Electrocontrolled common rail multi-fuel injector for engine

The utility model relates to an engine electric control common-rail multi-fuel injection device, comprising a mechanical hydraulic device and a control unit. The utility model is characterized in that the mechanical hydraulic device mainly comprises a high pressure common rail, a middle pressure common rail, a low pressure multi-communication connector, a hydraulic bumper and a three-way connector. The device is suitable for the injection requirements of alternative fuels such as dimethyl ether, vegetable oil, etc. in a cylinder on a diesel engine and is also suitable for the injection requirements of alternative fuels such as LPG, LNG, alcohol fuel, liquefied natural gas, etc. in and out of the cylinder of the diesel engine. The utility model is a novel injection device suitable for a plurality of fuels.