The cell as needed to replace the wa ter lost through the electrolysis process. The hydrogen and oxygen are collected in chambers which are these two gases are supplied to a mixing chamber w here they are mixed in the ratio of two parts hydrogen to one part oxygen. This mixture of hy drogen and oxygen flows to another mixing chamber wherein it is mixed with air from the atmosphere. The system is disclosed as being installed in an car, and a dual control system, which is actuated by the car throttle, first meters the hydrogen and oxygen mixture into the chamber wherein it is combined with air and then meters the combined mixture into the ca r engine. The heat of combustion of a pure hydrogen and oxygen mixture is greater than that of a gasoli ne and air mixture of comparable volume, and air is therefore mixed with the hydrogen and oxygen to pr oduce a ...