Spark/ignition system for an opposed piston engine

A four-stroke opposed-piston engine comprising:

• a cylinder having a periphery;
• a first piston and a second piston opposed to said first piston, each piston contained within said cylinder, said first piston containing a first shaped piston face, and said second piston containing a second shaped piston face;
• a combustion chamber defined by said first shaped piston face, and said second shaped piston face in opposition to said first shaped piston face, within said cylinder, where said combustion chamber comprises a fuel-rich predetermined region;
• and
• a non-rotatable electrical delivery, ignition system fixed to said cylinder periphery and at least partially contained within said combustion chamber, wherein said ignition system comprises one or more first spark plugs located at first positions on the periphery of the cylinder, and, one or more second spark plugs located at second positions on the periphery of the cylinder, and where at least one of said first or second spark plugs comprises a shielded center electrode and at least one other of said first or second spark plugs comprises a negative electrode, wherein the center electrode is downwardly positioned at an approximate 45-degree orientation from the at least one other spark plug comprising the negative electrode, wherein during combustion, said ignition system is adapted to generate ignition within the fuel-rich predetermined region of the combustion chamber.