Fuel and air injector in engine suction duct - has annular air flow to central valve controlled fuel jet to produce thirty degree conical jet

摘要

The injection valve for a combustion engine with continuous fuel injection in the suction duct upstream of the inlet valve and external ignition has an annular air passage (1) between the valve edge (2) and a sleeve (3) surrounding it, the case having a central fuel outlet (4) controlled by a valve needle. The outlet (4) has an outwardly opening valve (5) through which the fuel jet emerges. The air is supplied at an air to fuel mass ratio of at least 6:1 suc that, in the region of max. fuel velocity, there is a conical fuel jet with an angle of approximately 30 deg..