The invention belongs to the technical field of accessories of internal
combustion engines, and particularly relates to a
diesel engine oil
injector hold-down device. A supporting plate is fixed on a
cylinder head boss, a press block is arranged on the supporting plate, a vertical surface of the oil
injector is clamped by an opening end of a clamp part of the press block, an arc bottom surface of the clamp part is pressed on a pressurizing surface of the oil
injector, an arc groove of the bottom surface of the press block contacts with a supporting ball head on the supporting plate, and the press block presses the oil injector on an oil injector mounting hole by the aid of the opening end of the clamp art around the supporting ball head under action of press block bolts. The problems that position selection range is small and interference among parts is easy to be caused due to the fact that a press block fulcrum is arranged on a
cylinder head in the prior art are solved, the space of the
cylinder head is utilized sufficiently, and the supporting plate with the supporting ball head is mounted on the cylinder head. Besides, the supporting plate is flexible in
shape design and mounting, the cylinder head can be designed freely, and components closely related with economy, dynamic property and emission performance of engines are easy to be arranged on the cylinder head, so that the integral performance of the engine can be improved conveniently. The
diesel engine oil injector hold-down device is suitable for cylinder heads of diesel engines in different types.