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The Characteristics of Wear in Diesel Engines with Scrubber EGR System
Technical Paper
2000-05-0122
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English
Abstract
The effects of recirculated exhaust gas on the wear of piston and piston rings were investigated by the experiment with a two-cylinder, four-cycle, indirect injection diesel engine operating at 75% load and 1600 rpm. For the purpose of comparison between the wear rates of the two cylinders with and without EGR, the recirculated exhaust gas was sucked into one of two cylinders after the soot contents in exhaust emissions were removed by an intentionally designed cylinder-type scrubber equipped with 6 water injectors (A water injector has 144 nozzles of 1.0 mm diameter), while only the fresh air was inhaled into the other cylinder. These experiments were carried out with the fuel injection timing fixed at 15.3° BTDC. It was found that the wear rate of piston skirt with EGR increased a little bit, but the piston head diameter increased, rather than decreased, owing to soot adhesion and erosion wear, and especially larger with EGR, and that the wear rates of the top and second piston ring (compression ring) thickness with EGR were more than twice the wear rate of top ring in case of no EGR, but the wear rate of oil rings thickness without EGR increased greater than that with EGR.
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BAE, M., HA, J., and TSUCHIYA, K., "The Characteristics of Wear in Diesel Engines with Scrubber EGR System," SAE Technical Paper 2000-05-0122, 2000.Also In
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