Method and apparatus for executing a shift in a hybrid transmission

Method for executing a transmission shift in a hybrid powertrain system including first and second electric machines, comprising:

• 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, evaluating shift costs for available recovery shift paths;
• selecting as a preferred recovery shift path the available recovery shift path having a minimum shift cost;
• and
• executing the preferred recovery shift path to achieve a non-neutral transmission state.

Method for operating a hybrid transmission, comprising:

• executing a multi-stage shift sequence to shift the transmission from an initial state to a target state including executing an intermediate shift to neutral;
• upon detecting a change in an output torque request during operating in neutral, identifying possible recovery shift paths to achieve a non-neutral state;
• determining shift costs for the possible recovery shift paths;
• and
• selecting and executing a preferred one of the recovery shift paths, the preferred recovery shift path comprising the possible recovery shift path having a minimum shift cost.