| 发明名称 | Methods and system for fuel ethanol content estimation and engine control | ||
| 摘要 | Methods and systems are provided for determining an amount of alcohol in fuel injected into an engine based on outputs from an exhaust gas sensor. In one example, a method includes estimating a first fuel alcohol content based on an air-fuel ratio estimated with the exhaust oxygen sensor and estimating a second fuel alcohol content based on a change in sensor output during modulating a reference voltage of the exhaust oxygen sensor between a first and second voltage. The method further includes adjusting engine operation based on a difference between the first and second fuel alcohol contents. | ||
| 申请公布号 | US9528448(B2) | 申请公布日期 | 2016.12.27 |
| 申请号 | US201514626623 | 申请日期 | 2015.02.19 |
| 申请人 | Ford Global Technologies, LLC | 发明人 | Makled Daniel A.;Surnilla Gopichandra;Soltis Richard E.;Skoures Evangelos P.;Visser Jacobus Hendrik;Clark Timothy Joseph;Scholl David James |
| 分类号 | F02D19/08;F02D41/14;F02D35/00;F02D19/06;G01M15/10 | 主分类号 | F02D19/08 |
| 代理机构 | Alleman Hall McCoy Russell & Tuttle LLP | 代理人 | Voutyras Julia;Alleman Hall McCoy Russell & Tuttle LLP |
| 主权项 | 1. A method, comprising: estimating a first fuel alcohol content based on an air-fuel ratio estimated with an exhaust oxygen sensor; after an engine temperature increases above a threshold, estimating a second fuel alcohol content based on a change in sensor output during modulating a reference voltage of the exhaust oxygen sensor between a first and second voltage; and adjusting engine operation based on a difference between the first and second fuel alcohol contents. | ||
| 地址 | Dearborn MI US | ||