公开(公告)号：US06279537B1

公开(公告)日：2001-08-28

申请号：US09456504

申请日：1999-12-08

申请人： Tosiaki Yonekura ,  Hideaki Katashiba ,  Satoshi Wachi ,  Hirofumi Ohuchi

发明人： Tosiaki Yonekura ,  Hideaki Katashiba ,  Satoshi Wachi ,  Hirofumi Ohuchi

IPC分类号： F02D4304

CPC分类号： F01N3/0842 ,  F02D41/0275 ,  F02D41/1401 ,  F02D41/1462 ,  F02D2200/0806

摘要： In order to improve estimation accuracy of estimating the value of the NOx exhaust concentration, the air fuel ratio control apparatus is adapted to estimate the NOx exhaust concentration from at least either one of a value depending on the air fuel ratio or a value depending on the exhaust gas recirculation quantity and a value depending to the ignition timing by means of the ECU 230.

摘要翻译： 为了提高估计NOx排出浓度的值的估计精度，空燃比控制装置适用于根据空燃比或取决于空燃比的值中的至少一个来估计NOx排出浓度 废气再循环量和借助于ECU 230的点火正时值。

公开(公告)号：US06519932B2

公开(公告)日：2003-02-18

申请号：US09438976

申请日：1999-11-12

申请人： Hirofumi Ohuchi ,  Satoshi Wachi ,  Hideaki Katashiba ,  Tosiaki Yonekura

发明人： Hirofumi Ohuchi ,  Satoshi Wachi ,  Hideaki Katashiba ,  Tosiaki Yonekura

IPC分类号： F01N300

CPC分类号： F01N3/0842 ,  F02D41/0275 ,  F02D41/1475 ,  F02D41/405 ,  F02D2250/36 ,  Y02T10/44

摘要： In order to suppress the quantity of the nitrogen oxide to be released to the atmosphere when the operation state is shifted from the engine operation with lean air fuel ratio to that with stoichiometric air fuel ratio, the exhaust gas purification apparatus is arranged such that by forced rich operation, when the operation state is shifted from the engine operation with lean air fuel ratio to that with stoichiometric air fuel ratio, the operation state is shifted to the engine operation with stoichiometric air fuel ratio after performing that with rich air fuel ratio.

摘要翻译： 为了抑制将运转状态从空燃比的发动机运转转换成具有化学计量空燃比的氮氧化物释放到大气中的排出气体净化装置，通过强制 在运转状态从空燃比的发动机转换为具有理想空燃比的运转状态的情况下，以浓空燃比进行运转后，以理论空燃比转换为发动机运转状态。

公开(公告)号：US06345498B2

公开(公告)日：2002-02-12

申请号：US09456503

申请日：1999-12-08

申请人： Tosiaki Yonekura ,  Satoshi Wachi ,  Hideaki Katashiba ,  Hirofumi Ohuchi

发明人： Tosiaki Yonekura ,  Satoshi Wachi ,  Hideaki Katashiba ,  Hirofumi Ohuchi

IPC分类号： F01N300

CPC分类号： F01N3/0842 ,  F01N11/007 ,  F01N2550/03 ,  F02D41/0275 ,  F02D41/1441 ,  F02D2200/0806 ,  Y02T10/47

摘要： An exhaust gas purifier for an internal combustion engine which is capable of detecting the deterioration degree of an NOx catalyst making use of a time elapsed from the time when the air-fuel ratio of exhaust gas flowing into an NOx absorber catalyst is made rich to the time when the air-fuel ratio of exhaust gas flowing out from the NOx absorber catalyst becomes rich. When the time required for a change in the output level of an air-fuel ratio sensor is shorter than a predetermined time, the time required for the change in the output level of the air-fuel ratio sensor is lengthened by reducing the rich degree at the time of rich operation, thereby judging the deterioration degree of the NOx absorber catalyst with accuracy.

摘要翻译： 一种用于内燃机的废气净化器，其能够检测使用从流入NOx吸收剂催化剂的废气的空燃比的时间起经过的时间的NOx催化剂的劣化程度变浓 从NOx吸收剂催化剂流出的排气的空燃比变浓时的时间。当空燃比传感器的输出水平的变化比预定时间短时所需的时间为 空燃比传感器的输出电平的变化通过减少富操作时的浓度而延长，从而准确地判断NOx吸收剂催化剂的劣化程度。