A method for judging the failure of a coarse filter element of a filter and a judging device

A technology for judging device and filter, applied in the field of filter, can solve the problems of fuel system failure, fine filter element failure, impurity entry, etc., and achieve the effect of reducing possibility and maintenance cost

Active Publication Date: 2022-07-19
WEICHAI POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the coarse filter element fails, it will increase the clogging of the fine filter element. In severe cases, the fine filter element may also fail, and impurities enter the fuel injection system, which eventually leads to failure of the entire fuel system.
In the prior art, it is judged whether the filter element is invalid by judging whether the pressure difference between inlet and outlet oil is greater than the preset upper limit of pressure difference. have failed, impurities may have entered the fuel injection system, causing the entire fuel system to fail

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  • A method for judging the failure of a coarse filter element of a filter and a judging device
  • A method for judging the failure of a coarse filter element of a filter and a judging device

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Embodiment Construction

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element mu...

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Abstract

The invention discloses a method for judging the failure of a coarse filter element of a filter and a judging device thereof, and relates to the technical field of filters. The method for judging the failure of the coarse filter element of the filter includes the following steps: in the failure monitoring state of the coarse filter element, monitoring the coarse filter pressure difference in N collection steps, and calculating the change rate of the coarse filter pressure difference, if the coarse filter pressure difference The rate of change is less than the threshold value of the differential pressure change rate of coarse filtration, then monitor the pressure after fine filtration in M ​​collection steps, and calculate the pressure change rate after fine filtration, where N and M are positive integers; if the pressure change rate after fine filtration is less than If the threshold value of the pressure change rate after filtration is reached, it is judged that the coarse filter element is invalid. The method for judging the failure of the coarse filter element of the filter can assist the user to discover and replace the failed coarse filter element in time, so as to avoid further damage to the fine filter element, reduce maintenance costs, and reduce the possibility of fuel system failure.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a method for judging the failure of a coarse filter element of a filter and a judging device thereof. Background technique [0002] During the working process of the engine, metal wear debris, dust, carbon deposits oxidized at high temperature, colloidal sediment, water, etc., are continuously mixed into the fuel. Generally, the impurities in the fuel are filtered through the fuel filter to prevent the impurities from entering the fuel injection system and eventually lead to the failure of the fuel system. [0003] The fuel filter includes a coarse filter element and a fine filter element. The function of the coarse filter element is to separate the large particles of impurities and water in the fuel, and the function of the fine filter element is to separate the small particle impurities in the fuel. The coarse filter element and the fine filter element Co-process the large and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M37/40
CPCF02M37/40
Inventor 张衡王洋宋业栋张延良
Owner WEICHAI POWER CO LTD
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