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Method and apparatus for diagnosing faults in a separate oil and gas injection system

An injection system, separate technology, applied in the field of fault diagnosis of separate HCI system, can solve problems such as low reliability of fault diagnosis, and achieve the effects of improving reliability, preventing misdiagnosis and preventing blockage

Active Publication Date: 2021-02-09
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

By contrast, in the recent split-type HCI system, it is difficult to easily understand the performance of the metering valve, pressure sensor, fuel shutoff valve unit, and the entire system formed by these components, so there is a problem of low reliability of its fault diagnosis

Method used

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  • Method and apparatus for diagnosing faults in a separate oil and gas injection system
  • Method and apparatus for diagnosing faults in a separate oil and gas injection system
  • Method and apparatus for diagnosing faults in a separate oil and gas injection system

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Embodiment Construction

[0035] The terms and words used in the description and claims herein should not be interpreted as general or dictionary meanings, but should be properly defined based on the inventors of the present invention in order to describe their invention in the best mode. The principle of the concept of the terminology of the present invention is to be interpreted as the meaning and concept satisfying the technical concept of the present invention. Therefore, the configurations described in the exemplary embodiments of the present invention and the drawings are only the most preferred embodiments, but do not represent the entire technical spirit of the present invention. Therefore, at the time of filing this application, the present invention should be interpreted as including all changes, equivalents and replacements included within the spirit and scope of the present invention. Further, detailed descriptions about well-known configurations and functions will not be provided when it w...

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Abstract

A method for diagnosing a fault in a split HCI system may include: a line loading step of opening a fuel shutoff valve and a metering valve to load fuel into a fuel line and a feed line; After the loading step, controlling the opening or closing of the fuel cutoff valve and the metering valve, and measuring the pressure by the pressure sensor after a predetermined time; and, a diagnosis step of determining whether the split HCI system is malfunctioning based on the pressure measured in the testing step .

Description

technical field [0001] The present invention relates to a method and a device for diagnosing a fault in a separate Hydro Carbon Injection (HCI) system, and more particularly, to a method and a device for diagnosing a fault in a separate HCI system, which Hardware failures in split HCI systems can be diagnosed, eg, valve sticking and fuel leaks, etc. Background technique [0002] As regulations on particulate matter (PM: Particulate Matter) emission from diesel engines have been strengthened, a diesel particulate filter (Diesel Particulate Filter: DPF) has been used as a PM reducing device. The DPF is: a device for collecting PM from exhaust gas and then forcibly recovering the PM by raising the exhaust gas temperature when the PM exceeds a certain amount. [0003] In order to raise the temperature of the exhaust gas for DPF recovery, common rail with post injection has been used, but in the case of commercial vehicle engines, in order to solve the problem of dilution of oil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/025F01N3/023
CPCF02M37/22F02M65/007F01N11/00F01N2550/05F01N2610/03F01N2900/1808Y02T10/40
Inventor 金斗桓
Owner HYUNDAI MOTOR CO LTD
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