Patent ID: 8205331
Filing Date: 2012-06-26
Classification: F02B,F02P,Y10T

Abstract:
1. In an aircraft designed for use with an existing air cooled spark ignited piston engine having a first stated engine total displacement volume and a rated maximum horsepower, said existing aircraft engine mechanically designed for operation using a rich air fuel mixture ratio for normal takeoff, full power, or high power operation, and combusting said fuel to produce emissions comprising water, and carbon dioxide, said engine utilizing a plurality of cylinders, fuel injectors, and a compressor to increase the pressure of combustion air entering said cylinders to a first pressure level consistent with said design maximum rated horsepower, the improvement comprising substitution of said existing engine with a replacement, or a reconfigured, or a rebuilt spark ignited air cooled piston engine configured for full time lean run during normal operations, said normal operations comprising takeoff, climb, and cruise flight conditions, said full time lean run air cooled engine having a second stated engine total displacement volume and a selected maximum horsepower, and mechanically designed for operation using a lean air fuel mixture ratio, said full time lean run engine comprising a plurality of cylinders, fuel injectors, and a compressor to increase the pressure of combustion air entering said cylinders to a second pressure level wherein said full time lean run air cooled engine is capable of providing at least said selected maximum horsepower, and wherein said selected maximum horsepower exceeds about 92% of said rated maximum horsepower.