| 摘要 |
<p>The process, for use on an engine (1) with controlled ignition operating on natural gas, comprises passing methane-type hydrocarbons through an ionizer (2) when the temperature of the circulating exhaust gases is below a set threshold level and when the mixture is lean, and through a catalytic converter (3) when the temperature is above the set level. - The threshold temperature level is equivalent to the semi-conversion temperature for methane, and the process is controlled by a temperature sensor (5) ahead of the catalytic converter, an engine fuel injection regulator (7), and a valve (4) that switches the exhaust gas flow from the ionizer to the catalytic converter or vice versa</p> |
