Structural Modifications of the Inner Surface of Cylinder Liners for Decreasing Mechanical Losses in High-Speed Diesel Engines

2023-01-5024

04/27/2023

Features
Event
Automotive Technical Papers
Authors Abstract
Content
The most preferred method for reducing mechanical losses in internal combustion engines (ICEs) is profiling contact surfaces, which involves forming microreliefs on the inner surface of cylinder liners (CLs). This work presents analytical and experimental results of the frictional power losses in the four-stroke diesel engine with smooth and microrelief CLs. The regular microreliefs (RMR), with a groove width of 0.4 mm, an amplitude of 1.5 mm, and a relative frictional area of 8.6%, were formed through vibration rolling. Experiments were conducted on both smooth and microrelief cylinders by measuring fuel consumption at 25–100% nominal load and idle mode at a constant speed. The results showed that compared to the engine with smooth CLs, the total frictional power is reduced by an average of 10.8%, mechanical efficiency is increased by 4.0%, and fuel consumption is decreased by 6.4% for the engine with microrelief cylinders. The measured frictional power dropped by 0.90 kW, which is close to the 0.81 kW value calculated using mathematical models and Ansys software simulation.
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DOI
https://doi.org/10.4271/2023-01-5024
Pages
14
Citation
Ha Hiep, N., Cong Doan, N., Quoc Quan, N., and Van Duong, N., "Structural Modifications of the Inner Surface of Cylinder Liners for Decreasing Mechanical Losses in High-Speed Diesel Engines," SAE Technical Paper 2023-01-5024, 2023, https://doi.org/10.4271/2023-01-5024.
Additional Details
Publisher
Published
Apr 27, 2023
Product Code
2023-01-5024
Content Type
Technical Paper
Language
English