Effects of Combustion Chamber Insulation on the Heat Rejection and Thermal Efficiency of Diesel Engines

Low-temperature and premixed combustion concept with late injection

“…One of the approaches to promote the optimal fuel distribution is the combination of a toroidal combustion chamber shape and a higher swirl ratio. Experimental results have further confirmed that this combustion system is effective in reducing cooling losses [8,9].…”

Exploring the Pathway to High Efficiency IC Engines through Exergy Analysis of Heat Transfer Reduction

“…Both of these cases show that the increased gas temperature of LHR engines has a significant effect on ignition delay that cannot be ignored. Kimuru [12] attributed poor combustion to "low flame angular velocity"effectively a measure of swirl. This shows that high temperatures may also damp fluid motion (through increased viscosity), making fuel-air mixing a greater challenge.…”

“…In this configuration, the exhaust port backpressure was set to maximize the total work. 12 The schematics of the engine configurations are shown in Fig. 6.…”

Thermal and Structural Analysis of Functionally Graded NiCrAlY/YSZ/Al2O3 Coated Piston

“…The insulation of the combustion chamber with ceramic coating affects the combustion process causing an increase in available energy that would increase the in-cylinder work and utilizes the energy carried by the exhaust gases, thereby improving the performance and exhaust emissions characteristics of the engines [16,17,18,19]. In general, thermal efficiency can be improved by the adoption of higher compression ratios, in particular for diesel engines and also by reduced in-cylinder heat rejection.…”