Hybrid powertrain and method for operating same

摘要

A hybrid powertrain includes an internal combustion engine, a load coupled to the internal combustion engine via a mechanical transmission for transmission of a first shaft power therebetween, a turbine fluidly coupled to an exhaust of the internal combustion engine, a generator operatively coupled to the turbine for transmission of a second shaft power therebetween, and electrically coupled to an electric battery, a motor-generator operatively coupled to the mechanical transmission for transmission of a third shaft power therebetween, and electrically coupled to the electric battery; and a controller operatively coupled to the internal combustion engine. The controller is configured to adjust a relative proportion of the third shaft power compared to the first shaft power by adjusting at least one of a combustion timing of the internal combustion engine and an exhaust valve timing of the internal combustion engine.

主权项

1. A hybrid powertrain, comprising:
an internal combustion engine; a load coupled to the internal combustion engine via a mechanical transmission for transmission of a first shaft power therebetween;
wherein the mechanical transmission includes a continuously variable transmission (CVT) having an input mechanically coupled to an output of the internal combustion engine; a turbine fluidly coupled to an exhaust of the internal combustion engine; a generator operatively coupled to the turbine for transmission of a second shaft power therebetween, and electrically coupled to an electric battery; a motor-generator operatively coupled to the mechanical transmission for transmission of a third shaft power therebetween, and electrically coupled to the electric battery; a transfer gear box having a first input mechanically coupled to an output of the CVT, a second input mechanically coupled to the motor-generator, and an output mechanically coupled to the load; and a controller operatively coupled to the internal combustion engine, the controller being configured to adjust a relative proportion of the third shaft power compared to the first shaft power at least in part by adjusting at least one of a combustion timing of the internal combustion engine and an exhaust valve timing of the internal combustion engine.