An in-line common rail oil supply pump for controlling low-pressure oil inlet

Abstract

The invention discloses an in-line common rail fuel feed pump capable of controlling low-pressure fuel inlet amount. The in-line common rail fuel feed pump capable of controlling low-pressure fuel inlet amount comprises a pump body connected with a fuel delivery pump and a plurality of common rail unit pumps which are abreast arranged on the pump body, wherein a driving cam for driving the common rail unit pumps to work is arranged in the pump body, the axis of the driving cam is perpendicular to the axis of the plurality of common rail unit pumps, a cam position sensor for monitoring the phase of the driving cam is arranged at the side part of the pump body, the cam position sensor is connected with an ECU (Electronic Control Unit) in a signaling manner, and a lubricating oil joint, a fuel pipe joint and a fuel inlet joint are arranged on the side wall of the pump body. The in-line common rail fuel feed pump capable of controlling low-pressure fuel inlet amount has the advantages that an electronic proportional valve is not needed to control low-pressure fuel inlet amount, the low-pressure fuel inlet amount is controlled through electromagnet parts of the plurality of common rail unit pumps, the structure of the electromagnet parts is simple, the reliability and durability are high, the cost is relatively lower, the in-line common rail fuel feed pump can be produced at home and does not need to depend on import, and the domestic market demands can be satisfied.

Description

technical field [0001] The invention relates to the field of high-pressure common-rail fuel supply pumps for diesel engines, in particular to an in-line common-rail fuel supply pump for controlling low-pressure oil feed. Background technique [0002] In foreign countries, the high-pressure common rail fuel injection system is already a mature product. However, my country mainly relies on the introduction of foreign high-pressure common rail fuel injection systems. Among them, internationally renowned companies such as BOSCH, DENSO, DELPHI and SIMENS monopolize the domestic high-end market of diesel fuel injection systems. Most of the high-pressure common rail fuel injection systems that domestic fuel injection system manufacturing companies are developing or have developed are imitated or slightly improved on the products of foreign companies. This model, while being fast, faces two risks: one is that patent risks cannot be avoided, and the other is that due to the bottlen...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the defects of the existing high-pressure common-rail pumps, which have many components, large volume, and high-pressure leakage, which lead to high oil temperature and low efficiency, as well as the defects that the low-pressure control type common-rail pump is limited by the electronic proportional valve, and provide An in-line common rail oil supply pump for controlling low-pressure oil inlet

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