Patent ID: 7913664

Claim:
A fuel control system for controlling delivery of a primary and an alternate fuel to an internal combustion engine of a vehicle via dedicated flow cells to prevent cross-contamination of primary and alternate fuel sources before blending, comprising: a primary fuel flow controller that controls delivery of the primary fuel from a primary fuel source to a primary fuel flow path; an alternate fuel flow controller that controls delivery of the alternate fuel from an alternate fuel source to an alternate fuel flow path; an electronic controller coupled to the primary fuel flow controller and the alternate fuel flow controller, wherein the electronic controller is adapted to control the primary fuel flow controller to control delivery of the primary fuel in the primary fuel flow path to a primary fuel flow cell and control the alternate fuel flow controller to control delivery of the alternate fuel in the alternate fuel flow path to an alternate fuel flow cell; wherein the primary fuel flow cell comprises: a first inlet port adapted to receive the primary fuel from the primary fuel flow path; a first outlet port adapted to supply the primary fuel inside the primary fuel flow cell to an engine for consumption; and a first bypass inlet port adapted to receive excess primary fuel previously received from the first outlet port that was not consumed by the engine, such that the excess primary fuel is not returned to the primary fuel source; and wherein the alternate fuel flow cell comprises: a second inlet port adapted to receive the alternate fuel from the alternate fuel flow path; a second outlet port adapted to supply the alternate fuel inside the alternate fuel flow cell to the engine for consumption; and a second bypass inlet port adapted to receive excess alternate fuel previously received from the second outlet port that was not consumed by the engine, such that the excess alternate fuel is not returned to the alternate fuel source; wherein the primary fuel from the primary fuel flow cell and the alternate fuel from the alternate fuel flow cell are mixed at the engine.