Fuel injector designed to reduce fuel vaporization

Claim 1

A petrol injector for delivering fuel to an air inlet manifold of an engine, the injector comprising an outer hollow body, a core member extending within the body, the body and core member being formed from magnetic material, a solenoid winding surrounding the core member, a seat ring defining an outlet orifice, the seat ring being mounted in one end of the body in spaced relationship to one end of the core member, a plate valve member formed from magnetic material located between the seat ring and said one end of the core member, a passage extending between the ends of the core member, the other end of the core member defining a fuel inlet, a coiled compression spring located in said passage, one end of the spring engaging said valve member to urge the valve member into sealing engagement with said seat ring, a spring abutment mounted in said passage at a position remote from said valve member, said abutment being engaged by the other end of said spring, and a tubular member extending within said spring, said tubular member being mounted on said abutment and acting to convey fuel from said fuel inlet to adjacent said valve member when said solenoid is energized to lift the valve member from said seat ring.