Method for estimating carbon load of diesel engine exhaust particle trap

A particle filter and diesel engine technology, which is applied to machines/engines, mechanical equipment, engine components, etc., can solve the problems of low accuracy of regeneration timing, complex and changeable working conditions, etc., achieving easy implementation, simple and feasible methods, Reliable effect

Active Publication Date: 2019-03-01
GUANGDONG UNIV OF TECH
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Problems solved by technology

Some related studies have proposed methods based on vehicle mileage or working hours to estimate the carbon load of DPF. The method is simple, low-cost, and relatively easy to implement. However, due

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  • Method for estimating carbon load of diesel engine exhaust particle trap
  • Method for estimating carbon load of diesel engine exhaust particle trap
  • Method for estimating carbon load of diesel engine exhaust particle trap

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[0021] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and not to limit the present invention.

[0022] The method for estimating the carbon loading of a diesel engine exhaust particle trap of the present invention includes the following steps:

[0023] 1) Select the steady-state working condition of the diesel engine and determine the exhaust gas flow rate through the diesel engine exhaust particle trap under this working condition;

[0024] 2) Determine the corresponding front and rear pressure drops of the diesel engine exhaust particulate trap under the exhaust flow under no-load and limited load conditions;

[0025] 3) Build a mathematical model for calculating the carbon load of the diesel engine exhaust particulate trap according to the corresponding pressure drop value of...

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Abstract

The invention relates to a method for estimating the carbon load of a diesel engine exhaust particle trap. The method comprises the following steps that 1) the steady-state working condition of the diesel engine is selected, and the waste gas flow of the exhaust particle trap of the diesel engine under the working condition is determined; 2) the corresponding to front-and-back pressure drop of theDPF in the idle-load and the load-limiting state under the exhaust flow is determined; 3) according to the obtained corresponding to the pressure drop value of the DPF in the idle-load and the load-limiting state under the same exhaust flow rate, and a mathematical model for calculating the carbon load of the DPF is built; 4) the actual measured DPF front-back pressure drop is substituted into the mathematical model under the exhaust flow, the carbon load value of the current DPF is calculated; and 5) the current DPF carbon load value is compared with the DPF carbon load limit value, and whether the current diesel engine exhaust particle trap state needs to be regenerated or not is judged. According to the method, the carbon loading capacity of the particle trap can be accurately estimated, the estimation result reliability is high, and the DPF can be promoted to regenerate in time.

Description

technical field [0001] The invention relates to the technical field of post-treatment of diesel engine exhaust, in particular to a method for estimating the carbon load of DPF of a diesel engine. Background technique [0002] There are three main types of exhaust particulate matter from diesel engines: carbon particles (Soot), surface-adsorbed organic soluble matter (Soluble organic fractions, SOF for short) particles, and sulfate particles. Diesel engine exhaust particles are mostly composed of Soot and SOF particles. [0003] Diesel Exhaust Particulate Filter (DPF) is a particulate filter installed in the exhaust pipeline of a diesel engine, which captures particulate matter in the exhaust to achieve the purpose of purifying the exhaust. When the diesel engine exhaust flows through the DPF, the particulates in the exhaust are captured by the DPF through interception, diffusion, gravity settlement and inertial collision. The capture efficiency is mainly affected by the fil...

Claims

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Application Information

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IPC IPC(8): F01N11/00
CPCF01N11/00F01N2900/1606Y02T10/40
Inventor 彭美春李继龙王海龙黎育雷张伟伦
Owner GUANGDONG UNIV OF TECH
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