An engine with this name is known for use in aviation. No more details at the moment. Later in an Appendix there will be some more information.

From Appendix 6: In the main text the existence of this engine is announced without further data.

-Now we have obtained a photograph of the inventor, Julius Dusevoir from San Leandro, California, holding the engine.

“Julius Dusevoir with his engine” (PiP = ps)

-It is a horizontally-opposed twin-cylinder. Its announced weight is 130 pounds. The crankshaft has roller bearings and is air cooled.

-According to Julius, it can be disassembled and assembled with two tools only. (Info Popsci-PeT).