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Kaundabalaraman, Kaarthic
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Optimum positioning of FIP drive system for Type-II BSVI engine based on coupled 1d “Valve-train – Chain drive” Dynamic analysis

VE Commercial Vehicles, Ltd.-Kaarthic Kaundabalaraman, Hemantkumar Rathi, Jasvir Singh Bisht
  • Technical Paper
  • 2020-01-1020
To be published on 2020-04-14 by SAE International in United States
The automotive industry is gearing up to meet the accelerated emission compliance changes posed by the government. This transition to eco-friendly system would also necessitate an automotive engineer to retain the engine packaging as compact and simple as possible. The packaging layout considered should not be at the expense of deteriorating engine performance. The work started with concept level layout development, with the aim of having simplified system with minimum number of components. The engine on which the work was carried out was 4cylinder 3Liter with OHC configuration A number of layouts were developed which included gear type, belt drive and integrated shaft arrangement for driving FIP. Each of these concepts were brainstormed with cons and pros, based on which two concepts were initially proposed for driving FIP system (i) Front Driven FIP (ii) Rear Driven FIP. The difference between the two layouts was that in the latter case the FIP system was directly driven through Exhaust Camshaft with gear type arrangement. For the above two proposed layouts, dynamic evaluation was done up-to Max intermittent…
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Piston Bowl Design Optimization to Improve Low Load Torque in BS-VI Diesel Engine based on Multi-dimensional Combustion Simulation

VE Commercial Vehicles, Ltd.-Anish Appukuttan, Jasvir Bisht, Kaarthic Kaundabalaraman, Hemantkumar Rathi
  • Technical Paper
  • 2020-01-0241
To be published on 2020-04-14 by SAE International in United States
In cylinder combustion and emission characteristics are dependent on piston bowl geometry design. Properties like local AF ratio inside the cylinder, in-cylinder fuel air mixing and flame front movement are influenced by piston bowl shape and design. These properties in turns affect the combustion behaviour and the power developed by the diesel engine. In this study piston bowl geometry optimization of a LMD diesel engine is carried out to improve the torque and BSFC output at low to rated operating zones. The optimized bowl geometry is also incorporated in the engine and validated on the test bed. In this work, commercially available CFD code AVL FIRE is used for combustion simulation and bowl geometry optimization. The validation of in-cylinder combustion simulation of a 2L Turbocharged LMD BS-VI diesel engine with base piston bowl geometry is carried out with the available test data. The validation of combustion simulation is performed for four engine operating speed points covering rated torque to rated power operating condition. Four key piston bowl geometry parameters were selected for the optimization study…
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Design & Analysis of Bolt for Normal & Fracture Split Connecting Rod

VE Commercial Vehicles, Ltd.-Kaarthic Kaundabalaraman
Published 2017-01-10 by SAE International in United States
Proper suitability of bolt preload is a pre-requisite whenever we go for component design change. In this paper we have considered connecting rod bolt for our analysis, where-in the design pre-requisite was whether same tightening specification could be carried forward from normal to fracture split type. The present work focuses on comparison of bolt design parameters, inertia force, contact pressure & bearing pressure calculation. Bolt safety factor was used as a parameter to check for the preload suitability with respect to engine max permissible speed. A systematic approach, considering guidelines from available bolt standard and literature was used for carrying out related analysis. For improving the quality of judgment, FEA tools along with durability testing was carried out at ARAI. In addition to this for better bolt preload control “Angle tightening method” of required specification was proposed, with results validated through physical testing.
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Design Analysis & Parametric Optimization of Gerotor Oil Pump for Improving Volumetric Efficiency

VE Commercial Vehicles Ltd.-Anurag Kamal, Kaarthic Kaundabalaraman, Hemantkumar Rathi, Alok Muley
Published 2016-02-01 by SAE International in United States
This work is an effort to find the parallelism between the volumetric efficiency of a Gerotor, and its inherent design parameters: number of teeth, tooth profile, outer dimensions of diameter and thickness, and the input power (torque and speed). The preliminary relations are derived from the software simulation of a range of Gerotor models with varying aforementioned parameters. These results are augmented by a previously proposed method of theoretically estimating the displacement of a Gerotor. Then, these results are validated and revised by practical results from three different Gerotors with epitrochoidal and its conjugate profiles, which are used in automotive applications like engines and transmissions. These relations can be used for choosing parameters yielding the maximum efficiency in specific environments: the packaging space, the input available, and the output required. Finally, an attempt has been made to develop a theoretical formula of the efficiency of a Gerotor in light of the above parameters. According to these results, a prototype Gerotor is proposed and will be validated for its performance.
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