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METHOD AND APPARATUS FOR FAULT DETECTION IN A TORQUE MACHINE OF A POWERTRAIN SYSTEM

  • US 20130006453A1
  • Filed: 06/28/2011
  • Published: 01/03/2013
  • Est. Priority Date: 06/28/2011
  • Status: Active Grant
First Claim
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1. Method for operating a powertrain system including a torque machine mechanically coupled to an internal combustion engine, comprising:

  • upon detecting a pending fault associated with a power switch configured to control power flow to the torque machine, disabling torque output from the torque machine and executing retry events, wherein the retry events are iteratively executed with a debounce time period preceding each retry event; and

    detecting presence of a fault associated with the power switch when a quantity of the retry events during a time window exceeds a threshold.

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