关键词: 偏心燃油泵；油表；油箱；阻值信号

Abstract: Aiming at the defect of inconsistent fuel level displayed on the fuel gauge with the actual remaining fuel in a certain vehicle model, which causes stalling during driving, this paper conducts an in-depth analysis of various potential causes, including the impact of the individual structures of the fuel gauge, eccentric fuel pump and fuel tank on the accuracy of fuel level display, as well as the effect of the comprehensive state of the eccentric fuel pump and fuel tank after assembly on the accuracy of fuel level display. The research finds that under the premise that the individual structures and performances all meet the requirements, the assembly state of the eccentric fuel pump and fuel tank has a significant impact on the output accuracy of the fuel level resistance value. Based on the analysis of the defect, an optimization scheme is designed to limit the displacement of the eccentric fuel pump through the structure of the fuel tank body, which can ensure the correct assembly state of the two components and further guarantee the output accuracy of the fuel level resistance signal. This achievement provides important guidance for the installation and matching design of fuel pumps and fuel tanks in subsequent new vehicle models. For fuel pumps with eccentric structures, it is recommended to pre-set limiting structures during the fuel tank data design stage to avoid mass defects in the later period.

Key words: offset fuel pump; fuel gauge; fuel tank; resistance signal