Effect of injection timing of waste plastic oil and its blends on CRDI diesel engine

Abstract

Fossil fuels are a major global concern due to escalating demand and current geo-politics. So demand has been arising for alternative fuel for I C engines. Alternatively, the generation of waste plastic is a severe environmental problem due to global disposal issues; however, it may be converted into alternative fossil fuel with minor amendments in fueling systems. So In this study, blends of waste plastic oil (WPO) have been investigated on CRDI diesel at variable injection timings (IT) (from 26°bTDC to 14°bTDC) to address above mentioned problems. The effect of different injection timings has been analyzed for WPO blends fuels, WPO10D90 (10% WPO+90% Diesel) and WPO20D80 (20% WPO+80% Diesel) and compared with baseline diesel fuel. In the experimental investigations, WPO20D80 achieved optimum results at IT of 17°bTDC; however, the original injection timings (ORG) was 23°bTDC. The optimal result has been provided as 6.7% greater BTE for WPO20D80 at 17°bTDC injection timing, and CO and NOx emissions have been reduced by 16% and 2.15%, respectively. So, suitable IT settings provided considerable improvement in performance and emissions for WPO blends with respect to baseline fuel and original injection timings. Furthermore, it can potentially be a long-term solution for the waste plastic disposal issue.

Reducing Soot Nanoparticles and NOX Emissions in CRDI Diesel Engine by Incorporating TiO2 Nano-Additives into Biodiesel Blends and Using High Rate of EGR

“…According to the studies by Balat et al [8] and Fayad et al [9], biodiesel can be produced from more than 350 oil-bearing crops, including soybeans, castor beans, sunflowers, rapeseed, peanuts, and cottonseed, each constituting potential alternatives for fossil fuel. Kumar et al [10] investigated the effect of waste plastic oil (WPO) blends and variable injection timing on engine performance and emissions in a CRDI diesel engine. They found that the optimal BTE is 6.7% at a 17 • bTDC injection interval, and that the emissions of NO X and CO decreased by 2.15% and 16%, respectively, via the combustion of WPO compared to diesel.…”

Testing high-pressure pumps on the BOSCH test bench

“…It has been used for further research and scientific papers in the field of diesel engine processes [7]. Similar procedures of experimental determination of injection parameters, due to their crucial influence on working processes in engine cylinders, were also applied by other researchers [8][9][10][11][12][13][14][15][16]. Comparative experimental results of in-cylinder pressure flow and injection parameters in direct injection diesel engines are shown in [8], where standard diesel fuel and emulsion of water and diesel fuel are used.…”

“…The effect of experimentally determined injection pressures on performance, power and fuel consumption in direct injection diesel engines is discussed in detail in [11], [13] and [15]. Calculated process parameters of the injection of a medium-speed diesel engine using a computer program developed for this purpose successfully corresponded to the measured [12], and in [14] it was experimentally proven that oils obtained from waste plastic may have similar injection characteristics to petroleum-based diesel fuel. By experimental determination of the pilot injection times, main injection quantities and times, combined with mathematical models of fuel dispersion, combustion and exhaust emissions, it was possible to determine the influence of the mentioned parameters on performance, noise and exhaust emissions of diesel engines [16].…”

Influence of Fuel Injection Timing and Hydrogen Enrichment on Waste Plastic Oil: Performance, Combustion, and Emissions Analysis

“…Research findings suggest that incorporating plastic oil into diesel engines can enhance performance and diminish emissions. A study conducted by Kumar et al [3] illustrated that substituting 20% plastic oil for diesel resulted in a 6.7% increase in Brake Thermal Efficiency (BTE) and lowered NOx and CO emissions by 2.15% and 16%, respectively. Mustayen et al [4] observed notable improvements in torque and horsepower when utilizing plastic oil in diesel engines.…”