Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types

Child Classifications

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• F02B 69/02 for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel
• F02B 69/06 for different cycles, e.g. convertible from two-stroke to four stroke