| 摘要 |
An ignition plug for use in an electric firing type internal combustion engine includes a hollow tubular main cell (210) a pair of electrodes (230) comprising a center electrode mounted in the hollow lower end of the main cell, and a ground electrode integrally formed in the lower end of the main cell in correspondence to the center electrode and a pre-combustion chamber (250) formed in the lower end of the main cell, for accommodating part of a fuel-air mixture and combusting the same, in order to fire and combust a remaining portion of the fuel-air mixture compressed in a combustion chamber within a shorter time using an explosive spark flame of a small scale which occurs when the part of the compressed fuel-air mixture is fired and combusted in advance at the time of an ignition time of the engine. The ignition plug includes a small pre-combustion chamber which can be integrated with or separated from the lower end thereof, and thus fires and combusts in advance a little amount of fuel-air mixture taken into the pre-combustion chamber during a compression stroke of the engine. Also, the fuel-air mixture can be combusted within a much shorter time than the conventional art. As a result, it is possible to use a lean mixture in the electric firing type internal combustion engine to thereby save fuel in use and enhance a combustion efficiency of the engine. Also, an exhaust gas harmful to the human body is reduced to thereby provide a merit of reducing a complex air pollution. |
