公开(公告)号：US20160186627A1

公开(公告)日：2016-06-30

申请号：US14911364

申请日：2014-07-03

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yuki HABA ,  Yusuke NOZAKI ,  Kohei YOSHIDA

IPC: F01N3/08 ,  F01N11/00 ,  F01N3/36

CPC classification number: F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N3/36 ,  F01N11/00 ,  F01N11/002 ,  F01N2610/03 ,  F01N2900/1602 ,  F01N2900/1614 ,  Y02C20/10 ,  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. When releasing the stored NOx from the exhaust purification catalyst (13), usually combustion gas of a rich air-fuel ratio is generated in the combustion chamber (2) to make the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) rich. When releasing the stored NOx from the exhaust purification catalyst (13) in case where the temperature of the exhaust purification catalyst (13) is low, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) is made rich by injecting hydrocarbons from the hydrocarbon feed valve (15).

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）。 当从排气净化催化剂（13）中释放储存的NOx时，通常在燃烧室（2）中产生富空燃比的燃烧气体，使排气的空燃比流入排气净化催化剂 （13）丰富。 在排气净化催化剂（13）的温度低的情况下从排气净化催化剂（13）中释放储存的NOx的情况下，流入排气净化催化剂（13）的废气的空燃比变浓 通过从烃进料阀（15）注入烃。

公开(公告)号：US20160201538A1

公开(公告)日：2016-07-14

申请号：US14914386

申请日：2014-07-03

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

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

IPC: F01N3/20 ,  F01N9/00

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 and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX removal method which reduces NOX contained in an exhaust gas by a reducing intermediate which is generated by injecting hydrocarbons from the hydrocarbon feed valve within a predetermined range of period and a second NOX removal method in which an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made rich by a period which is longer than this predetermined range are used. The switching temperatures ST and ST0 of the exhaust purification catalyst at which temperature an NOX removal method is switched from the second NOX removal method to the first NOX removal method, are made lower if the amount of NOX in the exhaust gas flowing into the exhaust purification catalyst increases.

Abstract translation: 在内燃机中，碳氢化合物供给阀和排气净化催化剂配置在发动机排气通路内。 第一NO x去除方法，其通过在预定时间段内从烃进料阀喷射烃而产生的还原中间体来还原废气中的NO x，以及第二NO x去除方法，其中排气的空燃比 流入排气净化催化剂的气体的浓度比使用该规定范围的时间长。 如果流入排气净化的排气中的NO x的量，则排气净化催化剂的开关温度ST和ST0在NOX去除方法从第二NOX去除方法转换到第一NOX去除方法的温度下降低 催化剂增加。

公开(公告)号：US20160195032A1

公开(公告)日：2016-07-07

申请号：US14910847

申请日：2014-06-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yuki HABA ,  Kohei YOSHIDA ,  Yusuke NOZAKI

IPC: F02D41/02 ,  F02D41/14 ,  F01N3/08

CPC classification number: F02D41/0275 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N3/2066 ,  F01N3/208 ,  F01N2370/02 ,  F01N2430/06 ,  F01N2610/03 ,  F01N2900/0412 ,  F01N2900/0422 ,  F01N2900/1602 ,  F01N2900/1614 ,  F01N2900/1622 ,  F02D41/1454 ,  F02D41/1475 ,  F02D2200/0806 ,  F02D2200/0808 ,  Y02T10/24

Abstract: In an internal combustion engine, a hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX removal method which injects hydrocarbons from the hydrocarbon feed valve within a predetermined range of period so that the reducing intermediate generated thereby reduces the NOX contained in the exhaust gas and a second NOX removal method which makes the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst a first target rich air-fuel ratio by a period which is longer than this predetermined range are used. When the NOX removal method is switched from the second NOX removal method to the first NOX removal method, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made a second target air-fuel ratio which is smaller than the first target rich air-fuel ratio.

Abstract translation: 在内燃机中，碳氢化合物供给阀和排气净化催化剂配置在发动机排气通路内。 第一NOX去除方法，其在预定范围内从烃进料阀喷射碳氢化合物，使得由此产生的还原中间体减少废气中所含的NO x，以及第二NOX去除方法，其使排气的空燃比 使用流入排气净化催化剂的第一目标浓空燃比长于该预定范围的时段。 当NOX去除方法从第二NOX去除方法切换到第一NOX去除方法时，流入排气净化催化剂的废气的空燃比被制成小于第一NOX去除方法的第一目标空燃比 目标丰富的空燃比。