Gm Global Technolgoy Operations, Inc.

Other

Brian K Kowalczyk

Marilyn L Kindermann

Brian Carl Nelson

Christian G Masson

Allen B Rayl, Jr

Daniel G Brennan

A method to adjust an oil control valve actuation response time using cylinder valve diagnostic results includes commanding an engine cylinder to deactivate/reactive when conditions are met and then detecting if a deactivation/reactivation response time failure has occurred by analyzing the cylinder diagnostics results. If a predetermined number of failures are detected at the cylinder within a predetermined number of engine cycles then the engine controller operates to adjust the oil control valve response time to improve the response time accuracy.

Method to adjust an oil control valve actuation response time using cylinder valve diagnostics

A system for detecting a change in medium sensed by a thermistor comprises a first module that receives a temperature signal from a thermistor and that calculates a first dissipation factor of the thermistor. A second module receives the first dissipation factor of the thermistor and detects at least one of an unexpected medium and a change in medium based on the first dissipation factor.

System and method for detecting an unexpected medium or a change of medium sensed by a thermistor

A system includes a first module, a second module, and a third module. The first module determines a first temperature and a first power dissipation value of a thermistor based on a resistance of a first resistor connected in series with the thermistor. The second module, after disconnecting the first resistor and connecting a second resistor in series with the thermistor, determines a second temperature and a second power dissipation value of the thermistor based on a resistance of the second resistor. The third module determines a thermal dissipation factor based on the first and second temperatures and the first and second power dissipation values, and corrects temperature sensed by the thermistor based on the thermal dissipation factor.

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Howell, MI, United States of America

Brian K Kowalczyk