Unlock instant, AI-driven research and patent intelligence for your innovation.
Method and device for calculating cumulated amount of carbon
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of carbon accumulation and volume flow, applied in the direction of mufflers, exhaust devices, engine components, etc., can solve the problems that affect the accuracy of regeneration timing, the influence of discharge speed, and the difficulty of judging the timing of regeneration, etc.
Active Publication Date: 2013-04-03
WEICHAI POWER CO LTD
View PDF7 Cites 27 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, due to the small change in pressure difference between the front and back of the DPF, it is difficult to judge the exact timing of regeneration directly from the small change in this data, and the dust contained in the exhaust gas and the discharge speed of the exhaust gas will have an impact on the pressure difference between the front and rear of the DPF. impact, which directly affects the accuracy of judging the timing of regeneration
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0068] see figure 2 , which is a method flowchart of a method for calculating carbon accumulation in the present invention, the method includes the following steps:
[0069] S201: Measure the total pressure difference before and after the DPF of the diesel particulate filter DPF through the pressure difference sensor;
[0070] Here, two pressure sensors installed in front of the DPF input and after the output are used to monitor the pressure before and after the DPF, so as to obtain the total pressure difference between the front and rear of the DPF, which can be referred to figure 1 In the structure shown, the total pressure difference before and after the DPF obtained here does not take into account the impact of other factors on the pressure, such as ash and exhaust gas other than carbon particles in the filter.
[0071] S202: According to the temperature before the DPF and the volume flow of the exhaust gas, obtain the pressure difference before and after the first DPF g...
Embodiment 2
[0095] see image 3 , which is another method flowchart of a method for calculating carbon accumulation in the present invention, based on the first embodiment, the method includes the following steps:
[0096] For S300, please refer to S206 in Embodiment 1.
[0097] S301: Determine an active regeneration timing according to the DPF carbon accumulation.
[0098] It should be noted here that the threshold of DPF carbon accumulation is preset, and when the obtained DPF carbon accumulation exceeds the set threshold, it can be judged that the timing of active regeneration is met, and active regeneration processing is performed on the DPF.
[0099] Preferably, the DPF carbon accumulation ash correction coefficient is obtained by the ash volume;
[0100] Multiplying the DPF carbon accumulation by the DPF carbon accumulation ash correction factor to obtain the first DPF carbon accumulation;
[0101] Correspondingly, the active regeneration timing is judged according to the carbon ...
Embodiment 3
[0109] see Figure 4 , which is a device structure diagram of a device for calculating carbon accumulation in the present invention, including:
[0110] The total pressure difference obtaining unit 401 before and after the DPF is used to measure the total pressure difference before and after the DPF of the diesel particulate filter DPF through a pressure difference sensor;
[0111] The pressure difference obtaining unit 402 before and after the first DPF is used to obtain the pressure difference before and after the first DPF generated by the volume flow of the exhaust gas at the temperature before the DPF according to the temperature before the DPF and the volume flow of the exhaust gas;
[0112] The pressure difference coefficient obtaining unit 403 before and after the second DPF is used to calculate and obtain the pressure difference coefficient before and after the second DPF generated by the volume of ash according to the exhaust gas volume flow rate and the ash volume; ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The embodiment of the invention discloses a method and device for calculating the cumulated amount of carbon. A total pressure difference of the front part and the rear part of a DPF (diesel particulate filter) is measured by a pressure difference sensor, a first pressure difference of the front part and the rear part of the DPF produced by volumetric flow of exhaust gas is obtained according to the temperature of the front part of the DPF and the volumetric flow of the exhaust gas, a coefficient of a second pressure difference of the front part and the rear part of the DPF produced by ash volume is calculated according to the volumetric flow of the exhaust gas and the ash volume, influence of the first pressure difference of the front part and the rear part of the DPF and the coefficient of the second pressure difference of the front part and the rear part of the DPF on the total pressure difference of the front part and the rear part of the DPF is modified to obtain the modified pressure difference of the front part and the rear part of the DPF, the flow resistance corresponding to the modified pressure difference of the front part and the rear part of the DPF is calculated, and the corresponding cumulated amount of carbon in the DPF is obtained according to the flow resistance. Therefore, the cumulated amount of carbon in the DPF can be calculated accurately by modifying the influence of the discharging speed of dust in the exhaust gas and the discharging speed of the exhaust gas on the pressure difference of the front part and the rear part of the DPF, and the accuracy of judgment of the regeneration time of the DPF can be improved greatly.
Description
technical field [0001] The invention relates to the field of particle filtration, in particular to a method and device for calculating carbon accumulation. Background technique [0002] Diesel enginepollution mainly comes from particulate matter, which is mostly composed of tiny particles of carbon and carbides. Due to the increasing requirements for environmental protection, the requirements for emission regulations are becoming increasingly stringent. Diesel vehicles must strictly control these carbon particulate emissions when they emit. [0003] At present, exhaust after-treatment devices have become a standard configuration for diesel vehicles to solve the problem of carbon particulate emissions. Diesel particulate filter (DPF) is recognized as an effective method among many after-treatment devices for carbon particulate emissions of diesel vehicles. [0004] A DPF is a ceramic filter installed in the exhaust system of a diesel engine that traps particulate emission...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More