Experimental Study on the Eligibility Percentage of Fuel WTD Valve Flow Test of X Engine

Abstract

Experimental study was made to raise the eligibility percentage of the fuel WTD valve flow test of X engine, thus advancing the reliability of fuel distribution of the WTD valve. The spring--valve housing matching test of this paper demonstrates that the eligibility percentage is dependent not only on the spring height, but also intimately on the geometrical regularity of gain slots and return holes. The height-variable spring--valve housing matching test of this paper testifies that the eligibility percentage of spring matching vs. height has the characteristic of normal distribution, with the pre-calculated height at the normal peak. Therefore, the spring design calculation method referenced in this paper is practicable and reliable. The valve flow test shows it is improper to decide whether a spring can be used or not just on one spring--one valve housing basis. A suitable way is to match one spring to at least two to three valve housings in order to raise productivity and application of reliable springs.