| 发明名称 |
METHOD AND SYSTEM FOR DETERMINING AIR-FUEL RATIO IMBALANCE |
| 摘要 |
Methods and systems are presented for assessing the presence or absence of cylinder air-fuel ratio deviation that may result in air-fuel ratio imbalance between engine cylinders. In one example, the method may include assessing the presence or absence of air-fuel ratio errors based on deviation from an expected air-fuel ratio during a deceleration fuel shut-off event. |
| 申请公布号 |
US2016258375(A1) |
申请公布日期 |
2016.09.08 |
| 申请号 |
US201514641073 |
申请日期 |
2015.03.06 |
| 申请人 |
Ford Global Technologies, LLC |
发明人 |
Jammoussi Hassene;Makki Imad Hassan;Kluzner Michael I.;Jentz Robert Roy |
| 分类号 |
F02D41/14;F02D41/02;F02D41/12 |
主分类号 |
F02D41/14 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method, comprising:
during a deceleration fuel shut-off (DFSO) event, sequentially firing cylinders of a cylinder group, each fueled with a selected fuel pulse width, and indicating an air-fuel ratio variation for each cylinder based on air-fuel deviation from a maximum lean air-fuel ratio during the DFSO. |
| 地址 |
Dearborn MI US |
