US 12,352,222 B2
Constant pressure fuel enhancement system and method
Morten Andre Lund, Bradenton, FL (US)
Assigned to EXEN HOLDINGS, LLC, Bradenton, FL (US)
Appl. No. 18/035,842
Filed by EXEN HOLDINGS, LLC, Bradenton, FL (US)
PCT Filed Nov. 8, 2021, PCT No. PCT/EP2021/080958
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/096718, PCT Pub. Date May 12, 2022.
Claims priority of provisional application 63/111,254, filed on Nov. 9, 2020.
Prior Publication US 2023/0417198 A1, Dec. 28, 2023
Int. Cl. F02C 3/22 (2006.01); F02C 3/20 (2006.01); F02C 7/22 (2006.01); F02C 7/236 (2006.01); F02D 19/06 (2006.01); F02D 19/08 (2006.01); F02D 19/10 (2006.01); F02M 37/00 (2006.01)
CPC F02D 19/081 (2013.01) [F02C 3/20 (2013.01); F02C 3/22 (2013.01); F02C 7/22 (2013.01); F02C 7/236 (2013.01); F02D 19/0605 (2013.01); F02D 19/0628 (2013.01); F02D 19/0644 (2013.01); F02D 19/0647 (2013.01); F02D 19/0671 (2013.01); F02D 19/10 (2013.01); F02M 37/0064 (2013.01); F05D 2210/13 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A fuel enhancement system, adapted to cooperate with an engine, a source of liquid fuel, and a source of gaseous component, for supplying the engine with a pressurized fuel mixture comprising a mixture of the liquid fuel and the gaseous component, where, in the operation of the engine, the engine uses a part of the fuel mixture supplied to the engine, and at least part of the fuel mixture supplied to the engine, but unused by the engine, flows out of the engine as return fuel, and the source of liquid fuel provides an amount of liquid fuel to the fuel enhancement system corresponding to the amount of liquid fuel used by the engine as liquid makeup fuel,
the fuel enhancement system comprising:
a variable pressure pump system, having an input and an output, responsive to control signals applied thereto, varying the pressure at its output relative to the pressure at its input by a variable amount in accordance with the control signals;
a metering device, disposed in fluid communication with the liquid fuel source up stream of the pump system input, for generating indicia of the flow of the liquid makeup fuel supplied to the fuel enhancement system during operation of the engine;
a flow control device, disposed in fluid communication with the gaseous component source and responsive to indicia of the flow of the liquid makeup fuel supplied to the fuel enhancement system during operation of the engine, for supplying a controlled flow of gaseous component having a flow corresponding to a desired proportion of the flow of the liquid makeup fuel supplied to the fuel enhancement system;
the pump system input being receptive of the metered liquid makeup fuel, the controlled flow of gaseous component, and at least part of the return fuel mixture from the engine;
the pump system cooperating with an infusion volume configured such that the fuel mixture that has flowed through the infusion volume has bubbles of the gaseous component distributed substantially uniformly throughout the mixture;
the engine being supplied with fuel mixture that has flowed through the infusion volume at a pressure established by the pump system; and
a control system, including at least one pressure sensing device, for generating control signals to the pump system such that the pressure of the fuel mixture supplied to the engine is maintained substantially at a predetermined pressure value.