Patent ID: 8897943
Filing Date: 2014-11-25
Classification: A01D,B60K,B60W,B60Y,Y02T,Y10S

Abstract:
1. A hybrid drive system for a combine, comprising: an engine driving an output; an engine control which produces a current engine load signal and an engine speed signal; a battery pack; a motor and a generator operatively connected to the output arranged to be used alternately, the motor usable to drive the output and the generator usable to be driven by the output; a motor/generator control that is signal-connected to the motor and to the generator to control operation of the motor and generator; a hybrid system control; and wherein the hybrid system control receives a battery pack state-of-charge (SOC) signal from the battery pack, and the hybrid system control also receives the current engine load signal and current engine speed signal from the engine control, and depending upon the SOC signal, the current engine load signal and the current engine speed signal, sends a torque command to the motor/generator control to provide a desired composite speed-torque curve from the engine and the motor; wherein the engine control governs engine speed at a selected isochronous speed.