ENGINE WITH DIRECT INJECTION OF FUEL

摘要

An engine is described having a combustion chamber with one or more intake ports and an injector for directing a spray or jet of fuel directly into the combustion chamber. The injector (60) is arranged in an injector chamber (54) distinct from the engine intake port or ports and separated from the combustion chamber by a poppet valve (56) that closes to isolate the injector (60) from the the combustion chamber during part of the engine operating cycle. The injector (60) is opened only at times that the poppet valve (56) is open and the spray of the injector is arranged to pass through the orifice of the open poppet valve (56) without wetting the walls of the injector chamber (54).