High-pressure common rail fuel injector capable of achieving highly stable injection based on throttling damping accommodating effect

A high-pressure common rail fuel injector capable of achieving highly stable injection, comprising a fuel injector housing (20), a fuel pipe connector (13), an accumulator (15), a fuel chamber control valve (4), a pressure fluctuation absorption assembly (7), a control valve assembly (8) and a nozzle assembly (9), the accumulator (15) being installed in the fuel injector housing (20), and the fuel pipe connector (13) being installed above the accumulator (15);

• the fuel chamber control valve (4), the pressure fluctuation absorption assembly (7) and the control valve assembly (8) being installed in the fuel injector housing (20), and the nozzle assembly (9) being arranged below the control valve assembly (8);
• and the accumulator (15) being divided into a main accumulator chamber (14), an auxiliary accumulator chamber (16) and a fuel-return accumulator chamber (2);
• wherein the fuel chamber control valve (4) comprises an armature locating seat (408), a valve rod locating seat (411), a fuel chamber control valve armature (403) and a fuel chamber control valve rod (404);
• the fuel chamber control valve armature (403) being located in the armature locating seat (408), and installed on a top of the fuel chamber control valve rod (404), and a fuel chamber control valve coil (407) is arranged above the fuel chamber control valve armature (403);
• a fuel chamber control valve spring (402) is arranged in the fuel chamber control valve coil (407), and the fuel chamber control valve rod (404) penetrates through the armature locating seat (408), and extends into the valve rod locating seat (411);
• a valve rod fuel inlet line (409) and a valve rod fuel outlet line (410) are arranged in the armature locating seat (408), and the valve rod fuel inlet line (409) is connected with the main accumulator chamber (14) through a first fuel inlet line (18) and a first fuel inlet check valve (17);
• the valve rod fuel outlet line (410) is communicated with a second fuel inlet line (19), and an upper fuel chamber and a lower fuel chamber are arranged in the middle of the fuel chamber control valve rod (404);
• the upper fuel chamber is communicated with the lower fuel chamber through a valve rod fuel chamber (405);
• an auxiliary chamber fuel inlet line (406) is arranged in the valve rod locating seat (411);
• and the auxiliary chamber fuel inlet line (406) is connected with the auxiliary accumulator chamber (16) through a third fuel inlet check valve (5).