A high-pressure oil pipe assembly

Abstract

The application relates to a high-pressure oil pipe assembly, which relates to the technical field of engines and related systems. It is installed on the cylinder head and includes a high-pressure oil pipe and a long bushing. The second pier head of the oil inlet hole of the oil inlet injector; the long bushing is set outside the part of the high-pressure oil pipe adjacent to the second pier head, and penetrates the oil return chamber of the cylinder head; the long bushing The sleeve includes a long liner head and a long liner body against the second pier head, the long liner head is sealingly connected with the oil pipe installation hole of the cylinder head, and the long liner head passes through the long liner The pipe body compresses and fixes the second pier head and the oil inlet hole. The high-pressure oil pipe assembly of the present application adopts an integrated high-pressure oil pipe, which has few types of parts and low assembly difficulty, and eliminates the hardness contradiction between the strength and sealing performance of the high-pressure oil pipe.

Description

technical field [0001] The present application relates to the technical field of engines and related systems, in particular to a high-pressure oil pipe assembly. Background technique [0002] In the high-pressure common rail fuel system, for the fuel injector connected internally, there needs to be communication between the common rail and the fuel injector. [0003] In the related technology, the traditional connection method between the common rail and the injector is to connect through a section of high-pressure oil pipe and a high-pressure connecting pipe; The end of the high-pressure connecting pipe is tightly connected with the oil inlet hole of the fuel injector; the high-pressure oil pipe is connected to the high-pressure connecting pipe through a union nut. [0004] However, the traditional connection method requires high-pressure fuel pipes, high-pressure connecting pipes, nuts and union nuts. There are many types of parts, complex structures, and difficult assemb...

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Problems solved by technology

[0004] However, the traditional connection method requires high-pressure fuel pipes, high-pressure connecting pipes, nuts and union nuts. There are many types of parts, complex structures, and difficult assembly. In addition, the oil pressure in the high-pressure common rail fuel system is high. The overall strength of the connecting pipe is high, and the closer the hardness is to the injector, the higher the requirement. The high-pressure fuel pipe interface is smaller than the high-pressure connecting pipe interface, and the high-pressure connecting pipe interface is smaller than the injector interface.

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