Fuel feeding system of micro diesel oil ignition direct-injection natural gas engine and control method thereof

The invention discloses a fuel feeding system of a micro diesel oil ignition direct-injection natural gas engine and a control method of the fuel feeding system. The fuel feeding system comprises an electronic control common rail ignition diesel oil feeding device and an electronic control common rail high-pressure direct-injection natural gas feeding device, wherein the electronic control common rail ignition diesel oil feeding device and the electronic control common rail high-pressure direct-injection natural gas feeding device are independently controlled through an electronic control system,the electronic control system supplies ignition diesel oil with certain pressure to the natural gas engine in an adjusting mode by having control over a diesel oil pressure adjusting module of the electronic control common rail ignition diesel oil feeding device according to the working condition of the natural gas engine, and the electronic control system supplies main jet natural gas with certain pressure to the natural gas engine in an adjusting mode by having control over a natural gas pressure adjusting module of the electronic control common rail high-pressure direct-injection natural gas feeding device according to the working condition of the natural gas engine.Injection pressure of the ignition diesel oil and jet pressure of the main jet natural gas are controlled through the electronic control system, and the purpose of quick low-emission efficient combustion of the engine is achieved.