摘要:
The invention relates to a device for exhaust-gas recirculation for an internal combustion engine, comprising a flange (1) for attaching to a cylinder head of the internal combustion engine, wherein combustion air (L) flows from a passage region (5) of the flange (1) directly into at least one intake duct of a cylinder, and wherein an inlet for an inflow of recirculated exhaust gas into the combustion air (L) is provided, wherein the inlet for the inflow of the recirculated exhaust gas is arranged on the flange (1).
摘要:
The invention relates to an exhaust gas cooler (1) for an internal combustion engine, in particular in a motor vehicle, comprising a tube bundle (3) through which exhaust gas (2) or coolant flows. At least two inserts (5) for increasing the heat transfer are provided in at least one of the tubes (4), said inserts being arranged so as to be axially offset with respect to each other and rotated with respect to each other. In particular, a particle deposit that reduces the efficiency of the exhaust gas cooler (1) can thereby be prevented.
摘要:
Die Erfindung betrifft einen Strömungskanal (41, 41', 61, 61', 71, 71', 81, 81', 91, 91') für einen Wärmetauscher (30, 40) zum Wärmetausch zwischen einem ersten Fluid (31) und einem zweiten Fluid (33) aufweisend: einen Kanalmantel (63, 63', 73, 73', 83, 83', 93, 93') mit einem von einer Kanalmantelinnenseite (65) umgebenden Innenraum (67); eine Anzahl von im Innenraum (67) an der Kanalmantelinnenseite (65) angeordneten Stegen (69, 79, 79', 89, 89', 99), welcher Strömungskanal 1 zur Führung des ersten Fluids (31) im Innenraum (67) ausgelegten durchströmbaren Querschnitt quer zu einer Strömungskanalachse (94) aufweist. Um einen verbesserten Wärmeübergang bei gleichzeitig noch akzeptablem Druckverlust und reduziertem Verblockungsrisiko zu gewährleisten ist ein als das Vierfache des Verhältnisses aus der Fläche des durchströmbaren Querschnitts zu einem durch das Fluid benetzbaren Umfang definierter hydraulischer Durchmesser in einem Bereich zwischen 1,5 mm und 6 mm vorgesehen. Die Erfindung führt auf einen Wärmetauscher (30, 40), der einen Block mit einer Anzahl von Strömungskanälen (41, 41', 61, 61', 71, 71', 81, 81', 91, 91') dieser Art aufweist, die von dem ersten Fluid (31) durchströmbar sind und die mit einem Fluidanschluss strömungsverbunden sind. Die Erfindung führt auf ein Ladeluftsystem, ein Abgasrückführsystem und eine Verwendung des Wärmetauschers.
摘要:
The invention relates to a flow channel (41, 41 ', 61, 61 ', 71, 71 ', 81, 81' 91, 91 ') for a hear exchanger (30, 40) for exchanging heat between a first fluid (31 ) and a second fluid (33). Said flow channel comprises a channel cover (63, 63', 73, 73', 83, 83', 93, 93') provided with a space (67) surrounded by the inner side of the channel cover (65); a plurality of partitions (69, 79, 79', 89, 89', 99) that are arranged on the inner side of the channel cover (65) in said space (67), said flow channel (1) comprising, perpendicular to a flow channel axis (94), a cross-section that can be traversed and embodied for guiding the first fluid (31 ) in the inner chamber (67). The aim of the invention is ensure an improved transfer of heat with a more acceptable drop of pressure and a reduced risk of blocking. As a result, a hydraulic diameter in the region of between 1,5 mm and 6 mm, defined as the quadruple of the ratio between the surface of the cross-section that is traversed and the perimeter that can be moistened by the fluid. The invention also relates to a heat exchanger (30, 40), comprising a block having a plurality of flow channels (41, 41 ', 61, 61 ', 71, 71 ', 81, 81 ', 91, 91 ') of said type, through which the first fluid (31) flows and fluidically connected by a fluid connection. The invention further relates to a charge-air system, an exhaust gas recycling system and to the use of the heat exchanger.
摘要:
The invention relates to a heat exchanger (10, 20), particularly an exhaust gas heat exchanger, for transferring heat in two stages between a first fluid (1) and a second (2) and third fluid (3) that have different temperatures. Said heat exchanger (10, 20) comprises a block (5, 55) for separately conducting the first (1) as well as the second (2) and third fluid (3) in a heat transferring manner. The block (5, 55) encompasses a number of ducts (7A, 7B, 47) through which the first fluid (1) can flow, a first chamber (9A, 9B) of a high-temperature part (11, 51), through which the second fluid (2) can flow and which accommodates the ducts (7A, 7B, 47), a second chamber (9A, 9B) of a low-temperature part (13, 53), through which the third fluid (3) flows and which accommodates the ducts (7A, 7B, 47), and a housing (15, 45, 45A, 45B) in which the first (9A, 49A) and second chamber (9B, 49B) as well as the ducts (7A, 7B, 47) are arranged. The aim of the invention is to produce such a two-stage heat exchanger at a low cost and keep the leakage between the high-temperature part (11, 51) and the low-temperature part (13, 53) low. Said aim is achieved by separating the first chamber (9A, 49A) and the second chamber (9B, 49B) from one another by means of a separation area (17, 57) that is mounted in a groove (65).