Patent ID: 7377266

Claim:
An integrated fuel injection apparatus comprising a driving member, a plunger pump driven by said driving member, a fuel injection member, a fuel intake member and a fuel return member, with a return passage always communicating the fuel intake member with the fuel return member, with some of the fuel in the return passage being ejected via the fuel injection member under the action of the plunger pump, characterized in that the driving member comprises a solenoid, a sleeve and a motion part which can reciprocate in the sleeve driven by the magnetic force of the solenoid, the aforesaid motion part reciprocating in a flow difference generating mode in the aforesaid return passage, thereby making the fuel flow from the fuel intake member to the fuel return member, wherein the motion part comprises an armature, and an armature passage serially communicating with the aforesaid return passage, wherein the flow area of the armature passage at the intake in fuel return direction is equal to or larger than that at the outlet thereof.