发明名称 |
Individual cylinder fuel control method |
摘要 |
<p>An improved individual cylinder fuel control method based on sampled readings of a single oxygen sensor responsive to the combined exhaust gas flow of several engine cylinders. A model-based observer is used to reproduce the imbalances of the different cylinders and a proportional-plus-integral controller is used for their elimination. Both the observer and the controller are formulated in terms of a periodic system. The observer input signal is preprocessed such that it reflects at each point of time the deviation from the current A/F-ratio mean value calculated over two engine cycles. Therefore, transient engine operating conditions do not harm the reconstruction of the cylinder imbalances dramatically. The control algorithm features process/controller synchronization based on table lookup and a mechanism to automatically adjust the mapping between the observer estimates and the corresponding cylinders if unstable control operation is detected.</p> |
申请公布号 |
EP1136684(A2) |
申请公布日期 |
2001.09.26 |
申请号 |
EP20010100841 |
申请日期 |
2001.01.15 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
TURIN, RAYMOND C.;NAIK, SANJEEV M. |
分类号 |
F02D41/34;F02D45/00;F02D41/00;F02D41/14;F02D41/36;G05B11/36;(IPC1-7):F02D41/14 |
主分类号 |
F02D41/34 |
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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