Pressure control method, apparatus and system for dpf testing
A technology of pressure control and DPF, which is applied in general control systems, electric fluid pressure control, fluid pressure control, etc., can solve problems such as large fluctuations, slow response of electric valves, and slow setting values, so as to improve rapid response ability, fast response, less susceptible to interference effects
Active Publication Date: 2022-07-26
WUXI WEIFU HIGH TECH CO LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Conventional DPF test systems usually use electric valves to control the pressure. After each fuel injection, due to the slow response of the electric valve, the pressure returns to the set value of the pressure parameter corresponding to the set working condition slowly and fluctuates greatly, which leads to the test system The error is large and the accuracy is low
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0041] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0042] like figure 1 As shown, an embodiment of the present invention provides a pressure control system for DPF testing, including: a processor 1, an amplifier 2, a proportional solenoid valve 3, a pressure sensing unit 4, and an oil supply pipeline 5;
[0043] One end of the oil supply pipeline 5 is used to connect the fuel source, and the other end is used to connect the injection device;
[0044] The proportional solenoid valve 3 and the pressure sensing unit 4 are arranged in sequence on the oil supply pipeline 5;
[0045] The pressure sensing unit 4 is connected to the signal input...
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 invention provides a pressure control method for DPF test, which can realize the rapid recovery of the pressure of the test system to the set value through the improved PID control. The invention also provides a pressure control system for DPF testing, comprising: a processor, an amplifier, a proportional solenoid valve, a pressure sensing unit, and an oil supply pipeline; the proportional solenoid valve and the pressure sensor are sequentially arranged on the oil supply pipeline unit; the pressure sensing unit is connected to the signal input end of the processor, and is used to obtain the pressure parameter detection value in the oil supply pipeline and feed it back to the processor; the pressure parameter setting value corresponding to each test condition is preset in the processor, The processor is used to compare the pressure parameter detection value corresponding to the working condition with the pressure parameter setting value, generate the corresponding PWM control signal, and drive the proportional solenoid valve through the amplifier, thereby realizing PID control. The present invention can perform on-line self-tuning of parameters, which is beneficial to improve the quick response capability of the test system.
Description
technical field [0001] The present invention relates to a test pressure control method, in particular to a pressure control method, device and system for DPF test. Background technique [0002] DPF is the abbreviation of Particulate Filter. DPF is used in diesel engines and plays an important role in reducing vehicle emissions; [0003] When testing DPF samples, the fuel injection interval of the test system is short, and the pressure fluctuation in the oil supply pipeline is large. It is necessary to restore the oil supply in the oil supply pipeline to the set value of the pressure parameter corresponding to the set working condition in a very short time. ; [0004] In the conventional DPF test system, the electric valve is usually used to control the pressure. After each fuel injection, because the electric valve responds too slowly, the pressure returns to the set value of the pressure parameter corresponding to the set working condition, and the fluctuation is large, wh...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/42G05B13/04G05B13/02G05B19/05G05D16/20
CPCG05B11/42G05B13/042G05B13/028G05B19/05G05D16/2006
Inventor 李鸿毅季玉辉
Owner WUXI WEIFU HIGH TECH CO LTD