Pump speed command generation algorithm for magnetorheological power steering coupling

A method for managing faults in a magneto-rheological hydraulic power steering (MRHPS) system, said method comprising:

• detecting a fault condition in the MRHPS system;
• selecting a safe mode from a plurality of predetermined safe modes based on the fault condition, wherein the plurality of predetermined safe modes include a normal operation mode, a engine speed follow mode, a manual mode, a fixed duty cycle mode and a voltage control mode;
• and
• applying the safe mode to manage the fault condition.

A method for determining an optimum speed of a power steering pump used in a magneto-rheological hydraulic power steering (MRHPS) system of a vehicle, wherein the power steering pump drives a steering gear used in the MRHPS system based on an input given to a steering wheel of the vehicle, said method comprising:

• determining an angle of rotation of the steering wheel;
• determining a rate of change of the angle of rotation of the steering wheel based on the angle of rotation of the steering wheel;
• determining a speed of the vehicle;
• and
• determining the speed of the power steering pump, wherein the speed of the power steering pump is determined using one or more arranged sets of data, wherein each of the one or more arranged sets of data is a representation of a set of values of speed of the power steering pump corresponding to a set of values of the angle of rotation of the steering wheel and the rate of change of the angle of rotation of the steering wheel, wherein each of the one or more sets of data corresponds to a predetermined range of the speed of the vehicle.