发明名称 |
Air-fuel ratio control system and method for an internal combustion engine |
摘要 |
<p>An air-fuel ratio control system for an internal combustion engine, which is capable of quickly and properly eliminating variation in air-fuel ratio between a plurality of cylinders. The air-fuel ratio control system 1 controls the amount of fuel to be supplied to first to fourth cylinders #1 to #4, on a cylinder-by-cylinder basis, thereby controlling the air-fuel ratio of a mixture supplied to each of the cylinders. A LAF sensor 14 delivers to an ECU 2 an output KACT indicative of the air-fuel ratio of exhaust gases emitted from the cylinders and merged. A cycle filter 23a and a rotation filter 23b filters the output KACT from the LAF sensor 14 such that components in respective bands of a first frequency fr1 and a second frequency fr2 are allowed to pass therethrough. A final fuel injection amount TOUT i is determined, on a cylinder-by-cylinder basis, according to a first filtered value KACT_Fc or a second filtered value KACT_Fr such that the amplitude of the filtered value KACT_Fc or KACT_Fr converges to a predetermined value.</p> |
申请公布号 |
EP1522702(A2) |
申请公布日期 |
2005.04.13 |
申请号 |
EP20040023817 |
申请日期 |
2004.10.06 |
申请人 |
HONDA MOTOR CO., LTD. |
发明人 |
MIZUNO, TAKAHIDE;YASUI, YUJI;MAKI, HIDETAKA |
分类号 |
F02D45/00;F02D41/00;F02D41/14;F02D41/34;(IPC1-7):F02D41/34 |
主分类号 |
F02D45/00 |
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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