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The utility model relates to High Pressure Common Rail Pump drive and connecting structure. Electronically controlled high pressure common rail pump fastened on the connecting plate, connecting plate is fastened to the gear chamber nakedness; I connect the disk to install the mounting hole into the eccentric stopper set, electronically controlled high pressure common rail pump output shaft extends into the front of the Land the mounting holes on the gear chamber opened lower body mounting holes, install only the connection port connector plate mounting hole on the lower body of the gear chamber; common rail pump drive gear mounted on the electronically controlled high pressure common rail pump output shaft and locks tightening nut, the center of the center of the mounting hole of the common rail pump drive gear eccentrically disposed; crankshaft timing gear mounted on the crankshaft, the crankshaft timing gear idler gear meshed with the large, large and small idler gear idler gear coaxially disposed and simultaneous rotation of the idler gear meshes with the small common rail pump drive gear. The utility model to ensure that electronically controlled high pressure common rail pump installation and reliable, smooth transmission, and a small footprint, does not affect the overall size of the engine.