Carbon Load Estimation Method for Diesel Particulate Filter

A technology for particle traps and diesel engines, which is applied in the direction of machines/engines, mechanical equipment, engine components, etc. It can solve the problems of complex and changeable working conditions and low accuracy of regeneration timing. The method is simple, feasible, easy to implement, and easy to calculate. The result is precise effect

Active Publication Date: 2021-05-25
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 to the complex and changeable working conditions of diesel engines in actual vehicle operation, these methods The accuracy of judging the timing of regeneration is not high and has certain limitations

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  • Carbon Load Estimation Method for Diesel Particulate Filter
  • Carbon Load Estimation Method for Diesel Particulate Filter
  • Carbon Load Estimation Method for Diesel Particulate Filter

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Embodiment Construction

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

[0022] The method for estimating the carbon load of the diesel exhaust particulate filter of the present invention comprises the following steps:

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

[0024] 2) Determine the front and rear pressure drop corresponding to the exhaust flow rate of the diesel engine exhaust particulate filter in the no-load and limited-load state;

[0025] 3) According to the pressure drop value corresponding to the no-load and load-limited state of the diesel engine exhaust par...

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Abstract

The invention is a method for estimating the carbon load of a diesel engine exhaust particulate filter, comprising the following steps: 1) selecting a diesel engine steady-state working condition and determining the flow rate of exhaust gas passing through the diesel engine exhaust particulate filter under this working condition; 2) ) Determine the front and rear pressure drop corresponding to the exhaust flow in the no-load and load-limited states of the DPF; 3) Build and calculate the DPF carbon The mathematical model of the load; 4) Substitute the actually measured pressure drop before and after the DPF into the mathematical model under the exhaust flow rate, and calculate the carbon load value of the current DPF; 5) Substitute the carbon load value of the current DPF The load value is compared with the DPF carbon load limit value to determine whether the current state of the exhaust particulate filter of the diesel engine needs to be regenerated. The invention can accurately estimate the carbon load of the particle trap, has high reliability of the estimation result, and helps to promote the timely regeneration of the DPF.

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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Patent Type & Authority Patents(China)
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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