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Diesel particulate filter regeneration predicting method

A particle filter and diesel engine technology, applied in the field of Internet of Vehicles, can solve the problem of inability to predict the remaining running time or mileage, and achieve the effect of avoiding the impact

Inactive Publication Date: 2019-04-16
SHANGHAI XINGRONG AUTOMOBILE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The limitation of the above scheme is that it can only evaluate the accumulated amount of particulate matter in the current DPF, and then decide whether to carry out DPF regeneration based on the accumulated amount of particulate matter in the current DPF. Users can more flexibly arrange the timing of DPF regeneration

Method used

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  • Diesel particulate filter regeneration predicting method
  • Diesel particulate filter regeneration predicting method
  • Diesel particulate filter regeneration predicting method

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Embodiment 1

[0033] Assuming that the operating conditions of the engine / vehicle do not change significantly, the remaining time / mileage for the accumulation of particulate matter from the current value to the DPF regeneration limit can be calculated based on the current operating condition distribution.

[0034] Such as image 3 As shown, the DPF regeneration prediction method of the present embodiment includes the following steps:

[0035] Step 1: Read the time distribution ratio p of each interval in the current engine working condition statistical table. The horizontal direction in the working condition statistical table represents the engine speed, and the vertical direction represents the engine torque. The interval is composed of a specific rotational speed value range and A specific torque value range is defined, and the time distribution ratio refers to the ratio of time spent in a specific rotational speed value range and a specific torque value range to the entire engine running...

Embodiment 2

[0042] According to various typical operating conditions of vehicles / mechanical equipment, various operating states can be converted into corresponding statistical tables of engine operating conditions. Time / mileage required to reach DPF regeneration limit when running down. The typical engine working conditions include: urban road conditions, high-speed road conditions, comprehensive road conditions, etc., full-load operation, no-load operation and comprehensive operation conditions.

[0043] Such as Figure 4 As shown, the DPF regeneration prediction method of the present embodiment includes the following steps:

[0044] Step 1: Read the time distribution ratio p of each interval in the statistical table of typical engine operating conditions. In the statistical table of operating conditions, the horizontal direction represents the speed of the engine, and the vertical direction represents the torque of the engine. The interval is composed of a specific rotational speed val...

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Abstract

The invention provides a diesel particulate filter regeneration predicting method. The method comprises the following steps that step 1, the time distribution ratio p of each interval in a current ora typical diesel engine working condition statistical table is read; step 2, a particle emission value W corresponding to an interval of an engine particle emission model is read; step 3, the particlevalue average growth rate (please see the specification for the formula) of the DPF is calculated; step 4, a current particle value M of the DPF is obtained, and a residual particle value before regeneration is calculated according to the formula of W<r>=W<max>-M; and step 5, the remaining time or mileage (please see the specification for the formula) of regeneration of the DPF in the working condition is calculated. Compared with an existing technology that a user can only be reminded to conduct regeneration by a DPF regeneration strategy when a particulate accumulation value or the pressuredifference between two ends of the DPF reaches a limit value, the method can give the user remaining time / mileage information of the next regeneration so that the user can better understand the nextregeneration time to arrange the regeneration reasonably, and influence on normal business can be reduced or avoided.

Description

technical field [0001] The invention relates to the technical field of Internet of Vehicles, in particular to a method for predicting regeneration of a diesel particulate filter. Background technique [0002] A Diesel Particulate Filter (DPF) is a filter device installed in the exhaust system of a diesel engine that separates particulate matter from engine exhaust, intercepts it and accumulates it on filter materials before it enters the atmosphere. As more and more particles accumulate on the filter material, the filter holes will be blocked, the exhaust resistance will increase, and the engine power will decrease. At this time, it is necessary to clean the particles in time to ensure the normal operation of the DPF. This process is the regeneration of the DPF. [0003] DPF regeneration is divided into active regeneration and passive regeneration. During active regeneration, the controller will increase the exhaust gas temperature through additional fuel injection and oth...

Claims

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Application Information

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IPC IPC(8): F01N11/00
CPCF01N11/00Y02T10/40
Inventor 蔡继业陈一平
Owner SHANGHAI XINGRONG AUTOMOBILE TECH CO LTD
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