Extraction Methods and Implementation Technologies of Fuel Injection Pump Cam Profile Characteristics

Yangpeng Liu,Jianjun Ding,Lin Sun,Tao Li,Zhuangde Jiang,Changsheng Li,Mingming Song,Peng Chen,Jingyang Guo

doi:10.1155/2021/6657632

Yangpeng Liu, Jianjun Ding + Show 7 more

Open Access

https://doi.org/10.1155/2021/6657632

Copy DOI

Abstract

Because the traditional camshaft measurement methods cannot be applied to the injection pump cam, in order to improve the measurement automation of injection camshaft, an accurate extraction method of the characteristic parameters of the injection cam profile is proposed in this paper. In this method, the phase error optimization is realized by the angle precise rotation matching of the actual lift data. The optimization is realized by the Lagrangian polynomial interpolation algorithm based on the moving window. The goals of precise measurement of the peach point phase of single high point cam and accurate acquisition of the back dead point phase of high point arc segment cam are realized. Compared with the precision of high-precision measuring equipment, the method can extract the lift and phase angle error of the cam accurately and stably.

Highlights

In order to achieve energy saving and reduce emissions, electronic high-pressure injection technology has been widely used in diesel engines. e injection cam is an important part in the high-pressure injection system
An accurate extraction method of the characteristic parameters of the injection cam profile is proposed in this paper. e phase error optimization strategy is realized by the angle precise rotation matching of the actual lift data. e goals of precise
Phase Reference. e phase angle error refers to the difference between the design angle and the actual angle of the feature point on the cam relative to the phase reference in the circumferential direction. e variation of the measured element relative to the ideal element of the determined position is the positioning error [25]. e position of the ideal element is determined by the datum and the theoretical correct size

Summary

Introduction

In order to achieve energy saving and reduce emissions, electronic high-pressure injection technology has been widely used in diesel engines. e injection cam is an important part in the high-pressure injection system. In order to ensure the machining quality of the cam profile, it is necessary to develop high-precision and stable measuring and data processing methods [8,9,10]. Because of the cams with different tip phases on the same camshaft, the angle datum cannot be measured automatically. Because of the unsymmetrical profile and the circular arc of the peach tip, most of the research on the injection cams cannot be applied to the valve cam. E phase error optimization strategy is realized by the angle precise rotation matching of the actual lift data. Mathematical Problems in Engineering measurement of the peach point phase of single high point cam and accurate acquisition of the back dead point phase of high point arc segment cam are realized [18]

Methodology

Accurate Extraction of Lift Error and Phase Error Information

Phase Angle Error

Application

Conclusion