SI engine performance, lubricant oil deterioration, and emission: A comparison of liquid and gaseous fuel

Abstract

Considering the importance of alternative fuels in IC engines for environment safety, compressed natural gas has been extensively employed in SI engines. However, scarce efforts have been made to investigate the effect of compressed natural gas on engine lubricant oil for a long duration. In this regard, a comprehensive analysis has been made on the engine performance, emissions, and lubricant oil conditions using gasoline ( G)92 and compressed natural gas at different operating conditions using reliable sampling methods. The key parameters of the engine performance like brake power and brake-specific energy consumption were investigated at 80% throttle opening within 1500–4500 range of r/min. For the sake of emission tests, speed was varied uniformly by varying the load at a constant throttle. Furthermore, the engine was run at high and low loads for lubricant oil comparison. Although compressed natural gas showed a decrease in brake-specific energy consumption (7.94%) and emissions content, ( G)92 performed relatively better in the case of brake power (39.93% increase). Moreover, a significant improvement was observed for wear debris, lubricant oil physiochemical characteristics, and additives depletion in the case of compressed natural gas than those of ( G)92. The contents of metallic particles were decreased by 23.58%, 36.25%, 42.42%, and 66.67% for iron, aluminum, copper, and lead, respectively, for compressed natural gas.

Refining and Reuse of Waste Lube Oil in SI Engines: A Novel Approach for a Sustainable Environment

“…The parameter increased to 0.67 kg/kWh for the used oil. The regenerated oil showed a decrease in BSFC (0.62 kg/kWh) due to significant improvements in engine oil characteristics [7,48]. However, an average decrease of 5.8% was observed for regenerated oil in comparison with used oil.…”

“…The regeneration of lubricating oil seems to be the most effective remedy to solve this problem, which simply involves the removal of undesirable substances from deteriorated oil. The regeneration not only reduces the quantity of oil being disposed but also the amount of waste of petroleum products [7]. The recycling of oil can contribute to mitigating climate damage [8].…”

Experimental evaluation of methanol-gasoline fuel blend on performance, emissions and lubricant oil deterioration in SI engine

“…Numerous factors like lubricant oil composition, temperature and engine operating states played significant role in fuel consumption. 49 Increase in viscosity of utilized lubricant oil is responsible for oxidation or contamination. 50 Lubricant oil deterioration is primarily dependent on ambient environment, temperature with in engine and total engine running hours.…”

Antioxidant behavior and tribological performance of a novel multifunctional additive in complex lithium grease

“…It is well-known that lubricants are widely used to reduce friction and wear in many mechanical systems, which always operate in harsh environment (Trzepiecinński, 2020; Zhang et al , 2020; Diez-Ibarbia et al , 2020). Therefore, lubricants are fairly straightforward to be contaminated, oxidized and even invalidated as a result of their interaction with the friction pairs under various extreme conditions (Bakunin et al , 2004; Ju et al , 2020; Usman, 2020). To resolve those problems, it is indispensable to introduce lubricant additives into the lubricating systems to guarantee the stable performance of lubricants (Ye et al , 2020; Jiang et al , 2020; Zhan et al , 2019; Wang et al , 2019).…”