Abstract: The present invention relates to arrangement for a plate heat exchanger for connection to a system, of which the plate heat exchanger is designed to form part. The plate heat exchanger is of conventional construction with plates (2) parallel to one another, which constitute a package (1) and between them define flow channels. The outermost plates (2a, 2b) of the package (1) are at each short end partially covered by plate elements (6a, 6b), which essentially lie within the width of the package (1), of which the plate element (6a) situated nearest the system has throughholes (7) for assembly elements, which can be inserted into the holes (7) from above, since he pates (2) are formed with recesses (8). At each short end there are also clamping elements which effectively act between the plate elements (6a, 6b) and are designed to produce a symmetrical clamping force and to hold the package (1) together.

Abstract: A cooling module (1) comprises a first heat exchanger (3), which has a first pair of parallel manifolds (10, 11), and a second heat exchanger (4), which is in back-to-front relationship with the first heat exchanger (3) and has a second pair of parallel manifolds (7, 8) perpendicular to the first pair of manifolds (10, 11). The first pair of manifolds (10, 11) is fastened to the second pair of manifolds (7, 8) at four corners (13, 14, 15, 16) by means of four fasteners, of which the first is a rigid fastener (19), the second (20) and third (22) are two-way fasteners, and the fourth (27) is a four-way fastener. The four-way fastener (27) is situated at the corner (16) diametrically opposed to the corner (13) with the rigid faster (19), and the two-way fasteners (20, 22) are situated at one of the remaining corners (14, 15) each.

Abstract: A method of manufacturing an elongate fluid conveying tube that includes starting from a blank of metal material, wherein the fluid conveying tube is adapted to be mounted in a vehicle cooler and comprises at least two internal elongate ducts. The method of manufacturing the tube includes forming a projecting surface structure on a portion of the surface of the blank. The method also includes defining a substantially flat web portion between two upright edge portions that are formed along two opposite edges of the blank. Additionally, the method involves forming the ducts such that the edge portions are situated perpendicular to the web portion and the outer faces of said edge portions are brought into abutment against each other and against the web portion for defining said ducts.

Abstract: A fluid conveying tube included in a vehicle cooler comprises on its inside first and second opposite longitudinal primary heat exchange surfaces, and flow-directing surface structures which are arranged on the primary surfaces. Each surface structure comprises a plurality of elongate directing elements projecting from the primary surfaces. The surface structures are alternatingly arranged on the first and second primary surfaces in such manner that directing elements, succeeding in the longitudinal direction of the primary surfaces, are alternatingly arranged on the first and second primary surfaces and are mutually inclined at a given angle (?). Each surface structure comprises a laterally extending row of mutually parallel directing elements. Thus an input fluid flow is divided into a number of parallel partial flows which follow a respective spiral-shaped flow path through the tube, whereby a high heat exchanging capacity is achieved.

Abstract: A manifold for a heat exchanger comprising a tank, a plurality of tubes arranged to receive fluid therein, a plurality of fins for interspacing the tubes, the fins extending along the length of the tubes to thereby define a core section, wherein the header section is formed with multi-point brazing interfaces for securing said header and said core section during a brazing process. One embodiment provides at least one doubled wall area in close proximity to the tube slot areas to form a structure of increased strength, permitting the material to be reduced in relative thickness. The manifold may be formed from flat sheet stock by extended side walls of the header portion joined by a separate cap to close a top portion of the manifold assembly for the purpose of collecting fluid to and from the tubes and said at least one inlet and outlet.

Abstract: A manifold for a heat exchanger comprising a tank, a plurality of tubes arranged to receive fluid therein, a plurality of fins for interspacing the tubes, the fins extending along the length of the tubes to thereby define a core section, wherein the header section is formed with multi-point brazing interfaces for securing said header and said core section during a brazing process. One embodiment provides at least one doubled wall area in close proximity to the tube slot areas to form a structure of increased strength, permitting the material to be reduced in relative thickness. The manifold may be formed from flat sheet stock by extended side walls of the header portion joined by a separate cap to close a top portion of the manifold assembly for the purpose of collecting fluid to and from the tubes and said at least one inlet and outlet.

