Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2013.2405.2411HanWenting WangXuan QiaoJun ChenJun XueShaoping 1220131212To restore the original power, economy and technical indicators
of an overhauled diesel engine, the crank lengthening method was adopted and
tested in the study. The crank of a Dongfanghong type 4125A diesel engine was
extended by 0.75 mm, which is within the range tolerable to the structure. The
internal combustion engine rig test method was adopted and a hydraulic dynamometer,
comprehensive engine tester, smoke meter and additional instruments were employed
to measure the indicators cylinder pressure, speed control characteristics,
power, reliability and economy of the diesel engine before and after rebuilding
for comparison. The results show that the rebuilding method in which the crank
is lengthened increased the maximum power of the diesel engine by 2.32 kW, decreased
fuel consumption by 5 g/(kW·h), decreased the exhaust gas temperature
by 27°C, decreased the smoke density by 0.2 BSU and increased the mean pressure
of various cylinders by 0.31 MPa. The results confirm that the crank lengthening
method is effective at restoring the original power, economy and technical indicators
of an overhauled diesel engine.]]>Qiao, Y.Z. and J.L. Huang,2012174954Wang, Y.,201138125128Lu, K.M. and Y. Wang,2011238487Zhang, H.J., A. Zhang and J.M. Li,2011172326Yao, X.G., Y. Wang, S.L. Wang and H.Y. Jiang,2000311316Sanli, A., A.N. Ozsezen, I. Kilicaslan and M. Canakci,20082813951404Bayrakceken, H., S. Tasgetiren and F. Aksoy,200714725730Thu Zar, K.H., N. Uchiyama, T. Unno, S. Sano and S. Noda et al.,20112011pp: 677681Yue, Q.J.,200866566Zhao, W.H., B.L. Su, Z.T. Su and J.M. Wei,199754647Yang, J.S.,199334950Wang, Y.Q. and G.Q. Wang,201054142