摘要:
Deposition of urea is prevented or reduced by a simple measure in an exhaust system structure equipped with an addition device that adds aqueous urea solution to exhaust gas. An exhaust system structure for an internal combustion engine includes an exhaust pipe connected to the internal combustion engine and an addition device located midway in said exhaust pipe to add aqueous urea solution to exhaust gas flowing in said exhaust pipe. The outer wall of a portion of the exhaust pipe on which aqueous urea solution added by the addition device impinges is in contact with the outer wall of a component of the exhaust system arranged upstream of the aforementioned portion so that the temperature of the aforementioned portion is raised.
摘要:
A catalyst storage case (6) includes a case body (60) having an exhaust passage (60c) ; and first and second oxidation catalysts (61, 62) disposed in the exhaust passage (60c) of the case body (60). The first and second oxidation catalysts (61, 62) are arrayed in a direction intersecting a direction along which the exhaust passage (60c) extends.
摘要:
Two sets of assemblies (2a, 2b) are arranged such that a diesel particulate filter device (3) of the assembly (2a), a selective catalytic reduction device (4) of the assembly (2a), a selective catalytic reduction device (4) of the assembly (2b), and a diesel particulate filter device (3) of the assembly (2b) are located next to each other in this order. Exhaust tubes (6) are provided to extend upward from gas outlets (6a) of the selective catalytic reduction device (4) of the assembly (2a) and the selective catalytic reduction device (4) of the assembly (2b). The two exhaust tubes (6) are located on a virtual plane (E) orthogonal to longitudinal directions (B1, B2) of the selective catalytic reduction devices (4) of the assemblies (2a, 2b). Thereby, an air intake position for an engine (10) can be easily set to a position from which exhaust gas from the engine (10) is less likely to be taken in, in a configuration provided with two sets of assemblies (2a, 2b).
摘要:
A catalyst subassembly (20) for a device for purifying exhaust gases from an internal combustion engine, in particular a diesel engine, comprises an SCRF catalyst (26) and an SCR catalyst (24) upstream of the SCRF catalyst (26), the two catalysts being arranged in a common catalyst housing (28). The catalyst housing (28), the SCRF catalyst (26) and the SCR catalyst (24) can be selected from a modular system for different variants of the internal combustion engine.
摘要:
Deposition of urea is prevented or reduced by a simple measure in an exhaust system structure equipped with an addition device that adds aqueous urea solution to exhaust gas. An exhaust system structure for an internal combustion engine includes an exhaust pipe connected to the internal combustion engine and an addition device located midway in said exhaust pipe to add aqueous urea solution to exhaust gas flowing in said exhaust pipe. The outer wall of a portion of the exhaust pipe on which aqueous urea solution added by the addition device impinges is in contact with the outer wall of a component of the exhaust system arranged upstream of the aforementioned portion so that the temperature of the aforementioned portion is raised.
摘要:
L'invention se rapporte à système de dépollution (100) d'un groupe motopropulseur de véhicule, comportant un boitier (2, 102) destiné à être monté sur une ligne d'échappement d'un moteur thermique de véhicule, ledit boitier (2, 102) logeant un catalyseur (3) d'oxydation et un filtre à particules (4, 104). La principale caractéristique d'un système de dépollution (100) selon l'invention est que le boitier (102) est allongé et possède un méplat (120) apte à diminuer la section transversale dudit boitier (102), et en ce que ledit méplat (120) s'étend au moins partiellement le long dudit boitier (102).