The invention aims to provide a wide-range
methanol / diesel oil dual-fuel
injector with high injection stability, and belongs to the field of engines. A
methanol injection control multi-way
electromagnetic valve assembly is installed in the diesel oil connector body, a diesel oil injection control
electromagnetic valve assembly is installed in the
injector intermediate body, an oil way stop valve
assembly is installed in the cone valve body, multi-position nested
needle valve assemblies are installed in the inner
needle valve intermediate body and the
nozzle body, and a high-pressure
methanol connector is installed on the side of the methanol connector body. A high-pressure diesel connector is installed on the side of the diesel connector body. According to the methanol / diesel oil dual-fuel independent injection
system, methanol / diesel oil dual-fuel independent injection can be achieved, the methanol injection working condition range can be remarkably widened, the
injector needle valve response characteristic is improved, the oil return amount is reduced, and then the methanol injection stability is improved; and various injection
modes such as methanol micro-injection,
diesel injection and methanol large-flow shoe-shaped injection can be realized.