The combined effect of surface texturing and DLC coating on the functional properties of internal combustion engines

Abstract

A reduction in frictional loss is an important aspect of efficiency in high-performance internal combustion engines. This can be achieved by the well-designed surface texturing of the cylinder bore, which can reduce friction at the ring/bore interface. In this work, dimples were created using plastic deformation on the cylinder surfaces of high-performance motorcycle engines. Prior to texturing, these cylinders had Nikasil coating. One cylinder was subjected to the deposition of DLC coating and then surface texturing. The results of the functional performance of internal combustion engines with textured cylinder surfaces were compared to untextured ones. The engine performance was analysed in terms of maximum power and maximum torque output. The results showed that cylinder surface texturing improved the functional properties of internal combustion engines. The maximum power increased by up to 5.8%. Best performance was achieved for internal combustion engines with textured cylinders and DLC coating. Such surface modification allows the powering of the motorbike with higher maximum speed and provides better vehicle dynamics at high speeds.

Laser Surface Texturing to Realize Micro-grids on DLC Coating: Effect of Marking Speed, Power, and Loop Cycle

“…They evidenced a coefficient of friction that decreased with increasing dimple density, probably because of wear debris trapping. Koszela et al [19] investigated the combined effect of surface texturing and DLC coating on the functional properties of internal combustion engines. They found that cylinder texturing typically led to a decrease in resistance to sliding movement following an increase in the amount of lubricants in dimples.…”

“…Experimental results showed that laser-textured surfaces significantly reduced the wear volume by up to 57%, especially for surface patterns with micro-grids. Moreover, in most of the studies, the surface was first textured by a laser and then coated; however, this led to a modification of the substrate properties due to the interaction with the laser beam [17][18][19][20][21][22][23][24]. On the contrary, works where LST was designed after the coating realized texture that was thicker than the coating depth [16].…”

The Influence of Preparation Conditions on the Structural Properties and Hardness of Diamond-Like Carbon Films, Prepared by Plasma Source Ion Implantation

“…Correlating experimental parameters of DLC film deposition with the resultant chemical and physical film properties is an ongoing task [10][11][12][13][14] that has to consider the specifics of the preparation method and the intended application. In general, for the sample preparation methods that use a gaseous precursor, the hydrogen content of the films can be influenced by the hydrogen to carbon ratio of the precursor gas (e.g., CH 4 , C 2 H 4 , C 7 H 8 or C 2 H 2 ) [5].…”

Integration of solar energy in electrical, hybrid, autonomous vehicles: a technological review

“…Internal combustion engine (ICE) is the most widely used technology in the existing transportation sector that utilizes oil and natural gas as fuel [9][10][11][12][13][14]. Greenhouse gas emissions, depletion of the ozone layer, global warming, air, land, and water etc.…”