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机械部重型矿山机械局于1985年2月3～5日在天津市主持鉴定了SWYJ双涡轮液力变矩器系列,有关20个单位的36名代表参加了鉴定会。该系列是由天津工程机械研究所研制的,有4个尺寸档,7档能容共有28种不同规格。功率范围为40～320马力(400马力),额定转速范围为2000～2800转/分,前后峰最高效率均达80%～83%。效率比现有产品提高3～4%,并使转换工况点效率提高到70%左右。自1984年以来,该系列已由专业厂试制成功并在ZL系列装载机上陆续推广应用。
The Bureau of Heavy Mining and Machinery of the Ministry of Machinery hosted the SWYJ double-turbo torque converter series in Tianjin from February 3rd to 5th, 1985. Thirty-six representatives of 20 units attended the appraisal meeting. The series was developed by the Tianjin Institute of Construction Machinery and has four sizes of gears. The seven gears can accommodate a total of 28 different sizes. The power range is 40-320 hp (400 hp), the rated speed range is 2000-2800 rpm, and the peak efficiency of the front and rear peaks reaches 80%-83%. The efficiency is increased by 3 to 4% compared to the existing products, and the efficiency of the conversion point is improved to about 70%. Since 1984, the series has been successfully trial-produced by a professional factory and has been successively applied on ZL series loaders.