Drive systems and methods for implementing engine stall protection in a self-propelled machine

摘要

Drive systems and methods for implementing engine stall protection in a self-propelled machine are disclosed. In one aspect, a drive system of a self-propelled machine incorporating engine stall protection includes an engine being in communication with a control unit and transmitting power and an engine load signal to the control unit. An actuation mechanism can be actuatable to assign a desired ground speed of the self-propelled machine, the actuation mechanism being in communication with the control unit and transmitting a control signal corresponding to the desired ground speed to the control unit. In some aspects, the control unit is configured to control a transmission motor to achieve an actual ground speed of the self-propelled machine based on both the engine load signal and the control signal. In other aspects, the engine load signal is an engine speed signal, wherein engine speed is dependent on a load applied to the engine.

主权项

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.