Abstract: An improved heat exchanger for an automotive vehicle, comprising at least one end tank; and at least two heat exchangers including a plurality of spaced apart extruded metal tubes with fins between the spaced tubes. The heat exchangers are disposed so that their respective tubes and fins are generally co-planar with each other and are connected to the end tank. In preferred embodiments, the heat exchanger may include a bypass element.

Abstract: A power take off assembly for a heat exchanger for a vehicle. The assembly includes a rectangular frame having passages all the vertical sides to marry with core tubes from the heat exchanger, a face plate with a hole to position the power take off sleeve, a back plate with a similar hole, and a sleeve to allow the power take off shaft to pass though the assembly when installed in a heat exchanger for an automobile/truck. The assembly is pieced together and tabs located on the perimeter of the frame lock the front and back plates into place, the sleeve is inserted in the holes, and the entire assembly is brazed in a one shot process.

Abstract: A fin louver design using breaking and reversal louvers whose lengths are substantially longer than the half-length of the main louver but at slightly lower angles to the fin face, in order to increase the heat transfer while reducing or minimizing the airside air pressure drop. The reversal louvers will not dramatically change the airflow direction but rather permit air to follow the louver direction, thus preventing any dead area where the air speed is approximately zero in the central part between the two reversal louvers. Contact is provided between fresh moving air and the central part between the two reversal louvers.

Abstract: A fluid conveying tube for a vehicle cooler comprises at least two longitudinal ducts, each comprising two opposite, longitudinal primary heat exchange surfaces. At least one primary surface in each duct of the tube has a projecting surface structure. In a method of manufacturing such a tube, starting from a blank, use is made of a device, which has a feeder for feeding the blank through the device and a surface forming station for forming the surface structure on a portion of the blank surface. Furthermore, the device comprises an edge forming station for forming two opposite edges of the blank into two upright edge portions, which between themselves define an at least partly essentially flat web portion. In addition, the device comprises a duct forming station for making the edge portions abut against each other and against the web portion with a view to defining said ducts.

Abstract: A variable speed drive assembly for driving an auxiliary member in an internal combustion engine. The auxiliary member may be a fan connected to a pulley is driven by a drive pulley connected to a crankshaft of the internal combustion engine via a V-belt. At least one of the pulleys is an adjustable drive ratio pulley. An actuator is operatively connected to the drive assembly to controllable change the drive ratio of the pulley. By controlling the drive ratio of the pulley, the speed of the fan can be selectively controlled. The adjustable drive ratio pulley may have an inner idler freely rotatable mounted therein. The actuator may cause the V-belt to engage the inner idler to substantially disconnect a rotatable connection between the fan and the crankshaft thus allowing the fan to windmill.

Abstract: A heat exchanger for vehicles comprises firstly a heat-exchanger assembly consisting of flat liquid-conveying tubes and surface-enlarging means, secondly an inlet tank, and thirdly an outlet tank. The inlet tank and the outlet tank have a connection plate with a number of connection holes for the tubes. At each hole, the plate has a projecting connecting sleeve element. Each tube has at its ends a widened main portion which is accommodated on said connecting sleeve element. A rounded transitional area is formed between the connection plate and each connecting sleeve element, and the main portion is inserted in the conecting sleeve element and is applied with its outside against the inside of the connecting sleeve element. Each tube has at its ends an end portion which is widened in relation to the main portion, merges with the main portion and is applied against the transitional area.

Abstract: Arrangement in a heat exchanger, for example a retarder oil cooler, constructed from plates with alternating cooling water and oil ducts between them. The plates surrounding the cooling water ducts are provided with converging inward bends in the form of nipples, which are intended to keep the said plates at a distance from one another. Between the plates surrounding the oil ducts there is a so-called turbulator, which on the one hand serves to increase the surface and on the other is designed to make the flow turbulent. The arrangement is characterized in that the oil ducts situated outermost in the cooler each comprise elements designed to reduce the flow through these compared to the flow in other oil ducts. An improved thermal equilibrium is thereby achieved in the outermost ducts, which gives a reduced risk of thermal fatigue, especially in the inward bends converging in the cooling water ducts in the form of nipples. The service life of the heat exchanger is thereby prolonged.

