Browse Publications Technical Papers 2018-28-0059
2018-07-09

OPTIMISATION OF “PISTON RING PARAMETERS” OF A COMMONRAIL - TCIC DIESEL ENGINE FOR BETTER PERFORMANCE 2018-28-0059

Abstract The usage of the Turbocharged Intercooled Diesel Engine automobiles for domestic transport is common due to its High Torque output. The Piston Rings are one of the most critical components in any reciprocating Internal Combustion engines. In this paper, a BS IV, 105 PS, 4 Cylinder, CRAIL TCIC 1.50L Diesel Engine Piston Ring Pack's design is considered wherein the engine itself is a New Product Development. With high Power density & higher operating pressures, The Engine called for higher Endurance of the Piston Ring Parts with lower blow by & lower Oil Consumption performance throughout it's life. Based on the Benchmark, the Piston Rings are designed with CrN, GN & GN coating protection over the base materials of the Top, 2nd & Oil Rings respectively for withstanding the aggressive operating conditions. The parts are developed and validated. The Combustion Gas Blow By Performance results are not within the targeted limits. To address the performance requirements of the Engine, the Ring pack called for improvements. AVL Excite Piston Ring dynamics simulation software v2016 is used for the design validation of the Maiden design (Bench mark) and improved Engine Ring pack respectively. The improved Ring Pack includes modifications such as Top Ring Closed Gap, Top Ring outer Periphery bottom chamfer, advancements in the Top Ring Peripheral Coating (GN) and advancements in the Oil Ring base material properties (High Chrome Steel). The Ring Pack's dynamics and performance results of both Ring pack models are simulated and compared. Based on the simulated results, the Piston Ring pack parameters are optimized to meet the customer engine targets. The Parts are developed and subjected to the real time Dynamometer validation. The Combustion Gas Blow by, Oil Consumption and Piston Ring's Peripheral wear performance results are within the Target Limits & expectations respectively.

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