Portable fluid pump

A portable fluid pump adapted to be mounted onto a vehicle or trailer, the portable fluid pump comprising:

• a tank for storing fluid;
• a positive displacement pump comprising a fluid inlet and a fluid outlet, wherein the fluid inlet is connected to the tank to receive the fluid from the tank, and wherein the positive displacement pump is configured to pump the fluid out of the fluid outlet and through a hoseline connected to the fluid outlet to be expelled onto a fire;
• at least one electric motor that operatively drives the positive displacement pump, wherein the electric motor is a brushless variable speed electric motor configured to operate at 110 volts or less;
• a conduit configured to divert fluid pumped by the positive displacement pump back into the tank, wherein the conduit is provided with an actuated valve assembly adapted to vary a flow rate of the proportion of the fluid diverted through the conduit and, therefore, vary a resultant pressure of fluid pumped through the hoseline by the positive displacement pump;
• a pair of sensors configured to measure, respectively, a pressure and a flow rate of the fluid pumped through the hoseline by the positive displacement pump;
• a system controller operatively connected to the electric motor, to the actuated valve assembly, to the sensors and to a control device, wherein the system controller is configured to:
• receive from the control device a target fluid pressure and a target fluid flow rate for the fluid pumped through the hoseline;
• and
• adjust a throttle position of the actuated valve assembly and a rotational speed of the electric motor to adjust independently, respectively, the resultant pressure and the flow rate of the fluid pumped through the hoseline such that pressure and flow rate readings received by the system controller from the sensors substantially match, respectively, the target fluid pressure and the target fluid flow rate.