NOVELTY - The system has an electrolyzer (100) which contains an electrolyte and a gas outlet. An enclosure encloses the electrolyzer and portion of the gas outlet. A radiative element (444) is within the enclosure and outside the electrolyzer. A safety switch closes an electrical circuit (400) to provide power to the electrolyzer when heated by the radiative element.    USE - Intrinsically safe electrolysis system for generating gaseous fuel supplements for engine.    ADVANTAGE - The electrolysis system can minimize the risk of explosion. The flame arrestor can be installed to fill space above the electrolyte in the path of the outlet tube to prevent gases in the electrolyzer from ignited by heat or flame generated within a connected engine manifold. The flame arrestor can be installed at the end of the shroud to prevent gases in the enclosure from ignited by the radiative element. The energy efficiency can be achieved by reducing the electrode over potentials and the electrolyte resistance between the electrodes. The energy efficiency can also be achieved by reducing the resistance of the electrode gap and avoiding the use of pumps, fans, and other auxiliary items. The volume and mass can be reduced by using intrinsically high surface area electrodes of high electrocatalytic activity and avoiding the pumps, fans, and other auxiliary items. The minimization of volume and mass can be obtained by overall reduction in manufacturing, shipping, and handing costs. An alkaline electrolyzer can remain relatively unaffected by traces of impurities in water and operate on unfiltered tap water for very long periods. The safety can be based on developing an apparatus by using excellent design principles, including specifications for high quality materials for the electrolyzer, fittings, and enclosures, and that minimizes the number of fittings, connectors, and pipes. The other safety can be obtained by placing the electrolyzer within an outer container or enclosure, so that the extension that covers the gas outlet pipe to a bulkhead, such as the firewall under the hood of an automobile or the wall of an automobile trunk. The other safety can be obtained by scavenging any stray gas as soon as it leaks to prevent a potentially explosive accumulation, preventing operation of the electrolyzer when the unit for scavenging leaked gas is not operable, detecting the presence of hydrogen and prevent the operation of the electrolyzer when a hydrogen leak is detected and ventilating the space containing the electrolyzer before, during, and after electrolysis, either on a timed basis or in response to a signal received from a detector that indicates the presence of hydrogen. The electrodes can be fabricated from a porous material through which the electrolyte can readily flow and which allows an easy escape path for the bubbles of gas. The ignition of the gasses occurs to minimize the energy of the explosion in the flame arrestor.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for intrinsically safe electrolysis system for generating hydrogen gas.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic diagram of the intrinsically safe electrolysis system.    Electrolyzer (100)    Electric circuit (400)    Radiative element (444)    Cut off switch (446)    Power supply (448)