Experimental exploration on influence of gas nitriding and chromium coated piston rings in reduction of wear and lubricant consumption in petrol engines

摘要

Even The tribological parameters like friction, lubrication and wear influence strongly the engine component's life. The appropriate lubricant can eliminate the tribological effects. The economy in lubricant consumption needs design modification. This work is motivated by an industrial case of customer complaints excess oil consumption over time and piston rings worn-out within the warranty period etc. So the objectives of this research are to minimize the piston ring wear and lubrication oil consumption and maximize the engine life and its performance. The proposed Gas Nitriding on Piston rings gave appreciable performance than the conventional chromium plated piston rings. The constructive problem solving approach, that is Field Claim Data Analysis (Early Mileage, Durability Claims), Pareto Preparation, Voice of Customer, Brain Storming, Cause & Effect Analysis, Problem Analysis & Process Improvement, Bench Marking Trial Study, Final Countermeasure Implementation, Improvement Monitoring and Standardization were employed to solution the identified real world issues. The necessary inspection and testing methods like oil consumption testing, wear analysis, metallurgical inspection like hardness and chemical composition characterization were included for evaluating the comparative of effects proposed Gas Nitriding of piston rings than conventional chromium plated.