METHOD AND APPARATUS FOR FAULT DETECTION IN A TORQUE MACHINE OF A POWERTRAIN SYSTEM
First Claim
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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Accused Products
Abstract
A method for operating a powertrain system including a torque machine mechanically coupled to an internal combustion engine includes, 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. The retry events are iteratively executed with a debounce time period preceding each retry event. Presence of a fault associated with the power switch is detected when a quantity of the retry events during a time window exceeds a threshold.
187 Citations
18 Claims
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1. Method for operating a powertrain system including a torque machine mechanically coupled to an internal combustion engine, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Method for operating a powertrain system including a torque machine mechanically coupled to an internal combustion engine, comprising:
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monitoring fault signals output from a plurality of power switches configured to control power flow to the torque machine; disabling torque output from the torque machine upon detecting a pending fault associated with one of the power switches; iteratively executing retry events subsequent to disabling torque output; and detecting a fault when a quantity of the retry events during a time window exceeds a threshold. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. Method for operating a powertrain system including a torque machine mechanically coupled to an internal combustion engine, comprising:
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disabling torque output from the torque machine and executing retry events upon detecting a pending fault associated with a power switch configured to control power flow to the torque machine; discontinuing executing the retry events when the pending fault clears; and reporting 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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Specification