Methods and system for engine control during gear shifting in a hybrid electric vehicle

A system for a hybrid electric vehicle, comprising:

• a driveline disconnect clutch positioned between an integrated starter/generator and a traction motor, the traction motor downstream of the integrated starter/generator and upstream of a transmission;
• an engine positioned upstream of the integrated starter/generator;
• an electrical energy storage device;
• and
• a controller with computer readable instructions stored on non-transitory memory that, when executed, cause the controller to:
• in response to a request to shift the transmission under conditions where the driveline disconnect clutch is fully open and where the traction motor is providing a driver demanded power to driven wheels of the vehicle via electric power generated by the engine, determine a storage capacity of the electrical energy storage device;
• and
• maintain an engine power output and transfer an electric power equivalent to the driver demanded power from the traction motor to charging the electrical energy storage device under conditions where the driver demanded power is less than the storage capacity of the electrical energy storage device.