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Improvement in thermal efficiency and reduction in emission from diesel engines are major thrust research work in all around the world. This research work is on the performance and emission characteristics of diesel engine using Low Heat Rejection (LHR) techniques of thermal barrier coated cylinder liner and piston. A piston was coated as 100 micron thickness and three cylinder liners were coated in the thickness of 100,150 and 200 micron. Piston and cylinder liners were coated with equal percentages of Alumina and Yittria Stabilized Zirconia powder using the plasma spraying coating method. The test results compared with base engine showed reduction in the performance parameter of specific fuel consumption (SFC) on an average by 6.11%, 12.78% and 16.89%, while the brake thermal efficiency increased by 1.68%,3.75% and 5.19% in 100,150 and 200 micron thickness coated cylinder liner used engine respectively. There was reduction in Carbon monoxide (CO), unburned hydrocarbon (HC) and smoke emissions levels while Nitrogen Oxide (NOx) emission was slightly higher in the coated engine compared with the uncoated engine in all load conditions. Overall, 200 microns thickness coated cylinder liner showed a better performance parameter and low emission compared with other cylinder liner coated engine.

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Abstract-Adhesive fasteners are used in a wide range of engineering applications because they have an immense edge when related to other traditional fasteners. An important point of consideration is their ability to distribute the weight consistently over the connected region resulting in excellent damping qualities. Adhesive fasteners can be used for the bonding of dissimilar substrates. The calculation of crack travel parameters is used as a tool for quantifying the adhesive joint's finer qualities. This is done with the help of different experiments based on the prevalent loading scenarios existing in the engineering applications. The frequent investigations are often slowed down by the irrationality of the substrate and adhesive performance which may be attributed to the character of crack travel, and the specimen geometry. The effect of resin and hardener proportion ratio alteration is an important point which needs to be addressed for the adhesive joint validation and existence. The Double Cantilever Beam (DCB) test used exclusively for the mode-1 loading criteria is selected as an overall tool for all the tests conducted which successfully incorporated the resin and hardener proportion changes. The alteration of the resin and hardener proportion and its influence on the crack travel is explored in a limited direction and perspective. An effort was made in this research work towards analyzing the adhesive mixture variation and its impact on the joint sustenance with the help of tensile tests involving RH components including variations in the hardener resin mixture. The diagnostic and the investigational outcomes provided considerable insights on the adhesive joint toughness justifications.