F02B 19/1071

Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder {with only one pre-combustion chamber pre-combustion chamber and cylinder being fed with fuel-air mixture(s) pre-combustion chamber having only one orifice,(i.e. an orifice by means of which it communicates with the cylinder); the intake system comprising two distinct intake conduits}