| 摘要 |
PROBLEM TO BE SOLVED: To provide an engine capable of enhancing an ignitability improving effect. SOLUTION: The engine supplied with radicals in a combustion chamber is provided with: an intake valve 31 for opening/closing an intake port 30; a valve-timing adjusting device 200 for adjusting valve timing of the intake valve 31; a discharge unit 50 including a first electrode 51, a dielectric element 53 covering the first electrode 51, and a second electrode 52 arranged at a position to face the dielectric element 53, and constituted such that a discharge chamber 55 formed between the second electrode 52 and the dielectric element 53 faces a combustion chamber 13, thereby to generate an unbalanced plasma discharge in the discharge chamber 55; a voltage applying means 60 for applying voltage to the discharge unit 50 so that the radicals can be produced in the discharge chamber by the unbalanced plasma discharge; and a controller 70 for controlling the valve-timing adjusting device 200 so that an intake valve closing period for closing the intake valve 31 can be provided during the downward movement of the piston from an exhaust top dead center to an intake bottom dead center, thereby to diffuse the radicals in the discharge chamber into the combustion chamber. COPYRIGHT: (C)2010,JPO&INPIT |
