公开(公告)号：US20160290268A1

公开(公告)日：2016-10-06

申请号：US15083378

申请日：2016-03-29

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shuntaro OKAZAKI ,  Kenji SUZUKI ,  Hiroshi MIYAMOTO ,  Yuji MIYOSHI

IPC: F02D41/14 ,  F01N11/00 ,  F01N13/00 ,  F01N3/10

CPC classification number: F02D41/1495 ,  F01N3/101 ,  F01N11/007 ,  F01N13/0093 ,  F01N2550/00 ,  F01N2560/025 ,  F01N2610/03 ,  F01N2900/0408 ,  F01N2900/0416 ,  F01N2900/0418 ,  F01N2900/1402 ,  F01N2900/1624 ,  F02D41/0295 ,  F02D41/1408 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/1456 ,  F02D41/1475 ,  F02D41/222 ,  F02D2200/0814 ,  F02D2200/0816 ,  Y02T10/22 ,  Y02T10/47

Abstract: An exhaust purification system comprises an exhaust purification catalyst, a downstream side air-fuel ratio sensor and a control device. The control device makes the air-fuel ratio of the exhaust gas change to an air-fuel ratio at a rich side from the prior air-fuel ratio as air-fuel ratio rich increasing control when the air-fuel ratio of the exhaust gas is made a rich air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor is maintained at a lean judged air-fuel ratio or more, and judges that the downstream side air-fuel ratio sensor suffers from an abnormality, when, due to the air-fuel ratio rich increasing control, the air-fuel ratio of the exhaust gas is made to change to the rich side air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor changes to the lean side.

Abstract translation: 排气净化系统包括排气净化催化剂，下游侧空燃比传感器和控制装置。 当排气的空燃比为空燃比时，控制装置使排气的空燃比从现有的空燃比变为富空侧的空燃比，作为空燃比富增加控制 使空燃比浓度大，并且将下游侧空燃比传感器的输出空燃比维持在稀薄的判定空燃比以上，判断为下游侧空燃比传感器受到 当由于空燃比丰富的控制使得废气的空燃比变为富侧的空燃比和下游侧空燃比的输出空燃比时， 比率传感器变为倾斜侧。

公开(公告)号：US20160265467A1

公开(公告)日：2016-09-15

申请号：US15066469

申请日：2016-03-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroyuki HOKUTO ,  Koichi HOSHI ,  Yuji MIYOSHI ,  Yuji YAMAGUCHI ,  Kazuya SUZUKI

IPC: F02D41/24 ,  F01N11/00 ,  F01N3/10 ,  F02D41/02 ,  F02D41/00

CPC classification number: F02D41/2461 ,  F01N3/10 ,  F01N9/00 ,  F01N2430/06 ,  F01N2550/02 ,  F01N2560/025 ,  F01N2570/04 ,  F01N2900/1404 ,  F01N2900/1624 ,  F02D41/008 ,  F02D41/0085 ,  F02D41/0295 ,  F02D41/1454 ,  F02D41/1475 ,  F02D2200/0802 ,  F02D2200/602 ,  Y02T10/47

Abstract: An exhaust purification system of an internal combustion engine which has a plurality of cylinders is comprised of an exhaust purification catalyst, a downstream side air-fuel ratio sensor, and a control device which controls the average air-fuel ratio of the exhaust gas and the combustion air-fuel ratios of the cylinders. The control device performs average air-fuel ratio control where it alternately controls the average air-fuel ratio between the rich air-fuel ratio and the lean air-fuel ratio and inter-cylinder air-fuel ratio control where it controls the combustion air-fuel ratios of the cylinders so that the combustion air-fuel ratio becomes the rich air-fuel ratio at least at one cylinder among the plurality of cylinders. In average air-fuel ratio control, the average air-fuel ratio is controlled so that the lean shift amount becomes smaller than the rich shift amount when the temperature of the exhaust purification catalyst is low and the average air-fuel ratio is controlled so that the lean shift amount becomes larger than the rich shift amount when the temperature is high.

Abstract translation: 具有多个气缸的内燃机的排气净化系统由排气净化催化剂，下游侧空燃比传感器和控制排气的平均空燃比的控制装置构成， 气缸的燃烧空燃比。 控制装置执行平均空燃比控制，其交替地控制浓空燃比和稀空燃比之间的平均空燃比以及其间控制燃烧空气燃料比的气缸间空燃比控制， 使得燃料空燃比在多个气缸中至少在一个气缸处成为浓空燃比。 在平均空燃比控制中，控制平均空燃比，使得当排气净化催化剂的温度低并且平均空燃比被控制时，贫偏移量变得比富位移量小，使得 当偏温量高时，浓偏移量变大。