Abstract: An apparatus and method for incorporating a feedback mechanism (24) into a train railcar wheel braking system (10) to regulate applied braking force. The feedback mechanism (24) provides information to an electronically controlled pneumatic braking system (10) sufficient to detect impending wheel slip or skid. Responsive to the wheel slip/skid information, a brake control processor (18) modulates the braking force applied to the train railcar wheel system to enable the braking system (10) to apply a braking force without damaging the railcar wheel system or rails over which the railcar wheels are traveling.

Abstract: A pressurized fluid system provides electrical power to a load and includes a fluid motor, a generator, an energy storage device and a controller. The system supplies fluid to the fluid motor, which provides a generator with power producing a voltage used to supply power to a load and provide energy to the energy storage device. The controller selects which of various sources within the system provides fluid to the fluid motor based on the operating mode of the system. When fluid supplied to the fluid motor is discontinued, the energy storage device discharges providing power to the load.