Abstract: An additive injection system includes an additive injection controller operable to: (a) receive fuel data; (b) determine, from the fuel data, a total fuel amount corresponding to a total volume of fuel present in a fuel tank; (c) determine an untreated fuel amount corresponding to a delivered volume of untreated fuel delivered into the fuel tank, the untreated fuel amount determined based on the total fuel amount and a treated fuel amount corresponding to an expected volume of treated fuel expected to be present in the fuel tank; and (d) in response to determining that the untreated fuel amount exceeds an injection threshold, generate an injection signal to initiate injection of fuel additive into a fuel stream of untreated fuel being delivered into the fuel tank via the fuel tank inlet.

Abstract: An additive injection system includes an additive injection controller operable to: (a) receive fuel data; (b) determine, from the fuel data, a total fuel amount corresponding to a total volume of fuel present in a fuel tank; (c) determine an untreated fuel amount corresponding to a delivered volume of untreated fuel delivered into the fuel tank, the untreated fuel amount determined based on the total fuel amount and a treated fuel amount corresponding to an expected volume of treated fuel expected to be present in the fuel tank; and (d) in response to determining that the untreated fuel amount exceeds an injection threshold, generate an injection signal to initiate injection of fuel additive into a fuel stream of untreated fuel being delivered into the fuel tank via the fuel tank inlet.

Abstract: A meter calibration apparatus includes a fluid intake conduit, a fluid discharge conduit, and a calibration cylinder connected in fluid communication with the intake and discharge conduits, the calibration cylinder defining a chamber. The apparatus further includes a piston slidable within the cylinder and defining first and second chamber portions on opposite sides of the piston, and at least one valve having an intake port in fluid communication with the intake conduit, a first flow port with a first flow conduit extending therefrom and connected to the first chamber portion for providing fluid communication therebetween, and a second flow port with a second flow conduit extending therefrom and connected to the second chamber portion for providing fluid communication therebetween.