Ignition system for multi-valve engine

摘要

An ignition system for a multi-valve internal combustion engine wherein the valves all reciprocate about acute angles to a plane containing the cylinder bore axis and wherein a spark plug is positioned in a generally parallel extending direction to the plane and is offset slightly toward the side of the plane containing the most valves. A spark coil is affixed to the terminal end of the spark plug and is itself offset to the other side of the plane to nest between the two poppet valves and provide a compact, low volume combustion chamber and a compact, low height engine arrangement.