Effect of spark timing on laser ignition and spark ignition modes in a hydrogen enriched compressed natural gas fuelled engine

Study of biomethanol as sustainable replacement of Autogas at variable ignition timing

“…On the other hand, Prasad et al. [ 48 ] have favored delayed ignition for gaseous fuel, which increases thermal conditions at the time of spark, reducing the CA10 but CA10–90 after achieving a minimum increase. It reduces T max , which reduces NO x emissions; however, further delay in ignition increases carbon emissions after a certain ignition angle.…”

Optical study on the effects of the hydrogen injection timing on lean combustion characteristics using a natural gas/hydrogen dual-fuel injected spark-ignition engine

“…Extensive studies have been carried out to explore the effects of hydrogen addition on natural gas engines [14][15][16][17][18]. Based on a multi-cylinder turbocharged engine, Ma et al [14][15][16] carried out a series of experimental investigations on the effects of hydrogen enrichment of compressed natural gas (CNG) on engine performance, and they found that hydrogen addition had a positive effect on the improvement of cyclic variation and thermal efficiency.…”

“…Regarding the cycle-to-cycle variations (CCVs), Huang et al [17] reported that the variations in the peak pressure, heat release rate, and ignition delay time were reduced with hydrogen enrichment. Combined with advanced ignition systems, the lean combustion limits of natural gas can be further extended with high hydrogen addition [18]. Through optical diagnostics in a port fuel injection (PFI) engine, Catapano et al [19] found that the methane-hydrogen blends led to more efficient combustion due to the elevation of flame speed.…”

Dynamic Response Characteristics Analysis and Energy, Exergy, and Economic (3E) Evaluation of Dual Loop Organic Rankine Cycle (DORC) for CNG Engine Waste Heat Recovery

“…In the field of oil consumption, the power industry, dominated by internal combustion (IC) engines, occupies a large proportion [1]. Because of its easy access, abundant output, low price, and environmental friendliness, compressed natural gas (CNG) has been widely proposed as an alternative fuel for IC engines [2,3]. Analyzing the energy distribution from the perspective of internal combustion engine thermal balance, it can be found that only part of the energy is converted into useful work, and the remaining energy is mainly lost in the form of waste heat [4].…”