公开(公告)号：EP2475852A1

公开(公告)日：2012-07-18

申请号：EP10742749.4

申请日：2010-08-03

申请人： Bayerische Motoren Werke Aktiengesellschaft

发明人： MIKLAUTSCHITSCH, Manfred ,  BUCHER, Samuel ,  BABERNITS, Stefan ,  BECKER, Julian

IPC分类号： F01N3/22 ,  F01N3/30 ,  F01N3/34 ,  F02D41/02 ,  F02D41/06 ,  F02M25/07 ,  F02D13/02

CPC分类号： F01N3/34 ,  F01N3/22 ,  F01N3/30 ,  F01N2430/10 ,  F02B37/00 ,  F02D13/0207 ,  F02D13/0261 ,  F02D41/0255 ,  F02D41/064 ,  F02D41/402 ,  F02M26/01 ,  Y02T10/18 ,  Y02T10/26 ,  Y10T29/49231

摘要： The invention relates to an internal combustion engine (1), comprising at least one combustion chamber (2) and an exhaust gas system (3) arranged on an exhaust gas outlet channel (5), the exhaust gas system having at least one secondary air injection device (4) for injecting secondary air into the exhaust gas system (3) between the combustion chamber (2) and an exhaust emission control system (5) arranged in the exhaust gas system (3), wherein during operation of the internal combustion engine (1), a residual gas content in the combustion chamber (2) can be changed, and a secondary air injection point (4') on the exhaust gas system (3) is arranged so far from the combustion chamber (2) that injected secondary air flows back into the exhaust gas outlet channel (5) due to backflowing exhaust gas in the exhaust gas system (3) but does not flow back into the combustion chamber (2). The embodiment according to the invention makes it possible to comply with SULEV emissions limits even for engines having many combustion chambers and/or exhaust gas turbochargers, for which a SULEV certification previously seemed impossible.

摘要翻译： 内燃机具有至少一个燃烧室和布置在废气出口上的废气系统。 排气系统包括至少一个二次空气注入装置，用于将二次空气注入到排气系统中的燃烧室和排放在排气系统中的废气排放控制系统之间。 在内燃机的运转中，可以改变燃烧室中的残留气体含量。 排气系统上的二次空气注入位置被布置成远离燃烧室，由于废气系统中的废气排出，注入的二次空气流回到废气出口，但不会流回燃烧 室。 这使得即使对于具有许多燃烧室和/或废气涡轮增压器的发动机也可以符合SULEV排放限制。