Inlet or outlet openings being timed asymmetrically relative to bottom dead-centre

Full Title

Engines characterised by using fresh charge for scavenging cylinders > Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18 > Inlet or outlet openings being timed asymmetrically relative to bottom dead-centre