Segmented rail for high-pressure common rail system and control method of segmented rail

A high-pressure common rail system and segmented technology, applied in electrical control, charging system, engine control, etc., can solve problems such as poor stability and consistency, and achieve increased fuel injection rate, improved stability, and improved consistency sexual effect
CN112267964APending Publication Date: 2021-01-26TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
Publication Date
2021-01-26

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Abstract

The invention discloses a segmented rail for a high-pressure common rail system. The segmented rail comprises a segmented rail body, a high-pressure conversion connector and a one-way valve, wherein the high-pressure conversion connector and the one-way valve are installed on the segmented rail body in a sealed mode; the segmented rail body is hollow to form a pressure accumulation volume cavity used for containing high-pressure fuel oil, and the high-pressure fuel oil enters the pressure accumulation volume cavity in a one-way mode through the one-way valve; and the high-pressure fuel oil inthe pressure accumulation volume cavity flows out through the high-pressure conversion connector and enters an electric control oil sprayer; and the volume of the pressure accumulation volume cavity is larger than or equal to 40 times of the maximum oil spraying amount per cycle of the electric control oil sprayer. According to the segmented rail for the high-pressure common rail system, high-pressure fuel oil pressure drop caused by oil spraying each time can be effectively reduced, the stability of fuel oil spraying can be improved, and the fuel oil spraying speed can be increased. Meanwhile, due to the effect of the one-way valve in the segmented rail for the high-pressure common rail system, the pressure change of the high-pressure fuel oil in the pressure accumulation volume cavity cannot influence the pressure of the high-pressure fuel oil in the pressure accumulation volume cavity in the adjacent segmented rail, and the consistency of fuel oil spraying of the high-pressure common rail system can be effectively improved.
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Description

technical field

[0001] The invention relates to the technical field of high-pressure fuel supply for high-power diesel engines, in particular to a segmented rail for a high-pressure common rail system and a control method thereof. Background technique

[0002] In the high-pressure common rail system for high-power diesel engines, due to the structural size of the high-power diesel engine, the size of the high-pressure common-rail pipe is relatively long, which increases the processing difficulty of the high-pressure common-rail pipe and increases the manufacturing cost of the high-pressure common-rail pipe; at the same time, The high-pressure common rail system for high-power diesel engines has a large amount of fuel injection per cycle, resulting in a large pressure drop in the high-pressure common rail pipe, which directly affects the stability and consistency of fuel injection, and also causes a drop in fuel injection rate. Contents of the invention

[0003] The object ...

Claims

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