Adaptive engine speed control system
AssigneeDeere & Company
InventorsZackary P. Sipper, Jacob C. Kallara, Brent G. Rinholm
Life of this patent
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Abstract
An adaptive engine speed control system for a grass mowing machine having an internal combustion engine, a hydrostatic traction drive circuit and a hydraulic mowing circuit for operating a plurality of cutting units. A controller provides a traction feedback output signal if the grass mowing machine is moving at an actual ground speed that is below a pedal based desired ground speed, and uses the traction feedback output signal to command the internal combustion engine to an increased speed above a pedal based engine speed control range.
Claims11
An adaptive engine speed control system, comprising:
- a PID controller commanding an internal combustion engine on a riding greensmower to run within [at] an adaptive engine speed control range having a higher engine speed for each pedal position than an engine mode with a pedal based engine speed control range if there is a feedback current output signal indicating at least one of a hydrostatic traction drive circuit and a hydraulic mowing circuit is operating below a desired speed from a feed forward current signal.
An adaptive engine speed control system, comprising:
- an internal combustion engine providing power for a selected mode from a plurality of engine [an] operating modes of a grass mowing machine within a pedal based engine speed control range for each mode;
- and
- a controller commanding the engine to run at an engine speed above the pedal based engine speed control range for the selected mode based on a traction feedback signal from a hydrostatic traction drive system.
An adaptive engine speed control system, comprising:
- a grass mowing machine having an internal combustion engine, a hydrostatic traction drive circuit and a hydraulic mowing circuit for operating a plurality of cutting units;
- and
- a controller that provides a traction feedback output signal if the grass mowing machine is moving at an actual ground speed that is below a pedal based desired ground speed in one of a plurality of operating modes;
- the controller using the traction feedback output signal to command the internal combustion engine to operate at a higher speed range above the [a] pedal based engine speed control range.
Dependencies are inferred from the claim text.