Internal and external double-rail split cavity type high-pressure common-rail pipe

A high-pressure common rail and cavity separation technology, applied in the field of common rail tubes, can solve problems such as difficulty in starting the engine, and achieve the effects of simple structure, increasing the number of superpositions, and suppressing pressure fluctuations

Active Publication Date: 2019-11-22
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the internal volume of the high-pressure common rail pipe is too large, it can reduce the pressure fluctuation of the high-pressure fuel, but it will cause difficulty in starting the engine; The characteristics of the demand are determined and cannot be changed

Method used

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  • Internal and external double-rail split cavity type high-pressure common-rail pipe
  • Internal and external double-rail split cavity type high-pressure common-rail pipe
  • Internal and external double-rail split cavity type high-pressure common-rail pipe

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...

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Abstract

The invention provides an internal and external double-rail split cavity type high-pressure common-rail pipe. The internal and external double-rail split cavity type high-pressure common-rail pipe comprises an external complete rail, and a high-pressure common-rail cavity is formed in the external complete rail. Multiple high-pressure outlets communicating with the high-pressure common-rail cavityare formed in the surface of the external complete rail. Multiple segmented internal rails are arranged in the high-pressure common-rail cavity. The interiors of the multiple segmented internal railscommunicate to form an internal through cavity, and an external annular cavity is formed between the outer side of each segmented internal rail and the inner side of the external complete rail. The external annular cavities communicate with the internal through cavity, and each external annular cavity corresponds to one high-pressure outlet. A high-pressure sealing part is arranged at the open end of the high-pressure common-rail cavity. The internal and external double-rail split cavity type high-pressure common-rail pipe has the advantages that the structure is simple, and processing is convenient; segmented internal rail design is adopted, and cylinder extending is convenient; and meanwhile by means of internal and external double-rail split cavity type design, the superposition frequency of high-pressure liquid pressure waves is increased, and pressure fluctuation of high-pressure liquid in the common-rail cavity can be effectively inhibited.

Description

technical field [0001] The invention belongs to the technical field of common rail pipes, and in particular relates to a high-pressure common rail pipe with inner and outer double rails and separate chambers. Background technique [0002] The high-pressure common rail oil supply system is a new technology developed for diesel engines facing the stringent emission requirements in the future, which is of great significance for reducing vehicle emissions and preventing environmental pollution. The high-pressure common rail system is mainly composed of three parts: the high-pressure oil pump, the common-rail pipe and the fuel injector. The high-pressure common-rail pipe is a hollow long tubular metal body. Its function is to store the high-pressure fuel provided by the high-pressure oil pump and suppress pressure fluctuations. , supplying high-pressure fuel with stable pressure to the injector. [0003] The current high-pressure common rail pipe adopts a through-hole structure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/02
CPCF02M55/025
Inventor 孙勇白洪林张丛檀丽宏于波李晓娟李广云刘玮
Owner CHINA NORTH ENGINE INST TIANJIN
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