IGNITION CONTROLLER USING SOLENOID FORCE DRIVEN TYPE SPARK PLUG

摘要

PURPOSE:To secure favorable ignitability for a lean air-fuel mixture, by installing the solenoid force driven type spark plug installed in a trigger electrode, in a space between base end parts of a pair of parallel electrodes, while making a relatively rich air-fuel mixture so as to be fed to the trigger electrode part by an auxiliary fuel feeding device. CONSTITUTION:A pair of sizable parallel electrodes 2 and 3 in length and a trigger electrode 4 is installed in a space between base end parts of both these electrodes 2 and 3 whereby an electrode driven type spark plug 1 is constituted. And, there are provided with a constant-current feeding device for producing main discharge between both these parallel electrodes 2 and 3 of this plug 1 and a trigger device for producing initial discharge between one parallel electrode 2 and the trigger electrode 4 and inducing the said main discharge, and the relatively rich air-fuel mixture is made so as to be fed to the vicinity of a position where the initial discharge is produced from an auxiliary fuel feeding device 28. With this constitution as aforesaid, the sparkler formed between the parallel electrodes 2 and 3 moves at high speed to a tip direction of these parallel electrodes 2 and 3 whereby ambient mixture is made so as to be successively ignitable.