Patent ID: 7021290

Claim:
A fuel rail assembly for a fuel-injected spark-ignited internal combustion engine comprising: first and second fuel rails, each said fuel rail formed by a tube having a plurality of injector outlets, said first and second fuel rails comprising a first set of orifice outlets located at respective first ends of said rails and a second set of orifice outlets located at respective second ends of said fuel rails opposite said first ends, and one of said first and second fuel rails comprising a fuel inlet different from and located away from said first and second sets of orifice outlets, said fuel inlet being located intermediate said first and second ends of said one rail, said fuel inlet configured for receiving pressurized fuel directly from a low pressure fuel pump wherein said fuel has a pressure less than about 60 psi; first and second crossover conduits for communicating fuel between said fuel rails, said first crossover conduit located between said first set of orifice outlets of said first and second fuel rails, and said second crossover conduit located between said second set of orifice outlets opposite said first crossover conduit; and one of said first and second crossover conduits having at least one fluid flow restrictor at one of said crossover conduit connections for damping pressure pulsations within said rails and to balance flow therebetween and the other one of said first and second crossover conduits having an absence of said fluid flow restrictor.