Invention Grant
- Patent Title: Method of monitoring a differential pressure sensor of an exhaust gas treatment system
- Patent Title (中): 监测废气处理系统的差压传感器的方法
-
Application No.: US13490868Application Date: 2012-06-07
-
Publication No.: US08640441B2Publication Date: 2014-02-04
- Inventor: Vincent J. Tylutki , Benjamin Radke , Janean E. Kowalkowski
- Applicant: Vincent J. Tylutki , Benjamin Radke , Janean E. Kowalkowski
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn Law Group, PLLC
- Main IPC: F01N3/00
- IPC: F01N3/00

Abstract:
A method of monitoring a differential pressure sensor of an exhaust gas aftertreatment system includes sensing a learned value (n−1, n, n+1, n+2, etc.) of the differential pressure sensor for each after-run occurrence of the vehicle, and calculating an absolute value of a rate of change between a current (n) learned value of the differential pressure sensor and a previous (n−1) learned value of the differential pressure sensor. The absolute value of the rate of change is compared to a threshold pressure value to determine if the absolute value of the rate of change is greater than the threshold pressure value or is less than the threshold pressure value. A fault in the differential pressure sensor is signaled when the absolute value of the rate of change of the learned values is greater than the threshold pressure value.
Public/Granted literature
- US20130327018A1 METHOD OF MONITORING A DIFFERENTIAL PRESSURE SENSOR OF AN EXHAUST GAS TREATMENT SYSTEM Public/Granted day:2013-12-12
Information query