Fully variable oil pump of engine

A fully variable oil pump of an engine belongs to the technical field of engine power systems. The sliding block serving as a stator is arranged in the pump cavity and arranged on the outer side of the rotor in a sleeving mode, the sliding block can rotate around the rotating pin to be installed on the pump body, a pre-compressed spring is arranged between the end, away from the rotating pin, of the sliding block and the pump body, and the initial position of the sliding block is jacked to the maximum eccentricity by the elastic force of the sliding block spring. The proportional electromagnetic valve is installed on a feedback oil way arranged on the pump body, the pressure and flow of engine oil in the feedback oil way are controlled by adjusting the duty ratio of the proportional electromagnetic valve, and therefore the eccentricity of the sliding block and the transmission shaft is controlled. By adjusting the duty ratio of the proportional electromagnetic valve on the feedback oil way of the engine oil p