| 摘要 |
An internal combustion engine (100) comprises an intake valve (31) which opens and closes an intake port (30), a valve timing adjustment device (200) which adjusts a valve timing of the intake valve (31), a discharge portion (50) including a first electrode (51), a dielectric (53) covering the first electrode (51), and a second electrode (52) disposed at a position facing the dielectric (53), where a discharge chamber (55) formed between the second electrode (52) and the dielectric (53) is configured so as to face the combustion chamber (13) and a non-equilibrium plasma discharge is generated in the discharge chamber (55), a voltage impressing means (60) which impresses a voltage to the discharge portion (50) such that the radicals are produced in the discharge chamber (55) by the non-equilibrium plasma discharge, and a controller (70) which controls the valve timing control device (200) to close the intake valve (31) in an intake valve close period in which a piston lowers from an exhaust top dead center to an intake bottom dead center so as to diffuse the radicals in the discharge chamber (55) into the combustion chamber (13). Thereby, an ignition performance improvement effect of the internal combustion engine (100) can be enhanced.
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