基本信息:
- 专利标题： METHOD AND SYSTEM FOR CYLINDER IMBALANCE ESTIMATION
- 申请号：US16271491 申请日：2019-02-08
- 公开(公告)号：US20190170073A1 公开(公告)日：2019-06-06
- 发明人： Joseph Lyle Thomas , Ethan D. Sanborn , Paul Hollar , Daniel Dusa
- 申请人： Ford Global Technologies, LLC
- 主分类号： F02D41/00
- IPC分类号： F02D41/00 ; F02D41/14 ; F02D41/24
摘要：
Methods and systems are provided for learning a cylinder-to-cylinder air variation. During conditions when a PFDI engine is operated in a port-injection only mode, prior to port fuel injection, a direct-injection fuel rail pressure may be lowered via direct-injection. Then, prior to a spark event in a port-injected cylinder, the direct-injector may be transiently opened to use the rail pressure sensor for estimating a cylinder compression pressure, and inferring cylinder air charge therefrom.
公开/授权文献:
- US10801431B2 Method and system for cylinder imbalance estimation 公开/授权日：2020-10-13