Air-assisted jet flame ignition device and ignition method thereof

An ignition method comprising:

• defining a first turn-on time of a fuel injector of an ignition device as a fuel injection pulse width;
• defining a second turn-on time of an air injection valve of the ignition device as an air injection pulse width;
• turning on the fuel injector according to the fuel injection pulse width to inject fuel;
• determining a delay time according to a fuel injection amount, wherein the delay time is called an air injection delay;
• turning on, according to the air injection pulse width, the air injection valve after reaching the air injection delay to inject air to obtain a premixed fuel-air mixture;
• injecting, by the air injection valve, the premixed fuel-air mixture into a prechamber cavity body of the ignition device;
• and
• igniting, by a spark plug of the ignition device, the premixed fuel-air mixture to inject flame jets.

A fuel-air premixing component comprising:

• a fuel injector comprising a nozzle, wherein the nozzle comprises a lower end surface;
• an air injection valve comprising an air inlet, wherein the air inlet comprises an upper end surface;
• a premixing sleeve comprising a first inner wall surface;
• a premixing sleeve inner core placed in the premixing sleeve and comprising:
• a sidewall;
• a through hole located on the sidewall;
• a second inner wall surface, wherein the second inner wall surface, the lower end surface, and the upper end surface are configured to form a premixing cavity, and wherein the premixing cavity coupled to the premixing sleeve inner cavity via the through hole;
• and
• an outer wall surface, wherein the first inner wall surface and the outer wall surface are configured to form a premixing sleeve inner cavity;
• and
• a fuel injector fastening bolt.