Filtering Design and Analysis of Clamp-On Pressure Signals of High Pressure Fuel Pipe

Abstract:

Measuring the clamp-on pressure of high pressure fuel pipe is a shortcut for obtaining injection parameters and fault diagnosis of the fuel injection pumps [1,. Based on the analysis of the fuel injection process of fuel injection pump, analyzed the differences of practical injection process and geometric injection process, and obtained the theory waveform feature points of diesel engine high pressure pipe fuel injection process. In order to obtain the clamp-on pressure waveform which feature points consistent with the theoretical waveform, designed the hardware filter based on MAX293. Considering the clamp-on pressure signal sometimes must also meet the requirements of no delay, designed frequency domain filter. Two filtering methods have reached the expected results.

• Periodical: Advanced Materials Research (Volumes 834-836)
• Pages: 891-895
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.834-836.891
• Online since: October 2013
• Authors: Xiao Ming Zhang*, Feng Xu, Jian Min Liu, Fu Zhou Feng
• Keywords: Clamp-On Pressure, Frequency Domain Filtering, High Pressure Pipe, Low-Pass Filtering

References

[1] Wu Bo, Wu Gongping, Yang Shuzi, Ma Yuangao. Feature Extraction and Representation of Pressure Waveform of Diesel Fuel Injection System. Vol. 5 (1992), pp.34-40.

[2] Liu Jianmin, Zhang Kequan, Dai Zhiliang, Wang Shusan.  A New Method of Fault Detection System of Fuel Injection of Diesel Engine. Chinese Internal Combustion Engine Engineering, Vol. 3(1993), pp.71-76.

[3] Sun Jialin. The principle of engine for vehicle. Academy of Armored Force Engineering, (1987).

[4] Li Linqian, Zhang Xiaoming, Liu Jianmin, An Gang. Development and Application of New Pipe Pressure Sensor. Journal of Academy of Armored Force Engineering, Vol. 1(2009), pp.60-64.

[5] Wang Ji. Application of MATLAB in Vibration Signals Processing. China Water Conservancy and Hydropower Press, (2006).