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A method for estimating the carbon load of a dpf system and judging the clogging state

A state judgment, DPF technology, applied in the direction of calculation, internal combustion piston engine, diagnosis device of exhaust gas treatment device, etc., to achieve the effect of simple operation and accurate judgment

Active Publication Date: 2017-05-24
KAILONG HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above technical problems, the purpose of the present invention is to provide a method for estimating the carbon load of the DPF system and judging the clogging state. The method can estimate the carbon load of the DPF filter in real time online during the running of the diesel vehicle, and further judge the DPF filter. It solves the problem that the DPF filter needs to be disassembled from the engine pipeline to determine the carbon load and blockage of the DPF filter.

Method used

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  • A method for estimating the carbon load of a dpf system and judging the clogging state
  • A method for estimating the carbon load of a dpf system and judging the clogging state
  • A method for estimating the carbon load of a dpf system and judging the clogging state

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Embodiment 1

[0038] Please refer to figure 2 as shown, figure 2 It is a block diagram of the control principle of carbon load estimation and clogging state judgment of the DPF system provided by Embodiment 1 of the present invention.

[0039] In this embodiment, a carbon load model based on differential pressure is established, and the carbon load in the DPF filter is estimated by combining air flow, fuel consumption, exhaust temperature before the DPF filter, and differential pressure value of the DPF filter; establishment of clogging state judgment The model, combined with the estimated carbon load in the DPF filter, judges the clogging state of the DPF filter, and provides a basis for active regeneration control.

[0040] Please refer to image 3 as shown, image 3 It is a flow chart of the method for estimating the carbon load of the DPF system and judging the clogging state provided by Embodiment 1 of the present invention.

[0041] In this embodiment, the estimation of the carb...

Embodiment 2

[0064] Please refer to Figure 5 as shown, Figure 5 It is a block diagram of the carbon load estimation and clogging state judgment control principle of the DPF system provided in this embodiment.

[0065] In this embodiment, a carbon load model based on driving conditions is established, and the carbon load in the DPF filter is estimated by combining the vehicle speed and the exhaust temperature value in front of the DPF filter; The carbon load in the filter can be used to judge the clogging status of the DPF filter, which provides a basis for active regeneration control.

[0066] Please refer to Figure 6 as shown, Figure 6 It is a flow chart of the method for estimating the carbon load of the DPF system and judging the clogging state provided in this embodiment.

[0067] In this embodiment, the estimation of the carbon load of the DPF system and the judgment of the blockage state include the following steps:

[0068] S601. Obtain a driving condition map corresponding...

Embodiment 3

[0087] Please refer to Figure 8 as shown, Figure 8 It is a block diagram of the control principle of carbon load estimation and clogging state judgment of the DPF system provided by Embodiment 3 of the present invention.

[0088] In this embodiment, the carbon load in the DPF filter is obtained by using the carbon load model based on differential pressure in Example 1; at the same time, the DPF is obtained by using the carbon load model based on driving conditions in Example 2 Carbon load in the filter. Establish a clogging state judgment model, combine the carbon load in the DPF filter estimated by the carbon load model based on differential pressure and the carbon load in the DPF filter estimated by the carbon load model based on driving conditions, and judge the DPF filter If any of the DPF filters is judged to be clogged, active regeneration will be triggered.

[0089] The technical scheme of the present invention realizes that during the running process of a diesel v...

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Abstract

The invention discloses a DPF (Diesel Particulate Filter) system carbon loading capacity estimation and blocking state judgment method. According to the method, a carbon loading capacity model based on a differential pressure carbon loading capacity and driving conditions and a blocking state judging model are established, and related engine operating parameters and related DPF system sensor parameters are combined, so that the loading capacity of carbon in a DPF is established on line in a diesel vehicle driving process, the blocking state of the DPF is further judged, and the difficult problem that determination of the carbon loading capacity and the blocking state of the DPF can only be realized when the DPF is dismounted from an engine pipeline is solved; in addition, the method has the characteristics of being simple in operation and estimation, and accurate in judgment.

Description

technical field [0001] The invention relates to the technical field of post-treatment of exhaust gas of an internal combustion engine, in particular to a method for estimating the carbon load of a diesel particulate filter system (Diesel Particulate Filter, DPF) and judging the clogging state. Background technique [0002] At the same time of rapid economic development, my country's environmental problems have become increasingly severe, among which the problem of air pollution is particularly prominent. The emission of particulate matter (PM) in automobile exhaust is an important factor in urban haze weather, while the emission of particulate matter (PM) from diesel engines is generally It is dozens of times larger than gasoline engines; at the same time, with the implementation of my country's National IV and National V emission regulations for vehicle diesel engines, the emission requirements for diesel engine particulate matter are also getting higher and higher. For dies...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N11/00G06F17/50
CPCY02T10/40
Inventor 臧志成
Owner KAILONG HIGH TECH