Patent ID: 7237527

Claim:
A fuel injector for spraying fuel into a combustion chamber of a spark ignition engine, comprising a head which has a free outer face and which is provided with at least one main orifice designed to spray a fuel jet in a main direction and at least one secondary orifice designed to spray a fuel jet in a secondary direction, said main and secondary orifices opening into said outer face, and a common injection chamber internal of said head and communicating directly with said main and secondary orifices, said injection chamber being selectively placed in communication with a supply chamber, wherein said secondary direction forms an angle α between 10° and 80°, with said main direction so that said secondary jet intercepts said main jet in a burst zone which starts at a distance d, measured in said main direction from said outer face of said head, of between 1 and 15 mm, and wherein said flow rate of said secondary jet is between 80% and 100% of said flow rate of said main jet.