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

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 ...

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

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