wherein the energy released during expansion in the expansion stage is utilized for the compression of the first fluid in the compressor stage.
摘要:
The invention relates to a device for the variable actuation of gas exchange valves for internal combustion engines, wherein at least one cam (2) pertaining to a camshaft (1) mounted in a housing rotates according to the engine speed. The cam (2) first drives an intermediate member (4) which performs a clear oscillating, rotary movement and has a rotational axis (7) that can be displaced in the housing parallel to itself along a curve of displacement (8), said intermediate member comprising a control cam (5) having a lifting region (5b) and actuating an output member (11) that, in turn, actuates at least one valve (13). The aim of the invention is to enable one such device to be reliably controlled. To this end, the control cam (5) has a catch region (5a), and the intermediate member (4) is mounted on a bearing having an axis which corresponds to the rotational axis (7), said bearing being arranged in such a way that it is guided in a forced manner and can be displaced parallel to the curve of displacement (8, 28, 35), by means of an articulation (16, 24, 26) connected to the cylinder head or the housing or by a slide (34) that is guided in the housing in a positively locking manner. The invention also relates to a method for operating an internal combustion engine comprising a plurality of cylinders using at least one of the inventive devices.
摘要:
A disc clutch wherein at least one first clutch disc, having internal teeth mating with the external splines of a first rotary hub, frictionally engages at least one second clutch disc, having external teeth mating with the internal splines of a second rotary hub coaxial with the first hub, when the clutch is engaged. Engagement of the clutch takes place in response to actuation of a cylinder-piston unit having a reciprocable piton which can directly or indirectly bear upon one of the two outer discs of the package including the first and second discs. The splines of the hubs and/or the teeth of the clutch discs are capable of undergoing deformation, particularly elastic deformation, to thus facilitate a more accurate selection of the magnitude of torque to be transmitted between the hubs by way of the frictionally engaged clutch discs.
摘要:
The seal or pattern between two machine parts has on one of the sealing gap-forming, facing surfaces (5) a plastic layer (1) with closely juxtaposed depressions (8) which have the form of partly cut off voids of an expanded plastic structure. They are formed by the removal of a plastic layer (3) expanded on the machine part, the layer thickness being so uniformly reduced that the voids (4) of the bottom void layer (4) adjacent to the base surface (5) of the machine part are open. This avoids the insulating action of the closed voids of an expanded plastic layer and the latter has a very limited weight, which avoids any risk of the layer being detached or separated due to centrifugal forces. Moreover, in simple manner, a honeycomb-like, open surface structure is obtained, so that there is a labyrinth effect in the sealing gap. In order to obtain minimum, sealing gaps by running in the open, honeycomb-like surface structure is particularly advantageous, because the solely linear contact which occurs ensures a rapid running in of the mating surface, which can be abrasively prepared. The seal or packing is particularly suitable for very rapidly rotating machine parts.
摘要:
The invention is characterized in that the gas exchange valves of a cylinder are displaced in a displacement unit (15, 34) jointly and independently of the displacement of the displacement devices of the other cylinders. Every displacement unit (15, 34) is associated with separate actuators for actuating the same. Angle of rotation sensors (42, 43) are provided to detect the angle or rotation signals of the crankshaft and the camshaft or any other shaft rotating at half the crankshaft speed. These angle of rotation signals are used to derive the common idle phase of all valves of a cylinder to be jointly adjusted, a control unit (44) effecting the displacement of every displacement unit (15, 34) during said common idle phase.
摘要:
The reciprocating piston engine has an annular swivel disk (6), driven by the engine shaft (5) and whose inclination with respect to the latter is adjustable, for driving circumferentially juxtaposed reciprocating pistons (2). For this purpose it is connected in articulated manner both to a sliding sleeve (21) axially guided on the engine shaft (5) and to a driver (13), which transmits the driving force and which is spaced from the engine shaft (5). As a result of the annular shape of the swivel disk, which is advantageous both dynamically and from the manufacturing standpoint a space-saving, articulated engagement of the driver (13) in a radial bore (16) of the swivel disk (6) is rendered possible.
摘要:
A CO2 compressor for an air conditioner of a motor vehicle is suggested having a sealing device, assigned to the driveshaft of the CO2 compressor, which is implemented as a sliding ring. The CO2 compressor features a lubrication device, in which the sealing device is supplied a lubricant flow effected by centrifugal forces.
摘要翻译:建议用于机动车辆空调的CO 2压缩机具有密封装置,分配给CO 2压缩机的驱动轴,该压缩机被实施为滑环 。 CO 2压缩机具有润滑装置,其中密封装置被供应由离心力影响的润滑剂流。