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A method for monitoring a common-rail injector for large diesel and dual-fuel engines and injector configured to implement this method

An injector and common rail technology, which is used in fuel injection devices, special fuel injection devices, combustion engines, etc., and can solve the problems of inaccurate results and limited amplitude of disturbance pressure signals.

Pending Publication Date: 2020-10-30
OMT DIGITAL SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering that the perturbation pressure signal caused by the needle has limited amplitude when it enters the stop or leaves the upper stop surface, this can lead to inaccurate results given that these events cannot always be easily defined at the algorithmic level

Method used

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  • A method for monitoring a common-rail injector for large diesel and dual-fuel engines and injector configured to implement this method
  • A method for monitoring a common-rail injector for large diesel and dual-fuel engines and injector configured to implement this method
  • A method for monitoring a common-rail injector for large diesel and dual-fuel engines and injector configured to implement this method

Examples

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Embodiment Construction

[0042] exist figure 1Among them, the injector of the common rail injection system is represented by 10. The injector 10 includes a pulverizer 12 with a fuel delivery chamber 14 with a valve seat 16 . The injector needle 18 extends into the delivery chamber 14 and has a sealing surface 20 that cooperates with the valve seat 16 . The injector needle 18 is movable along its longitudinal axis A between a closed position in which the sealing surface 20 abuts the valve seat 16 and an open position in which the sealing surface 20 is spaced from the valve seat 16 . Spring 22 tends to urge injector needle 18 towards the closed position. The pulverizer 12 has a plurality of injection holes 24 through which the pressurized fuel located in the delivery chamber 14 is pulverized when the injector needle 18 is in the open position.

[0043] The injector 10 includes a storage volume 26 which, together with similar storage volumes of other injectors of the same engine, constitutes a distrib...

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PUM

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Abstract

A method for monitoring an injector (10) for common-rail injection systems, comprising detecting an electrical signal (V) indicative of the deformation of a diaphragm (120) of a head plate (50) havinga reaction surface (58) facing a control chamber (34) of the injector (10) and processing the deformation signal (V) to determine characteristic data of the operation of the injector (10).

Description

technical field [0001] The present invention relates generally to injection systems for large diesel and dual fuel engines, such as for large marine engines. [0002] More specifically, the present invention relates to a method for monitoring injectors of a common rail injection system for large diesel and dual fuel engines. [0003] According to another aspect, the invention also relates to an injector for a common rail injection system. Background technique [0004] Common rail injection systems include a pump that pressurizes fuel in a high pressure (common rail) accumulator that feeds the injectors. The injector is provided with a valve seat and an injector needle movable between a closed position and an open position. The position of the injector needle is determined by the magnitude of the two hydraulic forces generated by the action of the pressurized fluid on the appropriate impact surface. [0005] Pressurized fluid is sent into the delivery chamber upstream of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/16F02M57/00F02M47/02F02D41/22
CPCF02M61/16F02M57/005F02M47/027F02D41/22F02M2200/247F02D2041/224F02M65/003F02M65/001F02M65/005F02M2200/21G01L23/10Y02T10/40F02D41/2467F02D41/3827F02M51/061F02D41/401G01L1/16F02M2200/16F02D2200/0602F02M55/025F02M63/0026F02M63/0225F02M2200/244F02M2200/28F02M2200/703
Inventor 马尔科·高宝
Owner OMT DIGITAL SRL