The concept of vehicle specific gravity has been employed as an indicator for measuring the progress achieved in reducing the weight of transportation equipment. In this paper, to estimate the vehicle specific gravity for 1997 Japanese midsize and compact passenger car, the weight percents of the 22 materials making up the 1997 car are estimated by not only approximate function analysis based on the method of least squares and weight percents of the 22 materials making up from the 1973 to the 1992 cars, but also the trend analysis peculiar to the domestic passenger car. The results show that the weighted average of coefficient of relative correlation depending on 22 approximate functions is 0.96 and the error between an estimated and actual vehicle specific gravity is about 1.3 percent.
|Translated title of the contribution||Optimum material in body weight reduction for domestic passenger car (1st report, estimating the progress in reducing future domestic passenger car weight)|
|Number of pages||7|
|Journal||Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A|
|Publication status||Published - 1 Jan 1999|