Fluid proportioning system with feedback

Abstract

A fluid delivery system includes a pump, a pressure sensor, and a controller. The pump is configured to pump fluids from a fluid reservoir. The pressure sensor is configured to measure a fluid pressure level at a fluid inlet of the pump. The fluid is drawn into the pump via the fluid inlet. The controller is configured to receive fluid pressure level measurements from the pressure sensor. The controller is configured to control a flow rate of the pump. The controller is operable to derive whether a pump chamber of the pump is completely filling with each pump cycle at the selected flow rate by comparing the fluid pressure level measurements to a fluid pressure signature for the pump.

Dependencies are inferred from the claim text.