发明名称 |
EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE |
摘要 |
The exhaust purification system comprises an exhaust purification catalyst 20, a downstream side air-fuel ratio sensor 41, and a control device 31. The control device 31 performs average air-fuel ratio control which alternatively sets a target average air-fuel ratio between a rich air-fuel ratio and a lean air-fuel ratio and inter-cylinder air-fuel ratio control which controls the target air-fuel ratios of the cylinders so that the target air-fuel ratio becomes the rich air-fuel ratio at least at one cylinder among the plurality of cylinders even if the target average air-fuel ratio is set to the lean air-fuel ratio. As learning control, the control device 31 uses a cumulative value of a first oxygen amount from a time when the target average air-fuel ratio to the lean air-fuel ratio to a time when the target average air-fuel ratio is switched back to the rich air-fuel ratio and a cumulative value of a second oxygen amount from a time when the target average air-fuel ratio is switched to the rich air-fuel ratio to when again switching it to the lean air-fuel ratio as the basis for correcting a parameter relating to the air-fuel ratio so that the difference of these decreases. |
申请公布号 |
EP3067540(A1) |
申请公布日期 |
2016.09.14 |
申请号 |
EP20160159933 |
申请日期 |
2016.03.11 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
YAMAGUCHI, YUJI;HOSHI, KOICHI;HOKUTO, HIROYUKI;SUZUKI, KAZUYA;MIYOSHI, YUJI |
分类号 |
F02D41/00;F01N3/10;F01N11/00;F02D41/02;F02D41/14;F02D41/24 |
主分类号 |
F02D41/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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