摘要:
An exhaust module (1) for a turbocharged (17) reciprocating engine (13), in which the cylinders (14) are arranged in two banks (15, 16). The exhaust module (1) comprises a first exhaust manifold (2) for receiving exhaust gas from cylinders of a first cylinder bank (15), said first exhaust manifold (2) having a first end (4) and a second end (5), and a second exhaust manifold (3) for receiving exhaust gas from cylinders of a second cylinder bank (16), said second exhaust manifold (3) having a fist end (6) and a second end (7). The exhaust module (1) is provided with a connecting duct (9) that connects the second end (5) of the first exhaust manifold (2) to the first end (6) of the second exhaust manifold (3). The exhaust module is also provided with a second connecting duct (8) for connecting the second end (7) of the second exhaust manifold with a turbine inlet (20).
摘要:
An exhaust gas cleaning catalyst is provided in an exhaust passage of an internal combustion engine to convert NOx in exhaust gas. The exhaust gas cleaning catalyst includes a carrier; a plurality of kinds of metal catalysts which are supported on the carrier; and an NOx absorbent which is supported on the carrier and has an NOx storage capacity. The exhaust gas cleaning catalyst includes at least platinum and rhodium as the metal catalysts. A Pt/Rh mass ratio in an upstream portion (65 a) including an exhaust gas inlet side end is different from the Pt/Rh mass ratio in a downstream portion (65 b) including an exhaust gas outlet side end, and the Pt/Rh mass ratio in the upstream portion (65a) is higher than the Pt/Rh mass ratio in the downstream portion (65b). The Pt/Rh mass ratio is a mass ratio of platinum to rhodium.
摘要:
To provide a vehicle exhaust system structure capable of easily improving output performance in comparison with a two-cylinder internal combustion engine having the same displacement and outputting an appealing and excellent exhaust sound relating to the two-cylinder internal combustion engine, in a four-cylinder internal combustion engine or a three-cylinder internal combustion engine. An exhaust pipe structure for an internal combustion engine is configured such that exhaust pipes 21, 22, 23, 24 are respectively connected to four cylinders 11, 12, 13, 14 of a four-cylinder internal combustion engine, the two exhaust pipes 21, 22 of the exhaust pipes 21, 22, 23, 24 are formed as long exhaust pipes 150 having a long pipe length while the other two exhaust pipes 23, 24 thereof are formed as short exhaust pipes 151 having a short pipe length, and a difference in a pipe length between the long exhaust pipes 150 and the short exhaust pipes 151 is set to 150 mm or more.
摘要:
Die Erfindung betrifft eine Abgasbehandlungseinrichtung zur Aufbereitung von Abgas einer Brennkraftmaschine (1). Es ist vorgesehen, dass die Abgasbehandlungseinrichtung einen ersten Abgaspfad (20), in dem wenigstens eine erste Abgasreinigungseinrichtung (21) angeordnet ist, und einen zweiten Abgaspfad (30), in dem wenigstens eine zweite Abgasreinigungseinrichtung (31) angeordnet ist, umfasst, wobei die beiden Abgasreinigungseinrichtungen (21, 31) parallel von Abgas durchströmbar sind. Die beiden Abgasreinigungseinrichtungen (21, 31) sind derart ausgestaltet, dass mit der zweiten Abgasreinigungseinrichtung ein geringerer Abgasgegendruck bewirkbar ist, als mit der ersten Abgasreinigungseinrichtung.
摘要:
An object of the present invention is to provide an engine with an exhaust treatment device with which an attachment task of the exhaust treatment device to an engine rear upper portion becomes simplified. In order to achieve the object, in a case where an other-side support stay fastening tool 13 is brought into a cutout groove 20 from an opening 23 of the cutout groove while guiding a front portion 12a of an other-side support stay 12 by an other-side support stay mount surface 9, rotation moment of the other-side support stay 12 generated by a load of an other-side portion 50 of an exhaust treatment device 2 is received by the other-side support stay fastening tool 13 via an edge portion 21 of the cutout groove 20, so that the load of the other-side portion 50 of the exhaust treatment device 2 can be supported by the other-side support stay 12, and by providing one-side temporary mount portions 22 in a one-side support stay 10, a one-side portion 4 of the exhaust treatment device 2 before being attached to an engine exhaust outlet flange 3 and the one-side support stay 10 can be temporarily mounted on the one-side temporary mount portions 22.
摘要:
An exhaust gas conversion system includes an oxide catalyst, a filter, and a SCR (Selective Catalytic Reduction) catalyst that are sequentially arranged in a direction in which an exhaust gas flows in an exhuast path of a diesel engine, and a part positioned between the filter and the SCR catalyst and configured to supply ammonia. The filter is a honeycomb structural body including a honeycomb unit having a plurality of through holes divided by partition walls and arranged in a longitudinal direction thereof and the plural through holes are sealed on one end of the honeycomb unit. The SCR catalyst is a honeycomb structural body including a honeycomb unit having a plurality of through holes divided by partition walls and arranged in a longitudinal direction thereof. A ratio of an area of a cross section of the SCR catalyst perpendicular to a longitudinal direction of the SCR catalyst with respect to an area of a cross section of the filter perpendicular to a longitudinal direction of the DPF is 0.55 or more and 0.90 or less. The area of the cross section of the filter perpendicular to the longitudinal direction of the DPF is 300 cm 2 or more and 1000 cm 2 or less.
摘要:
The invention relates to a multicartridge diesel soot particulate filter (100) comprising a casing delimiting the outer boundary of a filter volume. The filter has a central filter axis (170). The casing has an inflow side and an outflow side defining an average flow direction being substantially parallel to the central axis. The filter volume is filled with at least two filter cartridges, each of these filter cartridges having a central filter cartridge axis (170). The central filter cartridge axis (170) of the filter cartridges is substantially parallel to the average flow direction of the filter. The filter cartridges comprise a porous structure (101) comprising metal fibers. The filter cartridges provide a radial flow direction through said porous structure (101). The flow through the multicartridge diesel soot particulate filter is axial while the flow through the filter cartridges is radial. The invention further relates to a method of manufacturing a multicartridge diesel soot particulate filter.
摘要:
An object is to provide a technology with which the temperature of exhaust gas can be raised with improved efficiency in cases where a catalyst apparatus including a catalyst having an oxidizing ability is provided in an exhaust passage of an internal combustion engine. According to the present invention, a catalyst apparatus (6) that is provided in the exhaust passage (1) of the internal combustion engine and to which reducing agent is supplied from upstream when the temperature of the exhaust gas is to be raised is equipped with at least first and second catalysts (4, 5) having an oxidizing ability. The first catalyst (4) is configured in such a way that the exhaust gas flows through a gap between its outer circumferential surface and the inner circumferential surface of the exhaust passage. The second catalyst (5) is disposed downstream of the first catalyst (4) with a space (10) having a specific width Ws between it and the first catalyst (4).