公开(公告)号：WO2015029612A1

公开(公告)日：2015-03-05

申请号：PCT/JP2014/068374

申请日：2014-07-03

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： BISAIJI, Yuki ,  YOSHIDA, Kohei ,  HABA, Yuki ,  NOZAKI, Yusuke

IPC: F01N9/00 ,  F01N3/08

CPC classification number: F01N3/2066 ,  F01N3/021 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N9/00 ,  F01N2240/30 ,  F01N2430/06 ,  F01N2560/06 ,  F01N2610/03 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1602 ,  Y02T10/47

Abstract: In an internal combustion engine, a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged in an engine exhaust passage. A first NO x removal method which reduces NO x contained in an exhaust gas by a reducing intermediate which is generated by injecting hydrocarbons from the hydrocarbon feed valve (15) within a predetermined range of period and a second NO x removal method in which an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) is made rich by a period which is longer than this predetermined range are used. The switching temperatures ST and ST o of the exhaust purification catalyst (13) at which temperature an NO x removal method is switched from the second NO x removal method to the first NO x removal method, are made lower if the amount of NO x in the exhaust gas flowing into the exhaust purification catalyst (13) increases.

Abstract translation: 在内燃机中，在发动机排气通路中配置有碳氢化合物供给阀（15）和排气净化催化剂（13）。 第一NOx去除方法，其通过在预定范围内从烃进料阀（15）喷射烃而产生的还原中间体来还原废气中的NOx，以及第二NOx去除方法，其中空燃比 流入排气净化催化剂（13）的废气的浓度比使用该规定范围的时间长。 如果排气中的NOx的量流入，则排气净化催化剂（13）的开始温度ST和STo在NOx排出方法的温度从第二NOx去除方法切换到第一NOx去除方法时降低 排气净化催化剂（13）增加。

公开(公告)号：WO2015019737A1

公开(公告)日：2015-02-12

申请号：PCT/JP2014/066917

申请日：2014-06-19

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： BISAIJI, Yuki ,  YOSHIDA, Kohei

IPC: F01N3/08 ,  F01N3/20 ,  F02D41/02 ,  B01D53/94 ,  F01N9/00 ,  F01N3/035

CPC classification number: F01N3/208 ,  B01D53/9409 ,  B01D53/9422 ,  B01D53/9477 ,  B01D53/9495 ,  B01D2251/208 ,  B01D2255/1021 ,  B01D2255/20738 ,  B01D2255/50 ,  B01D2255/91 ,  B01D2258/012 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N3/2066 ,  F01N9/007 ,  F01N2240/30 ,  F01N2370/02 ,  F01N2430/06 ,  F01N2510/06 ,  F01N2610/02 ,  F01N2610/03 ,  F01N2900/0412 ,  F01N2900/0416 ,  F01N2900/0422 ,  F01N2900/1402 ,  F01N2900/1602 ,  F01N2900/1614 ,  F01N2900/1622 ,  F02D41/0235 ,  F02D41/0275 ,  F02D41/402 ,  F02D2200/08 ,  Y02T10/24

Abstract: An internal combustion engine in which a hydrocarbon feed valve (15), exhaust purification catalyst (13), and NO X selective reduction catalyst (14) are arranged in an engine exhaust passage. A first NO X removal method which injects hydrocarbons from the hydrocarbon feed valve (15) within a predetermined range of period and uses the reducing intermediate which is generated due to this so as to reduce the NO X contained in the exhaust gas and a second NO X removal method which makes the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) rich with a period longer than this predetermined range are used. When the first NO X removal method should be used and the amount of adsorbed ammonia at the NO X selective reduction catalyst 14 is large, use of the first NO X removal method is stopped.

Abstract translation: 在发动机排气通道中配置有碳氢化合物供给阀（15），排气净化催化剂（13）和NO x选择还原催化剂（14）的内燃机。 第一NOX去除方法，其在预定范围内从烃进料阀（15）中注入烃，并使用由此产生的还原中间体，以便减少废气中所含的NO x和第二NOX去除方法 这使得流入排气净化催化剂（13）中的废气的空燃比被使用的时间长于该预定范围。 当使用第一种NO x去除方法并且NO x选择还原催化剂14上吸附的氨的量大时，停止使用第一种NO x去除方法。

公开(公告)号：WO2015037405A1

公开(公告)日：2015-03-19

申请号：PCT/JP2014/071816

申请日：2014-08-14

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： UMEMOTO, Kazuhiro ,  YOSHIDA, Kohei ,  BISAIJI, Yuki

IPC: F01N3/08

CPC classification number: F01N9/002 ,  F01N3/0814 ,  F01N3/206 ,  F01N2430/06 ,  F01N2610/03 ,  F01N2610/146 ,  F01N2610/1493 ,  F02M26/04 ,  F02M26/32

Abstract: An internal combustion engine which is provided with a hydrocarbon feed valve (15) arranged in an engine exhaust passage. When injection control for injecting hydrocarbons from the hydrocarbon feed valve (15) for exhaust treatment is stopped, to prevent the hydrocarbon feed valve (15) from clogging, hydrocarbons for preventing clogging are injected from the hydrocarbon feed valve (15) when the engine is not discharging soot, that is, when the feed of fuel to the inside of the combustion chamber (2) is stopped and, after hydrocarbons for preventing clogging are injected once, the injection of hydrocarbons for preventing clogging from the hydrocarbon feed valve (15) is stopped until injection control for exhaust treatment is started.

Abstract translation: 一种内燃机，其设置有布置在发动机排气通道中的烃进料阀（15）。 当停止从用于排气处理的烃供给阀（15）注入碳氢化合物的注入控制时，为了防止烃供给阀（15）堵塞，当发动机为发动机时，从烃供给阀（15）喷射防止堵塞的烃 不排出烟灰，即当燃烧室（2）内部的燃料供给停止时，并且在用于防止堵塞的碳氢化合物被注入一次之后，注入用于防止从烃供给阀（15）堵塞的烃， 停止直到排气处理的喷射控制开始。