Abstract: The invention concerns an arrangement comprising an inlet manifold for an internal combustion engine. The arrangement comprises an element formed with flow ducts. It is formed with two coupling device halves which communicate with the ducts. These coupling device halves can be connected to two corresponding coupling device halves disposed on the inlet manifold. One of these halves communicates with the member for supplying air of combustion for the engine and with an engine coolant discharge pipe. The other communicates with the inlet manifold and with a feed pipe for said coolant.

Abstract: A fan module with an axial flow fan and a shroud member. The axial flow fan has a hub and a plurality of fan blades, each blade extending radially from the hub. At the tips of the blades are air guide members secured to respective fan blades and concentric with the hub. Each air guide member has an axially-extending arcuate portion, and a respective lip portion extending radially outwardly from each said arcuate portion. The axially-extending portion has an axial length substantially equal to or less than the axial length of said hub. The shroud member has a surface cooperating with the air guide members in an arrangement to reduce tip vortices.

Abstract: An oil cooler for motor vehicles, having an outer tube and an inner tube which is disposed within the outer tube and whose outer surface, together with the inner surface of the outer tube, forms an annular channel, sealed in both ends, for feeding oil to be cooled, from an inlet at first ends of the tubes to an outlet at second ends of the tubes, a means provided in the annular channel for ensuring heat transfer from the passing oil to the surrounding tube walls, and a turbulence-generating means provided on the outer surface of the outer tube for a coolant, in which the oil cooler is submerged, the turbulence-generating means consisting of cup-shaped dimples or bump-like projections formed on the outer surface of the outer tube.

Abstract: The invention relates to a heat exchanger tank to be mounted in a heat exchanger, preferably an oil cooler. The tank has an elongate casing (1) with two opposite end openings (11, 11') and a side opening which extends from end opening to end opening. The tank also has two end pieces (6, 6') which sealingly connect to each end opening (11, 11') respectively, and a connecting plate (2) for connection to a heat exchanger assembly included in the heat exchanger. The connecting plate (2) sealingly connects to the boundary edges of the side opening. At each end opening (11, 11') the casing (1) is provided with at least one receiving means (10). Each end piece (6, 6') has at least one recess (14) aligned with the receiving means (10) of the casing (1). A fixing means (17) is inserted through the recess (14) and is fastened in the receiving means (10) of the casing (1). At least one engaging means is arranged at the respective end pieces (6, 6') engaging an end section of the connecting plate (2).

Abstract: A novel tube plug which may be used to plug selected tubes in a heat exchanger has a cap portion for substantially closing a heat exchanger tube and a tube engaging portion depending from the cap portion, for insertion into the tube to retain the tube plug. By applying solder to the tube plug, the tube is sealed off, without providing a large solder mass which could cause damage due to thermal stresses.

Abstract: In a heat exchanger tank, a connecting plate along its longitudinal side edges is provided with flange sections which extend substantially perpendicularly from the connecting plate, the flange sections of the connecting plate each have at least one engagement surface, the legs of a casing at their free end edges are provided with engagement means extending in the longitudinal direction of the casing, the engagement means of the casing lockingly engage the engagement surface of the respective flange section, and sealing connections of the plate with the legs are achieved by brazing.

Abstract: The described apparatus produces an end closure for a pipe that forms part of a heat exchanger. The apparatus includes a frame, with first and second sides. A tubular through-channel has an opening on the first said that is delimited by a side surface extending around the opening. It is possible for a pipe which is intended to be closed, to be introduced into the tubular channel from the second side. A press tool executes a reciprocal motion through the channel. The press tool presses an end closure blank into the channel opening. A method for producing an end closure for a heat exchanger pipe also is described. The method comprises the measures of introducing a pipe into a channel in a frame. An end closure blank is pressed into the through-channel and on into the pipe.