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Microleakage device and common rail tube

A common rail pipe and valve seat technology, which is applied in fuel injection devices, charging systems, engine components, etc., can solve the problems of poor rail pressure followability of injectors, achieve good followability, realize trace leakage, and solve rail pressure problems The effect of poor followability

Pending Publication Date: 2020-02-28
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Based on the same inventive concept, the second technical problem to be solved by the present invention is to provide a common rail pipe using the above-mentioned micro-leakage device to solve the problem of poor rail pressure followability of injectors without static leakage

Method used

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  • Microleakage device and common rail tube
  • Microleakage device and common rail tube
  • Microleakage device and common rail tube

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and not to limit the present invention.

[0033] image 3 The arrow shown in indicates the direction of fuel flow.

[0034] like figure 1 and figure 2 Commonly shown, a kind of micro-leakage device, comprises valve seat 4, is provided with valve seat oil passage in valve seat 4, and valve seat 4 is provided with oil inlet 45 and oil return port 46 that are connected with valve seat oil passage, valve The surface of the oil inlet end of the seat 4 is provided with an external thread, and the valve core 2 is provided inside the valve seat 4, and the valve seat 4 and the valve core 2 have a gap fit, and the gap is micron level, and the...

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Abstract

The invention discloses a microleakage device and a common rail tube. The microleakage device comprises a valve seat, wherein a valve seat oil channel is formed in the valve seat, the valve seat is provided with an oil inlet and an oil return opening which communicate with the valve seat oil channel, a valve core and a first limiting structure are arranged in the valve seat, the valve core and thevalve seat are in clearance fit with each other, the clearance between the valve core and the valve seat respectively communicate with the air inlet and the air return opening, two ends of the valvecore are respectively a first end of the valve core and a second end of the valve core, and in the flowing direction of fuel oil, the first end of the valve core is located on the upper stream of thesecond end of the valve core, and the second end of the valve core is abutted against the first limiting structure. The microleakage device is added on the common rail tube, and when rail pressure isexcessively high, releasing of the rail pressure is performed through the microleakage device, the excessively high part of the rail pressure is released, following performance of actual rail pressureand set rail pressure of an engine is enabled to be good, and the problem that a microleakage oil sprayer is poor in rail pressure following performance is solved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a micro-leakage device and a common rail pipe. Background technique [0002] In the practical application of high-pressure common rail engines, there is a problem of poor followability between the actual rail pressure and the set rail pressure of the common rail pipe, that is, the actual rail pressure lags behind the set rail pressure. In order to solve the above problems, the general Use the following three options: [0003] (1) The common rail fuel system remains unchanged, the fuel injector is replaced from a static leak injector to a non-static leak injector, and an empty injection strategy is used at the same time; [0004] (2) The fuel injector in the common rail system adopts a non-static leak injector, and an electronically controlled pressure relief valve is added to the common rail pipe, and the rail pressure control is realized by controlling the electronically contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/00F02M55/02
CPCF02M55/002F02M55/025
Inventor 王光明谢凤徐帅卿刘云霞魏工杰
Owner WEICHAI POWER CO LTD
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