发明名称 |
Fuel controller |
摘要 |
This invention relates to a method and apparatus for controlling the air-fuel ratio demanded by a fuel controller in order to maintain optimum performance of a catalytic converter. The invention provides a controller for requesting an air fuel ratio according to a switching value derived from an estimated oxygen storage value of a catalyst, in which the controller is arranged to perform the following steps a) request a maximum ratio of air to fuel when the switching value is less than a first threshold; b) gradually decrease the requested air to fuel ratio from said maximum ratio; c) request a minimum ratio of air to fuel when the switching value is greater than a second threshold; and d) gradually increase the requested air to fuel ratio from said minimum ratio.
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申请公布号 |
US2003093993(A1) |
申请公布日期 |
2003.05.22 |
申请号 |
US20020264642 |
申请日期 |
2002.10.04 |
申请人 |
LUTZ PHILIPPE PAUL ROBERT;HESLOP GARON NIGEL;MONTGOMERY DARREN;DIXON JON |
发明人 |
LUTZ PHILIPPE PAUL ROBERT;HESLOP GARON NIGEL;MONTGOMERY DARREN;DIXON JON |
分类号 |
F01N11/00;F02D41/02;F02D41/14;(IPC1-7):F01N3/00 |
主分类号 |
F01N11/00 |
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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