Internal combustion (IC) engine is a prime emitter of greenhouse gases. The piston ring-cylinder liner pair plays a critical role in engine performance and exhaust emissions. Moreover, it accounts for major engine losses. The texturing on the piston ring and nano-material blended engine oil (nano-lubricant) have demonstrated promising results in their respective investigations on the IC engine. So far, most of the studies have been conducted on one of these approaches. Therefore, in this study synergistic effect of textured piston ring and nano-lubricant is investigated on performance parameters (fuel consumption, brake thermal efficiency, and brake specific fuel consumption) and engine emissions. The upper top compression piston ring is textured partially, and the nano-lubricant is prepared using silicate complexes nano-material [Mg₆SiO₁₀(OH)₈] of 1% by weight with multi-grade engine oil (20W-40). The laser surface texturing technique (LST) is used to produce cylindrical textures on the piston ring with 6% texture density and 7.5% aspect ratio. Experiments have been conducted on a single-cylinder, direct injection, air-cooled, naturally aspirated compression ignition engine. All tests have been performed under different loading conditions (20%, 40%, 60%, 80% and 100% of full load). The synergistic effect of partially textured piston ring and nano-lubricant showed lower fuel consumption up to 4.58%, and nano-lubricant showed fuel reduction up to 3.23%. Furthermore, the exhaust emissions (CO, HC, and NOx) demonstrated a reduction that ranges from 0.24% to 10% compared to baseline data.

内燃机 (IC) 发动机是温室气体的主要排放源。活塞环-气缸套对在发动机性能和废气排放方面起着至关重要的作用。此外，它是主要发动机损失的原因。活塞环上的纹理和纳米材料混合发动机油（纳米润滑剂）在各自对 IC 发动机的研究中显示出有希望的结果。到目前为止，大多数研究都是针对其中一种方法进行的。因此，在本研究中，纹理活塞环和纳米润滑剂对性能参数（油耗、制动热效率和制动比油耗）和发动机排放的协同作用进行了研究。上顶压缩活塞环局部织构，纳米润滑剂采用硅酸盐复合物纳米材料[Mg₆ SiO ₁₀ (OH) ₈ ] 1 重量％的多级发动机油 (20W-40)。激光表面纹理技术 (LST) 用于在活塞环上产生具有 6% 纹理密度和 7.5% 纵横比的圆柱形纹理。已经在单缸、直喷、风冷、自然吸气压燃发动机上进行了实验。所有测试均在不同的负载条件下进行（20%、40%、60%、80% 和 100% 的满载）。局部纹理化的活塞环和纳米润滑剂的协同作用表现出更低的油耗高达4.58%，纳米润滑剂的油耗降低高达3.23%。此外，与基线数据相比，废气排放（CO、HC 和 NOx）的减少范围为 0.24% 至 10%。