Abstract: A fuel injection valve assembly has a construction less expensive in production and applicable for automated assembling. A cylindrical stem portion of a movable core is movably arranged within a movable core guide bore with opposing the rear end thereof with a tip end of a cylindrical core portion of a stationary core and opposing a conical valve head portion to a valve seat. A movable core spring is arranged between the movable core and an inner collar which is arranged within a fuel passage of the housing in pre-loaded fashion. A valve head portion is seated on the valve seat and a gap corresponding to a fully open stroke of said movable core is defined between the rear end of the movable core and the tip end of the cylindrical core portion.

Abstract: A fuel injection system includes a vane-type fuel pump. The fuel pump has a first bypass passage with a first pressure relief valve for relieving pressurized fuel from a discharge passage downstream of a check valve to the discharge passage upstream of the check valve so that excess pressure in the discharge passage downstream of the check valve can be relieved to the discharge pressure upstream of the check valve. Therefore, fuel leakage through a fuel injection valve can be prevented for avoiding possibility of formation of overrich mixture even upon hot start condition.