A slide valve type common rail fuel injector

A common rail injector and slide valve technology, which is applied in fuel injection devices, machines/engines, charging systems, etc., can solve the problems of occupying the internal space of the slide valve, moving speed of the slide valve, stability and fuel injection stability. Better, increasing the dead zone volume of the slide valve control chamber, etc., to achieve the effect of reducing the dead zone volume, increasing the movement speed, and improving the hydraulic response speed

Active Publication Date: 2022-04-26
CHINA NORTH ENGINE INST TIANJIN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the spool type common rail injector either does not have a reset structure or uses a return spring to achieve reset. Among them, the spool valve movement speed, stability and fuel injection stability of the spool type common rail injector without the reset structure The performance is not good; the return spring is used to realize the return of the spool type common rail injector, and the return spring occupies the internal space of the spool, which increases the dead zone volume of the control chamber of the spool and affects the hydraulic response speed of the control chamber

Method used

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  • A slide valve type common rail fuel injector
  • A slide valve type common rail fuel injector
  • A slide valve type common rail fuel injector

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Embodiment Construction

[0023] 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.

[0024] 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 present invention provides a spool type common rail fuel injector, which includes a solenoid valve assembly, a spool valve assembly, and a needle valve assembly in sequence from top to bottom, and also includes an annular permanent magnet embedded in the top of the needle valve sleeve ; Realize the rapid reset of the slide valve spool in the slide valve sleeve. The present invention is improved on the basis of the traditional slide valve. The magnetic force provided by the permanent magnet is used instead of the traditional return spring to reset the slide valve. Compared with the slide valve structure with return spring, this structure does not occupy the internal space of the slide valve and reduces the The dead zone volume of the slide valve control chamber is increased, and the hydraulic response speed of the control chamber is improved.

Description

technical field [0001] The invention belongs to the technical field of common rail fuel injectors, in particular to a slide valve type common rail fuel injector. Background technique [0002] As the core of the new generation diesel engine technology, the common rail injector has been fully developed and widely used in vehicles, electric power, ships, military and other fields. The control valve is one of the core components of the common rail injector, and its structure directly affects the performance of the injector. [0003] In the prior art, the spool type common rail injector either does not have a reset structure or uses a return spring to achieve reset. Among them, the spool valve movement speed, stability and fuel injection stability of the spool type common rail injector without the reset structure The performance is not good; the return spring is used to realize the return of the spool type common rail injector, and the return spring occupies the internal space o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/10F02M51/06F02M61/16
CPCF02M61/10F02M51/0689F02M61/16
Inventor 李春晖吴小军顾娇娇张子威陈晓欢
Owner CHINA NORTH ENGINE INST TIANJIN
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