发明申请
US20170167420A1 METHODS AND SYSTEMS FOR ESTIMATING EXHAUST PRESSURE WITH A VARIABLE VOLTAGE OXYGEN SENSOR
审中-公开
基本信息:
- 专利标题： METHODS AND SYSTEMS FOR ESTIMATING EXHAUST PRESSURE WITH A VARIABLE VOLTAGE OXYGEN SENSOR
- 申请号：US15438629 申请日：2017-02-21
- 公开(公告)号：US20170167420A1 公开(公告)日：2017-06-15
- 发明人： Daniel A. Makled , Gopichandra Surnilla , Richard E. Soltis , Michael McQuillen
- 申请人： Ford Global Technologies, LLC
- 主分类号： F02D41/14
- IPC分类号： F02D41/14 ; F02D41/00 ; F02D41/02 ; F02D41/30
摘要：
Methods and systems are provided for estimating an engine exhaust pressure based on outputs from an exhaust oxygen sensor. In one example, a method may include estimating an exhaust pressure of exhaust gas flowing through an engine exhaust passage based on a difference between a first output of an oxygen sensor disposed in the exhaust passage and a second output of the oxygen sensor and then adjusting engine operation based on the estimated exhaust pressure. As one example, both the first and second outputs may be taken while operating the sensor in a variable voltage mode, after increasing a reference voltage of the oxygen sensor from a lower, first voltage to a higher, second voltage.