Bombardier Motor Corporation of America

Matthew L Bridge

Gregory J Binversie

Richard M McChesney

An engine system having a low EMI/RFI signature. The system comprises a two-stroke engine having a cylinder with a piston sized for reciprocal motion through the cylinder. The two-stroke engine further includes an injector deployed in communication with the combustion chamber to discharge a fuel into the combustion chamber. An electronic control unit controls the injection and ignition for the engine, and an EMI/RFI reduction system is utilized to lower the electromagnetic and radio frequency interference signature of the engine.

Low signature EMI/RFI engine

A fuel injected, internal combustion engine that is protected from detrimental ignition due to pocket sparking. The engine includes one or more cylinders into which fuel is injected by an injector. A spark plug is used to ignite the fuel-air mixture within the cylinder. The spark plug is designed with a base and a shell extending from the base to define a hollow interior. A central electrode is disposed in an insulative core and extends through the hollow interior of the shell. The shell is connected to a secondary electrode. A gap is formed between the electrodes for promulgation of a spark to ignite the fuel-air mixture. The detrimental effects of pocket sparking are eliminated by placing a closure member between a terminal end of the shell and the nose of the insulative core. This closure member may be in the form of a lip that extends from the shell into proximity with the nose of the insulative core.

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Pleasant Prairie, WI, United States of America

Matthew L Bridge