Hydrogen generator for uses in a vehicle fuel system

1. A method for increasing the fuel efficiency of an internal combustion engine, the method comprising:

a) providing an electrolyzer for electrolyzing water into hydrogen gas and oxygen gas for use as an additive to the fossil fuels on which an internal combustion engine operates such as engines in motor vehicles, the electrolyzer comprising:

an electrolysis chamber, the electrolysis chamber having a removable cover serving as access means for performing routine maintenance to components in its interior space;

an aqueous electrolyte solution comprising water and an electrolyte, the aqueous electrolyte solution partially filling the electrolysis chamber such that a gas reservoir region is formed above the aqueous electrolyte solution;

two principal electrodes comprising an anode electrode and a cathode electrode, the two principal electrodes at least partially immersed in the aqueous electrolyte solution; and

one or more supplemental electrodes at least partially immersed in the aqueous electrolyte solution and interposed between two principal electrodes that are not connected to the anode or cathode with a metallic conductor wherein the two principal electrodes and the one or more supplemental electrodes are held in a fixed spatial relationship;

means for individually removing and replacing said principal electrodes and supplemental electrodes wherein the principal and supplemental electrodes are removably insertable and attached in a rack holding said electrodes in a fixed spatial relationship, said rack further comprising a retainer for securing the electrodes to the rack and said retainer further being removably attached to the electrolysis chamber; and

heat sink means for removing an excess heat generated by the electrolyzer, said means including a plurality of spaced-apart fins around at least a portion of the outside surface of the electrolysis chamber;

b) applying an electrical potential between the two principal electrodes wherein a gas mixture comprising hydrogen gas and oxygen gas is generated and collected in the gas reservoir region and wherein the electrolyzer is adapted to deliver the gas mixture to the fuel system of the internal combustion engine; and

c) combining the gas mixture with fuel in the fuel system of the internal combustion engine.

2. The method of claim 1 wherein the one or more supplemental electrodes are not connected to either of the two principal electrodes with a metallic conductor

3. The method of claim 1 wherein a first group of the one or more supplemental electrodes are connected to the anode electrode with a first metallic conductor and a second group of the one or more supplemental electrodes are connected to the cathode electrode with a second metallic conductor.

4. The method of claim 1 wherein the fixed spatial relationship is such that the two principal electrodes and the one or more supplemental electrodes are essentially parallel and wherein each electrode is separated from an adjacent electrode by a distance from about 0.15 inches to about 0.35 inches.

5. The method of claim 1 wherein the one or more supplemental electrodes are 1 to 50 supplemental electrodes.

6. The method of claim 1 wherein the one or more supplemental electrodes are each individually a metallic wire mesh, a metallic plate, or a metallic plate having one or more holes.

7. The method of claim 1 wherein the one or more supplemental electrodes are each individually a metallic plate having one or more holes.

8. The method of claim 1 wherein the one or more supplemental electrodes are each individually a metallic wire mesh.

9. The method of claim 1 wherein the two principal electrodes are each individually a metallic wire mesh, a metallic plate, or a metallic plate having one or more holes.

10. The method of claim 1 wherein the two principal electrodes are each individually a metallic plate.

11. The method of claim 1 wherein the electrolyte is a bicarbonate, a hydroxide, or mixtures thereof.

12. The method of claim 1 wherein the electrolyte is sodium bicarbonate, potassium hydroxide, sodium hydroxide, or mixtures thereof.

13. The method of claim 1 wherein the electrolyzer further comprises a pressure relief valve.

14. The method of claim 1 wherein the electrolyzer further comprises an outlet adapted to introduce the gas mixture into a fuel system of an internal combustion engine.

15. The method of claim 1 further comprising adjusting the operation of an oxygen sensor so that the oxygen sensor does not cause a fuel rich condition.

16. The method of claim 15 wherein the operation of the oxygen sensor is adjusted by an RC circuit, the RC circuit includes:

a resistor placed in series with the oxygen sensor's check engine light electrical line; and

a capacitor placed between the oxygen sensor's control line that monitors the amount of oxygen and the check engine light electrical line, wherein the capacitor is attached to the check engine electrical line at the opposite side of the resistor from where the resistor is in electrical contact with the oxygen sensor.