ALGONA, Iowa - While much of the world fumes over escalating fuel prices, a small company in north central Iowa is quietly hoping to make gasoline obsolete as an engine fuel. Research at the Hydrogen Engine Center Inc. is done in an early 1900s red brick armory at the Kossuth County fairgrounds. There, a clean six-cylinder engine that looks like it could have been pulled from a Ford pickup has been running for 110 hours, not quite half the 300 hours it must continuously run for certification. The company, led by a retired Ford Motor Co. engineer, hopes to meet...