Method and apparatus to monitor an on-vehicle fluidic subsystem

A vehicle including a fluidic subsystem disposed thereon, comprising:

• an electric motor electrically connected to a motor driver and rotatably connected to a fluidic pump that is disposed in a fluidic circuit of the vehicle,
• a controller in communication with the electric motor, the motor driver and the fluidic circuit, the controller including an instruction set, the instruction set executable to:
• determine operating parameters associated with the fluidic subsystem;
• determine a plurality of power efficiency parameters for the fluidic subsystem based upon the operating parameters, wherein the power efficiency parameters include a hydraulic power efficiency, an electro-mechanical power efficiency and an electric power efficiency;
• determine a state of health for the fluidic subsystem based upon the power efficiency parameters;
• detect a fault in the fluidic subsystem when the state of health is less than a threshold state of health;
• and
• communicate the fault to a vehicle operator.

A method for monitoring a fluidic subsystem disposed on a vehicle, wherein the fluidic subsystem includes an electric motor electrically connected to a motor driver and rotatably connected to a fluidic pump that is disposed in a fluidic circuit, and the vehicle includes a telematics device, the method comprising:

• monitoring operating parameters associated with the fluidic subsystem;
• communicating, via the telematics device, the parameters associated with operation of the fluidic subsystem to a remote server;
• and
• determining, via the remote server, a plurality of power efficiency parameters for the fluidic subsystem based upon the operating parameters, wherein the power efficiency parameters include a hydraulic power efficiency, an electro-mechanical power efficiency and an electric power efficiency;
• determining, via the remote server, a state of health for the fluidic subsystem based upon the power efficiency parameters;
• detecting, via the remote server, a fault in the fluidic subsystem when the state of health is less than a threshold state of health;
• isolating the fault in the fluidic subsystem to one of the electric motor, the motor driver or the fluidic pump based upon the plurality of power efficiency parameters;
• and
• communicating the isolated fault to an on-vehicle controller.