Combustion assist device for internal combustion engine

A combustion assist device for an internal combustion engine provided with a fuel injector for injecting at least a portion of fuel into an intake manifold,

• the combustion assist device comprising:
• an electrode element which is provided in the intake manifold and to which a high frequency high voltage is applied, wherein
• the electrode element includes:
• a dielectric material plate which has a first surface and a second surface, which is a surface on an opposite side to the first surface, the dielectric material plate dividing a portion of the intake manifold into a first flow path on a side of the first surface and a second flow path on a side of the second surface,
• a first metal conductor which is a metal conductor provided on the first surface,
• a second metal conductor which is a metal conductor provided on the second surface, and
• wherein the electrode element is disposed at a position directly reached by at least a portion of unevaporated fuel of the fuel injected from the fuel injector.