Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture (adding secondary air to fuel-air mixture F02M23/00; adding exhaust gases F02M26/00; fuel-injection apparatus operating simultaneously on two or more fuels or on a liquid fuel and another liquid F02M43/00)

Child Classifications

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• F02M 25/022 Adding fuel and water emulsion, water or steam
• F02M 25/06 adding lubricant vapours
• F02M 25/08 adding fuel vapours drawn from engine fuel reservoir
• F02M 25/10 adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone
• F02M 25/14 adding anti-knock agents, not provided for in subgroups F02M25/022 - F02M25/10