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Information Technology Journal
  Year: 2013 | Volume: 12 | Issue: 12 | Page No.: 2405-2411
DOI: 10.3923/itj.2013.2405.2411
 
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Impact of Crank Lengthening on the Performance of an Overhauled Diesel Engine
Wenting Han, Xuan Wang, Jun Qiao, Jun Chen and Shaoping Xue

Abstract:
To 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.
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How to cite this article:

Wenting Han, Xuan Wang, Jun Qiao, Jun Chen and Shaoping Xue, 2013. Impact of Crank Lengthening on the Performance of an Overhauled Diesel Engine. Information Technology Journal, 12: 2405-2411.

DOI: 10.3923/itj.2013.2405.2411

URL: https://scialert.net/abstract/?doi=itj.2013.2405.2411

 
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