Features of main control computer for a power machine
AssigneeClark Equipment Company
InventorsKenneth A. Brandt, Scott R. Rossow
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a computer based control system for controlling hydraulic and electromechanical actuators on a power machine, such as a skid steer loader. The computer based control system is configured to implement a number of features to enhance certain operational aspects of the power machine.
Claims8
A power machine control system for a power machine having an engine, a hydraulic power system providing hydraulic fluid under pressure, and a hydraulic actuator, the control system comprising:
- an engine speed sensor for sensing a speed of the engine;
- a proportionally controllable valve controllably coupling the hydraulic fluid under pressure to the hydraulic actuator;
- and
- a controller coupled to the engine speed sensor and the valve, providing a modulated control signal to the valve and configured to vary the modulated control signal based on engine speed, wherein the modulated control signal has a variable duty cycle and wherein the controller is configured to vary the duty cycle based on the sensed engine speed.
A power machine control system for a power machine having an engine, a traction system coupled to the engine to move the power machine, a hydraulic power system providing hydraulic fluid under pressure, the control system comprising:
- a user actuable speed select input providing a speed select signal indicative of a request to operate at a selected one of a plurality of speeds, the speed being determined based on a position of a hydraulic speed valve providing hydraulic fluid under pressure to the traction system;
- a controller coupled to the speed select input and providing a modulated output signal to operably control the speed valve to transition from a first position associated with a first speed to a second position associated with the selected speed, based on the speed select signal.
Dependencies are inferred from the claim text.