US Patent 7140830 Electronic control system for skid steer loader controls

An electronic control system for a machine having a boom assembly and an implement assembly. A microprocessor is provided having an input and generating first and second output signals. A first electrohydraulic valve is connected to receive the first output signal from the microprocessor, and connected to position the boom assembly in response to the first output signal. A second electrohydraulic valve is connected to receive the second output signal from the microprocessor, and connected to position the implement assembly in response to the second output signal. A boom position sensor is disposed on the boom assembly or the implement assembly and connected to send a boom position input signal to the microprocessor, the microprocessor being connected to receive the boom position input signal and generate at least one of the first output signal and the second output signal, thereby controlling a position of the implement assembly relative to the boom assembly.