Patent ID: 9338940
Filing Date: 2016-05-17
CPC Classification: A01D

Claim Text:
1. A drive system of a self-propelled machine incorporating engine stall protection, the drive system comprising: an engine in communication with a control unit, the engine configured for transmitting power and an engine load signal to the control unit; an actuation mechanism that is selectively actuatable by an operator to assign a desired ground speed of the self-propelled machine, the actuation mechanism being in communication with the control unit and configured to transmit a control signal to the control unit corresponding to the desired ground speed; and a transmission motor in communication with the control unit and configured to propel the self-propelled machine along a ground surface; wherein the control unit is configured to control the transmission motor to achieve an actual ground speed of the self-propelled machine along the ground surface based on both the control signal and a transmission motor current setpoint corresponding to a stall protection factor associated with the engine load signal that is determined by the control unit from a stall protection lookup table.