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US 6,397,826 B1Granted
Fuel cooling system for fuel emulsion based compression ignition engine
AssigneeClean Fuel Technology, Inc.
InventorGerald N. Coleman
Life of this patent
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Abstract
The present invention improves operation of a compression ignition engine using a fuel emulsion. Fuel emulsions tend to separate at high temperatures and pressures as a surfactant in the emulsion looses its effectiveness. The present invention employs a fuel cooling device to reduce the fuel emulsion temperature before returning the fuel emulsion to a fuel tank.
Claims13
A fuel emulation injection system for an internal combustion engine comprising:
- a fuel tank;
- a fuel rail having a supply side and return side, said supply side being fluidly connectable with said tank;
- a fuel injector being fluidly connectable with said fuel rail;
- a fuel return line being fluidly connectable intermediate said return side and said fuel tank;
- a pressure-activated fuel cooling device being fluidly connectable with said fuel return line said fuel cooling device adapted to reduce a temperature of a fuel emulsion below some prescribed temperature.
2 more elements
A method of preventing dissolution of a fuel emulsion in a pressurized fuel system for a compression ignition engine comprising the steps of:
- cooling the fuel emulsion returning from a fuel injector to a temperature below a prescribed temperature prior to a expanding step;
- expanding said fuel emulsion to a pressure of a fuel tank;
- sensing a fuel emulsion pressure in a fuel return line downstream from an expansion device;
- and
- calculating said prescribed temperature according to said sensed pressure.
2 more elements
Dependencies are inferred from the claim text.