Patent ID: 9327589
Filing Date: 2016-05-03
CPC Classification: B60K,B60W,Y02T,Y10S

Claim Text:
1. A hybrid powertrain for propelling a vehicle comprising: an engine; an energy storage system operatively connected to the engine; wherein both the engine and the energy storage system are operable for providing power to propel the vehicle; a control system operatively connected to the engine and the energy storage system and configured to execute a stored algorithm that: wherein in the first operating mode the engine is off and power from the energy storage system alone propels the vehicle; wherein in the second operating mode power from the energy storage system propels the vehicle and the engine is on to add power to propel the vehicle when the power capability of the energy storage system is insufficient to provide a predetermined level of power; wherein in the third operating mode power from the energy storage system propels the vehicle, and the engine is on to add power to propel the vehicle when the power capability of the energy storage system is insufficient to provide the predetermined level of power, and the engine is on to add energy to the energy storage system when the remaining energy of the energy storage system is less than the required energy reserve; and wherein the engine is controlled to run at a first range of speeds in the second operating mode, and to run at a second range of speeds higher than the first range of speeds in the third operating mode.