Method and apparatus for executing a shift in a hybrid transmission
A method for executing a transmission shift in a hybrid transmission including first and second electric machines includes executing a shift-through-neutral sequence from an initial transmission state to a target transmission state including executing an intermediate shift to neutral. Upon detecting a change in an output torque request while executing the shift-through-neutral sequence, possible recovery shift paths are identified. Available ones of the possible recovery shift paths are identified and a shift cost for each said available recovery shift path is evaluated. The available recovery shift path having a minimum shift cost is selected as a preferred recovery shift path and is executed to achieve a non-neutral transmission state.
- Research Organization:
- GM Global Technology Operations LLC (Detroit, MI)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-08NT04386
- Assignee:
- GM Global Technology Operations LLC (Detroit, MI)
- Patent Number(s):
- 8,523,735
- Application Number:
- 13/402,946
- OSTI ID:
- 1093241
- Country of Publication:
- United States
- Language:
- English
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