Diesel engine oil injector hold-down device

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engine accessories, in particular to a pressing device for a fuel injector of a diesel engine. Background technique [0002] The diesel fuel injector is a very critical part in the internal combustion engine, and the fuel injector needs to be fastened with a pressing block during installation. Unreasonable design will lead to loosening and tilting of the fuel injector, making the engine work unstable, and even causing a large number of quality accidents. At present, the fuel injector is mostly fixed by a briquetting block, and a bolt hole is arranged on the briquetting block, and the fuel injector can be fastened by the briquetting bolt passing through the bolt hole and a certain supporting point on the cylinder head. However, once the injector is finalized, its structure and size will basically not be changed due to the requirements of technology and cost. However, due to the struct...

AI Technical Summary

Problems solved by technology

However, due to the structure of the diesel engine cylinder head, the arrangement of the valves and the arrangement of the fuel injectors vary with the model, and due to the interference of the valve bridge and the rocker arm, it is difficult to arrange the supporting points of the pressure block on some cylinder heads, which may cause the cylinder head General layout plan failed

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