Method for detecting fuel in oil of an internal combustion engine

• US 20070144251A1
• Filed: 09/25/2006
• Published: 06/28/2007
• Est. Priority Date: 11/19/2004
• Status: Abandoned Application

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: Krage, Mark, Lin, Yingjie, Han, Taeyoung, Wu, Ming-Cheng, Wang, Su-Chee
• Application Number:
  US11/527,050
• Publication Number:
  US 20070144251A1
• Time in Patent Office: Days
• US Class Current: 73/291
• CPC Class Codes: F01M 1/18 Indicating or safety devices concerning lubricant level F01M11/06, F01M11/12

Abstract

A method for detecting fuel leaking into an oil pan containing oil which is used to lubricate an internal combustion engine utilizes a plurality of sensors. The method includes the step of measuring a plurality of parameters of the oil using each of the plurality of sensors to create measured values. A fuel leakage value is calculated incorporating each of the measured values. The method then determines when the fuel leakage value exceeds a predetermined value.

Claims

1-17. -17. (canceled)

18. A method for detecting a massive amount of fuel leaking into an oil pan containing oil used to lubricate an internal combustion engine, wherein the method utilizes a temperature sensor and an electrical resistance sensor, the method including the steps of:

measuring the temperature of the oil when the internal combustion engine is running to create a temperature value;

measuring the electrical resistance of the oil when the internal combustion engine is running to create a resistance value;

compensating the resistance value based on the temperature value to create a compensated resistance value; and

identifying a massive fuel leak when the compensated resistance value exceeds a predetermined threshold.

19. A method as set forth in claim 18 including the step of repeating the steps of measuring the temperature and measuring the electrical resistance when the internal combustion engine is running.

20. A method as set forth in claim 19 including the step of normalizing the compensated resistance value each time the step of repeating is completed.