Abstract: A fuel additive injection system includes a fluid additive supply tank, a fluid additive quantity sensor, a flowmeter, remotely controllable valves and a controller including a microcontroller, a visual display and a keypad interface for establishing operation of the system to blend or inject a fuel additive for an internal combustion engine on a vehicle or a stationary apparatus. A quantity of a particular fuel additive to be injected may be selected based on a predetermined amount of fuel added to one or more fuel tanks. The system may keep records of fuel consumption and may utilize pressure air from a source driven by an engine or additive may be injected utilizing a motor driven pump as part of the additive injection system.

Abstract: A method for controlling an additive blending process includes determining the volume of main product and blending an amount of additive thereto to obtain a predefined ratio of additive to main product. The method includes the step of creating a non-volatile record of each significant event which occurs during blending operations and includes an extensive error checking and safety regime. A controller for accomplishing this method includes the ability to blend multiple additives simultaneously and with different types of blending systems such as piston injectors and streaming. The controller monitors status signals from the system and removes enabling signals from various components to effect a safe shut down in the event of an error condition being detected.