Invention Grant
US09146177B2 System and method for diagnosing a fault in an oxygen sensor based on engine speed
有权
基于发动机转速诊断氧传感器故障的系统和方法
- Patent Title: System and method for diagnosing a fault in an oxygen sensor based on engine speed
- Patent Title (中): 基于发动机转速诊断氧传感器故障的系统和方法
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Application No.: US13672231Application Date: 2012-11-08
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Publication No.: US09146177B2Publication Date: 2015-09-29
- Inventor: Stephen Paul Levijoki , Thomas J. Majcher , Scott Jeffrey , John W. Siekkinen
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Main IPC: G01M15/00
- IPC: G01M15/00 ; G01M15/10 ; F01N11/00 ; F02D41/14 ; F02D41/22 ; G01N27/417 ; G01N33/00
Abstract:
A system according to the principles of the present disclosure includes an error count module and a sensor diagnostic module. The error count module increases an error count when an actual air/fuel ratio is different from a desired air/fuel ratio and selectively adjusts the error count based on an actual engine speed. An oxygen sensor generates a signal indicating the actual air/fuel ratio. The sensor diagnostic module diagnoses a fault in the oxygen sensor when the error count is greater than a first predetermined count.
Public/Granted literature
- US20140033812A1 SYSTEM AND METHOD FOR DIAGNOSING A FAULT IN AN OXYGEN SENSOR BASED ON ENGINE SPEED Public/Granted day:2014-02-06
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