| 发明名称 |
METHOD AND SYSTEM FOR DETERMINING KNOCK CONTROL FLUID COMPOSITION |
| 摘要 |
Methods and systems are provided for accurately determining the composition of a knock control fluid using sensors already present in the engine system. An intake or an exhaust oxygen sensor is used to estimate the water and the alcohol content of a knock control fluid that is direct injected into an engine cylinder responsive to an indication of abnormal combustion. A change in the pumping current of the oxygen sensor due to the water content of the knock control fluid is distinguished from a change in the pumping current of the oxygen sensor due to the alcohol content of the knock control fluid. |
| 申请公布号 |
US2017107918(A1) |
申请公布日期 |
2017.04.20 |
| 申请号 |
US201514918483 |
申请日期 |
2015.10.20 |
| 申请人 |
Ford Global Technologies, LLC |
发明人 |
Hakeem Mohannad;Surnilla Gopichandra |
| 分类号 |
F02D19/12;F02P5/152 |
主分类号 |
F02D19/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An engine method, comprising:
injecting an amount of a water-alcohol blend; modulating a reference voltage of an exhaust oxygen sensor; monitoring a change in pumping current of the sensor; learning a first portion of the change in pumping current due to a water content of the blend; and learning a second portion of the change in pumping current due to an alcohol content of the blend. |
| 地址 |
Dearborn MI US |
